CN110957719B - Communication power supply design system and design method for nuclear power plant - Google Patents
Communication power supply design system and design method for nuclear power plant Download PDFInfo
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- CN110957719B CN110957719B CN201911100876.2A CN201911100876A CN110957719B CN 110957719 B CN110957719 B CN 110957719B CN 201911100876 A CN201911100876 A CN 201911100876A CN 110957719 B CN110957719 B CN 110957719B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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Abstract
The invention provides a communication power supply design system and method for a nuclear power plant, which comprises the following steps: the power input assembly is provided with three independent power input screens and/or input boxes which are respectively and correspondingly connected with three paths of power supplies in different columns; the power input assembly is used for selectively switching into a power supply in one line of three different lines under normal working conditions and accident working conditions (including LOOP working conditions and SBO working conditions); the UPS component is used for supplying power to the communication system under normal or accident working conditions; in the SBO condition, the UPS component only supplies power to the emergency communication AC load equipment of the nuclear power plant. The invention has the capability of keeping power supply for the communication system under the conditions that the SBO diesel engine is accessed into the mobile emergency diesel engine in failure and the SBO diesel engine is accessed into the mobile emergency diesel engine, and meets the requirement that effective communication means are available after all assumed starting events and under the accident condition. Meanwhile, the condition that the single-point fault of the double-path alternating current input screen causes the power supply of most communication systems to lose is avoided, and the power supply utilization efficiency and the expansion capability are improved.
Description
Technical Field
The invention relates to the technical field of nuclear power plants, in particular to a nuclear power plant communication power supply design system and a design method.
Background
The nuclear power plant communication power supply system arranged in the nuclear power plant communication network center machine room is the heart of the nuclear power plant communication system, and plays a key role in playing a vital role in normal operation of the whole plant communication system. The nuclear power plant communication power supply system is required to keep normal operation when the nuclear power plant normally operates, and also cannot be paralyzed under the working condition of an accident, so that normal service is required to be maintained, and effective communication means can be used after all assumed starting events and under the working condition of the accident. Accident conditions of the nuclear power plant which have great influence on the communication power supply mainly include: SBO (station (supply) Black Out, station supply interruption/station blackout accident) operating condition, and LOOP (Loss Of off Power) operating condition. With the continuous improvement of the requirements of the production, operation and maintenance of the nuclear power plant on the communication system, the design requirements of the communication power supply are improved, the conventional design is difficult to meet the continuous improvement of the requirements, and the continuous improvement of the requirements provides extremely high challenges for the design of the communication system of the nuclear power plant including the communication power supply. Therefore, the design of the power supply system of the nuclear power plant communication network center machine room needs to be continuously explored and innovated, and a new design method and a new design system are formed.
The existing nuclear power plant communication power supply system is shown in fig. 1 and mainly comprises a double-path alternating current input screen, a UPS cabinet, a UPS storage battery pack, an alternating current distribution box, a high-frequency switching power supply and a direct current distribution box, wherein, the UPS cabinet, the UPS storage battery pack, the AC distribution box and the high-frequency switch power supply adopt two sets, the double-path AC input screen adopts two paths of input of a normal power supply and an emergency power supply, the output of the power supply is supplied to the bypass input of the UPS cabinet 1, the two-way input of the UPS cabinet 2 and the input of the high-frequency switching power supply 2, the main input of the UPS cabinet 1 is from the other emergency power supply, the input of the AC distribution box is from the output of the UPS cabinet, one path of the alternating current distribution box 2 is output to the high-frequency switching power supply 1, so that direct current distribution loads can be indirectly provided with storage batteries, the UPS storage battery pack is correspondingly connected into the UPS cabinet, and all communication system main equipment supplies power through the corresponding alternating current distribution box and the corresponding direct current distribution box. The current system has the following defects: 1. under the conditions of SBO working condition and SBO diesel engine failure access mobile emergency diesel engine, namely under the condition that normal power supply and emergency power supply are all failed, when the electric quantity of the storage battery is exhausted (after 0.5 hour), all communication systems needing power supply are paralyzed, wherein communication subsystems related to emergency response, such as wired broadcasting, sound alarm, wireless communication, safety telephone and the like, are involved, only the acoustic telephone system (one subsystem of the communication system) is available, the availability of the communication system is greatly reduced, the use range is reduced, and the requirement of emergency response of a nuclear power plant cannot be met; 2. the two-way AC input screen is connected with the upstream two-way input and redistributed to the downstream UPS cabinet and the high-frequency switching power supply, when the two-way AC input screen fails, most of the power supply of the communication system is lost, the availability of the communication system is greatly reduced, and the application range is narrowed; 3. the upstream of one high-frequency switching power supply is led to the alternating-current distribution box, more power supply equipment passes through, the power supply loss is increased, and the power supply utilization efficiency is reduced; 4. alternating current and direct current distribution boxes are adopted for power distribution of a communication system, the expansion capability is limited, and the situation that the output capability of a distribution box feeder line is insufficient can occur.
Therefore, the existing nuclear power plant communication power supply system needs to be improved, so that the system can still maintain power supply to communication subsystems related to emergency response, such as wired broadcasting, sound alarm, wireless communication, safety telephone and the like under the working condition of power supply accident SBO and the working condition of accessing the SBO diesel engine to the mobile emergency diesel engine in case of failure, and the requirement of emergency response of the nuclear power plant is met; in addition, there is a need to improve the upstream power input, avoid the power loss of most communication systems due to single-point failure, and further optimize the input/output relationship of the high-frequency switching power supply and the configuration of the ac and dc power distribution equipment, so as to improve the power utilization efficiency and the expansion capability.
Disclosure of Invention
The invention provides a nuclear power plant communication power supply design system and a design method, aiming at solving the problems that the current nuclear power plant communication power supply system cannot maintain power supply under the working conditions of power supply accident SBO and SBO diesel engine failure access mobile emergency diesel engine, and the problems of improper system power distribution equipment configuration, poor reliability and low power supply utilization efficiency, and combining the current technical situation in a nuclear power plant, the invention provides the nuclear power plant communication power supply design system and the design method, and the specific technical scheme is as follows:
a nuclear power plant communication power supply design system, comprising:
the power input assembly is provided with three independent power input screens and/or input boxes and is respectively and correspondingly connected with three paths of power supplies in different columns; the power input assembly is used for selecting one power supply of three different power supplies in different columns when in normal working conditions and accident working conditions, wherein the accident working conditions comprise an LOOP working condition and an SBO working condition;
the UPS component is connected with the power input component and used for supplying power to the nuclear power plant communication alternating current and direct load equipment and the nuclear power plant emergency communication alternating current load equipment under the normal or accident working condition; under the LOOP working condition, the UPS component can still supply power to all communication AC and DC load equipment and emergency communication AC load equipment; and in the SBO working condition, the UPS component only supplies power to the emergency communication alternating current load equipment of the nuclear power plant.
As an improvement, the three different power supplies comprise a normal power supply, an emergency power supply and an SBO power supply, and the power supply input assembly comprises a first alternating current power supply input screen, a second alternating current power supply input screen and an alternating current input box;
the input end of the first alternating current power supply input screen is connected with a normal power supply of a nuclear power plant column C, the input end of the second alternating current power supply input screen is connected with an emergency power supply of a nuclear power plant column B, and the input end of the alternating current input box is connected with an SBO power supply of a nuclear power plant column A;
the output ends of the first alternating current power supply input screen, the second alternating current power supply input screen and the alternating current input box are respectively connected to the UPS component; the UPS component is also used for respectively supplying power to the communication AC load equipment, the communication DC load equipment and the emergency communication AC load equipment of the nuclear power plant connected with the corresponding line of the UPS component according to the different input power sources.
As an improvement, the UPS assembly comprises: the system comprises a first UPS component used for supplying power to a nuclear power plant communication alternating current load device, a second UPS component used for supplying power to the nuclear power plant communication alternating current load device and a third UPS component used for supplying power to a nuclear power plant emergency communication alternating current load device;
the first alternating current power supply input screen is connected with the first UPS component and the second UPS component; the second alternating current power supply input screen is connected with the first UPS component, the second UPS component and the third UPS component; the alternating current input box is connected with the third UPS assembly;
under a normal working condition, the power supplies of the A, B and C columns are connected into a normal power supply to supply power to communication load equipment correspondingly connected with the UPS component through the power supply input component;
under the working condition of an LOOP accident, the power supply of the B column is connected with the emergency diesel engine power supply, and power is respectively supplied to two paths of nuclear power plant communication alternating current load equipment and nuclear power plant emergency communication alternating current load equipment which are connected with the first UPS component, the second UPS component and the third UPS component through the second alternating current power supply input screen;
and when the SBO accident condition is met, the A-row power supply is connected into the SBO diesel engine or the mobile emergency diesel engine, and the power is supplied to the emergency communication alternating current load equipment of the nuclear power plant through the alternating current input box.
As an improvement, the first UPS assembly includes a first UPS cabinet and a first UPS output cabinet, the first UPS cabinet is connected to the first ac power input panel, the second ac power input panel, and the first UPS output cabinet respectively;
the second UPS component comprises a second UPS cabinet and a second UPS output cabinet, wherein the second UPS cabinet is respectively connected with the first alternating current power supply input screen, the second alternating current power supply input screen and the second UPS output cabinet;
the third UPS component comprises a third UPS cabinet and a third UPS output cabinet, and the third UPS cabinet is respectively connected with the second alternating current power supply input screen and the third UPS output cabinet;
under a normal working condition or an accident working condition (no SBO working condition), the power can be supplied to the nuclear power plant communication alternating current load equipment and the nuclear power plant emergency communication alternating current load equipment in two paths through the first UPS output cabinet, the second UPS output cabinet or the third UPS output cabinet; and under the SBO working condition, the power is supplied to the emergency communication alternating current load equipment of the nuclear power plant only through the third UPS output cabinet.
As an improvement, the first UPS assembly further comprises a first UPS battery pack connected to the first UPS cabinet, the first UPS battery pack being configured to provide temporary power when the first UPS cabinet has no power input.
As an improvement, the second UPS module further comprises a second UPS battery pack connected to the second UPS cabinet, the second UPS battery pack being configured to provide temporary power when the second UPS cabinet has no power input.
As an improvement, the third UPS module further comprises a third UPS battery pack connected to the third UPS cabinet, the third UPS battery pack being configured to provide temporary power when the third UPS cabinet has no power input.
As an improvement, the UPS module further includes a high-frequency switching power supply and a dc distribution panel, which are respectively connected to the first ac power input panel and the second ac power input panel, and are configured to convert an ac power supply into a dc power supply to supply power to the dc load device for communication in the nuclear power plant under a normal operating condition or an accident operating condition.
As an improvement, the high-frequency switching power supply and the direct current distribution panel are connected with a high-frequency switching power supply storage battery pack, and the high-frequency switching power supply storage battery pack is used for providing temporary power supply when the high-frequency switching power supply and the direct current distribution panel have no power supply input.
As an improvement, the system also comprises a mobile emergency diesel engine power supply and a switch component connected in front of three different power supplies in the A, B and C rows;
the switch assembly includes: switches MA, MB, MC, M2, M5, M8, and M10 connected to the a-column power supply line, switches M3 and M6 connected to the C-column power supply line, and switches M4, M,7, M9, and M11 connected to the B-column power supply line;
when the communication system is in a normal working condition, all power supplies in the A, B, C column can be used by controlling all switches except the switches M5, M6, M7 and M10-M11 to be closed, and all the power supplies can supply power to a normal power supply, an emergency power supply and an SBO power supply of the communication system;
when normal distribution equipment fails and under accident conditions, the switches MA, MB, MC, M2, M3 and M4 are controlled to be switched off, the switches M5, M6 and M7 are switched on, the states of the other switches are unchanged, the A, B, C-column emergency diesel engine is started, and an emergency power supply and an SBO power supply which are led to the communication system supply power;
when the emergency diesel engine fails, the SBO diesel engines in the A, B column are started by controlling the opening switches M5, M6 and M7 and the switches M10 and M11 to be closed, and the other switches are unchanged, so that the SBO power supplies of the communication system are led to supply power;
and when the SBO diesel engine fails, the mobile emergency diesel engine is accessed, and the SBO power supply led to the communication system can supply power.
A nuclear power plant communication power supply design method is realized by the nuclear power plant communication power supply design system, and the method comprises the following steps:
the upper stream of a power supply system of a central machine room of a nuclear power plant communication network is respectively led from three power supplies of different columns, the power supply system comprises an upper stream power supply which is respectively led from a normal power supply, an emergency power supply and an SBO power supply, the normal power supply, the emergency power supply and the SBO power supply are different columns, and one power supply of the three power supplies of different columns is selected to be switched in under normal working conditions and accident working conditions; supplying power to the nuclear power plant communication alternating current load equipment and the nuclear power plant emergency communication alternating current load equipment when the normal or non-SBO accident condition exists; and only supplying power to the emergency communication alternating current load equipment of the nuclear power plant under the SBO working condition.
As an improvement, three different power sources are respectively input into the UPS component through the first AC power input screen, the second AC power input screen or the AC input box,
the input end of the first AC power input screen is connected with the normal power supply of the C row, the input end of the second AC power input screen is connected with the emergency power supply of the B row, the input end of the AC input box is connected with the SBO power supply of the A row,
the output ends of the first alternating current power supply input screen, the second alternating current power supply input screen and the alternating current input box are respectively connected to different UPS cabinets of the UPS component; and the corresponding UPS cabinets respectively supply power to the communication alternating current load equipment of the nuclear power plant connected with the corresponding columns of the UPS cabinets according to the different columns of power sources.
As an improvement, the UPS assembly comprises: the system comprises a first UPS component for supplying power to the nuclear power plant communication alternating current load equipment, a second UPS component for supplying power to the nuclear power plant communication alternating current load equipment and a third UPS component for supplying power to the nuclear power plant emergency communication alternating current load equipment;
the first alternating current power supply input screen is connected with the first UPS component and the second UPS component; the second alternating current power supply input screen is connected with the first UPS component, the second UPS component and the third UPS component; the alternating current input box is connected with the third UPS assembly;
under a normal working condition, the C-column power supply serves as a standby power supply and supplies power to communication alternating-current load equipment connected with the first UPS assembly and the second UPS assembly through the first alternating-current power supply input screen, the B-column power supply serves as a main power supply and supplies power to communication alternating-current load equipment connected with the first UPS assembly and the second UPS assembly through the second alternating-current power supply input screen, meanwhile, the B-column power supply serves as a standby power supply and supplies power to emergency communication alternating-current load equipment connected with the third UPS assembly through the second alternating-current power supply input screen, and the A-column power supply serves as a main power supply and supplies power to emergency communication alternating-current load equipment connected with the third UPS assembly through the alternating-current input box;
under the working condition of an LOOP accident, the B-column power supply supplies power to two paths of nuclear power plant communication alternating current load equipment and nuclear power plant emergency communication alternating current load equipment which are connected with the first UPS component, the second UPS component and the third UPS component through the second alternating current power supply input screen;
and when the SBO accident condition is met, the A-column power supply supplies power to the emergency communication alternating current load equipment of the nuclear power plant through the alternating current input box.
As an improvement, the SBO power supply is also connected with a mobile emergency diesel engine to realize power supply.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
after the technical scheme of the invention is adopted, the power supply system of the nuclear power plant communication network center machine room has the capability of maintaining power supply for the communication system under the SBO working condition and the working condition that the SBO diesel engine is in failure access to the mobile emergency diesel engine, and meets the requirement that effective communication means are available after all assumed starting events and under the accident working condition. Meanwhile, the condition that the power supply of most communication systems is lost due to single-point faults of the double-path alternating current input screen is avoided, and the power supply utilization efficiency and the expansion capability are further improved.
The input of an upstream power supply is improved, and the two alternating current input screens are respectively connected to a normal power supply and an application power supply, so that the condition that the power supply of most communication systems is lost due to single-point failure is avoided; the input-output relation of the high-frequency switch power supply and the configuration of the alternating current and direct current distribution equipment are further optimized, only one set of the high-frequency switch power supply and the direct current distribution panel are arranged to supply power to the communication system, and the upstream of the high-frequency switch power supply and the direct current distribution panel are directly led from two alternating current input panels respectively, so that the utilization efficiency and the expansion capability of the power supply are improved
Drawings
FIG. 1 is a schematic diagram of a prior art nuclear power plant communication power supply system;
FIG. 2 is a schematic structural diagram of an embodiment of a communication power supply design system of a nuclear power plant according to the present invention;
FIG. 3 is a schematic diagram of power connections of an embodiment of a nuclear power plant communication power supply design system provided by the invention.
Detailed Description
The invention aims to solve the problems that in the prior art, a nuclear power plant communication power supply system cannot maintain power supply under the working condition of power supply accident SBO and the working condition that an SBO diesel engine is in failure access to a mobile emergency diesel engine, and the problems of improper configuration of power distribution equipment, poor reliability and low power utilization efficiency of the conventional system are solved, and the nuclear power plant communication power supply design system and the nuclear power plant communication power supply design method are provided, and the core idea is as follows: the upper stream of the nuclear power plant communication power supply system is respectively led from three different power supplies, namely a normal power supply, an emergency power supply and an SBO power supply, wherein the SBO power supply can be connected to a mobile emergency diesel engine to realize power supply, and the SBO diesel engine is mounted on the mobile emergency diesel engine after failure, so that the emergency communication system has available communication means under the SBO working condition and the working condition that the SBO diesel engine is failed and connected to the mobile emergency diesel engine; the input of an upstream power supply is improved, and the two alternating current input screens are respectively connected to a normal power supply and an application power supply, so that the condition that the power supply of most communication systems is lost due to single-point failure is avoided; the input-output relation of the high-frequency switch power supply and the configuration of the alternating current and direct current distribution equipment are further optimized, only one set of the high-frequency switch power supply and the direct current distribution panel are arranged to supply power to the communication system, and the upstream of the high-frequency switch power supply and the direct current distribution panel are directly led from the two alternating current input panels respectively, so that the power supply utilization efficiency and the expansion capability are improved.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Examples
Fig. 2 is a schematic structural diagram of an embodiment of a nuclear power plant communication power supply design system provided by the present invention, and the system includes:
the power input assembly is provided with three independent power input screens and/or input boxes and is respectively and correspondingly connected with three paths of power supplies in different columns; the emergency power supply is used for selectively switching into one power supply of three different power supplies in a row by the power input assembly under normal working conditions and accident working conditions, the normal power supply is available under normal operation working conditions, the emergency power supply and the SBO power supply are supplied with power by the normal power supply, when the normal power supply is unavailable, the emergency power supply is used for realizing power supply by starting the emergency diesel engine under the LOOP accident working condition, the SBO power supply is supplied with power by the emergency power supply, the normal power supply and the emergency power supply are unavailable under the SBO working condition, the SBO power supply is taken from the power supply which is used for realizing power supply by the SBO diesel engine, namely the SBO power supply is available under the SBO working condition;
the UPS component is connected with the power input component and used for supplying power to the nuclear power plant communication alternating current and direct load equipment and the nuclear power plant emergency communication alternating current load equipment under the normal or accident working condition; under the LOOP working condition, the UPS component can still supply power to all communication AC and DC load equipment and emergency communication AC load equipment; and in the SBO working condition, the UPS component only supplies power to the emergency communication alternating current load equipment of the nuclear power plant.
In summary, all communication subsystems are powered by normal power supplies under normal working conditions, if the normal power supplies are unavailable under accident working conditions, all communication subsystems are powered by emergency power supplies, the normal power supplies and the emergency power supplies are unavailable under SBO working conditions and working conditions that the SBO diesel engine is in failure connection with the mobile emergency diesel engine, and the communication subsystems related to the emergency response of the nuclear power plant are powered by the SBO power supplies.
As a modified embodiment, the three different power sources include a normal power source, an emergency power source and an SBO power source, and the power input assembly includes a first ac power input panel, a second ac power input panel and an ac input box;
the input end of the first alternating current power supply input screen is connected with a normal power supply of a nuclear power plant column C, the input end of the second alternating current power supply input screen is connected with an emergency power supply of a nuclear power plant column B, and the input end of the alternating current input box is connected with an SBO power supply of a nuclear power plant column A;
the output ends of the first alternating current power supply input screen, the second alternating current power supply input screen and the alternating current input box are respectively connected to the UPS component; the UPS component is also used for respectively supplying power to the communication AC load equipment, the communication DC load equipment and the emergency communication AC load equipment of the nuclear power plant connected with the corresponding line of the UPS component according to the different input power sources.
As an improved embodiment, the UPS assembly includes: the system comprises a first UPS component used for supplying power to a nuclear power plant communication alternating current load device, a second UPS component used for supplying power to the nuclear power plant communication alternating current load device and a third UPS component used for supplying power to a nuclear power plant emergency communication alternating current load device;
the first alternating current power supply input screen is connected with the first UPS component and the second UPS component; the second alternating current power supply input screen is connected with the first UPS component, the second UPS component and the third UPS component; the AC input box is connected with a third UPS assembly.
Under a normal working condition, the power supplies of the A, B and C columns are connected into a normal power supply to supply power to communication load equipment correspondingly connected with the UPS component through the power supply input component; the C column of power supplies serve as standby power supplies and supply power to communication alternating current load equipment connected with the first UPS assembly and the second UPS assembly through the first alternating current power supply input panel, and meanwhile, the C column of power supplies serve as standby power supplies and supply power to communication direct current load equipment through the high-frequency switching power supply and the direct current distribution panel; the B column of power supplies are connected with the B column of normal power supplies, and used as a main power supply to supply power to communication alternating current load equipment connected with the first UPS component and the second UPS component through the first alternating current power supply input screen, meanwhile, the B column of power supplies are used as a main power supply to supply power to the communication direct current load equipment through the high-frequency switch power supply and the direct current distribution screen, and also used as a standby power supply to supply power to emergency communication alternating current load equipment connected with the third UPS component through the alternating current input box; the A-column power supply is connected with the A-column normal power supply and used as a main power supply to supply power to emergency communication alternating current load equipment connected with the third UPS component through the alternating current input box.
Under the working condition of an LOOP accident, the power supply of the B column is connected with the emergency diesel engine power supply, and power is respectively supplied to two paths of nuclear power plant communication alternating current load equipment and nuclear power plant emergency communication alternating current load equipment which are connected with the first UPS component, the second UPS component and the third UPS component through the second alternating current power supply input screen;
and when the SBO accident condition is met, the A-row power supply is connected into the SBO diesel engine or the mobile emergency diesel engine, and the power is supplied to the emergency communication alternating current load equipment of the nuclear power plant through the alternating current input box. The mobile emergency diesel engine is put into use after the SBO diesel engine fails, and the SBO power supply is mounted on the mobile emergency diesel engine at the moment, so that the SBO power supply is still available, namely the SBO power supply has power supply capacity under the SBO working condition and the working condition that the SBO diesel engine fails to be connected into the mobile emergency diesel engine.
Under other accident conditions without power loss, the power supply mode of the communication system equipment is the same as that under the normal working condition.
As an improved embodiment, the first UPS assembly includes a first UPS cabinet, a first UPS output cabinet, and the first UPS cabinet is connected to the first ac power input screen, the second ac power input screen, and the first UPS output cabinet, respectively;
the second UPS component comprises a second UPS cabinet and a second UPS output cabinet, wherein the second UPS cabinet is respectively connected with the first alternating current power supply input screen, the second alternating current power supply input screen and the second UPS output cabinet;
the third UPS component comprises a third UPS cabinet and a third UPS output cabinet, and the third UPS cabinet is respectively connected with the second alternating current power supply input screen and the third UPS output cabinet;
under a normal working condition or an accident working condition (no SBO working condition), power can be supplied to the two-way nuclear power plant communication alternating current load equipment and the nuclear power plant emergency communication alternating current load equipment through the first UPS output cabinet, the second UPS output cabinet or the third UPS output cabinet; and under the SBO working condition, the power is supplied to the emergency communication alternating current load equipment of the nuclear power plant only through the third UPS output cabinet.
It should be noted that: because the communication subsystems related to the emergency response of the nuclear power plant are mainly used under the SBO working condition and the subsequent development working condition, the UPS output cabinet 3 under the loading of the SBO power supply only needs to supply power for the communication subsystems related to the emergency response of the nuclear power plant, and therefore the load requirement of the SBO power supply can be reduced. In addition, the input of the UPS output cabinet is led from the corresponding UPS cabinet, and the main equipment alternating current part of each communication subsystem is distributed by the UPS output cabinet. The UPS output cabinet replaces an AC distribution box, and the feeder output capacity of the UPS output cabinet is far greater than that of the AC distribution box, so that the UPS output cabinet has relatively great expansion capacity.
As an improved embodiment, the first UPS assembly further comprises a first UPS battery pack connected to the first UPS cabinet, and the first UPS battery pack is configured to provide temporary power when the first UPS cabinet has no power input.
In an improved embodiment, the second UPS module further comprises a second UPS battery pack connected to the second UPS cabinet, and the second UPS battery pack is configured to provide temporary power when the second UPS cabinet has no power input.
As an improved embodiment, the third UPS assembly further comprises a third UPS battery pack connected to the third UPS cabinet, and the third UPS battery pack is configured to provide temporary power when the third UPS cabinet has no power input.
As an improved embodiment, the UPS assembly further includes a high-frequency switching power supply and a dc distribution board, which are respectively connected to the first ac power input board and the second ac power input board, and are configured to convert an ac power into a dc power to supply power to the dc load device for nuclear power plant communication under a normal operating condition or an accident operating condition.
It should be noted that: because the communication subsystem main equipment of direct current power supply is less and does not have the equipment of two way direct current power supplies, consequently set up a set of high frequency switching power supply to with its direct current distribution panel distribution design for a rack in order to reduce the rack screen position, high frequency switching power supply input is directly drawn from two exchanges input screens respectively, reduces the power supply equipment that passes through, therefore has reduced the power loss, has improved power utilization efficiency.
As a modified embodiment, the high-frequency switching power supply and the dc distribution board are connected with a high-frequency switching power supply storage battery, and the high-frequency switching power supply storage battery is used for providing temporary power supply when the high-frequency switching power supply and the dc distribution board have no power supply input.
As an improved embodiment, the system also comprises a mobile emergency diesel engine power supply and a switch assembly connected in front of three different power supplies in the A column, the B column and the C column, and system power connections are shown in figure 3. Wherein remove emergent diesel engine power supply and provide through removing emergent diesel engine, remove emergent diesel engine's effect and lie in substituting the effect of SBO diesel engine for nuclear power plant important power load power supply when the SBO diesel engine became invalid.
The switch assembly includes: switches MA, MB, MC, M2, M5, M8 and M10 connected to the a column power supply line, switches M3 and M6 connected to the C column power supply line, and switches M4, M,7, M9 and M11 connected to the B column power supply line.
The connection relationship among the power supply, the switch assembly and the electric bus is as follows:
external power is respectively led into a first bus of A, B, C columns from normal distribution equipment through switches MA, MB and MC, wherein the normal distribution equipment comprises a nuclear power plant generator power supply, an off-plant power supply, a transformer and related lines for cross power supply, and the external power supply is used for inputting the nuclear power plant generator power supply or the off-plant power supply to the switches MA, MB and MC through the transformer and the related lines for cross power supply;
in the A column, the A column second bus is connected to the A column first bus through a switch M2, the A column emergency diesel engine is connected to the A column second bus through a switch M5, the A column third bus is connected to the A column second bus through a switch M8, the A column SBO diesel engine is connected to the A column third bus through a switch M10, and the A column third bus is led to an SBO power supply of the communication power supply system through a switch M;
in the C column, a second bus of the C column is connected to a first bus of the C column through a switch M3, an emergency diesel engine of the C column is connected to the second bus of the C column through a switch M6, and the first bus of the C column is led to a normal power supply of the communication power supply system through the switch M;
in the B column, a B column second bus is connected to a B column first bus through a switch M4, a B column emergency diesel engine is connected to the B column second bus through a switch M7, a B column third bus is connected to the B column second bus through a switch M9, a B column SBO diesel engine is connected to the B column third bus through a switch M11, and the B column second bus is led to emergency power of a communication power supply system through the switch M.
The following functions can be achieved by switching the switches:
the switch M controls the access of a normal power supply, an emergency power supply and an SBO power supply of the communication power supply system, when the switch M is closed, the normal power supply, the emergency power supply and the SBO power supply are all accessed to the communication power supply system, and when the switch M is disconnected, the normal power supply, the emergency power supply and the SBO power supply are not accessed to the communication power supply system;
when the communication system is in a normal working condition, all power supplies in the A, B, C column can be used by controlling all switches except the switches M5, M6, M7 and M10-M11 to be closed, and all the power supplies can supply power to a normal power supply, an emergency power supply and an SBO power supply of the communication system;
when normal distribution equipment fails and under accident conditions, the switches MA, MB, MC, M2, M3 and M4 are controlled to be switched off, the switches M5, M6 and M7 are switched on, the states of the other switches are unchanged, the A, B, C-column emergency diesel engine is started, at the moment, a normal power supply led to a communication system cannot supply power, and an emergency power supply led to the communication system and an SBO power supply can supply power;
when the emergency diesel engine fails, the switches M10 and M11 are controlled to be closed by controlling the disconnection switches M5, M6 and M7, the states of the other switches are unchanged, the SBO diesel engines in the A, B column are started, the normal power supply and the emergency power supply of the communication system cannot supply power at the moment, and the SBO power supply of the communication system can supply power;
and when the SBO diesel engine fails, the mobile emergency diesel engine is accessed, and the SBO power supply led to the communication system can supply power.
The invention also provides an embodiment of a nuclear power plant communication power supply design method, which can be realized by utilizing the embodiment of the nuclear power plant communication power supply design system, and the method comprises the following steps:
the upper stream of a power supply system of a central machine room of a nuclear power plant communication network is respectively led from three power supplies of different columns, the power supply system comprises an upper stream power supply which is respectively led from a normal power supply, an emergency power supply and an SBO power supply, the normal power supply, the emergency power supply and the SBO power supply are different columns, and one power supply of the three power supplies of different columns is selected to be switched in under normal working conditions and accident working conditions; supplying power to the nuclear power plant communication alternating current load equipment and the nuclear power plant emergency communication alternating current load equipment when the normal or non-SBO accident condition exists; and only supplying power to the emergency communication alternating current load equipment of the nuclear power plant under the SBO working condition.
As a modified embodiment, three different power sources are respectively input into the UPS component through the first AC power input screen, the second AC power input screen or the AC input box,
the input of first alternating current power supply input screen is connected the normal power that C was listed as, and the emergency power that B was listed as is connected to the input of second alternating current power supply input screen, and the SBO power that A was listed as is connected to the input of alternating current input case, so on: the input end of the first alternating current power supply input screen is connected with the normal power supplies in the B row, the input end of the second alternating current power supply input screen is connected with the emergency power supplies in the C row, and the input end of the alternating current input box is connected with the SBO power supplies in the A row; the input end of the first alternating current power supply input screen is connected with the normal power supplies in the row C, the input end of the second alternating current power supply input screen is connected with the emergency power supplies in the row A, and the input end of the alternating current input box is connected with the SBO power supplies in the row B; the input end of the first alternating current power supply input screen is connected with a normal power supply in the column A, the input end of the second alternating current power supply input screen is connected with an emergency power supply in the column C, and the input end of the alternating current input box is connected with an SBO power supply in the column B.
The output ends of the first alternating current power supply input screen, the second alternating current power supply input screen and the alternating current input box are respectively connected to different UPS cabinets of the UPS component; and the corresponding UPS cabinets respectively supply power to the communication alternating current load equipment of the nuclear power plant connected with the corresponding columns of the UPS cabinets according to the different columns of power sources.
As an improved embodiment, the UPS assembly includes: the system comprises a first UPS component for supplying power to the nuclear power plant communication alternating current load equipment, a second UPS component for supplying power to the nuclear power plant communication alternating current load equipment and a third UPS component for supplying power to the nuclear power plant emergency communication alternating current load equipment;
the first alternating current power supply input screen is connected with the first UPS component and the second UPS component; the second alternating current power supply input screen is connected with the first UPS component, the second UPS component and the third UPS component; the alternating current input box is connected with the third UPS assembly;
under a normal working condition, the C-column power supply serves as a standby power supply and supplies power to communication alternating-current load equipment connected with the first UPS assembly and the second UPS assembly through the first alternating-current power supply input screen, the B-column power supply serves as a main power supply and supplies power to communication alternating-current load equipment connected with the first UPS assembly and the second UPS assembly through the second alternating-current power supply input screen, meanwhile, the B-column power supply serves as a standby power supply and supplies power to emergency communication alternating-current load equipment connected with the third UPS assembly through the second alternating-current power supply input screen, and the A-column power supply serves as a main power supply and supplies power to emergency communication alternating-current load equipment connected with the third UPS assembly through the alternating-current input box;
under the working condition of an LOOP accident, the B-column power supply supplies power to two paths of nuclear power plant communication alternating current load equipment and nuclear power plant emergency communication alternating current load equipment which are connected with the first UPS component, the second UPS component and the third UPS component through the second alternating current power supply input screen;
and when the SBO accident condition is met, the A-column power supply supplies power to the emergency communication alternating current load equipment of the nuclear power plant through the alternating current input box.
Under other accident conditions without power loss, the power supply mode of the communication system equipment is the same as that under the normal working condition.
As an improved embodiment, the SBO power supply is also connected with a mobile emergency diesel engine to realize power supply.
It should be noted that: one of the upstream ways of the nuclear power plant communication network center machine room power supply system is led from an SBO power supply, the power supply is taken from an SBO diesel engine and is mounted on a mobile emergency diesel engine after the SBO diesel engine fails, so that the communication system has available communication means under the SBO working condition and the working condition that the SBO diesel engine fails to be connected into the mobile emergency diesel engine. The SBO power supply only powers the communication subsystems associated with the nuclear plant emergency response, rather than all communication subsystems, such that the load requirements of the SBO power supply are minimized.
In summary, in the embodiments of the present invention, by improving the design of the existing nuclear power plant communication power supply system, three different power supplies, namely, a normal power supply, an emergency power supply, and an SBO power supply, are respectively introduced to the upstream of the nuclear power plant communication network center room power supply system, wherein the SBO power supply can also be connected to a mobile emergency diesel engine to realize power supply, and the SBO diesel engine is mounted to the mobile emergency diesel engine after failure, so that the emergency communication system has available communication means under the SBO working condition and under the working condition that the SBO diesel engine is failed and connected to the mobile emergency diesel engine; the input of an upstream power supply is improved, and the two alternating current input screens are respectively connected to a normal power supply and an application power supply, so that the condition that the power supply of most communication systems is lost due to single-point failure is avoided; the input-output relation of the high-frequency switch power supply and the configuration of the alternating current and direct current distribution equipment are further optimized, only one set of the high-frequency switch power supply and the direct current distribution panel are arranged to supply power to the communication system, and the upstream of the high-frequency switch power supply and the direct current distribution panel are directly led from the two alternating current input panels respectively, so that the power supply utilization efficiency and the expansion capability are improved.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A nuclear power plant communication power supply design system, comprising:
the power input assembly comprises a first alternating current power input screen, a second alternating current power input screen and an alternating current input box, wherein the input ends of the power input assembly are respectively connected with a normal power supply of a nuclear power plant C row, an emergency power supply of a nuclear power plant B row and an SBO power supply of a nuclear power plant A row; the power input assembly is used for selectively switching one power supply in three different power supplies in a normal working condition and an accident working condition, wherein the accident working condition comprises an LOOP working condition and an SBO working condition; the UPS component is connected with the power input component and used for supplying power to the nuclear power plant communication AC and DC load equipment and the nuclear power plant emergency communication AC load equipment under the normal or accident working condition; under the LOOP working condition, the UPS component supplies power to all communication AC and DC load equipment and emergency communication AC load equipment; in the SBO working condition, the UPS component only supplies power to emergency communication alternating current load equipment of the nuclear power plant; the LOOP working condition refers to the loss of power supply outside a plant; the SBO working condition refers to a power station supply interruption/whole plant power failure accident;
the output ends of the first alternating current power supply input screen, the second alternating current power supply input screen and the alternating current input box are respectively connected to the UPS component; the UPS component is also used for respectively supplying power to the communication AC load equipment, the communication DC load equipment and the emergency communication AC load equipment of the nuclear power plant connected with the corresponding line of the UPS component according to the different lines of power sources put into the UPS component;
the UPS assembly includes: the system comprises a first UPS component used for supplying power to a nuclear power plant communication alternating current load device, a second UPS component used for supplying power to the nuclear power plant communication alternating current load device and a third UPS component used for supplying power to a nuclear power plant emergency communication alternating current load device;
the first alternating current power supply input screen is connected with the first UPS component and the second UPS component; the second alternating current power supply input screen is connected with the first UPS component, the second UPS component and the third UPS component; the alternating current input box is connected with the third UPS assembly;
under the normal working condition, A, B, C columns of power supplies are connected into a normal power supply to supply power to communication load equipment correspondingly connected with the UPS component through the power supply input component;
under the working condition of an LOOP accident, the power supply of the B column is connected with the emergency diesel engine power supply, and power is respectively supplied to two paths of nuclear power plant communication alternating current load equipment and nuclear power plant emergency communication alternating current load equipment which are connected with the first UPS component, the second UPS component and the third UPS component through the second alternating current power supply input screen;
and when the SBO accident condition is met, the A-row power supply is connected into the SBO diesel engine or the mobile emergency diesel engine, and the power is supplied to the emergency communication alternating current load equipment of the nuclear power plant through the alternating current input box.
2. The communication power supply design system of claim 1, wherein the first UPS element comprises a first UPS cabinet, a first UPS output cabinet, and a first UPS battery pack connected to the first UPS cabinet for providing temporary power when the first UPS cabinet has no power input, the first UPS cabinet being connected to the first ac power input panel, the second ac power input panel, and the first UPS output cabinet, respectively;
the second UPS component comprises a second UPS cabinet, a second UPS output cabinet and a second UPS storage battery pack which is connected with the second UPS cabinet and used for providing temporary power when the second UPS cabinet has no power input, and the second UPS cabinet is respectively connected with the first alternating current power input screen, the second alternating current power input screen and the second UPS output cabinet;
the third UPS component comprises a third UPS cabinet, a third UPS output cabinet and a third UPS storage battery pack which is connected with the third UPS cabinet and used for providing temporary power when the third UPS cabinet has no power input, and the third UPS cabinet is respectively connected with the second alternating current power input screen and the third UPS output cabinet;
under normal or accident working conditions except for SBO working conditions, power can be supplied to the two-way nuclear power plant communication alternating current load equipment and the nuclear power plant emergency communication alternating current load equipment through the first UPS output cabinet, the second UPS output cabinet or the third UPS output cabinet;
and under the SBO working condition, the power is supplied to the emergency communication alternating current load equipment of the nuclear power plant only through the third UPS output cabinet.
3. The communication power supply design system of claim 2, wherein the UPS element further comprises a high frequency switching power supply and a dc distribution board, respectively connected to the first ac power input board and the second ac power input board, for converting ac power into dc power to supply power to the dc load device of the nuclear power plant communication under normal operation or accident operation.
4. The communication power supply design system according to claim 3, wherein a high frequency switching power supply storage battery is connected to the high frequency switching power supply and the direct current distribution board, and the high frequency switching power supply storage battery is used for providing temporary power supply when the high frequency switching power supply and the direct current distribution board have no power supply input.
5. The communication power supply design system of any one of claims 1-4, further comprising a mobile emergency diesel power supply and a switching assembly connected in front of three different individual power supplies in columns A, B and C;
the switch assembly includes: switches MA, MB, MC, M2, M5, M8, M10 connected to the a-column power supply line, switches M3, M6 connected to the C-column power supply line, and switches M4, M7, M9, M11 connected to the B-column power supply line;
when the communication system is in a normal working condition, all power supplies of the A, B, C column can be used by controlling all switches except the switches M5, M6, M7, M10 and M11 to be closed, and all the power supplies can supply power to a normal power supply, an emergency power supply and an SBO power supply of the communication system;
when normal distribution equipment fails and under accident conditions, the switches MA, MB, MC, M2, M3 and M4 are switched off by controlling the switches M5, M6 and M7 to be closed, the states of the other switches are unchanged, the A, B, C-column emergency diesel engine is started, and an emergency power supply and an SBO power supply which are led to the communication system supply power;
when the emergency diesel engine fails, the switches M5, M6 and M7 are controlled to be switched off, the switches M10 and M11 are switched on, the states of the other switches are unchanged, and the SBO diesel engine in the A, B column is started and is led to an SBO power supply of the communication system for supplying power;
and when the SBO diesel engine fails, the mobile emergency diesel engine is accessed, and the SBO power supply led to the communication system can supply power.
6. A method for designing a nuclear power plant communication power supply by using the design system as claimed in any one of claims 1 to 5, the method comprising the steps of:
the upper stream of a power supply system of a central machine room of a nuclear power plant communication network is respectively led from three power supplies of different columns, the power supply system comprises an upper stream power supply which is respectively led from a normal power supply, an emergency power supply and an SBO power supply, the normal power supply, the emergency power supply and the SBO power supply are different columns, and one power supply of the three power supplies of different columns is selected to be switched in under normal working conditions and accident working conditions; supplying power to the nuclear power plant communication alternating current load equipment and the nuclear power plant emergency communication alternating current load equipment when the normal or non-SBO accident condition exists; supplying power to emergency communication alternating current load equipment of the nuclear power plant only under the SBO working condition;
three paths of power supplies in different rows are input into the UPS component through a first alternating current power supply input screen, a second alternating current power supply input screen or an alternating current input box respectively, the input end of the first alternating current power supply input screen is connected with normal power supplies in the row C, the input end of the second alternating current power supply input screen is connected with emergency power supplies in the row B, the input end of the alternating current input box is connected with SBO power supplies in the row A, and the output ends of the first alternating current power supply input screen, the second alternating current power supply input screen and the alternating current input box are connected to different UPS cabinets of the UPS component respectively; the corresponding UPS cabinets respectively supply power to the communication AC load equipment of the nuclear power plant connected with the corresponding rows of the UPS cabinets according to the different rows of the power sources;
the UPS assembly includes: the system comprises a first UPS component for supplying power to the nuclear power plant communication alternating current load equipment, a second UPS component for supplying power to the nuclear power plant communication alternating current load equipment and a third UPS component for supplying power to the nuclear power plant emergency communication alternating current load equipment; the first alternating current power supply input screen is connected with the first UPS component and the second UPS component; the second alternating current power supply input screen is connected with the first UPS component, the second UPS component and the third UPS component; the alternating current input box is connected with the third UPS assembly;
under a normal working condition, the C-column power supply serves as a standby power supply and supplies power to communication alternating-current load equipment connected with the first UPS assembly and the second UPS assembly through the first alternating-current power supply input screen, the B-column power supply serves as a main power supply and supplies power to communication alternating-current load equipment connected with the first UPS assembly and the second UPS assembly through the second alternating-current power supply input screen, meanwhile, the B-column power supply serves as a standby power supply and supplies power to emergency communication alternating-current load equipment connected with the third UPS assembly through the second alternating-current power supply input screen, and the A-column power supply serves as a main power supply and supplies power to emergency communication alternating-current load equipment connected with the third UPS assembly through the alternating-current input box;
under the working condition of an LOOP accident, the B-column power supply supplies power to two paths of nuclear power plant communication alternating current load equipment and nuclear power plant emergency communication alternating current load equipment which are connected with the first UPS component, the second UPS component and the third UPS component through the second alternating current power supply input screen;
when in an SBO accident condition, the A-column power supply supplies power to emergency communication alternating current load equipment of the nuclear power plant through the alternating current input box;
the LOOP working condition refers to the loss of power supply outside a plant; the SBO working condition refers to a power station supply interruption/whole plant power failure accident.
7. The design method of claim 6, wherein the SBO power supply is further connected to a mobile emergency diesel engine for supplying power.
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| CN114157013B (en) * | 2021-10-28 | 2024-01-30 | 中广核研究院有限公司 | Semi-automatic unloading and loading system and method for nuclear power plant |
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