CN220368518U - Hydropower station black start system - Google Patents
Hydropower station black start system Download PDFInfo
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- CN220368518U CN220368518U CN202321570062.7U CN202321570062U CN220368518U CN 220368518 U CN220368518 U CN 220368518U CN 202321570062 U CN202321570062 U CN 202321570062U CN 220368518 U CN220368518 U CN 220368518U
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- 241001672018 Cercomela melanura Species 0.000 title claims abstract description 37
- 238000004146 energy storage Methods 0.000 claims abstract description 23
- 238000002955 isolation Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 230000005284 excitation Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- INFDPOAKFNIJBF-UHFFFAOYSA-N paraquat Chemical compound C1=C[N+](C)=CC=C1C1=CC=[N+](C)C=C1 INFDPOAKFNIJBF-UHFFFAOYSA-N 0.000 description 1
- 210000000352 storage cell Anatomy 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model provides a hydropower station black start system, which comprises: the power supply system comprises a plant power supply, an energy storage battery, a power grid and hydropower station load equipment, wherein the plant power supply is respectively connected with a first circuit breaker and a second circuit breaker; the first circuit breaker is connected with the third circuit breaker; the second circuit breaker is sequentially connected with the rectifier, the inverter, the isolation transformer and the fourth circuit breaker; the third circuit breaker and the fourth circuit breaker are connected with the fifth circuit breaker; the fifth circuit breaker is connected with the sixth circuit breaker; the sixth breaker is connected with a power grid; the energy storage battery is respectively connected with the rectifier and the inverter through a seventh circuit breaker; the station power supply is connected with a power grid through an eighth circuit breaker; the power grid is connected with hydropower station load equipment. The hydropower station black start system provided by the utility model can be used for quickly recovering the normal and stable operation of the power grid in a short time and minimizing the load and economic loss.
Description
Technical Field
The utility model relates to the technical field of hydropower station black start, in particular to a hydropower station black start system.
Background
The black start is that the power grid has extreme fault, after the whole power grid loses power, the power plant with self-starting capability is used for supplying power, and the power supply range is gradually enlarged in a star-fire flaming mode until the normal operation of the whole power grid is restored. The black start is used as a safety guard of the power grid of each country, the power failure loss caused by serious natural disasters can be reduced, and the black start at home and abroad is to use the diesel generator as an alternating current power supply for black start of the unit. The diesel generator is used as a black start alternating current power supply, and the main problem is that when the system is normal, the diesel engine is in a cold standby state, the unit is completely stopped, the diesel generator is restarted, the risk of unsuccessful starting exists, and the daily maintenance management requirement is high.
Therefore, how to quickly recover the normal and stable operation of the power grid in a short time to minimize the load and the economic loss is a problem to be solved by the technicians in the field when the hydropower quick black start test is carried out.
Disclosure of Invention
Therefore, the technical problem to be solved by the utility model is to solve the problem that the diesel generator used as a black start alternating current power supply in the prior art has the risk of unsuccessful start and has higher requirements for daily maintenance and management, thereby providing a hydropower station black start system.
The embodiment of the utility model provides a hydropower station black start system, which comprises: power plant, energy storage battery, power grid and hydropower station load equipment, wherein,
the station power supply is respectively connected with the first circuit breaker and the second circuit breaker; the first circuit breaker is connected with the third circuit breaker; the second circuit breaker is sequentially connected with the rectifier, the inverter, the isolation transformer and the fourth circuit breaker; the third circuit breaker and the fourth circuit breaker are connected with a fifth circuit breaker; the fifth circuit breaker is connected with the sixth circuit breaker; the sixth breaker is connected with the power grid; the energy storage battery is respectively connected with the rectifier and the inverter through a seventh circuit breaker; the plant power supply is connected with the power grid through an eighth breaker; the power grid is connected with the hydropower station load equipment.
Optionally, a hydropower station black start system, the electric network includes: the first unit power supply bus and the second unit power supply bus;
the first unit power bus is connected with the second unit power bus through a bus-bar switch, the first unit power bus is connected with the eighth circuit breaker, and the second unit power bus is connected with the sixth circuit breaker.
Optionally, a hydropower station black start system further includes: a standby power supply;
and the standby power supply is connected with the power supply bus of the second unit through a ninth circuit breaker.
Optionally, the method further comprises: automatic switching-on device of standby power supply;
and the automatic standby power switching device is respectively connected with the eighth circuit breaker and the bus-bar switch.
Optionally, the power grid employs a 0.4kv self-powered bus.
Optionally, the hydropower station load device includes:
speed regulating equipment, exciting equipment, technical water supply and top cover drainage equipment and a main transformer.
Optionally, the speed regulating device includes: and (3) an oil pressing pump.
Optionally, the excitation device includes: cooling fan and start power.
Optionally, the technical water supply and top cover drainage device comprises: technical water supply pump, technical water supply system motorised valve and top cap pump.
Optionally, the main transformer includes: a cooling fan and an oil-submerged pump.
The technical scheme of the utility model has the following advantages:
the embodiment of the utility model provides a hydropower station black start system, which utilizes an energy storage battery to provide a power supply for a part of units (selected black start units) in a hydropower station in the normal operation process, and when a station power source disappears, the power supply of the part of units can be ensured not to be interrupted by storing the power supply, the units can be quickly started in a short time, the station power supply is recovered to supply power to the hydropower station by the station power source, the normal operation of a power grid is ensured, in addition, the change amount of the prior equipment is small, the operation steps of operators are reduced, the start time is saved, and the operation rapidity and reliability are improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a specific example of a black start system of a hydropower station according to an embodiment of the utility model.
In the figure, 1-a factory power supply; 2-an energy storage cell; 3-a power grid; 4-hydropower station load equipment; 5-a first circuit breaker; 6-a second circuit breaker; 7-a third circuit breaker; an 8-rectifier; 9-an inverter; 10-isolation change; 11-fourth circuit breaker; 12-a fifth circuit breaker; 13-sixth circuit breaker; 14-seventh circuit breaker; 15-eighth circuit breaker; 16-a first unit power supply bus; 17-a second unit power supply bus; 18-bus switch; 19-a standby power supply; 20-ninth circuit breaker; 21-automatic switching device of standby power supply; 22-speed regulating equipment; 23-excitation device; 24-technical water supply and top cover drainage equipment; 25-main transformer.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "inner", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, or can be communicated inside the two components, or can be connected wirelessly or in a wired way. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
The utility model provides a hydropower station black start system, as shown in figure 1, a factory power supply 1, an energy storage battery 2, a power grid 3 and hydropower station load equipment 4, wherein,
the plant power supply 1 is respectively connected with a first breaker 5 and a second breaker 6; the first breaker 5 is connected to a third breaker 7; the second circuit breaker 6 is connected with a rectifier 8, an inverter 9, an isolation transformer 10 and a fourth circuit breaker 11 in sequence; the third breaker 7 and the fourth breaker 11 are connected to a fifth breaker 12; the fifth breaker 12 is connected to a sixth breaker 13; the sixth breaker 13 is connected to the electric grid 3; the energy storage battery 2 is connected to the rectifier 8 and the inverter 9 via a seventh breaker 14, respectively; the plant power source 1 is connected with the power grid 3 through an eighth breaker 15; the power grid 3 is connected to the hydropower station load device 4.
Specifically, the electric network 3 adopts a 0.4 Kilovolt (KV) self-power bus, the first circuit breaker 5 is a bypass circuit breaker, the second circuit breaker 6 is an ac input circuit breaker, the fifth circuit breaker 12 is an ac output circuit breaker, and the third circuit breaker 7 and the fourth circuit breaker 11 form a static circuit breaker.
Furthermore, during normal operation, the energy storage battery 2 can be used as an alternating current power supply of part of unit auxiliary equipment, so that the power supply is not interrupted, the energy storage battery 2 provides a power supply for the unit auxiliary equipment, and the energy storage battery 2 with proper capacity is selected as a unit power supply system when a power system breaks down and the unit is stopped completely.
Further, one section of the self-power-consumption terminal of the two sections of the station service motor sets is powered by the station service power source 1, the other section is powered by the energy storage battery 2, and the spare power automatic switching device is normally put into operation.
Specifically, when the power grid 3 is in system breakdown and the machine unit is completely stopped, the energy storage battery 2 is used as a power source for starting the hydropower station, the energy storage battery 2 can ensure that the hydropower station load equipment 4 operates for at least 1 hour, at the moment, a standby machine unit can be directly selected, or a normal machine unit with a stopping process completed can be directly selected, black start is rapidly carried out, plant power is rapidly recovered, and power transmission to the power grid 3 is gradually recovered; the energy storage battery 2 is an operation control power supply in the black start process, is a precondition of normal operation of equipment such as relay protection, operation control, excitation, speed regulation, auxiliary equipment control and the like of a power station, and can ensure long-time normal power supply after a system is crashed.
Further, the hydropower station black start method comprises the following steps: checking whether the standby of the unit to be black started is normal or the unit is stopped normally; checking that parameters of each part of the unit and the main transformer are normal, and if abnormal signals exist, resetting to be normal; checking that the direct current system is normal, switching the power supply of the energy storage battery 2 to the station power supply 1 is normal, and the automatic switching device of the standby power supply is normal in action; the power-on of the power-on transformer group is automatically started; monitoring a starting-up process, and manually assisting in starting up if necessary; and after the power is started normally, gradually recovering the normal mode of the station service, and waiting for the scheduling instruction to recover to supply power to the system.
Furthermore, when the power is small in winter, the number of the power-on stations is small, and after the energy storage battery 2 is utilized, the power consumption of the main transformer for taking the power supply 1 for the plant can be reduced, and the economic benefit is high.
In the embodiment, the energy storage battery is utilized to provide a power supply for a part of units (selected black start units) in the hydropower station in the normal operation process, when the power supply of the plant disappears, the power supply of the part of units can be ensured not to be interrupted by the storage power supply, the units can be quickly started in a short time, the power supply of the plant power supply to the hydropower station is recovered, the normal operation of a power grid is ensured, in addition, the change amount of the existing equipment is small, the operation steps of operators are reduced, the starting time is saved, and the operation rapidity and reliability are improved.
In an alternative embodiment, the above-mentioned electric network 3 comprises: a first unit power supply bus 16 and a second unit power supply bus 17;
the first unit power supply bus 16 (0.4 kV self-powered 1# bus) and the second unit power supply bus 17 (0.4 kV self-powered 2# bus) are connected by a bus bar switch 18, the first unit power supply bus 16 is connected to the eighth circuit breaker 15, and the second unit power supply bus 17 is connected to the sixth circuit breaker 13.
In an alternative embodiment, the method further comprises: a standby power supply 19;
the backup power supply 19 is connected to the second unit power supply bus 17 through a ninth circuit breaker 20.
In an alternative embodiment, the method further comprises: a standby power automatic switching device 21;
the automatic backup power switching device 21 is connected to the eighth circuit breaker 15 and the busbar switch 18, respectively.
In an alternative embodiment, the hydropower station load device 4 includes:
a speed regulating device 22, an exciting device 23, a technical water supply and drainage device 24 and a main transformer 25.
Specifically, the above-mentioned speed regulating device 22 includes: an oil pressing pump; the exciting device 23 includes: a cooling fan and a starting power supply; the above-described technical water supply and top cover drain apparatus 24 includes: a technical water supply pump, a technical water supply system electric valve and a top cover pump; the main transformer 25 includes: a cooling fan and an oil-submerged pump.
The operation of a black start system for a hydroelectric power plant is described below by way of a specific example, as shown in fig. 1.
Example 1:
in normal operation, a 0.4kV self-powered 1# bus is powered by a station service I circuit power supply through CB8, a 0.4kV self-powered 2# bus is powered by a station service II circuit through bypass circuit breakers CB1, static circuit breakers CB3 and energy storage system alternating current circuit breakers CB5 and CB6, CB9 is a standby power supply of the 0.4kV self-powered 2# bus, and an energy storage battery is floatingly charged by a rectifier through CB 7;
when the power grid breaks down and the unit of the hydropower station is completely stopped, the station power source disappears, at the moment, the static circuit breaker CB3 is automatically disconnected, the CB4 is automatically closed, and the 0.4kV self-power-consumption 2# bus is powered by the energy storage battery;
the automatic switching device of the standby power supply acts, the CB8 is disconnected, the busbar switch CB10 is closed, and the 0.4kV self-powered 1# busbar recovers power supply;
because of power grid breakdown, the direct current system can ensure power supply for a short time when the unit is completely stopped, and at the moment, the standby unit or the unit which is stopped normally can be directly subjected to black start operation;
and after the unit is successfully black started, the normal running mode of the station power supply is gradually recovered, and the operation of other units and the line power transmission are recovered.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.
Claims (10)
1. A hydroelectric power station black start system, comprising: power plant, energy storage battery, power grid and hydropower station load equipment, wherein,
the station power supply is respectively connected with the first circuit breaker and the second circuit breaker; the first circuit breaker is connected with the third circuit breaker; the second circuit breaker is sequentially connected with the rectifier, the inverter, the isolation transformer and the fourth circuit breaker; the third circuit breaker and the fourth circuit breaker are connected with a fifth circuit breaker; the fifth circuit breaker is connected with the sixth circuit breaker; the sixth breaker is connected with the power grid; the energy storage battery is respectively connected with the rectifier and the inverter through a seventh circuit breaker; the plant power supply is connected with the power grid through an eighth breaker; the power grid is connected with the hydropower station load equipment.
2. A hydroelectric power black start system according to claim 1, wherein the power grid comprises: the first unit power supply bus and the second unit power supply bus;
the first unit power bus is connected with the second unit power bus through a bus-bar switch, the first unit power bus is connected with the eighth circuit breaker, and the second unit power bus is connected with the sixth circuit breaker.
3. A hydroelectric power black start system according to claim 2, further comprising: a standby power supply;
and the standby power supply is connected with the power supply bus of the second unit through a ninth circuit breaker.
4. A hydroelectric power black start system according to claim 2, further comprising: automatic switching-on device of standby power supply;
and the automatic standby power switching device is respectively connected with the eighth circuit breaker and the bus-bar switch.
5. A hydroelectric power black start system according to claim 1, wherein the grid employs 0.4kv self-power bus bars.
6. A hydroelectric power black start system according to claim 1, wherein the hydroelectric power load device comprises:
speed regulating equipment, exciting equipment, technical water supply and top cover drainage equipment and a main transformer.
7. The black start system of claim 6, wherein the speed regulating device comprises: and (3) an oil pressing pump.
8. The black start system of claim 6, wherein the excitation device comprises: cooling fan and start power.
9. The black start system of claim 6, wherein the technical water supply and roof drain apparatus comprises: technical water supply pump, technical water supply system motorised valve and top cap pump.
10. The black start system of claim 6, wherein the main transformer comprises: a cooling fan and an oil-submerged pump.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321570062.7U CN220368518U (en) | 2023-06-19 | 2023-06-19 | Hydropower station black start system |
| JP2023003335U JP3244543U (en) | 2023-06-19 | 2023-09-12 | Black start system for hydropower plants |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321570062.7U CN220368518U (en) | 2023-06-19 | 2023-06-19 | Hydropower station black start system |
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| Publication Number | Publication Date |
|---|---|
| CN220368518U true CN220368518U (en) | 2024-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321570062.7U Active CN220368518U (en) | 2023-06-19 | 2023-06-19 | Hydropower station black start system |
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|---|---|
| JP (1) | JP3244543U (en) |
| CN (1) | CN220368518U (en) |
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2023
- 2023-06-19 CN CN202321570062.7U patent/CN220368518U/en active Active
- 2023-09-12 JP JP2023003335U patent/JP3244543U/en active Active
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| JP3244543U (en) | 2023-11-10 |
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