CN210404841U - Novel power supply system for hydropower station in black start - Google Patents
Novel power supply system for hydropower station in black start Download PDFInfo
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- CN210404841U CN210404841U CN201921623829.1U CN201921623829U CN210404841U CN 210404841 U CN210404841 U CN 210404841U CN 201921623829 U CN201921623829 U CN 201921623829U CN 210404841 U CN210404841 U CN 210404841U
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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
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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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
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Abstract
The utility model relates to a power station technical field, specifically speaking relates to a novel power station black start electrical power generating system, including the power station that needs island operation, the power station is provided with the station service electrical system, the station service is become by two voltage levels of 400V and 10kV, 10kV system is by 10kV I, II, III, IV section and V section spare generating line are constituteed, the 400V system is by security personnel's load, the unit is from loads such as power consumption to constitute, the station service electrical system is provided with black start electrical power generating system, black start electrical power generating system is by diesel generator, low pressure vacuum circuit breaker, 10kV rises to press and changes, 400V three-phase enclosed bus, 10kV cable and high tension switchgear unit take the branch to connect. The application of the black-start power supply system solves the problems that when the black-start power supply system of the existing hydropower station is started, a 400V security load needs to be transmitted to a 10kV bus reversely, a plurality of operating devices are needed, a power supply program is complex, the black-start response speed is low, safety accidents are easily caused by misoperation, and the like, and simultaneously solves the problem that when the hydropower station runs in an isolated island, a standby power supply does not exist.
Description
Technical Field
The utility model relates to a power station technical field specifically is a novel power station black start electrical power generating system.
Background
With the continuous improvement of the black start response requirements of the power grid on the hydropower station, the black start time of the existing hydropower station black start power supply system is long, and sometimes even 1 hour and more than 30 minutes are needed. The current wiring mode of the black start power supply system is as follows: the diesel generator is connected to a 400V security load, the 400V security load is reversely transmitted to a 10kV station service I section and a 10kV station service III section through voltage boosting transformation, and then the 400V unit self-service power, public power, illumination power and other power utilization equipment are supplied with power through 10kV station service subsection or interconnection operation. According to the wiring mode, when the power supply is started in black, the 400V security load transmits power to the 10kV system, corresponding 400V and 10kV circuit breaker protection constant value and locking logic need to be modified temporarily before black start operation, and when the power supply is started in black, the related equipment operation is more, the power supply program is very complex, the black start response speed under emergency is seriously influenced, and great hidden dangers are left for the operation and safety production of a power plant.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a novel power supply system is started to power station blackout to solve certain or some defects that propose in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a novel hydropower station black start power supply system comprises a hydropower station operating in an island manner, wherein the hydropower station is provided with a service power system, the service power is divided into two-stage voltage of 400V and 10kV, the 10kV service power system consists of 10kV I, II, III, IV and V sections of standby buses, an interconnection switch is arranged between each section of the 10kV I-V section bus, the 400V station power system consists of a security load and a unit self-power load, the plant power system is provided with a black start power system, the power supply of the black start power system is a diesel generator, the diesel generator is connected with a 400V vacuum circuit breaker through a 400V common box bus, the 400V vacuum circuit breaker is connected with a 10kV boosting transformer through the 400V common box bus, the 10kV boosting transformer is characterized in that a 10kV cable is connected into a 10kV V section standby bus through a 10kV switch in one loop, and the other loop is connected into a 10kV I section bus.
Preferably, the black start power supply system is operated by starting a diesel generator, switching on a 400V vacuum circuit breaker, switching on a 10kV boosting high-voltage side connection 10kV V section switch, switching on connection switches of a 10kV V section and 10kV I, II, III and IV sections when the black start is performed, switching on a 10kV I, II, III and IV section to 400V 1-4 section self-power-consumption feeder switch when the black start is performed, and starting the unit after self-power consumption is performed.
Preferably, the 10kV section V is a spare bus, contact switches are arranged on the 10kV sections I, II, III and IV respectively, the 10kV sections I, II, III and IV are connected to 400V self-power of each unit respectively, and the 10kV section V is provided with an external power supply.
Preferably, the connection mode of the black start power supply system is a unit branched connection mode, specifically, a diesel generator is used as a power supply, a 400V vacuum circuit breaker is connected through a 400V common box bus, a 10kV boosting transformer is connected through the 400V common box bus, and a 10kV cable for the 10kV boosting transformer is respectively connected into a 10kV V section spare bus and a 10kV I section bus through a 10kV switch.
Preferably, a 400V-10kV boosting transformer and a 400V bus set are additionally arranged at an outlet of the diesel generator, the bus is connected to the low-voltage side of the 400V-10kV boosting transformer from the outlet of the diesel generator, and a 10kV cable to 10kV station service V-section standby circuit breaker and a 10kV I-section standby circuit breaker are respectively connected to the high-voltage side of the 400V-10kV boosting transformer.
Preferably, the 10kV cable has a cross-sectional area of 3 x 50mm2。
Preferably, the capacity of the 400V-10kV boosting transformer is 2000kVA, and the rated current of the 400V bus is 3200A.
Compared with the prior art, the beneficial effects of the utility model are that:
1. this novel power station black start electrical power generating system explores and simplifies power station black start electrical power generating system wiring and operation flow through the house service wiring research to the power station, realizes simultaneously with this black start electrical power generating system as stand-by power supply when island operation, establishes one set of wiring simply, and operating logic is clear, and the response is quick, can regard as independent reserve power simultaneously under the island operational aspect, realizes resource rational utilization, practices thrift the investment.
2. This novel power station black start electrical power generating system simplifies power station black start electrical power generating system's wiring, will no longer need modify circuit breaker protection definite value and shutting logic temporarily before the black start operation, equipment operation reduces during black start, the operation flow simplifies, and simultaneously, the application of this system can satisfy the stand-by power supply demand under black start and the multiple mode of island operation, need not newly-increased extra stand-by power generating system, can effectively practice thrift the investment of power station on stand-by power generating system, reduce the space simultaneously and occupy.
3. This novel power supply system that blackstart in power station adopts 400V diesel generator as the power of this set of system, through 400V export circuit breaker, through step up become after stepping up with 10kV house service V section generating line pass through 10kV high tension switchgear and be connected, step up simultaneously and become the high-pressure side and draw forth branch's wiring and be connected with I section house service generating line of 10 kV. When the diesel generator is normally and black started, the diesel generator is directly connected with 10kV I, II, III and IV section buses through the 10kV V section bus, self power is supplied to the corresponding black start unit respectively, so that quick black start is realized, when an island operates, the 10kV V section bus is operated by external power supply 10kV III and IV section station power, the 10kV I and II section operate through high station-level power supply by the 1 # unit substation, at the moment, the black start power system can be used as an independent backup power system, and corresponding load can be rapidly borne when the external power supply or the 1 # unit fails due to power failure.
Drawings
FIG. 1 is a schematic circuit diagram of the 10kV I section of the present invention;
FIG. 2 is a schematic circuit diagram of the 10kV section II of the present invention;
fig. 3 is a schematic circuit diagram of the 10kV section iii of the present invention;
FIG. 4 is a schematic circuit diagram of the section IV of 10kV of the present invention;
fig. 5 is a schematic circuit diagram of the 10kV v section of the present invention;
fig. 6 is a schematic circuit diagram of the safety load electricity utilization of the present invention;
FIG. 7 is a wiring diagram of 10kV I section of the present invention;
FIG. 8 is a wiring diagram of the 10kV II section of the present invention;
FIG. 9 is a wiring diagram of 10kV section III of the present invention;
FIG. 10 is a wiring diagram of the 10kV IV section of the present invention;
fig. 11 is a wiring diagram of the 10kV v section of the present invention;
fig. 12 is a wiring diagram of the safety load electricity and the unit electricity of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-12, the present invention provides the following technical solutions:
a novel hydropower station black start power supply system comprises a hydropower station operating in an isolated island, the hydropower station is provided with a station electric system, the station electric system is divided into 400V and 10kV two-stage voltage, the 10kV station electric system consists of 10kV I, II, III, IV sections and V sections of standby buses, a contact switch is arranged between each section of the 10kV I-V sections of the buses, the 400V station electric system consists of a security load and a unit self-power load, the station electric system is provided with a black start power supply system, the power supply of the black start power supply system is a diesel generator, the diesel generator is connected into a 400V vacuum circuit breaker through a 400V common box bus, the 400V vacuum circuit breaker is connected into a 10kV boosting transformer through the 400V common box bus, a 10kV boosting transformer 10kV cable is connected into the 10V section of standby bus through a 10kV switch, the other circuit is connected into the 10kV I section of the kV bus, and the research on the station electric connection, the method has the advantages that wiring and operation processes of the hydropower station black start power supply system are explored and simplified, the black start power supply system is used as a standby power supply when an island operates, a set of wiring is simple to establish, operation logic is clear, response is fast, and meanwhile the black start power supply system can be used as an independent standby power supply under the island operation condition, so that reasonable utilization of resources is realized, and investment is saved.
Furthermore, the black start power supply system is operated in a mode of starting a diesel generator, a 400V vacuum circuit breaker is switched on, a 10kV boosting high-voltage side is connected with a 10kV V section switch, the connection switch of the 10kV V section and 10kV I, II, III and IV sections is switched on when the black start is carried out, a 10kV I, II, III and IV section to 400V 1-4 section machine self-power-consumption feeder switch is switched on when the black start is carried out, the machine set is started after self-power consumption, the 10kV V section is powered by the diesel generator when the normal black start is carried out, and when a hydropower station is operated in an isolated island mode, the black start power supply system is used as a standby power supply and can be respectively operated from the 10kV I section with 10kV or II section or from the 10kV V section with 10kV III and IV section.
Specifically, the 10kV section V is a spare bus, contact switches are arranged on the 10kV sections I, II, III and IV respectively, the 10kV sections I, II, III and IV are connected to 400V of each unit for self power consumption respectively, and the 10kV section V is provided with an external power supply.
It is worth to say that the wiring mode of black start power supply system is that the unit takes the branch to work a telephone switchboard, specifically is diesel generator as the power, inserts 400V vacuum circuit breaker through 400V total box generating line, and then inserts 10kV voltage boost through 400V total box generating line, and 10kV voltage boost becomes and inserts 10kV V section spare generating line and 10kV I section generating line respectively through 10kV switch with 10kV cable.
In addition, a 400V-10kV boosting transformer and a 400V bus are additionally arranged at the outlet of the diesel generator, the bus is connected to the low-voltage side of the 400V-10kV boosting transformer from the outlet of the diesel generator, and a 10kV cable to a 10kV auxiliary V-section standby circuit breaker and a 10kV I-section standby circuit breaker are respectively connected to the high-voltage side of the 400V-10kV boosting transformer. 10kV cable cross-sectional area 3 x 50mm2. The capacity of the 400V-10kV boosting transformer is 2000kVA, and the rated current of a 400V bus is 3200A.
The novel power supply system that starts is blacked in power station of this embodiment, 400V diesel generator pass through 400V export circuit breaker as the power of this set of system, through step up become after stepping up with 10kV house service V section generating line pass through 10kV high tension switchgear and be connected, step up simultaneously and become the high-pressure side and draw forth branch's wiring and be connected with I section house service generating line of 10 kV. When the diesel generator is normally and black started, the diesel generator is directly connected with 10kV I, II, III and IV section buses through the 10kV V section bus, self power is supplied to the corresponding black start unit respectively, so that quick black start is realized, when an island operates, the 10kV V section bus is operated by external power supply 10kV III and IV section station power, the 10kV I and II section operate through high station-level power supply by the 1 # unit substation, at the moment, the black start power system can be used as an independent backup power system, and corresponding load can be rapidly borne when the external power supply or the 1 # unit fails due to power failure.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides a novel power supply system that black start in power station which characterized in that: including the power station of island operation, the power station is provided with the station service electrical system, the station service is divided into 400V and 10kV two-stage voltage, 10kV station service electrical system comprises 10kV I, II, III, IV section and V section reserve generating line, be equipped with the contact switch between 10kV I to V section generating line each section, 400V station service electrical system comprises security load, unit self-service electric load, the station service electrical system is provided with black start power supply system, black start power supply system power is diesel generator, diesel generator inserts 400V vacuum circuit breaker through 400V total case generating line, 400V vacuum circuit breaker inserts 10kV through 400V total case generating line and steps up and become, 10kV steps up and becomes to use 10kV cable and inserts 10kV V section reserve generating line through 10kV V switch one-back, and another one-back inserts 10kV I section generating line.
2. The novel black start power supply system for a hydroelectric power plant of claim 1, wherein: the black start power supply system is operated in a mode that a diesel generator is started, a 400V vacuum circuit breaker is closed, a 10kV boosting high-voltage side is connected with a 10kV V section switch, the 10kV V section and 10kV I, II, III and IV section connection switches are closed when black start is performed, 10kV I, II, III and IV sections to 400V 1-4 unit self-power-consumption feeder switches are closed when black start is performed, and the unit is started after self-power consumption is performed.
3. The novel black start power supply system for a hydroelectric power plant of claim 2, wherein: the 10kV V section is a spare bus, contact switches are arranged on the 10kV I section, the 10kV II section, the 10kV III section and the 10kV IV section respectively, the 10kV I section, the 10kV II section, the 10kV III section and the 10kV V section are connected to 400V of each unit for self power utilization, and the 10kV V section is provided with an external power supply.
4. The novel black start power supply system for a hydroelectric power plant of claim 3, wherein: the wiring mode of the black start power supply system is that the unit is provided with branch wiring, specifically, a diesel generator is used as a power supply, a 400V vacuum circuit breaker is connected into a 400V common box bus, then a 10kV boosting transformer is connected into the 400V common box bus, and a 10kV boosting transformer is respectively connected into a 10kV V section spare bus and a 10kV I section bus through a 10kV switch by using a 10kV cable.
5. The novel black start power supply system for a hydroelectric power plant of claim 4, wherein: A400V-10 kV boosting transformer and a 400V bus are additionally arranged at an outlet of the diesel generator, the bus is connected to the low-voltage side of the 400V-10kV boosting transformer from the outlet of the diesel generator, and a 10kV cable to a 10kV auxiliary V-section standby circuit breaker and a 10kV I-section standby circuit breaker are respectively connected to the high-voltage side of the 400V-10kV boosting transformer.
6. The novel black start power supply system for a hydroelectric power plant of claim 5, wherein: the cross-sectional area of the 10kV cable is 3 x 50mm2。
7. The novel black start power supply system for a hydroelectric power plant of claim 5, wherein: the capacity of the 400V-10kV boosting transformer is 2000kVA, and the rated current of the 400V bus is 3200A.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921623829.1U CN210404841U (en) | 2019-09-27 | 2019-09-27 | Novel power supply system for hydropower station in black start |
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| CN201921623829.1U CN210404841U (en) | 2019-09-27 | 2019-09-27 | Novel power supply system for hydropower station in black start |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113555898A (en) * | 2021-07-12 | 2021-10-26 | 北京华鼎电源集团有限公司 | Island black start mode of high-voltage gas generator set |
| CN114094635A (en) * | 2021-11-17 | 2022-02-25 | 广东电网有限责任公司 | Black start system and method for small hydropower microgrid |
| CN116565961A (en) * | 2023-07-07 | 2023-08-08 | 华能澜沧江水电股份有限公司 | One-key starting control method and system for diesel generator with station service bus of hydropower station |
-
2019
- 2019-09-27 CN CN201921623829.1U patent/CN210404841U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113555898A (en) * | 2021-07-12 | 2021-10-26 | 北京华鼎电源集团有限公司 | Island black start mode of high-voltage gas generator set |
| CN113555898B (en) * | 2021-07-12 | 2023-10-24 | 北京华鼎电源集团有限公司 | Island black starting method of high-pressure gas generator set |
| CN114094635A (en) * | 2021-11-17 | 2022-02-25 | 广东电网有限责任公司 | Black start system and method for small hydropower microgrid |
| CN114094635B (en) * | 2021-11-17 | 2023-08-25 | 广东电网有限责任公司 | Black-start system and method for small hydropower micro-grid |
| CN116565961A (en) * | 2023-07-07 | 2023-08-08 | 华能澜沧江水电股份有限公司 | One-key starting control method and system for diesel generator with station service bus of hydropower station |
| CN116565961B (en) * | 2023-07-07 | 2023-09-08 | 华能澜沧江水电股份有限公司 | One-key starting control method and system for diesel generator with station service bus of hydropower station |
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