CN114374264B - Uninterrupted replacement method for plug frame of feed unit of direct current system feed screen - Google Patents
Uninterrupted replacement method for plug frame of feed unit of direct current system feed screen Download PDFInfo
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- CN114374264B CN114374264B CN202111508351.XA CN202111508351A CN114374264B CN 114374264 B CN114374264 B CN 114374264B CN 202111508351 A CN202111508351 A CN 202111508351A CN 114374264 B CN114374264 B CN 114374264B
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- terminal
- direct current
- plug frame
- current system
- power supply
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Classifications
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/015—Boards, panels, desks; Parts thereof or accessories therefor
- H02B1/04—Mounting thereon of switches or of other devices in general, the switch or device having, or being without, casing
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The method for replacing the plug frame of the feed unit of the direct current system without power failure comprises the following steps of firstly, wiring an emergency power supply; step two, using bridging for quick short circuit of the anode and the cathode; step three, disassembling the power supply unit plug frame and the direct current system connection and mechanical connection; and step four, installing a new feeding unit plug frame. Through adopting the terminal row that can bridge to be connected with the feed unit plug frame, the combination of reserve terminal and bridging piece for the feed unit plug frame uses external power source to supply power to the load when changing, and reaches the load end through bridging terminal and does not have a power failure, makes whole operation process operating personnel be uncharged operation through emergency power circuit breaker, bridging piece and plug terminal, and factor of safety improves greatly.
Description
Technical Field
The invention relates to the technical field of maintenance of a direct-current system of a transformer substation, in particular to a method for replacing a power-uninterrupted power supply unit plug frame of a feed screen of a direct-current system.
Background
The direct current system generally provides power for monitoring and action parts such as signal equipment, protection, automatic devices and the like, the normal stable operation of the direct current system is important for the load of the power supply provided by the direct current system, therefore, when the direct current system is designed, two direct current bus power supplies (charging screens) are generally adopted, the direct current bus power supplies are connected through a bus switch (connecting screen), one set of direct current bus power supply breaks down, the load can be connected with the other set of direct current bus through the bus switch to realize continuous power supply, the problem of power supply stability is well solved, but the electric power facilities need to be checked and maintained regularly, and because the direct current bus is continuously electrified, the corresponding charging screens and feeding screens are maintained at high risk, and therefore power failure is often needed to be maintained, and the load end of the power transformation system is greatly damaged.
The feeding unit plug frame is a unit which is directly connected with a direct current load in a feeding screen, such as the feeding screen of a certain direct current system in fig. 11, wherein KK101-KK11110, KK111-KK120, KK121-KK130 and KK1131-KK140 are circuit breakers which are connected with loads on 4 feeding unit plug frames, the feeding unit plug frame is connected with buses through terminal plates, when the direct current system is maintained, the feeding unit plug frame needs to be replaced, a power supply and a connecting wire need to be removed firstly, the plug frame needs to be replaced, the load is powered off in the process, and the load of the direct current system is equipment in a transformer substation, so that the replacement causes the transformer substation to stop running, and the replacement cost is huge.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for replacing a power supply unit plug frame of a direct current system power supply screen without power failure, which can safely replace the power supply unit plug frame under the condition that the direct current system is not powered off.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a direct current system feed screen feed unit inserts frame uninterrupted replacement method, power and load are connected with feed unit inserts the frame through the terminal row, the terminal row adopts but bridging terminal row, be equipped with feed busbar in the feed unit inserts the frame, power busbar KM1+, KM 1-is connected with feed busbar through the terminal row, a plurality of single-phase load circuit breaker inputs in the feed unit inserts the frame are connected with feed busbar electricity, single-phase load circuit breaker output is connected with the terminal row electricity, and single-phase load circuit breaker output is according to positive pole and negative pole segmentation arrangement at the terminal row, the arrangement end of positive pole and negative pole is equipped with at least one reserve terminal, feed unit inserts frame uninterrupted replacement's method does:
step one, connecting spare terminals of a positive electrode and a negative electrode on a terminal block to maintenance emergency terminals (FD 1 < + >) and (FD 1 < - >), wherein emergency power sources are connected to the FD1 < + > and the FD1 < - >;
step two, using two bridge blocks to bridge the spare positive electrode terminal with each positive electrode terminal arrangement on the terminal strip respectively, and bridge the spare negative electrode terminal with each negative electrode terminal arrangement on the terminal strip;
disconnecting the connection of the terminal strip and each single-phase load breaker, disconnecting the connection of the terminal strip and the feed busbar, disconnecting the electrical connection of the original feed unit plug frame and the direct current system, disassembling the mechanical connection of the original feed unit plug frame and the direct current system, and drawing out the original feed unit plug frame;
step four, mounting the feed unit plug frame to be replaced to the removed original feed unit plug frame position, and recovering the connection of each single-phase load breaker and the feed bus with the terminal block according to an original wiring mode;
and step five, disassembling the two bridge blocks installed in the step two, and disconnecting the spare terminals of the positive electrode and the negative electrode on the terminal row in the step one from the maintenance emergency terminals FD1 & lt+ & gt and FD1 & lt- & gt.
In the preferred scheme, in the first step, the maintenance emergency terminals FD1 and FD1 are electrically connected with the emergency power switch 11FQ, when the spare terminals of the positive electrode and the negative electrode are connected with the maintenance emergency terminals FD1 and FD1-, the emergency power switch 11FQ is disconnected, and before the connection of the terminal strip and the original feeding unit plug frame is removed in the third step, the emergency power switch 11FQ is switched on.
In the preferred scheme, the emergency power switch 11FQ adopts the discharging switch of the direct current system 1# storage battery module BAT 1, the direct current system is a two-charge multi-feed direct current system, the 1# storage battery module BAT 1 is connected with the 1# charging screen CHC1 through storage battery buses 1bat+ and 1BAT-, the 1# charging screen CHC1 is provided with a power supply direct current bus KM1+, KM1-, and the 2# charging screen CHC2 is provided with a power supply direct current bus KM2+, KM2-, and the 1# charging screens CHC1 and 2# charging screen CHC2 are connected through a tie switch.
In a preferred embodiment, the spare terminals of the positive electrode and the negative electrode and the repair emergency terminals FD1+ and FD 1-in the first step are connected by using a plug-in terminal X1.
In the preferred scheme, one end of the plug-in terminal X1 is connected with the emergency power switch 11FQ, the emergency power switch 11FQ is connected with the discharging module by using the plug-in terminal X1 when the storage battery discharging switch is used, the other end of the plug-in terminal X1 is connected with the standby terminals of the anode and the cathode, and the plug-in terminal X1 is used as a standby at ordinary times and is connected with the plug-in terminal at the other end when the feeding unit plug frame needs to be replaced.
In the preferred scheme, the upper end of the bridging block is made of insulating plastic, short-circuit sheets are wrapped in the insulating plastic, the short-circuit sheets stretch out of the insulating plastic at intervals to form short-circuit plugs, and the short-circuit plugs are inserted into bridging holes in the terminal rows by using handheld insulating plastic during bridging.
According to the uninterrupted power supply replacement method for the power supply unit plug frame of the direct current system power supply screen, the bridged terminal strip is connected with the power supply unit plug frame, and the standby terminal and the bridging block are combined, so that the power supply unit plug frame supplies power to a load by using an external power supply when in replacement, the uninterrupted power supply of a load end is achieved through the bridging terminal, and operators are in an uninterrupted operation in the whole operation process through the emergency power supply circuit breaker, the bridging block and the plugging-out terminal, and the safety coefficient is greatly improved.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic diagram illustrating the connection of a power feeding unit plug frame according to the present invention;
FIG. 2 is a schematic diagram of the wiring of step one of the method;
FIG. 3 is a schematic diagram of a second step of the method;
FIG. 4 is a schematic drawing showing the disconnection of step three of the method;
FIG. 5 is a schematic diagram of a step-by-step emergency power switch 11FQ in a preferred embodiment;
FIG. 6 is a schematic diagram of a step two emergency power switch 11FQ in a preferred embodiment;
FIG. 7 is a schematic view of the structure of the bridge block in the preferred embodiment;
FIG. 8 is a schematic diagram of a DC system in a preferred embodiment;
fig. 9 is a schematic view of a preferred embodiment of the pluggable terminal X1;
fig. 10 is a schematic structural view of a plug-in terminal X1;
fig. 11 is a schematic layout of a feed screen.
Wherein: the power feeding unit plug frame 1, a power feeding busbar 2, a single-phase load breaker 3, a terminal strip 4, a bridging block 5, insulating plastic 51 and a shorting plug 52.
Detailed Description
As shown in fig. 1-4, in the method for replacing a power supply and load of a power supply screen power supply unit plug frame of a direct current system without power failure, a power supply and load are connected with a power supply unit plug frame 1 through a terminal strip 4, the terminal strip 4 is a bridged terminal strip, a power supply bus bar 2 is arranged in the power supply unit plug frame 1, power supply buses KM1+, KM 1-are connected with the power supply bus bar 2 through the terminal strip 4, the input ends of a plurality of single-phase load circuit breakers 3 in the power supply unit plug frame 1 are electrically connected with the power supply bus bar 2, the output ends of the single-phase load circuit breakers 3 are electrically connected with the terminal strip 4, the output ends of the single-phase load circuit breakers 3 are arranged in sections according to an anode and a cathode at the terminal strip 4, at least one standby terminal is arranged at the arrangement tail ends of the anode and the cathode, and the power supply unit plug frame 1 without power failure is replaced by:
step one, connecting spare terminals of a positive electrode and a negative electrode on a terminal block 4 to maintenance emergency terminals FD1 < + > and FD1 < - >, wherein emergency power supplies are connected to the FD1 < + > and FD1 < - >;
the second step, use two bridge blocks 5 to bridge the spare terminal of positive pole with each positive pole arrangement on the terminal strip 4 separately, the spare terminal of negative pole bridges with each negative pole arrangement on the terminal strip 4, the emergency power supply can supply power to the load after bridging, therefore can disconnect the connection between plug frame 1 of the feed unit and terminal strip 4;
disconnecting the terminal strip 4 from each single-phase load breaker 3, disconnecting the terminal strip 4 from the feed busbar 2, disconnecting the electrical connection between the original feed unit plug frame 1 and the direct current system, disassembling the mechanical connection between the original feed unit plug frame 1 and the direct current system, and drawing out the original feed unit plug frame 1;
step four, mounting the feed unit plug frame 1 to be replaced to the removed position of the original feed unit plug frame 1, and recovering the connection of each single-phase load breaker 3 and the feed bus bar 2 with the terminal block 4 according to an original wiring mode;
step five, the two bridge blocks 5 installed in the step two are disassembled, and the spare terminals of the positive electrode and the negative electrode on the terminal block 4 in the step one are disconnected with the maintenance emergency terminals FD1 & lt+ & gt and FD1 & lt- >
by the operation, through the connection of emergency power supply and spare terminal and bridging between positive and negative terminal, load power supply is converted into emergency power supply by feed unit plug frame 1 earlier, and then demolish the wiring between terminal strip and the feed unit plug frame and can change, whole process load does not have a power failure, and this transformer substation also can not stop work.
In the first step, the maintenance emergency terminals FD1+ and FD 1-are electrically connected to the emergency power switch 11FQ, and when the positive and negative standby terminals are connected to the maintenance emergency terminals FD1+ and FD1-, the emergency power switch 11FQ is turned off, and before the connection between the terminal block 4 and the original power feeding unit plug frame 1 is removed in the third step, the emergency power switch 11FQ is turned on, and the connection is turned off by the emergency power switch 11FQ, so that the live-free operation of the connection can be realized, and the safety of the operator is ensured.
As shown in fig. 8, the emergency power switch 11FQ adopts a discharging switch of a 1# storage battery module BAT 1 of a direct current system, the direct current system is a two-charge multi-feed direct current system, the 1# storage battery module BAT 1 is connected with a 1# charging screen CHC1 through a storage battery bus 1bat+, 1BAT-, the 1# charging screen CHC1 is provided with a power supply direct current bus KM1+, KM1-, and the 2# charging screen CHC2 is provided with a power supply direct current bus KM2+, KM2-, and the 1# charging screen CHC1 and the 2# charging screen CHC2 are connected through a tie switch.
The emergency power switch 11FQ adopts the discharging switch of the 1# storage battery module BATC1 of the direct current system, so that the safety of the power supply during replacement can be fully ensured, firstly, because the discharging current of the storage battery discharging switch is larger than the whole load current of the feeding unit, accidents cannot be caused because the current on-off capability of a circuit breaker is insufficient, the power supply at the two discharging switches is the safest power supply in the whole direct current system, the storage battery power supply and the 1# direct current system bus are used for supplying power, when the 1# direct current system fails and is powered off, the 2# direct current system can be connected through the interconnection switch, and the 2# direct current system is used for supplying power, so that the safety is guaranteed.
The preferred embodiment is shown in fig. 9 and 10, wherein the spare terminals of the positive and negative electrodes and the maintenance emergency terminals FD1+ and FD 1-are connected by the plug-in terminal X1 in the above-described step one.
In a preferred embodiment, as shown in fig. 9, one end of the plug-in terminal X1 is connected to the emergency power switch 11FQ, the emergency power switch 11FQ is connected to the discharging module by using the plug-in terminal X1 when the discharging switch of the storage battery is used, the other end of the plug-in terminal X1 is connected to the spare terminals of the positive electrode and the negative electrode, and is used as a spare at ordinary times, and is connected to the plug-in terminal at the other end when the power supply unit plug-in frame 1 needs to be replaced.
The plug-in terminal X1 is adopted, the terminal can be connected with the positive electrode and the negative electrode standby terminal in advance, one end of the terminal is connected with the emergency power switch 11FQ, namely a storage battery discharging switch in advance, the storage battery switch can be normally used at ordinary times, the plug-in terminal X1 connected with the terminal strip 4 is not electrified at ordinary times, when the feeding unit plug frame 1 needs to be replaced, the two ends of the terminal X1 are plugged together, the bridging block 5 is used for shorting the positive electrode and the negative electrode on the terminal, and the connecting wire of the feeding unit plug frame 1 and the terminal strip 4 can be detached, so that the device is convenient and quick.
The preferable scheme is shown in fig. 7, the upper end of the bridging block 5 is an insulating plastic 51, the insulating plastic 51 is internally wrapped with a short-circuit sheet, the short-circuit sheet extends out of the insulating plastic 51 at intervals to form a short-circuit plug 52, the short-circuit plug 52 is inserted into a bridging hole on the terminal strip 4 by holding the insulating plastic 51 during bridging, and the operation is a pulling-inserting operation, so that the method is convenient, quick and safe.
Claims (6)
1. The utility model provides a method for power-uninterrupted replacement of feed unit plug frame of direct current system feed screen, a serial communication port, power and load are connected with feed unit plug frame (1) through terminal bar (4), terminal bar (4) adopt can bridge the terminal bar, be equipped with feed busbar (2) in feed unit plug frame (1), power busbar KM1+, KM 1-is connected with feed busbar (2) through terminal bar (4), a plurality of single-phase load circuit breaker (3) input in feed unit plug frame (1) are connected with feed busbar (2) electricity, single-phase load circuit breaker (3) output is connected with terminal bar (4) electricity, and single-phase load circuit breaker (3) output is according to anodal and negative pole segmentation arrangement at terminal bar (4), anodal and negative pole arrange the end and be equipped with at least one reserve terminal, feed unit plug frame (1) does not have a power failure and changes the method that:
step one, connecting spare terminals of a positive electrode and a negative electrode on a terminal block (4) to maintenance emergency terminals (FD 1 < + >) and (FD 1 < - >), wherein emergency power sources are connected to the FD1 < + > and FD1 < - >;
step two, using two bridge blocks (5) to respectively bridge the spare positive electrode terminals with all the positive electrode terminal arrangements on the terminal strip (4), and bridge the spare negative electrode terminals with all the negative electrode terminal arrangements on the terminal strip (4);
disconnecting the terminal strip (4) from each single-phase load breaker (3), so as to disconnect the terminal strip (4) from the feed busbar (2), disconnect the electrical connection between the original feed unit plug frame (1) and the direct current system, disassemble the mechanical connection between the original feed unit plug frame (1) and the direct current system, and withdraw the original feed unit plug frame (1);
step four, mounting the feed unit plug frame (1) to be replaced to the removed position of the original feed unit plug frame (1), and recovering the connection of each single-phase load breaker (3) and the feed bus bar (2) with the terminal bar (4) according to an original wiring mode;
and step five, disassembling two bridging blocks (5) arranged in the step two, and disconnecting the spare terminals of the positive electrode and the negative electrode on the terminal block (4) in the step one from the maintenance emergency terminals FD1 & lt+ & gt and FD1 & lt- & gt.
2. The method for replacing a power supply unit plug frame of a direct current system according to claim 1, wherein in the first step, the maintenance emergency terminals FD1+ and FD 1-are electrically connected to the emergency power switch 11FQ, and when the spare terminals of the positive electrode and the negative electrode are connected to the maintenance emergency terminals FD1+ and FD1-, the emergency power switch 11FQ is turned off, and before the connection of the terminal block (4) and the original power supply unit plug frame (1) is removed in the third step, the emergency power switch 11FQ is turned on.
3. The method for replacing the power supply frame of the power supply unit of the direct current system according to claim 2, wherein the emergency power switch 11FQ adopts a discharging switch of a 1# storage battery module BATC1 of the direct current system, the direct current system is a two-charge multi-feed direct current system, the 1# storage battery module BATC1 and the 1# charging screen CHC1 are connected through storage battery buses 1BAT and 1BAT-, the 1# charging screen CHC1 is provided with a power supply direct current bus KM1+, KM1-, and the 2# charging screen CHC2 is provided with a power supply direct current bus KM2+, KM2-, and the 1# charging screen CHC1 and the 2# charging screen CHC2 are connected through a connecting switch.
4. The method for replacing a power supply unit plug frame of a power supply screen of a direct current system according to claim 3, wherein the spare terminals of the positive electrode and the negative electrode in the first step are connected with the maintenance emergency terminals FD1+ and FD 1-by using plug terminals X1.
5. The method for replacing a power supply unit plug frame of a direct current system according to claim 4, wherein the first end of the plug-in terminal X1 is connected to the emergency power switch 11FQ, the first end of the emergency power switch 11FQ is connected to the discharging module by using the plug-in terminal X1 when the discharging switch of the storage battery is used, the second end of the plug-in terminal X1 is connected to the spare terminals of the positive electrode and the negative electrode, and is used as a spare when the power supply unit plug frame (1) needs to be replaced, and is connected to the first end of the plug-in terminal X1.
6. The method for replacing the plug frame of the power supply unit of the direct current system feeder screen according to claim 1, wherein the upper end of the bridging block (5) is provided with insulating plastic (51), short-circuit sheets are wrapped in the insulating plastic (51), the short-circuit sheets extend out of the insulating plastic (51) at intervals to form a short-circuit plug (52), and the short-circuit plug (52) is inserted into a bridging hole on the terminal block (4) by holding the insulating plastic (51) during bridging.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111508351.XA CN114374264B (en) | 2021-12-10 | 2021-12-10 | Uninterrupted replacement method for plug frame of feed unit of direct current system feed screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111508351.XA CN114374264B (en) | 2021-12-10 | 2021-12-10 | Uninterrupted replacement method for plug frame of feed unit of direct current system feed screen |
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| CN114374264B true CN114374264B (en) | 2023-08-08 |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN114374264A (en) | 2022-04-19 |
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