CN112803579A - Complementary system and method for auxiliary power supply and security power supply of new energy power station and thermal power plant - Google Patents
Complementary system and method for auxiliary power supply and security power supply of new energy power station and thermal power plant Download PDFInfo
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- CN112803579A CN112803579A CN202110154914.3A CN202110154914A CN112803579A CN 112803579 A CN112803579 A CN 112803579A CN 202110154914 A CN202110154914 A CN 202110154914A CN 112803579 A CN112803579 A CN 112803579A
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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
- H02J9/062—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 for AC powered loads
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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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
- H02J9/08—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 requiring starting of a prime-mover
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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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/20—Climate change mitigation technologies for sector-wide applications using renewable energy
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a system and a method for complementing factory power and security power of a new energy power station and a thermal power plant, which comprises a factory transformer, a factory power bus, a wind generating set grid-connected switch, a wind power photovoltaic power station bus, a photovoltaic generating set grid-connected switch, a wind power photovoltaic power station outlet switch, a wind power photovoltaic power station inlet switch, a factory power security power supply working power switch, a three-power-supply-system switching switch, a factory power security power supply standby power switch and a security section bus.
Description
Technical Field
The invention belongs to the technical field of new energy power stations and thermal power plant systems, and relates to a system and a method for complementing station power and security power supplies of new energy power stations and thermal power plants.
Background
With the increase of electricity demand and the large development of new energy bases, the power generation and the remote transmission of large-scale energy bases form an important form of power supply in China. However, with the rapid increase of the installed capacity of a new energy power station, the outward delivery or the absorption meets the bottleneck, and the phenomena of large-scale wind abandonment and light abandonment are caused. The power consumption rate of the thermal power plant is usually between 5% and 6%, that is, about 5% to 6% of the power generated by steam generated by coal combustion and pushing a turbonator is consumed by the load of the thermal power plant. On one hand, the generated energy of a large amount of new energy power stations is wasted, and on the other hand, the use of fossil energy such as coal causes serious resource and environmental problems.
The security power supply system of the thermal power plant is generally designed to be provided with working power supply by self station service power, the standby power supply is only provided by the diesel generator, but when the station service power is lost, if the diesel generator also breaks down or has a load problem and can not normally work, the security power supply system faces the risk of power failure, and the safety of the unit can be greatly influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a system and a method for complementing the service power and the security power supply of a new energy power station and a thermal power plant.
In order to achieve the purpose, the system for complementing the service power and the security power supply of the new energy power station and the thermal power plant comprises a service transformer, a service bus, a wind generating set grid-connected switch, a wind power photovoltaic power station bus, a photovoltaic generating set grid-connected switch, a wind power photovoltaic power station outlet switch, a wind power photovoltaic power station inlet switch, a service security power supply working power supply switch, a three-power supply system change-over switch, a service security power supply standby power supply switch and a security section bus;
the output end of the service transformer is connected with a service bus, the wind generating set is connected with a wind power photovoltaic power station bus through a wind generating set grid-connected switch, the photovoltaic generating set is connected with the wind power photovoltaic power station bus through a photovoltaic generating set grid-connected switch, and the service bus is connected with the service bus through a wind power photovoltaic power station outlet switch and a wind power photovoltaic power station inlet switch;
the service bus is connected with the first input end of the three-power-supply-system change-over switch through the service safety power supply working power supply switch, the wind power photovoltaic power station bus is connected with the second input end of the three-power-supply-system change-over switch through the service safety power supply standby power supply switch, the diesel generator is connected with the third input end of the three-power-supply-system change-over switch, and the output end of the three-power-supply-system change-over switch is connected with the safety section bus.
The wind generating set is connected with a wind power photovoltaic power station bus through a wind generating set step-up transformer and a wind generating set grid-connected switch.
The photovoltaic generator set is connected with a wind power photovoltaic power station bus through the photovoltaic generator set voltage boosting transformer and the photovoltaic generator set grid-connected switch.
The service bus is connected with the first input end of the three power system change-over switch through the service security power supply working power supply switch and the security power supply working transformer.
And the wind power photovoltaic power station bus is connected with the second input end of the three power system change-over switch through a service safety power supply standby power switch and a safety power supply standby transformer.
A method for complementing station service power and security power supplies of a new energy power station and a thermal power plant comprises the following steps:
1) after the service transformer is electrified, closing a service bus incoming line switch, and electrifying the service bus;
2) closing a wind power photovoltaic power station outlet switch, closing a wind power photovoltaic power station inlet switch, and electrifying a wind power photovoltaic power station bus;
3) after the rotating speed of blades in the wind generating set reaches an output power condition, an excitation power supply starts to excite, the wind generating set starts to output power, when the output voltage of the wind generating set reaches a grid-connected condition, the output voltage is merged into a bus of a wind power photovoltaic power station through a grid-connected switch of the wind generating set, and the wind generating set normally supplies power to station service; the method comprises the following steps that after a solar panel of a photovoltaic generator set generates electric energy, voltage is built, when the output voltage of the photovoltaic generator set reaches a grid-connected condition, the output voltage is merged into a bus of a wind power photovoltaic power station through a grid-connected switch of the photovoltaic generator set, and the photovoltaic generator set normally supplies power to service power;
when wind power is insufficient and the rotating speed of blades in the wind generating set cannot maintain the output power condition, disconnecting a grid-connected switch of the wind generating set; when the solar panel of the photovoltaic generator set cannot generate enough electric energy, the grid-connected switch of the photovoltaic generator set is disconnected;
4) closing a working power switch of the service safety power supply and closing a standby power switch of the service safety power supply;
5) when the station service is normal, the three power supply system change-over switches select the working power supply of the station service security power supply to supply power, so that the security section bus is electrified;
when the service power is lost, the incoming line switch of the wind power photovoltaic power station is automatically disconnected, the diesel generator is started, whether the output voltage of the emergency power supply standby transformer is normal or not is judged, when the output voltage of the emergency power supply standby transformer is normal, the step 6) is carried out, and otherwise, the step 7) is carried out;
6) the three power system change-over switches select to be switched into a security power standby transformer for power supply, and a security section bus is electrified;
7) after the voltage of the diesel generator is successfully built, the three power supply system change-over switches are selected to switch in the diesel generator to supply power, and the bus of the security section is electrified.
The invention has the following beneficial effects:
according to the system and the method for complementing the service power of the new energy power station, the service power of the thermal power plant and the security power supply, during specific operation, the new energy power station is connected into the service power supply of the thermal power plant, and meanwhile, the new energy power station is used as a standby power supply of the security power supply of the thermal power plant, so that the service power rate of the thermal power plant is effectively reduced, the economic benefit of the thermal power plant is improved, the resource waste of wind and light abandonment is reduced, and the reliability and the safety of the security power supply of the thermal power plant are improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a flow chart of the present invention.
The system comprises a transformer 1, a wind generating set 2, a photovoltaic generating set 3, a wind generating set step-up transformer 4, a photovoltaic generating set step-up transformer 5, a wind generating set grid-connected switch 6, a photovoltaic generating set grid-connected switch 7, a service bus 8, a wind photovoltaic power station bus 9, a wind photovoltaic power station incoming switch 10, a service bus incoming switch 11, a wind photovoltaic power station outgoing switch 12, a service safety power supply working power switch 13, a service safety power supply standby power supply switch 14, a safety power supply working transformer 15, a safety power supply standby transformer 16, a diesel generator 17, a three-power-supply-system transfer switch 18 and a safety-section bus 19.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the system for complementing the service power and the security power of the new energy power station and the thermal power plant comprises a service transformer 1, a service bus 8, a wind generating set 2, a wind generating set grid-connected switch 6, a wind power photovoltaic power station bus 9, a photovoltaic generating set 3, a photovoltaic generating set grid-connected switch 7, a wind power photovoltaic power station outlet switch 12, a wind power photovoltaic power station inlet switch 10, a service security power working power switch 13, a three-power system change-over switch 18, a service security power standby power switch 14 and a security section bus 19; the output end of the service transformer 1 is connected with a service bus 8, the wind generating set 2 is connected with a wind power photovoltaic power station bus 9 through a wind generating set grid-connected switch 6, the photovoltaic generating set 3 is connected with the wind power photovoltaic power station bus 9 through a photovoltaic generating set grid-connected switch 7, and the service bus 8 is connected with the service bus 8 through a wind power photovoltaic power station outgoing switch 12 and a wind power photovoltaic power station incoming switch 10; the service bus 8 is connected with the first input end of the three-power-supply-system change-over switch 18 through the service security power supply working power supply switch 13, the wind power photovoltaic power station bus 9 is connected with the second input end of the three-power-supply-system change-over switch 18 through the service security power supply standby power supply switch 14, the diesel generator 17 is connected with the third input end of the three-power-supply-system change-over switch 18, and the output end of the three-power-supply-system change-over switch 18 is connected with the security section bus 19.
The wind generating set 2 is connected with a wind power photovoltaic power station bus 9 through a wind generating set boost transformer 4 and a wind generating set grid-connected switch 6.
The photovoltaic generator set 3 is connected with a wind power photovoltaic power station bus 9 through a photovoltaic generator set boost transformer 5 and a photovoltaic generator set grid-connected switch 7.
The service bus 8 is connected with the first input end of the three power system change-over switch 18 through the service security power working power switch 13 and the security power working transformer 15.
The wind power photovoltaic power station bus 9 is connected with a second input end of a three-power-system change-over switch 18 through an auxiliary security power supply standby power switch 14 and a security power supply standby transformer 16.
Referring to fig. 2, the method for complementing the service power and the security power of the new energy power station and the thermal power plant of the present invention includes the following steps:
1) after the service transformer 1 is electrified, the service bus incoming line switch 11 is closed, and the service bus 8 is electrified;
2) closing a wind power photovoltaic power station outlet switch 12, closing a wind power photovoltaic power station inlet switch 10, and electrifying a wind power photovoltaic power station bus 9;
3) after the rotating speed of blades in the wind generating set 2 reaches the output power condition, an excitation power supply starts to excite, the wind generating set 2 starts to output power, when the output voltage of the wind generating set 2 reaches the grid-connected condition, the output voltage is merged into a wind power photovoltaic power station bus 9 through a wind generating set grid-connected switch 6, and the wind generating set 2 supplies power to service power normally; after the solar panel of the photovoltaic generator set 3 generates electric energy, voltage is built, when the output voltage of the photovoltaic generator set 3 reaches a grid-connected condition, the output voltage is merged into a wind power photovoltaic power station bus 9 through a grid-connected switch 7 of the photovoltaic generator set, and the photovoltaic generator set 3 normally supplies power to station service;
when wind power is insufficient and the rotating speed of blades in the wind generating set 2 cannot maintain the output power condition, the grid-connected switch 6 of the wind generating set is disconnected; when the solar panel of the photovoltaic generator set 3 cannot generate enough electric energy, the grid-connected switch 7 of the photovoltaic generator set is disconnected;
4) closing a working power switch 13 of the service safety power supply and closing a standby power switch 14 of the service safety power supply;
5) when the service power is normal, the three-power-supply system change-over switch 18 selects a working power supply which is switched into the service power security power supply to supply power, so that the security section bus 19 is electrified;
when the service power is lost, the incoming line switch 10 of the wind power photovoltaic power station is automatically switched off, the diesel generator 17 is started, whether the output voltage of the emergency power supply standby transformer 16 is normal or not is judged, when the output voltage of the emergency power supply standby transformer 16 is normal, the step 6) is carried out, and otherwise, the step 7) is carried out;
6) the three-power system change-over switch 18 selects to be switched into the emergency transformer 16 of the security power supply for power supply, and the bus 19 of the security section is electrified;
7) after the diesel generator 17 is successfully built, the three-power-supply-system change-over switch 18 is selected to be switched into the diesel generator 17 for power supply, and the safety section bus 19 is electrified.
The method for complementing the service power and the security power supply of the new energy power station and the thermal power plant can also be used for wind-light storage new energy power stations.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (6)
1. A system for complementing station service power and security power of a new energy power station and a thermal power plant is characterized by comprising a station service transformer (1), a station service bus (8), a wind generating set (2), a wind generating set grid-connected switch (6), a wind power photovoltaic power station bus (9), a photovoltaic generating set (3), a photovoltaic generating set grid-connected switch (7), a wind power photovoltaic power station outlet switch (12), a wind power photovoltaic power station inlet switch (10), a station service security power working power switch (13), a three-power-source system change-over switch (18), a station service security power standby power switch (14) and a security section bus (19);
the output end of the service transformer (1) is connected with a service bus (8), the wind generating set (2) is connected with a wind power photovoltaic power station bus (9) through a wind generating set grid-connected switch (6), the photovoltaic generating set (3) is connected with the wind power photovoltaic power station bus (9) through a photovoltaic generating set grid-connected switch (7), and the service bus (8) is connected with the service bus (8) through a wind power photovoltaic power station outgoing switch (12) and a wind power photovoltaic power station incoming switch (10);
the utility bus (8) is connected with the first input end of the three-power-supply-system change-over switch (18) through the service safety power supply working power supply switch (13), the wind power photovoltaic power station bus (9) is connected with the second input end of the three-power-supply-system change-over switch (18) through the service safety power supply standby power supply switch (14), the diesel generator (17) is connected with the third input end of the three-power-supply-system change-over switch (18), and the output end of the three-power-supply-system change-over switch (18) is connected with the safety section bus (19).
2. The system for complementing new energy power stations with service and security power supplies of thermal power plants according to claim 1, wherein the wind generating set (2) is connected with a wind photovoltaic power station bus (9) through a wind generating set step-up transformer (4) and a wind generating set grid-connected switch (6).
3. The system for complementing the new energy power station with the service power and the security power supply of the thermal power plant as claimed in claim 1, wherein the photovoltaic generator set (3) is connected with the wind power photovoltaic power station bus (9) through a photovoltaic generator set step-up transformer (5) and a photovoltaic generator set grid-connected switch (7).
4. The system of complementation of new energy plant with thermal power plant service and security power supply according to claim 1, characterized by the fact that the service bus (8) is connected to the first input of the three-power system transfer switch (18) through the service security power working switch (13) and the security power working transformer (15).
5. The system of complementation of new energy plant with thermal power plant service and security power supply according to claim 1, characterized by the fact that the wind photovoltaic plant busbar (9) is connected to the second input of the three-power system diverter switch (18) through the service security power backup switch (14) and the security power backup transformer (16).
6. A method for complementing station service power and security power of a new energy power station and a thermal power plant is characterized by comprising the following steps:
1) after the service transformer (1) is electrified, a service bus incoming line switch (11) is closed, and a service bus (8) is electrified;
2) closing a wind power photovoltaic power station outgoing line switch (12), closing a wind power photovoltaic power station incoming line switch (10), and electrifying a wind power photovoltaic power station bus (9);
3) after the rotating speed of blades in the wind generating set (2) reaches an output power condition, an excitation power supply starts to excite, the wind generating set (2) starts to output power, when the output voltage of the wind generating set (2) reaches a grid-connected condition, the output voltage is merged into a wind photovoltaic power station bus (9) through a wind generating set grid-connected switch (6), and the wind generating set (2) normally supplies power to plant power; after the solar panel of the photovoltaic generator set (3) generates electric energy, voltage is built, when the output voltage of the photovoltaic generator set (3) reaches a grid-connected condition, the output voltage is merged into a wind power photovoltaic power station bus (9) through a grid-connected switch (7) of the photovoltaic generator set, and the photovoltaic generator set (3) normally supplies power to service power;
when wind power is insufficient and the rotating speed of blades in the wind generating set (2) cannot maintain the output power condition, the grid-connected switch (6) of the wind generating set is disconnected; when the solar panel of the photovoltaic generator set (3) cannot generate enough electric energy, the grid-connected switch (7) of the photovoltaic generator set is disconnected;
4) closing a working power switch (13) of the safety power supply for service use, and closing a standby power switch (14) of the safety power supply for service use;
5) when the service power is normal, the three-power-supply system change-over switch (18) selects a service power security power supply to supply power, so that the security section bus (19) is electrified;
when the service power is lost, the incoming line switch (10) of the wind power photovoltaic power station is automatically disconnected, the diesel generator (17) is started, whether the output voltage of the emergency power supply standby transformer (16) is normal or not is judged, when the output voltage of the emergency power supply standby transformer (16) is normal, the step 6 is carried out, and if not, the step 7 is carried out;
6) a three-power system change-over switch (18) selects to be connected into a security power supply standby transformer (16) for supplying power, and a security section bus (19) is electrified;
7) after the diesel generator (17) is successfully built, the three-power-supply-system change-over switch (18) is selected to switch in the diesel generator (17) for supplying power, and the safety section bus (19) is electrified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110154914.3A CN112803579A (en) | 2021-02-04 | 2021-02-04 | Complementary system and method for auxiliary power supply and security power supply of new energy power station and thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110154914.3A CN112803579A (en) | 2021-02-04 | 2021-02-04 | Complementary system and method for auxiliary power supply and security power supply of new energy power station and thermal power plant |
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| CN112803579A true CN112803579A (en) | 2021-05-14 |
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| CN202110154914.3A Pending CN112803579A (en) | 2021-02-04 | 2021-02-04 | Complementary system and method for auxiliary power supply and security power supply of new energy power station and thermal power plant |
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| CN (1) | CN112803579A (en) |
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2021
- 2021-02-04 CN CN202110154914.3A patent/CN112803579A/en active Pending
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