CN214626500U - Black start system - Google Patents
Black start system Download PDFInfo
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- CN214626500U CN214626500U CN202120538324.6U CN202120538324U CN214626500U CN 214626500 U CN214626500 U CN 214626500U CN 202120538324 U CN202120538324 U CN 202120538324U CN 214626500 U CN214626500 U CN 214626500U
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Abstract
The utility model relates to a black start system, which comprises a first diesel generator, a second diesel generator, a third diesel generator and a gas unit starting motor; the first diesel generator is connected with the black start section of the 9E unit; the 9E unit black start section is connected with the 9E unit standby section; the 9E unit standby section is connected with a gas unit starting motor; the second diesel generator is connected with the first diesel engine section; the first diesel engine section is connected with the first 9F unit security section and the 9E unit black start section; the third diesel generator is connected with the second diesel engine section; the second diesel engine section is connected with the second 9F unit security section and the 9E unit black start section. Through implementing the utility model discloses above-mentioned embodiment can improve equipment utilization and save the cost.
Description
Technical Field
The invention relates to the technical field of electric power supply and distribution, in particular to a black start system.
Background
The electric power is an important energy source in modern society, the continuous supply of the electric power has very important significance for national economic development and social stability, and in order to avoid the influence caused by large-area power failure accidents and ensure that a unit is reliably stopped when accidents occur and the station service power is lost, generally in a large power plant, a diesel generator for a security power supply is required, and the unit with starting capability can consider to be provided with a black-start diesel generator. In the prior art, the black start diesel generator and the diesel generator for the security power supply are respectively and independently arranged and have lower use frequency, in addition, in order to realize quick black start, the service power loss needs to start the medium-voltage diesel engine to ensure the operation of part of important unit loads of the 9E unit, and the medium-voltage diesel engine has higher manufacturing cost. Therefore, the scheme in the prior art has the problems of low equipment utilization rate and high manufacturing cost.
Disclosure of Invention
The embodiment of the invention provides a black start system, which can simultaneously use the original diesel engine which is only used as a security section power supply as a black start power supply, improve the utilization rate of equipment and reduce the manufacturing cost.
The invention provides a black start system, which comprises a first diesel generator, a second diesel generator, a third diesel generator and a gas turbine set starting motor, wherein the first diesel generator is connected with the second diesel generator through a first diesel generator;
the first diesel generator is connected with the black start section of the 9E unit; the 9E unit black start section is connected with the 9E unit standby section; the 9E unit standby section is connected with the gas unit starting motor;
the second diesel generator is connected with the first diesel section; the first diesel engine section is connected with the first 9F unit security section and the 9E unit black start section;
the third diesel generator is connected with the second diesel engine section; and the second diesel engine section is connected with the second 9F unit security section and the 9E unit black start section.
Further, the method also comprises the following steps: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a ninth switch, a tenth switch, and an eleventh switch;
the first diesel generator is connected with the 9E unit black start section through the first switch;
the 9E unit black start section is connected with the first diesel engine section through the second switch and the third switch;
the 9E unit black start section is connected with the second diesel engine section through the fourth switch and the fifth switch;
the second diesel generator is connected with the first diesel section through the sixth switch;
the first diesel engine section is connected with the first 9F unit security section through the seventh switch and the eighth switch;
the third diesel generator is connected with the second diesel section through the ninth switch;
the second diesel engine section is connected with the second 9F unit security section through the tenth switch and the eleventh switch.
Further, when the first 9F unit security segment detects that the incoming line loop is out of voltage, the sixth switch, the seventh switch and the eighth switch are in a closed state, and the second diesel generator supplies power to the first 9F unit security segment;
when the second 9F unit security section detects that an incoming line loop is in voltage loss, the ninth switch, the tenth switch and the eleventh switch are in a closed state, and the third diesel generator supplies power to the second 9F unit security section;
further, when black start is carried out, the first switch, the second switch, the third switch, the fourth switch and the fifth switch are all in a closed state, and the first diesel generator, the second diesel generator and the third diesel generator are all used as a black start power supply.
Further, the method also comprises the following steps: a twelfth switch, a thirteenth switch and a black start dry type transformer;
the black start section of the 9E unit is connected with the black start dry-type transformer through the twelfth switch; the black-start dry type transformer is connected with the 9E unit standby section through the thirteenth switch;
when black start is performed, the twelfth switch and the thirteenth switch are both in a closed state.
The embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a black start system, which comprises a first diesel generator, a second diesel generator, a third diesel generator and a gas turbine set starting motor, wherein the first diesel generator is connected with the second diesel generator; the first diesel generator is connected with the black start section of the 9E unit; the 9E unit black start section is connected with the 9E unit standby section; the 9E unit standby section is connected with a gas unit starting motor; the second diesel generator is connected with the first diesel engine section; the first diesel engine section is connected with the first 9F unit security section and the 9E unit black start section; the third diesel generator is connected with the second diesel engine section; the second diesel engine section is connected with the second 9F unit security section and the 9E unit black start section. In the scheme, the first diesel generator is communicated with the 9E unit standby section through the 9E unit black start section and serves as a security power supply of the 9E unit standby section, the second diesel generator is communicated with the first 9F unit security section through the first diesel generator section and serves as a security power supply of the first 9F unit security section, and the third diesel generator is communicated with the second 9F unit security section through the second diesel generator section and serves as a security power supply of the second 9F unit security section. When the gas turbine generator set is started in a black mode, the first diesel generator, the second diesel generator and the third diesel generator are communicated with the 9E unit black starting section and then communicated with the 9E unit standby section through the 9E unit black starting section, and the three diesel generators serve as black starting power supplies to supply power to the 9E unit standby section so as to start the gas turbine generator set starting motor. Therefore, the first diesel engine, the second diesel generator and the third diesel generator can be used as a security power supply and a black start power supply, the equipment utilization rate is improved, and the manufacturing cost is saved.
Drawings
Fig. 1 is a system diagram of a black start system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a black start system, which includes a first diesel generator, a second diesel generator, a third diesel generator, and a gas turbine set starting motor (# 1 gas turbine set starting motor in the figure);
the first diesel generator is connected with the black start section of the 9E unit; the 9E unit black start section is connected with the 9E unit standby section; the 9E unit standby section is connected with the gas unit starting motor;
the second diesel generator is connected with the first diesel section; the first diesel engine section is connected with the first 9F unit security section and the 9E unit black start section;
the third diesel generator is connected with the second diesel engine section; and the second diesel engine section is connected with the second 9F unit security section and the 9E unit black start section.
The first diesel generator is communicated with the 9E unit standby section through the 9E unit black start section to serve as a security power supply of the 9E unit standby section, the second diesel generator is communicated with the first 9F unit security section through the first diesel generator section to serve as a security power supply of the first 9F unit security section, and the third diesel generator is communicated with the second 9F unit security section through the second diesel generator section to serve as a security power supply of the second 9F unit security section. When the gas turbine generator set is started in a black mode, the first diesel generator, the second diesel generator and the third diesel generator are communicated with the 9E unit black starting section and then communicated with the 9E unit standby section through the 9E unit black starting section, and the three diesel generators serve as black starting power supplies to supply power to the 9E unit standby section so as to start the gas turbine generator set starting motor. Therefore, the first diesel engine, the second diesel generator and the third diesel generator can be used as a security power supply and a black start power supply, the equipment utilization rate is improved, and the manufacturing cost is saved.
In a preferred embodiment, a first switch #1KO, a second switch #5K6, a third switch #5K5, a fourth switch #6K6, a fifth switch #6K5, a sixth switch #5K0, a seventh switch #5K1, an eighth switch #5K2, a ninth switch #6K0, a tenth switch #6K1, and an eleventh switch #6K2 are further included;
the first diesel generator is connected with the 9E unit black start section through the first switch; the 9E unit black start section is connected with the first diesel engine section through the second switch and the third switch; the 9E unit black start section is connected with the second diesel engine section through the fourth switch and the fifth switch; the second diesel generator is connected with the first diesel generator section through the sixth switch; the first diesel engine section is connected with the first 9F unit security section through the seventh switch and the eighth switch; the third diesel generator is connected with the second diesel section through the ninth switch; the second diesel engine section is connected with the second 9F unit security section through the first time switch and the eleventh switch.
In a preferred embodiment, when the first 9F unit security segment detects that the incoming line circuit is in a voltage loss state, the sixth switch, the seventh switch and the eighth switch are in a closed state, and the second diesel generator supplies power to the first 9F unit security segment;
when the second 9F unit security section detects that an incoming line loop is in voltage loss, the ninth switch, the tenth switch and the eleventh switch are in a closed state, and the third diesel generator supplies power to the second 9F unit security section;
in a preferred embodiment, the first switch, the second switch, the third switch, the fourth switch, and the fifth switch are all in a closed state, and the first diesel generator, the second diesel generator, and the third diesel generator are all used as a black start power source.
In a preferred embodiment, a twelfth switch SK7, a thirteenth switch 60a05, and a black start dry transformer are further included;
the black start section of the 9E unit is connected with the black start dry-type transformer through the twelfth switch; the black-start dry type transformer is connected with the 9E unit standby section through the thirteenth switch;
when black start is performed, the twelfth switch and the thirteenth switch are both in a closed state.
The specific working principle of the system is as follows:
when the second diesel generator and the third diesel generator are used as a security power supply of the 9F unit:
under the normal operating mode: the #5 unit security segment (i.e., the first 9F unit security segment) and the #5 unit working segment a (segment B) supply power, at this time, the switch K53 and the switch #653 (or the switch K54 and the switch #5K4) are in a closed state, the sixth switch #5K0 and the eighth switch #5K2 are in an open state, and the seventh switch #5K1 is in a normally closed state.
The #6 unit security segment (i.e., the second 9F unit security segment) #6 unit operation a segment (B segment) supplies power, at this time, the switch K63 and the switch #6K3 (or the switch K64 and the switch #6K4) are in a closed state, the ninth switch #6K2 and the eleventh switch #6K0 are in an open state, and the tenth switch #6K1 is in a normally closed state.
When switching accidents: when the spare power automatic switching device of the safety section of the #5 unit detects that the bus is in voltage loss, for example: the section B of the #5 unit and the section A of the #5 unit lose power, at the moment, the switches #5K3 and #5K4 are switched off, the eighth switch #5K2 and the sixth switch #5K0 are switched on, the seventh switch #5K1 is in a normally closed state, and the second diesel generator plays a role of a security power supply and supplies power to the security section of the #5 unit. When the spare power automatic switching device of the safety section of the #6 unit detects that the bus is in voltage loss, for example: the section B of the #6 unit and the section A of the #6 unit lose power, at the moment, the switches #6K3 and #6K4 are switched off, the ninth switch #6K0 and the eleventh switch #6K2 are switched on, the tenth switch #6K1 is in a normally closed state, and the third diesel generator plays a role of a security power supply and supplies power to the security section of the #6 unit.
And (3) recovering the mains supply: when the service power recovery of the security segment of the #5 machine needs to quit the power supply of the second diesel generator, the switch K54 and the switch #5K4 (or the switch K53 and the switch #5K3) are closed, the eighth switch #5K2 and the sixth switch #5K0 are opened, and the seventh switch #5K1 is in a normally closed state. When the service power of the security segment of the #6 machine is recovered and the power supply of the second diesel generator needs to be quitted, the switch K64 and the switch #6K4 (or the switch K63 and the switch #6K3) are closed, the ninth switch #6K2 and the eleventh switch #6K0 are opened, and the tenth switch #6K1 is in a normally closed state.
When the first diesel generator is used as a security power supply of the 9E unit:
when the service power system of the 9E unit loses power, the twelfth switch SK7, the thirteenth switch 60A05 and the first switch 1K0 are closed, and the first diesel generator supplies power to important security loads such as a 400V service section of the 9E unit through the standby section of the 9E unit.
When first diesel generator, second diesel generator and third diesel generator regard as 9E unit black start power:
when a large-area power failure occurs in the power grid fault, the 9F/9E combustion engine is stopped, the first diesel generator, the second diesel generator and the third diesel generator are started in a normal automatic mode and used as security power supplies to supply power to important loads such as security sections of the first diesel generator, the second diesel generator and the third diesel generator. At the moment, the 110kV bus voltage is zero, the switch 101, the switch 102, the 6kV auxiliary power 61A01 and 61B01 switches are in the opening positions, and the first switch #1KO, the sixth switch #5K0, the seventh switch #5K1, the eighth switch #5K2, the ninth switch #6K0, the tenth switch #6K1 and the eleventh switch #6K2 are in the closed state;
at this time, the second switch #5K6, the third switch #5K5, the fourth switch #6K6 and the fifth switch #6K5 are closed, so that the second diesel generator and the second diesel generator are connected to a 9E unit black start section; and then, the twelfth switch SK7 and the thirteenth switch 60A05 are closed, so that the first diesel generator, the second diesel generator and the third diesel generator supply power to the 9E unit standby section, the #1 gas unit starting motor (namely the gas unit starting motor) is started through the 9E unit standby section and the frequency converter, and the corresponding high-side breaker is closed after the #1 unit is started, so that the 110kV bus is electrified, namely the switch of the high-side 101 of the #1 unit is closed, and the 110kV bus is confirmed to be electrified.
And (3) switching on a switch at the high-side 102 of the #2 unit, charging a #2 main transformer and a #1 main transformer, switching a 6kV I station power supply and a 6kV IB station power supply after the #1 high station transformer is confirmed to operate normally, confirming that 61A01 and 61B01 are at a switching-on position, and disconnecting a 60A05 switch after 61A02 and 61B02 are at a switching-off position. Therefore, the #1 unit runs with the service island, and black start of the #1 unit is realized.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (5)
1. A black start system, comprising: the system comprises a first diesel generator, a second diesel generator, a third diesel generator and a gas turbine set starting motor;
the first diesel generator is connected with the black start section of the 9E unit; the 9E unit black start section is connected with the 9E unit standby section; the 9E unit standby section is connected with the gas unit starting motor;
the second diesel generator is connected with the first diesel section; the first diesel engine section is connected with the first 9F unit security section and the 9E unit black start section;
the third diesel generator is connected with the second diesel engine section; and the second diesel engine section is connected with the second 9F unit security section and the 9E unit black start section.
2. The black start system of claim 1, further comprising: a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a ninth switch, a tenth switch, and an eleventh switch;
the first diesel generator is connected with the 9E unit black start section through the first switch;
the 9E unit black start section is connected with the first diesel engine section through the second switch and the third switch;
the 9E unit black start section is connected with the second diesel engine section through the fourth switch and the fifth switch;
the second diesel generator is connected with the first diesel generator section through the sixth switch;
the first diesel engine section is connected with the first 9F unit security section through the seventh switch and the eighth switch;
the third diesel generator is connected with the second diesel section through the ninth switch;
the second diesel engine section is connected with the second 9F unit security section through the tenth switch and the eleventh switch.
3. The black start system of claim 2, wherein when the first 9F unit safety section detects a loss of voltage in the incoming line circuit, the sixth switch, the seventh switch, and the eighth switch are in a closed state, and the second diesel generator supplies power to the first 9F unit safety section;
when the second 9F unit security section detects that an incoming line loop is in voltage loss, the ninth switch, the tenth switch and the eleventh switch are in a closed state, and the third diesel generator supplies power to the second 9F unit security section.
4. The black start system according to claim 3, wherein the first switch, the second switch, the third switch, the fourth switch, and the fifth switch are all in a closed state at the time of black start, and the first diesel generator, the second diesel generator, and the third diesel generator are all operated as a black start power source.
5. The black start system of claim 4, further comprising: a twelfth switch, a thirteenth switch and a black start dry type transformer;
the black start section of the 9E unit is connected with the black start dry-type transformer through the twelfth switch; the black-start dry type transformer is connected with the 9E unit standby section through the thirteenth switch;
when black start is performed, the twelfth switch and the thirteenth switch are both in a closed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120538324.6U CN214626500U (en) | 2021-03-15 | 2021-03-15 | Black start system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120538324.6U CN214626500U (en) | 2021-03-15 | 2021-03-15 | Black start system |
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| CN214626500U true CN214626500U (en) | 2021-11-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116073435A (en) * | 2023-03-30 | 2023-05-05 | 西安热工研究院有限公司 | Black start system and method for diesel-engine combined combustion engine |
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2021
- 2021-03-15 CN CN202120538324.6U patent/CN214626500U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116073435A (en) * | 2023-03-30 | 2023-05-05 | 西安热工研究院有限公司 | Black start system and method for diesel-engine combined combustion engine |
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