CN214176921U - Self-energy-storage black starting system of 220kV voltage class unit wiring hydropower station - Google Patents
Self-energy-storage black starting system of 220kV voltage class unit wiring hydropower station Download PDFInfo
- Publication number
- CN214176921U CN214176921U CN202022697023.6U CN202022697023U CN214176921U CN 214176921 U CN214176921 U CN 214176921U CN 202022697023 U CN202022697023 U CN 202022697023U CN 214176921 U CN214176921 U CN 214176921U
- Authority
- CN
- China
- Prior art keywords
- switch
- self
- power
- disconnecting link
- bus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- Y02E10/20—Hydro energy
Abstract
The utility model provides a 220kV voltage level unit wiring hydropower station self-energy-storage black start system, which comprises a hydraulic generator, a 10kV station bus, a first 400V self-electricity bus, a second 400V self-electricity bus, a 400V self-electricity networking switch, a 20kV disconnecting link and a 220kV line; under the condition that the power of the sending-out line is lost, the power supply of the unit wiring hydropower station can be safely, quickly and reliably sent out quickly, and the power grid can be helped to recover power supply.
Description
Technical Field
The utility model belongs to the technical field of the power station black start, concretely relates to 220kV voltage level unit wiring power station is from black start-up system of energy storage.
Background
The 'black start' of the hydroelectric generating set is one content of auxiliary services of four major power grids (frequency modulation, standby, peak regulation and black start), and a power plant with black start capability can be compensated by the auxiliary services of the power grids every year. The 'black start' refers to that the power station utilizes the characteristic of quick self start to provide plant power required by start under the condition that the power grid is totally black, the hydroelectric generating set starts to fix speed, the loaded excitation stator builds up voltage to reach the rated value, the cut-in FCB operation mode is stable, the voltage is boosted by a main transformer, the electricity is transmitted to an opposite side transformer substation through a transmission line to provide plant power for starting an opposite side generating set, the purpose of burning the original star fire is achieved, and the electrification of the power grid system is recovered. The currently known black start technology has the following problems: (1) when the hydro-turbine set is started by utilizing the self-energy storage of the speed regulator oil pressure system, the maximum allowable time of the speed regulator oil pressure system exists, and the potential safety hazard of the black start of the hydro-turbine set exists under the condition that the hydro-turbine set does not have a factory power supply; (2) the self-energy storage and diesel generator have not been combined for black start; (3) at present, no hydropower station black start technology related to wiring of the generator-transformer unit is available.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model provides a 220kV voltage level unit wiring power station is from black start-up system of energy storage, under the condition that the circuit loses the electricity of seeing off, can safely, fast, reliable see off unit wiring power station power fast, help the electric wire netting to resume the power supply.
The utility model discloses a realize through following technical scheme:
a self-energy-storage black-start system of a 220kV voltage class unit wiring hydropower station comprises a hydraulic generator, a 10kV station bus, a first 400V self-electricity bus, a second 400V self-electricity bus, a 400V self-electricity networking switch, a 20kV disconnecting link and a 220kV line;
one end of the hydraulic generator is connected with the ground, and the power generation end is connected with the 10kV service bus through a high-voltage service transformer and a 10kV service incoming switch in sequence;
the second 400V self-power-utilization bus is connected with the 10kV station-service bus through a 400V self-power-utilization connecting switch, a first 400V self-power-utilization bus, a first 400V self-power-utilization switch, a first 400V low-voltage station-service transformer and a first 10kV feeder switch in sequence;
and one end T of the 20kV disconnecting link is connected to a common point where the hydraulic generator and the high-voltage station transformer are connected, and the other end of the 20kV disconnecting link is connected with the 220kV line through the main transformer, the grid-connected switch and the 220kV disconnecting link in sequence.
Preferably, the system also comprises a flood gate diesel generator and an interconnected 400V power switch;
the flood gate diesel generator is connected with the 10kV station bus through a 400V outlet switch, a second 400V low-voltage station transformer, a 10kV disconnecting link and a second 10kV feeder switch in sequence;
the interconnected 400V power switch is connected with the second 400V self-power utilization bus;
the brake switch utilizes electromagnetic force generated by electromagnetic induction to brake the hydraulic generator, one end T of the brake switch is connected to a common point connected with the hydraulic generator and the 20kV disconnecting link, and the other end of the brake switch is in short circuit with three phases A, B, C.
Further, when the maximum allowable operation time after the hydraulic system of the hydraulic generator is power-off is determined, the grid-connected switch, the 10kV incoming line switch, the first 10kV feeder switch, the second 10kV feeder switch and the interconnected 400V power switch are all in a disconnected state, and are used for cutting off the working power supply of the oil pump of the hydraulic system of the hydraulic generator.
Further, before the hydro-generator is started in a self-energy-storage black state, the brake switch, the grid-connected switch, the 220kV disconnecting link and the second 10kV feeder switch are all in an off state, and the neutral point grounding disconnecting link, the 20kV disconnecting link, the 10kV incoming line switch, the first 10kV feeder switch, the first 400V self-power-consumption switch, the 400V self-power-consumption connecting switch and the 10kV disconnecting link are all in an on state.
Further, before the water turbine generator is provided with a main transformer to charge the 220kV line, the 20kV disconnecting link, the grid-connected switch and the 220kV disconnecting link are all in a closed state.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model discloses hydraulic generator, main transformer and 220kV circuit adopt the unit wiring, and equipment is less, simple structure, and the operation of being convenient for when black start can see off the power fast, and the construction cost is low. The hydraulic generator is stopped by adopting electromagnetic induction generated by the brake switch to generate electromagnetic force, and the hydraulic generator is quickly stopped in a short time under the out-of-control condition.
Drawings
Fig. 1 is a schematic diagram of the black start principle of the present invention.
Fig. 2 is a schematic diagram of the principle before black start of the present invention.
Fig. 3 is a schematic diagram of the line charging principle of the present invention.
Fig. 4 is the utility model discloses a black start schematic when the self-energy storage can't be started.
In the figure: 1-neutral point earthing knife switch; 2-a hydro-generator; 3, a brake switch; 4-high voltage service transformer; 5-10kV incoming line switch; 6-10kV factory bus; 7-a first 10kV feeder switch; 8-a first 400V low-voltage station transformer; 9-first 400V self-powered switch; 10-a first 400V self-powered bus; 11-a second 400V self-electricity-using bus; the 12-400V self-powered electrical connection switch; 13-20kV disconnecting link; 14-a main transformer; 15-a grid-connected switch; 16-220kV disconnecting link; 17-220kV line; 18-a floodgate diesel generator; 19-400V outlet switch; 20-a second 400V low-voltage station transformer; 21-10kV disconnecting link; 22-a second 10kV feeder switch; 23-interconnected 400V power switches.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
The utility model relates to a black start-up system of self-energy storage of 220kV voltage level unit wiring power station, including hydraulic generator, high-pressure station transformer, first 400V low-voltage station transformer, second 400V low-voltage station transformer, flood discharge gate diesel generator, main transformer and 220kV circuit; the utility model discloses a speed regulator oil pressure system loses the biggest permissible operating duration after the electricity of experiment confirmed. When the hydropower station loses power, the guide vane is opened by self-energy storage of the speed regulator oil pressure system in time, the water wheel is adjusted to the rated rotating speed, the excitation system helps the generator to build the voltage to the rated voltage by using a direct current excitation mode, the service power system is further recovered, a line charging test is carried out, and the line power supply is recovered. If the generator does not successfully build the voltage within the maximum allowable operation time of the power failure of the speed regulator oil pressure system, the diesel generator is quickly started before the allowable time arrives, the plant power system is recovered, and the unit is assisted to perform black start; the utility model discloses can be safe, quick, reliable send out unit wiring power station power fast, help the electric wire netting resumes the power supply.
As shown in fig. 1, the self-energy-storage black-start system of the 220kV voltage class unit-connection hydropower station comprises a hydro-generator 2, a 10kV service bus 6, a first 400V self-service bus 10, a second 400V self-service bus 11, a 400V self-service electrical contact switch 12, a 20kV disconnecting link 13, and a 220kV line 17;
one end of the hydraulic generator 2 is connected with the ground, and the power generation end is connected with the 10kV service bus 6 through a high-voltage service transformer 4 and a 10kV service incoming switch 5 in sequence;
the second 400V automatic power bus 11 is connected with the 10kV station service bus 6 through a 400V automatic power network connection switch 12, a first 400V automatic power bus 10, a first 400V automatic power switch 9, a first 400V low-voltage station service transformer 8 and a first 10kV feeder switch 7 in sequence;
one end T of the 20kV disconnecting link 13 is connected to a common point where the hydraulic generator 2 and the high-voltage station transformer 4 are connected, and the other end of the 20kV disconnecting link is connected with the 220kV line 17 through a main transformer 14, a grid-connected switch 15 and a 220kV disconnecting link 16 in sequence.
In this embodiment, the specific parameters of the hydraulic generator 2 are as follows:
in this embodiment, the specific parameters of the 220kV line 17 are as follows:
in this embodiment, the specific parameters of the main transformer are as follows:
| model number | SFP8-380000/220 | Rated valueCapacity of | 380MVA |
| Rated voltage | 236kV±2×2.5％/18kV | Rated frequency | 50Hz |
| Rated current | 929.9/12188.5A | Connecting set | Yn,d11 |
| Manufacturer of the product | Xi'an transformer factory | Impedance voltage | 16.5％ |
| No load current | 0.2％ | No load loss | 163.75kW |
In this embodiment, the specific parameters of the high-voltage station transformer 4 are as follows:
in the embodiment, the electric power generating system further comprises a flood gate diesel generator 18 and an interconnected 400V power switch 23;
the flood gate diesel generator 18 is connected with the 10kV station bus 6 through a 400V outlet switch 19, a second 400V low-voltage station transformer 20, a 10kV disconnecting link 21 and a second 10kV feeder switch 22 in sequence;
the interconnected 400V power switch 23 is connected with the second 400V self-power-utilization bus 11;
the brake switch 3 utilizes electromagnetic force generated by electromagnetic induction to brake the hydraulic generator 2, one end T of the brake switch is connected with a common point connected with the hydraulic generator 2 and the 20kV disconnecting link 13, the other end of the brake switch short-circuits the three phases A, B, C, and the brake switch 3 is only in a closed state when the hydraulic generator 2 needs to brake.
In this embodiment, the specific parameters of the flood gate diesel generator 18 are as follows:
in this embodiment, when the maximum allowable operation time after the power failure of the hydraulic system of the hydraulic generator is determined, the grid-connected switch 15, the 10kV inlet switch 5, the first 10kV feeder switch 7, the second 10kV feeder switch 22, and the interconnected 400V power switch 23 are all in an off state, and are used for cutting off the working power supply of the oil pump of the hydraulic system of the hydraulic generator 2, recording the pressure Pbt of the hydraulic system before the test, turning on the hydraulic generator 2, adjusting the rotation speed to be the rated rotation speed of 136.4r/min, recording the time Te when the pressure of the hydraulic system of the hydraulic generator 2 drops to the minimum operation oil pressure Pmin, calculating the oil pressure dropping speed of the hydraulic system of the hydraulic generator 2 to be (Pbt-Pmin)/Te, and pre-judging the maximum allowable operation time of self-storing black start to be Tmax-Pmin/V according to the pressure Pzcn of the hydraulic system before the self-storing black start of the hydraulic generator 2, namely, the hydraulic generator 2 must be successfully started within the time Tmax, and the power supply of the first 400V self-power utilization bus 10 and the second 400V self-power utilization bus 11 must be recovered at the time Tmax.
In this embodiment, the hydraulic system of the hydraulic generator is adjusted to a rated oil pressure of 3.95Mpa, the hydraulic system is started to an idle speed of 136.4r/min, and after the hydraulic system is operated for 22min, the oil pressure of the hydraulic system is close to the lowest operation oil pressure of 3.2Mpa, and the oil pressure reduction rate is 0.021 Mpa/min.
As shown in fig. 2, before the hydraulic generator 2 is started in a self-energy-storage black state, the brake switch 3, the grid-connected switch 15, the 220kV disconnecting link 16 and the second 10kV feeder switch 22 are all in an off state, the neutral point grounding disconnecting link 1, the 20kV disconnecting link 13, the 10kV incoming line switch 5, the first 10kV feeder switch 7, the first 400V self-powered switch 9, the 400V self-powered connecting link switch 12 and the 10kV disconnecting link 21 are all in a closed state, the hydraulic generator 2 is adjusted to have a rated rotation speed of 136.4r/min, the hydraulic generator 2 is pressurized to a rated voltage by adopting a direct current excitation starting mode, the first 400V self-powered bus 10 and the second 400V self-powered bus 11 are restored to be powered, the oil pump working power supply of the hydraulic system of the hydraulic generator 2 is restored, and the hydraulic system of the hydraulic generator 2 is adjusted to a rated oil pressure.
As shown in fig. 3, before the main transformer 14 of the hydraulic generator 2 charges the 220kV line 17, the 20kV disconnecting link 13, the grid-connected switch 15 and the 220kV disconnecting link 16 are all in a closed state, the voltage built at the generator end of the hydraulic generator 2 is 100% of the rated voltage, and the voltage at the opposite side of the 220kV line 17 is checked and confirmed to be the rated voltage.
As shown in fig. 4, when the hydraulic generator 2 fails to start successfully within the time Tmax, the first 400V self-power bus 10 and the second 400V self-power bus 11 fail to recover power supply at the time Tmax, namely, immediately disconnecting the 10kV inlet switch 5 and the grid-connected switch 15 after the Tmax is reached, closing the 400V outlet switch 19 and the second 10kV feeder switch 22, adjusting the voltage build-up at the terminal of the flood gate diesel generator 18 to the rated voltage, the first 400V self-power-utilization bus 10 and the second 400V self-power-utilization bus 11 recover the power supplied by the flood gate diesel generator 18, the guide vanes of the hydraulic generator 2 are opened, the hydraulic generator 2 is adjusted to have the rated rotating speed of 136.4r/min, and the hydraulic generator 2 builds voltage to rated voltage, the hydraulic generator 2 with the main transformer 14 charges the 220kV line 17 again, and the grid-connected switch 15 is closed.
The utility model relates to a 220kV voltage level unit wiring power station is from black start-up system of energy storage, when carrying out black start-up, including following step:
1) adjusting the cold standby states of the 220kV line 17 and the main transformer 14, closing the neutral point grounding disconnecting link 1 and the 20kV disconnecting link 13, and entering the step 2);
2) checking the no-voltage state of the 10kV station bus 6, disconnecting the 400V outlet switch 19, the second 10kV feeder switch 22 and the 10kV incoming line switch 5, closing the first 10kV feeder switch 7, the first 400V self-power-utilization switch 9 and the 400V self-power-utilization connecting switch 12, and entering the step 3);
3) manually inputting the technical water supply of the hydraulic generator 2, starting timing, and entering the step 4);
4) adjusting the rotating speed to be 136.4r/min of the rotating speed of the hydraulic generator 2, setting the voltage to be 100% rated voltage, judging whether the timing time is less than or equal to the maximum allowed running time of self-energy-storage black start to be Tmax, if the time requirement is met, closing the 10kV incoming line switch 5, and measuring that the first 400V self-power bus 10 and the second 400V self-power bus 11 are at the rated voltage of 400V; if the time requirement is not met, the 10kV incoming line switch 5 is immediately disconnected, the flood gate diesel generator 18 is started to be in no-load, and the first 400V self-power bus 10 and the second 400V self-power bus 11 are powered by the flood gate diesel generator 18; and go to step 5)
5) The hydraulic system oil pump working power supply of the hydraulic generator 2 recovers power supply, the 220kV line 17 and the main transformer 14 are operated to convert heat for standby, the grid-connected switch 15 is closed, and the step 6 is carried out;
6) checking and confirming that the voltage and the phase sequence of the opposite side of the 220kV line 17 are correct, and entering the step 7);
7) and (3) switching the 220kV line 17 and the main transformer 14 to a cold standby state, disconnecting the first 400V self-service electric switch 9, closing the interconnected 400V power switch 23, operating the hydraulic generator 2 to stop, and disconnecting the second 10kV feeder switch 22 and the 400V outlet switch 19).
In this embodiment, the voltage of the hydraulic generator 2 in the step 4) is 18 kV; starting the floodgate diesel generator 18 to be unloaded, wherein the unloaded voltage Uab of the floodgate diesel generator 18 is 400V, Ubc is 401V, Uca is 401V, the frequency f is 50.3Hz, closing the second 10kV feeder switch 22 and the 400V outlet switch 19, the 10kV plant bus 6-phase voltage Ua is 5.9kV, Ub is 6.0kV, Uc is 5.9kV, the first 400V self-use bus 10-voltage Uab is 400.42V, Ubc is 400.65V, Uca is 400.11V, the second 400V self-use bus 11-voltage Uab is 400.42V, Ubc is 400.59V, Uca is 400.26V.
The above, only the utility model discloses a preferred embodiment, it is not right the utility model discloses a do any restriction, all according to the utility model discloses any simple modification, change and the equivalent structure change of technical essence to doing above embodiment all still belong to the utility model discloses technical scheme's within the scope of protection.
Claims (5)
1. The automatic energy storage black start system of the 220kV voltage class unit wiring hydropower station is characterized by comprising a hydraulic generator (2), a 10kV station bus (6), a first 400V automatic power bus (10), a second 400V automatic power bus (11), a 400V automatic power connection switch (12), a 20kV disconnecting link (13) and a 220kV line (17);
one end of the hydraulic generator (2) is connected with the ground, and the power generation end is connected with the 10kV service bus (6) through a high-voltage service transformer (4) and a 10kV service incoming switch (5) in sequence;
the second 400V self-power-utilization bus (11) is connected with the 10kV station-utilization bus (6) through a 400V self-power-utilization connecting switch (12), a first 400V self-power-utilization bus (10), a first 400V self-power-utilization switch (9), a first 400V low-voltage station-utilization transformer (8) and a first 10kV feeder switch (7) in sequence;
and one end T of the 20kV disconnecting link (13) is connected to a common point where the hydraulic generator (2) and the high-voltage station transformer (4) are connected, and the other end of the 20kV disconnecting link is connected with the 220kV line (17) through a main transformer (14), a grid-connected switch (15) and a 220kV disconnecting link (16) in sequence.
2. The self-energy-storage black-start system of a 220kV voltage class unit-wired hydropower station of claim 1, further comprising a flood gate diesel generator (18) and an interconnected 400V power switch (23);
the flood gate diesel generator (18) is connected with the 10kV station-used bus (6) through a 400V outlet switch (19), a second 400V low-voltage station-used transformer (20), a 10kV disconnecting link (21) and a second 10kV feeder switch (22) in sequence;
the interconnected 400V power switch (23) is connected with the second 400V self-power-utilization bus (11);
the brake switch (3) utilizes electromagnetic force generated by electromagnetic induction to brake the hydraulic generator (2), one end T of the brake switch is connected with a common point connected with the hydraulic generator (2) and the 20kV disconnecting link (13), and the other end of the brake switch is in short circuit with the three-phase A, B, C.
3. The self-energy-storage black-start system of the 220kV voltage class unit-connected hydropower station according to claim 2, wherein when the maximum allowable operation time of the hydraulic system of the hydraulic generator (2) after power failure is determined, the grid-connected switch (15), the 10kV incoming switch (5), the first 10kV feeder switch (7), the second 10kV feeder switch (22) and the interconnected 400V power switch (23) are all in an off state, and are used for cutting off an oil pump working power supply of the hydraulic system of the hydraulic generator (2).
4. The self-energy-storage black start system of the 220kV voltage class unit-connection hydropower station according to claim 3, wherein before the hydro-generator (2) is subjected to self-energy-storage black start, the brake switch (3), the grid-connected switch (15), the 220kV disconnecting link (16) and the second 10kV feeder switch (22) are all in an open state, and the neutral point grounding disconnecting link (1), the 20kV disconnecting link (13), the 10kV incoming line switch (5), the first 10kV feeder switch (7), the first 400V self-powered switch (9), the 400V self-powered connecting switch (12) and the 10kV disconnecting link (21) are all in a closed state.
5. The self-energy-storage black-start system of the 220kV voltage class unit-connected hydropower station according to claim 4, wherein the 20kV disconnecting link (13), the grid-connected switch (15) and the 220kV disconnecting link (16) are in a closed state before the hydro-generator (2) is charged with the main transformer (14) to the 220kV line (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022697023.6U CN214176921U (en) | 2020-11-19 | 2020-11-19 | Self-energy-storage black starting system of 220kV voltage class unit wiring hydropower station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022697023.6U CN214176921U (en) | 2020-11-19 | 2020-11-19 | Self-energy-storage black starting system of 220kV voltage class unit wiring hydropower station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214176921U true CN214176921U (en) | 2021-09-10 |
Family
ID=77601151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022697023.6U Active CN214176921U (en) | 2020-11-19 | 2020-11-19 | Self-energy-storage black starting system of 220kV voltage class unit wiring hydropower station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214176921U (en) |
-
2020
- 2020-11-19 CN CN202022697023.6U patent/CN214176921U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108964115B (en) | DC coupling power electronic system of fuel cell power system | |
| CN112311014A (en) | Automatic energy storage black start system and method for 220kV voltage level unit wiring hydropower station | |
| CN109742809B (en) | Multi-source complementary energy storage type power station security power supply system and control method thereof | |
| US20160181909A1 (en) | Electric unit for a pump-storage power plant | |
| CN104505859A (en) | Method for using speed regulators during hydropower station isolated network operation linkage grid-connected power generation | |
| CN112332455A (en) | Hydropower station black start system and method with double-voltage-level wiring | |
| CN207977741U (en) | aircraft DC power supply system | |
| CN113991731A (en) | Black start method for energy storage system of large gas turbine | |
| CN214176921U (en) | Self-energy-storage black starting system of 220kV voltage class unit wiring hydropower station | |
| CN112290669A (en) | Electrical system for combined black start of 9E and 9F gas turbine and working method thereof | |
| CN209375151U (en) | A kind of multi-source complementation accumulation energy type power plant emergency power supply system | |
| CN108306330A (en) | The method that governor black starting-up is utilized under power station isolated power grid linkage and net state | |
| CN112311016A (en) | Black start system and method for single-bus subsection gas turbine power station with bypass bus connection | |
| CN109004678B (en) | Black-start power distribution system of multi-energy combined power plant and control method | |
| CN208908362U (en) | A kind of regional power grid excitation surge current elimination system | |
| CN112615395B (en) | Roof light storage type wind power plant black start method | |
| CN213817253U (en) | Black start system of gas turbine power station with single-bus subsection and bypass bus connection | |
| CN112350374A (en) | Black start system and method for 500kV voltage grade four-third-connection hydropower station | |
| CN213754009U (en) | Hydropower station black start system with double-voltage-level wiring | |
| CN111162530B (en) | Power access system for generator outlet to access peak shaving facility | |
| CN112311012A (en) | Black start system and method for 220kV voltage-class internal and external bridge connection non-high-rise factory substation | |
| Arduini et al. | BESS Support to DFIG-based Wind Turbines connected to medium-voltage distribution networks | |
| CN112311013A (en) | 110kV system assisted 500kV system thermal power generating unit black start system and method | |
| CN110896222B (en) | Reactive compensation method of asynchronous generator | |
| CN106611994B (en) | Standby power supply system of offshore wind field fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |