A black start simulation test system and method for a hydropower station with a factory water turbine generator

Abstract

A black start simulation test system and method for a hydropower station of a factory water turbine generator, including a 400V water turbine generator, a second 400V factory busbar, a first 10kV water turbine generator, a first main transformer and a second 220kV busbar; under the condition that the second 220kV line and the first 220kV line cannot be powered off, it simulates that when the voltage of the second 220kV busbar is completely lost, the first 10kV water turbine generator set does not rely on any external power source, and only relies on the 400V water turbine generator set to drive the auxiliary equipment of the second 400V factory busbar to operate, completes the start-up procedure of starting, constant speed, generator excitation and stator voltage building of the first 10kV water turbine generator, establishes a frequency-stable and correctly indicated voltage for the second 220kV busbar on this side, verifies the black start ability of the first 10kV water turbine generator set, and can provide an environmentally friendly black start power source for the power grid; by configuring a 400V factory water turbine generator, a black start test is carried out under the condition that the outgoing line is not powered off.

Description

Technical Field

[0001] The invention belongs to the technical field of black start of hydropower stations, and particularly relates to a black start simulation test system and method for a factory water turbine generator of a hydropower station. Background Art

[0002] Due to the increasingly prominent environmental problems globally, various organizations and countries have formulated several policies for environmental problems, aiming to protect the environment, reduce carbon emissions, maintain sustainable energy development, establish an environmentally friendly energy, and achieve harmonious coexistence between humans and nature. In response to the call of the World Environment Organization, China announced to the world its carbon emission intensity reduction target in 2020. Therefore, it has vigorously developed new energy, from onshore photovoltaic and wind power to offshore wind power projects along the coast. The continuous access of new energy to the traditional power grid, due to the randomness of its power generation, has increased the difficulty of power grid regulation, further highlighting the importance of the black start defense of the power grid in dealing with large-scale accidents. Most of the units with black start capabilities in China are hydropower units accounting for 16.26%. Due to the limitation of natural gas resources, the proportion of gas turbines in each province of China is very small. Generally speaking, hydropower has become the main power source for China's power grid to cope with large power outages due to its natural advantages. In order to efficiently respond to the increasingly growing black start capabilities of the power grid, it is necessary to carry out black start capability construction work for hydropower units to provide an environmentally friendly, reliable and high-quality black start power source for the power grid. The existing hydropower station black start technology has the following problems: (1) When the self-storage energy of hydropower cannot guarantee startup, it is necessary to rely on a diesel generator for startup work. However, the diesel generator is an intermittent startup power source in hydropower. Due to other reasons such as maintenance and weather, the event that it cannot start at a critical moment occurs frequently; (2) The existing emergency power source for hydropower stations is usually a diesel generator, and the advantage of using the natural energy storage of the dam has not been considered. By configuring a 400V factory water turbine generator, it can cope with emergencies where the diesel generator cannot start in a hydropower station; (3) Traditional black start tests must set aside a line for testing. Therefore, black start tests are usually carried out when the line is powered off. Summary of the Invention

[0003] Aiming at the problems existing in the prior art, the invention provides a black start simulation test system and method for a factory water turbine generator of a hydropower station. By configuring a 400V factory water turbine generator, it can replace the black start power source diesel generator and carry out black start tests without powering off the outgoing line, verifying that the hydropower station has the black start capability required by the power grid in the case of power loss.

[0004] The invention is realized through the following technical solutions:

[0005] A black start simulation test system for a factory water turbine generator of a hydropower station includes a 400V water turbine generator, a second 400V factory busbar, a first 10kV water turbine generator, and a second 220kV busbar;

[0006] The 400V hydrogenerator is connected to the second 400V auxiliary bus through a safety air switch.

[0007] The first 10kV hydrogenerator is connected to the second 220kV bus through a first outlet circuit breaker, a first 10kV disconnecting switch, a first main transformer, a first 220kV circuit breaker, and a first 220kV disconnecting switch in sequence.

[0008] The 400V hydrogenerator is used to supply power to the auxiliaries of the second 400V auxiliary bus of the first 10kV hydrogenerator.

[0009] Preferably, it further includes a first bus tie disconnecting switch, a first 220kV bus, a second 220kV disconnecting switch, a third 400V auxiliary bus, a third 10kV disconnecting switch, a first 10kV circuit breaker, a fourth 10kV disconnecting switch, a first 10kV auxiliary bus, and a second 400V tie disconnecting switch.

[0010] One end of the first bus tie disconnecting switch is connected to the second 220kV bus, and the other end is connected to the first 220kV bus through a 220kV bus tie circuit breaker and a second bus tie disconnecting switch.

[0011] One end of the second 220kV disconnecting switch is connected to the first 220kV bus, and the other end is connected to the common point between the first 220kV circuit breaker and the first 220kV disconnecting switch.

[0012] The third 400V auxiliary bus is connected to the first 10kV auxiliary bus through a first 400V tie switch, a first 400V tie disconnecting switch, a first 400V auxiliary bus, a first 400V disconnecting switch, a first 400V switch, a second 400V disconnecting switch, a first 400V auxiliary transformer, a second 10kV disconnecting switch, a fifth 10kV disconnecting switch, a first auxiliary 10kV isolating transformer, a second 10kV circuit breaker, and a sixth 10kV disconnecting switch in sequence.

[0013] The first 10kV auxiliary bus is connected to the third 400V auxiliary bus through a seventh 10kV disconnecting switch, a third 10kV circuit breaker, and a standby transformer in sequence.

[0014] One end of the fourth 10kV disconnecting switch is connected to the common point between the first outlet circuit breaker and the first 10kV disconnecting switch, and the other end is connected to the common point between the second 10kV disconnecting switch and the fifth 10kV disconnecting switch through a first 10kV circuit breaker.

[0015] One end of the second 400V tie disconnecting switch is connected to the third 400V auxiliary bus, and the other end is connected to the second 400V auxiliary bus through a second 400V tie switch and a third 400V tie disconnecting switch.

[0016] Further, it also includes a third 400V disconnect switch, a tenth 10kV disconnect switch, a second 10kV auxiliary bus, a first 10kV tie disconnect switch, a 10kV tie circuit breaker, a second 10kV tie disconnect switch, a second 10kV hydro-generator, a fourth 220kV disconnect switch, a fifth 220kV disconnect switch, a third 220kV circuit breaker, a second 220kV line, an eighth 220kV disconnect switch, a fourth 220kV circuit breaker and a first 220kV line;

[0017] One end of the third 400V disconnect switch is connected to the second 400V auxiliary bus, and the other end is sequentially connected to the second 400V switch, the fourth 400V disconnect switch, the second 400V auxiliary transformer, the eighth 10kV disconnect switch, the eleventh 10kV disconnect switch, the second auxiliary 10kV isolating transformer, the fifth 10kV circuit breaker and the twelfth 10kV disconnect switch and then connected to the second 10kV auxiliary bus;

[0018] The second 10kV hydro-generator is sequentially connected to the second outgoing circuit breaker, the thirteenth 10kV disconnect switch, the second main transformer, the second 220kV circuit breaker and the third 220kV disconnect switch and then connected to the second 220kV bus;

[0019] One end of the fourth 220kV disconnect switch is connected to the first 220kV bus, and the other end is connected to the common point between the second 220kV circuit breaker and the third 220kV disconnect switch;

[0020] One end of the tenth 10kV disconnect switch is connected to the common point between the second outgoing circuit breaker and the thirteenth 10kV disconnect switch, and the other end is connected to the common point between the eighth 10kV disconnect switch and the eleventh 10kV disconnect switch via the fourth 10kV circuit breaker and the ninth 10kV disconnect switch;

[0021] One end of the fifth 220kV disconnect switch is connected to the second 220kV bus, and the other end is connected to the first 220kV bus via the sixth 220kV disconnect switch;

[0022] One end of the third 220kV circuit breaker is connected to the common point between the fifth 220kV disconnect switch and the sixth 220kV disconnect switch, and the other end is connected to the second 220kV line via the third 220kV circuit breaker and the seventh 220kV disconnect switch;

[0023] One end of the eighth 220kV disconnect switch is connected to the second 220kV bus, and the other end is connected to the first 220kV bus via the ninth 220kV disconnect switch;

[0024] One end of the fourth 220 kV circuit breaker is connected to the common point between the eighth 220 kV disconnecting switch and the ninth 220 kV disconnecting switch, and the other end is connected to the first 220 kV line via the tenth 220 kV disconnecting switch.

[0025] Further, the rated output voltage of the 400 V hydrogenerator is 400 V, the rated output voltage of the first 10 kV hydrogenerator is 10.5 kV, the turns ratio of the first main transformer is 242 kV / 10.5 kV, and the turns ratios of the first 400 V auxiliary transformer, the standby transformer, and the second 400 V auxiliary transformer are 10.5 kV / 0.4 kV, and the turns ratios of the first 10 kV auxiliary isolating transformer and the second 10 kV auxiliary isolating transformer are 10.5 kV / 10.5 kV.

[0026] Further, before the first 10 kV hydrogenerator and the first main transformer perform black start with the second 220 kV bus, the security air switch, the second 220 kV disconnecting switch, the first 400 V tie switch, the third 10 kV circuit breaker, the second 400 V tie switch, the 10 kV tie circuit breaker, the third 220 kV disconnecting switch, the sixth 220 kV disconnecting switch, and the eighth 220 kV disconnecting switch are all in the open state; the first outlet circuit breaker, the first 10 kV disconnecting switch, the first 220 kV circuit breaker, the first 220 kV disconnecting switch, the first bus-tie disconnecting switch, the 220 kV bus-tie circuit breaker, the second bus-tie disconnecting switch, the first 400 V tie disconnecting switch, the first 400 V disconnecting switch, the first 400 V switch, the second 400 V disconnecting switch, the second 10 kV disconnecting switch, the third 10 kV disconnecting switch, the first 10 kV circuit breaker, the fourth 10 kV disconnecting switch, the fifth 10 kV disconnecting switch, the second 10 kV circuit breaker, the sixth 10 kV disconnecting switch, the seventh 10 kV disconnecting switch, the second 400 V tie disconnecting switch, the third 400 V tie disconnecting switch, the third 400 V disconnecting switch, the second 400 V switch, the fourth 400 V disconnecting switch, the eighth 10 kV disconnecting switch, the ninth 10 kV disconnecting switch, the fourth 10 kV circuit breaker, the tenth 10 kV disconnecting switch, the eleventh 10 kV disconnecting switch, the fifth 10 kV circuit breaker, the twelfth 10 kV disconnecting switch, the first 10 kV tie disconnecting switch, the second 10 kV tie disconnecting switch, the second outlet circuit breaker, the thirteenth 10 kV disconnecting switch, the second 220 kV circuit breaker, the fourth 220 kV disconnecting switch, the fifth 220 kV disconnecting switch, the third 220 kV circuit breaker, the seventh 220 kV disconnecting switch, the ninth 220 kV disconnecting switch, the fourth 220 kV circuit breaker, and the tenth 220 kV disconnecting switch are all in the closed state; the terminal voltages of the first 10 kV hydrogenerator and the second 10 kV hydrogenerator are 10.5 kV, the second 220 kV line and the first 220 kV line are in the live operation state, the first 10 kV auxiliary bus and the second 10 kV auxiliary bus are in the live operation state, the second 400 V auxiliary bus, the first 400 V auxiliary bus, the first 400 V auxiliary transformer, the second 400 V auxiliary transformer, the first 10 kV auxiliary isolating transformer, the second 10 kV auxiliary isolating transformer, the second 220 kV bus, the first 220 kV bus, the first main transformer, and the second main transformer are all in the live operation state, and the third 400 V auxiliary bus and the standby transformer are in the hot standby state.

[0027] Further, after the first 10 kV hydrogenerator and the first main transformer perform the black start isolation switching operation with the second 220 kV bus, the second 10 kV circuit breaker, the first 400 V switch, the first 10 kV circuit breaker, the second 400 V switch, the third 400 V tie disconnecting switch, the first outlet circuit breaker, the first 220 kV circuit breaker, the fifth 220 kV disconnecting switch, and the 220 kV bus coupler circuit breaker are all in the open state; the 10 kV tie circuit breaker, the third 10 kV circuit breaker, the first 400 V tie switch, and the sixth 220 kV disconnecting switch are all in the closed state.

[0028] Further, during the black start test of the first 10 kV hydrogenerator and the first main transformer with the second 220 kV bus, the terminal voltage of the 400 V hydrogenerator is built up to 400 V, and the emergency air switch, the first outlet circuit breaker, and the first 220 kV circuit breaker are all in the closed state.

[0029] A method for simulating a black start test of a hydropower station with a station service hydrogenerator includes the following steps:

[0030] 1) Perform the black start isolation switching operation of the first 10 kV hydrogenerator and the first main transformer with the second 220 kV bus, and proceed to step 2);

[0031] 2) Start the 400 V hydrogenerator and build up the voltage to Uab, Uac, and Ubc all being 400 V, with the frequency f being 50 Hz, measure and confirm that its phase sequence is correct, and proceed to step 3);

[0032] 3) Close the emergency air switch, and the second 400 V station service bus is powered by the 400 V hydrogenerator, and proceed to step 4);

[0033] 4) Open the guide vane of the first 10 kV hydrogenerator and set the speed to 214.3 r / min, and proceed to step 5);

[0034] 5) The first 10 kV hydrogenerator performs zero-start voltage boosting with the first main transformer, and the first 10 kV hydrogenerator is excited to build up the voltage, and proceed to step 6);

[0035] 6) The first 10 kV hydrogenerator builds up the voltage to 20% of the rated voltage, and proceed to step 7);

[0036] 7) The first 10 kV hydrogenerator builds up the voltage to 50% of the rated voltage, and proceed to step 8);

[0037] 8) The first 10 kV hydrogenerator builds up the voltage to 100% of the rated voltage, with the frequency being 50 Hz, and proceed to step 9);

[0038] 9) Close the first 220 kV circuit breaker. The voltage of the second 220 kV bus is 220 kV, and proceed to step 10).

[0039] 10) Open the first outlet circuit breaker and the first 220 kV circuit breaker. The black start test of the first 10 kV hydro-generator and the first main transformer with the second 220 kV bus is completed.

[0040] Further, step 1) includes the following steps:

[0041] 101) Check and confirm that the 10 kV tie circuit breaker is in the open state, and proceed to step 102).

[0042] 102) Open the second 10 kV circuit breaker, close the 10 kV tie circuit breaker, and proceed to step 103).

[0043] 103) Open the first 400 V switch, close the third 10 kV circuit breaker, close the first 400 V tie switch, open the first outlet circuit breaker, and proceed to step 104).

[0044] 104) Open the first 10 kV circuit breaker, check and confirm that the second 400 V tie switch is in the open state, open the third 400 V tie disconnecting switch, open the second 400 V switch, and proceed to step 105).

[0045] 105) Open the first 220 kV circuit breaker, close the sixth 220 kV disconnecting switch, open the fifth 220 kV disconnecting switch, and proceed to step 106).

[0046] 106) Open the 220 kV bus-tie circuit breaker. The first 10 kV hydro-generator is in the shutdown state. The second 400 V auxiliary bus has no voltage. The second 220 kV bus has no voltage. The black start isolation switching operation of the 400 V hydro-generator and the first main transformer with the second 220 kV bus is completed.

[0047] Compared with the prior art, the present invention has the following beneficial technical effects:

[0048] Under the condition that the second 220 kV line is sent out and the first 220 kV line cannot be powered off, this invention simulates the situation where the voltage of the second 220 kV bus is completely lost. The first 10 kV hydro-generator set, without relying on any external power source, only drives the auxiliary equipment of the second 400 V auxiliary bus of the hydro-generator set by the 400 V hydro-generator set, completes the starting procedures of the first 10 kV hydro-generator, such as starting, constant speed, generator excitation, and stator voltage building, establishes a voltage with stable frequency and correct indication value for the second 220 kV bus on this side, verifies the black start ability of the first 10 kV hydro-generator set, and can provide an environmentally friendly black start power source for the power grid.

[0049] Furthermore, in this invention, the 400 V hydro-generator replaces the traditional diesel generator to supply power during the black start of the auxiliary equipment of the first 10 kV hydro-generator, realizes the start of the large hydro-generator set by the small hydro-generator set, provides a more environmentally friendly black start system for the hydropower station. At the same time, the 400 V hydro-generator can also be used to lift the flood discharge gate, ensuring the safety of the dam.

[0050] Furthermore, this invention utilizes the energy storage advantage of the hydropower station dam itself, configures a 400 V hydro-generator on the second 400 V auxiliary bus of the hydropower station, solves the problem that the diesel generator cannot be started, enhances the ability of the hydropower station to respond to emergencies, and becomes a reliable black start power source point.

[0051] Furthermore, the black start simulation test system of the hydropower station with the plant hydro-generator provided by this invention can conduct black start tests under the condition that the second 220 kV line and the first 220 kV line are not powered off. Because the charging impact of the short-distance transmission line less than 50 km is small, that is, when black starting and restoring to the second 220 kV bus on this side, it is equivalent to the line restoring power supply. This invention is especially applicable to the short-distance transmission system less than 50 km. While verifying the black start ability of the first 10 kV hydro-generator, it can also reduce the power outage range of the normal operating power grid. Brief Description of the Drawings

[0052] Figure 1 It is a schematic diagram of the principle of the black start system of this invention.

[0053] Figure 2 It is a schematic diagram of the principle of the system before black start of this invention.

[0054] Figure 3 It is a schematic diagram of the black start isolation switch operation of this invention.

[0055] Figure 4 It is a schematic diagram of the black start with bus charging of this invention.

[0056] In the figure: 400V hydrogenerator 1; emergency air switch 2; second 400V auxiliary bus 3; first 10kV hydrogenerator 4; first outlet breaker 5; first 10kV disconnecting switch 6; first main transformer 7; first 220kV breaker 8; first 220kV disconnecting switch 9; second 220kV bus 10; first bus tie disconnecting switch 11; 220kV bus tie breaker 12; second bus tie disconnecting switch 13; first 220kV bus 14; second 220kV disconnecting switch 15; third 400V auxiliary bus 16; first 400V tie switch 17; first 400V tie disconnecting switch 18; first 400V auxiliary bus 19; first 400V disconnecting switch 20; first 400V switch 21; second 400V disconnecting switch 22; first 400V auxiliary transformer 23; second 10kV disconnecting switch 24; third 10kV disconnecting switch 25; first 10kV breaker 26; fourth 10kV disconnecting switch 27; fifth 10kV disconnecting switch 28; first auxiliary 10kV isolating transformer 29; second 10kV breaker 30; sixth 10kV disconnecting switch 31; first 10kV auxiliary bus 32; seventh 10kV disconnecting switch 33; third 10kV breaker 34; standby transformer 35; second 400V tie disconnecting switch 36; second 400V tie switch 37; third 400V tie disconnecting switch 38; third 400V disconnecting switch 39; second 400V switch 40; fourth 400V disconnecting switch 41; second 400V auxiliary transformer 42; eighth 10kV disconnecting switch 43; ninth 10kV disconnecting switch 44; fourth 10kV breaker 45; tenth 10kV disconnecting switch 46; eleventh 10kV disconnecting switch 47; second auxiliary 10kV isolating transformer 48; fifth 10kV breaker 49; twelfth 10kV disconnecting switch 50; second 10kV auxiliary bus 51; first 10kV tie disconnecting switch 52; 10kV tie breaker 53; second 10kV tie disconnecting switch 54; second 10kV hydrogenerator 55; second outlet breaker 56; thirteenth 10kV disconnecting switch 57; second main transformer 58; second 220kV breaker 59; third 220kV disconnecting switch 60; fourth 220kV disconnecting switch 61; fifth 220kV disconnecting switch 62; sixth 220kV disconnecting switch 63; third 220kV breaker 64; seventh 220kV disconnecting switch 65; second 220kV line 66; eighth 220kV disconnecting switch 67; ninth 220kV disconnecting switch 68; fourth 220kV breaker 69; tenth 220kV disconnecting switch 70; first 220kV line 71. Detailed implementation manners

[0057] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations rather than limitations of the present invention.

[0058] The present invention can solve the problems that the black start of a hydropower station must use a diesel generator, currently the hydropower station does not have a 400V station service water turbine for black start, and the black start test cannot be carried out with the line de-energized.

[0059] A black start simulation test system and method for a hydropower station with a station service water turbine generator of the present invention includes a 400V water turbine generator, a second 400V station service bus, a first 10kV water turbine generator, a first main transformer, and a second 220kV bus; under the condition that the second 220kV line and the first 220kV line cannot be de-energized, it is simulated that when the voltage of the second 220kV bus is completely lost, the first 10kV water turbine generator set does not rely on any external power source, and only relies on the 400V water turbine generator set to drive the auxiliary equipment of the second 400V station service bus to operate, complete the start-up procedure of starting, constant speed, generator excitation, and stator voltage build-up of the first 10kV water turbine generator, establish a frequency-stable and correctly indicated voltage for the second 220kV bus on this side, verify the black start ability of the first 10kV water turbine generator set, and can provide an environmentally friendly black start power source for the power grid; by configuring a 400V station service water turbine generator, it can replace the diesel generator of the black start power source, and carry out the black start test with the outgoing line de-energized, and verify that the hydropower station has the black start ability required by the power grid under the condition of power failure.

[0060] A black start simulation test system for a hydropower station with a station service water turbine generator of the present invention, as Figure 1 shown, includes a 400V water turbine generator 1, a security air switch 2, a second 400V station service bus 3, a first 10kV water turbine generator 4, a first outlet circuit breaker 5, a first 10kV disconnecting switch 6, a first main transformer 7, a first 220kV circuit breaker 8, a first 220kV disconnecting switch 9, and a second 220kV bus 10; wherein the 400V water turbine generator 1 is connected to the second 400V station service bus 3 through the security air switch 2, and the first 10kV water turbine generator 4 is sequentially connected to the second 220kV bus 10 through the first outlet circuit breaker 5, the first 10kV disconnecting switch 6, the first main transformer 7, the first 220kV circuit breaker 8, and the first 220kV disconnecting switch 9; the 400V water turbine generator 1 is used to provide power for the auxiliary equipment of the second 400V station service bus 3 of the first 10kV water turbine generator 4.

[0061] In this embodiment, it further includes a first bus coupler disconnecting switch 11, a 220 kV bus coupler circuit breaker 12, a second bus coupler disconnecting switch 13, a first 220 kV bus 14, a second 220 kV disconnecting switch 15, a third 400 V auxiliary bus 16, a first 400 V tie switch 17, a first 400 V tie disconnecting switch 18, a first 400 V auxiliary bus 19, a first 400 V disconnecting switch 20, a first 400 V switch 21, a second 400 V disconnecting switch 22, a first 400 V auxiliary transformer 23, a second 10 kV disconnecting switch 24, a third 10 kV disconnecting switch 25, a first 10 kV circuit breaker 26, a fourth 10 kV disconnecting switch 27, a fifth 10 kV disconnecting switch 28, a first auxiliary 10 kV isolating transformer 29, a second 10 kV circuit breaker 30, a sixth 10 kV disconnecting switch 31, a first 10 kV auxiliary bus 32, a seventh 10 kV disconnecting switch 33, a third 10 kV circuit breaker 34, a standby transformer 35, a second 400 V tie disconnecting switch 36, a second 400 V tie switch 37 and a third 400 V tie disconnecting switch 38; wherein, one end of the first bus coupler disconnecting switch 11 is connected to the second 220 kV bus 10, and the other end is connected to the first 220 kV bus 14 via the 220 kV bus coupler circuit breaker 12 and the second bus coupler disconnecting switch 13; one end of the second 220 kV disconnecting switch 15 is connected to the first 220 kV bus 14, and the other end is connected to the common point between the first 220 kV circuit breaker 8 and the first 220 kV disconnecting switch 9; the third 400 V auxiliary bus 16 is connected to the first 10 kV auxiliary bus 32 in sequence via the first 400 V tie switch 17, the first 400 V tie disconnecting switch 18, the first 400 V auxiliary bus 19, the first 400 V disconnecting switch 20, the first 400 V switch 21, the second 400 V disconnecting switch 22, the first 400 V auxiliary transformer 23, the second 10 kV disconnecting switch 24, the fifth 10 kV disconnecting switch 28, the first auxiliary 10 kV isolating transformer 29, the second 10 kV circuit breaker 30 and the sixth 10 kV disconnecting switch 31; the first 10 kV auxiliary bus 32 is connected to the third 400 V auxiliary bus 16 in sequence via the seventh 10 kV disconnecting switch 33, the third 10 kV circuit breaker 34 and the standby transformer 35; one end of the fourth 10 kV disconnecting switch 27 is connected to the common point between the first outlet circuit breaker 5 and the first 10 kV disconnecting switch 6, and the other end is connected to the common point between the second 10 kV disconnecting switch 24 and the fifth 10 kV disconnecting switch 28 via the first 10 kV circuit breaker 26; one end of the second 400 V tie disconnecting switch 36 is connected to the third 400 V auxiliary bus 16, and the other end is connected to the second 400 V auxiliary bus 3 via the second 400 V tie switch 37 and the third 400 V tie disconnecting switch 38.

[0062] In this embodiment, it further includes a third 400V disconnect switch 39, a second 400V switch 40, a fourth 400V disconnect switch 41, a second 400V auxiliary transformer 42, an eighth 10kV disconnect switch 43, a ninth 10kV disconnect switch 44, a fourth 10kV circuit breaker 45, a tenth 10kV disconnect switch 46, an eleventh 10kV disconnect switch 47, a second 10kV auxiliary isolation transformer 48, a fifth 10kV circuit breaker 49, a twelfth 10kV disconnect switch 50, a second 10kV auxiliary bus 51, a first 10kV tie disconnect switch 52, a 10kV tie circuit breaker 53, a second 10kV tie disconnect switch 54, a second 10kV hydro-generator 55, a second outlet circuit breaker 56, a thirteenth 10kV disconnect switch 57, a second main transformer 58, a second 220kV circuit breaker 59, a third 220kV disconnect switch 60, a fourth 220kV disconnect switch 61, a fifth 220kV disconnect switch 62, a sixth 220kV disconnect switch 63, a third 220kV circuit breaker 64, a seventh 220kV disconnect switch 65, a second 220kV line 66, an eighth 220kV disconnect switch 67, a ninth 220kV disconnect switch 68, a fourth 220kV circuit breaker 69, a tenth 220kV disconnect switch 70, a first 220kV line 71; wherein, one end of the third 400V disconnect switch 39 is connected to the second 400V auxiliary bus 3, and the other end is connected to the second 10kV auxiliary bus 51 through the third 400V disconnect switch 39, the second 400V switch 40, the fourth 400V disconnect switch 41, the second 400V auxiliary transformer 42, the eighth 10kV disconnect switch 43, the eleventh 10kV disconnect switch 47, the second 10kV auxiliary isolation transformer 48, the fifth 10kV circuit breaker 49 and the twelfth 10kV disconnect switch 50 in sequence; the second 10kV hydro-generator 55 is connected to the second 220kV bus 10 through the second outlet circuit breaker 56, the thirteenth 10kV disconnect switch 57, the second main transformer 58 and the second 220kV circuit breaker 59 in sequence, one end of the fourth 220kV disconnect switch 61 is connected to the first 220kV bus 14, and the other end is connected to the common point between the second 220kV circuit breaker 59 and the third 220kV disconnect switch 60; one end of the third 400V disconnect switch 39 is connected to the second 400V auxiliary bus 3, and the other end is connected to the second 10kV auxiliary bus 51 through the second 400V switch 40, the fourth 400V disconnect switch 41, the second 400V auxiliary transformer 42, the eighth 10kV disconnect switch 43, the eleventh 10kV disconnect switch 47, the second 10kV auxiliary isolation transformer 48, the fifth 10kV circuit breaker 49 and the twelfth 10kV disconnect switch 50 in sequence, one end of the tenth 10kV disconnect switch 46 is connected to the common point between the second outlet circuit breaker 56 and the thirteenth 10kV disconnect switch 57, and the other end is connected to the common point between the eighth 10kV disconnect switch 43 and the eleventh 10kV disconnect switch 47 through the fourth 10kV circuit breaker 45 and the ninth 10kV disconnect switch 44;One end of the fifth 220 kV disconnecting switch 62 is connected to the second 220 kV bus 10, and the other end is connected to the first 220 kV bus 14 via the sixth 220 kV disconnecting switch 63. One end of the third 220 kV circuit breaker 64 is connected to the common point between the fifth 220 kV disconnecting switch 62 and the sixth 220 kV disconnecting switch 63, and the other end is connected to the second 220 kV line 66 via the third 220 kV circuit breaker 64 and the seventh 220 kV disconnecting switch 65; One end of the eighth 220 kV disconnecting switch 67 is connected to the second 220 kV bus 10, and the other end is connected to the first 220 kV bus 14 via the ninth 220 kV disconnecting switch 68. One end of the fourth 220 kV circuit breaker 69 is connected to the common point between the eighth 220 kV disconnecting switch 67 and the ninth 220 kV disconnecting switch 68, and the other end is connected to the first 220 kV line 71 via the fourth 220 kV circuit breaker 69, the tenth 220 kV disconnecting switch 70. ;

[0063] In this embodiment, the rated output voltage of the 400 V hydro-generator 1 is 400 V, the rated output voltage of the first 10 kV hydro-generator 4 is 10.5 kV, the turns ratio of the first main transformer 7 is 242 kV / 10.5 kV, the turns ratio of the first 400 V auxiliary transformer 23, the standby transformer 35 and the second 400 V auxiliary transformer 42 is 10.5 kV / 0.4 kV, and the turns ratio of the first 10 kV auxiliary isolating transformer 29 and the second 10 kV auxiliary isolating transformer 48 is 10.5 kV / 10.5 kV.

[0064] In this embodiment, the parameters of the first 10 kV hydro-generator 4 and the second 10 kV hydro-generator 55 are as follows in the table:

[0065]

[0066] In this embodiment, the parameters of the first main transformer 7 and the second main transformer 58 are as follows in the table:

[0067]

[0068]

[0069] In this embodiment, the parameters of the first 10 kV auxiliary isolating transformer 29 and the second 10 kV auxiliary isolating transformer 48 are as follows in the table:

[0070]

[0071] In this embodiment, the parameters of the first 400 V auxiliary transformer 23 and the second 400 V auxiliary transformer 42 are as follows in the table:

[0072]

[0073] In this embodiment, the parameters of the standby transformer 35 are as follows in the table:

[0074]

[0075] Such as Figure 2As shown, before the black start of the first 10 kV hydrogenerator 4 and the first main transformer 7 with the second 220 kV bus 10, the security air switch 2, the second 220 kV disconnecting switch 15, the first 400 V tie switch 17, the third 10 kV circuit breaker 34, the second 400 V tie switch 37, the 10 kV tie circuit breaker 53, the third 220 kV disconnecting switch 60, the sixth 220 kV disconnecting switch 63, and the eighth 220 kV disconnecting switch 67 are all in the open state; the first outlet circuit breaker 5, the first 10 kV disconnecting switch 6, the first 220 kV circuit breaker 8, the first 220 kV disconnecting switch 9, the first bus tie disconnecting switch 11, the 220 kV bus tie circuit breaker 12, the second bus tie disconnecting switch 13, the first 400 V tie disconnecting switch 18, the first 400 V disconnecting switch 20, the first 400 V switch 21, the second 400 V disconnecting switch 22, the second 10 kV disconnecting switch 24, the third 10 kV disconnecting switch 25, the first 10 kV circuit breaker 26, the fourth 10 kV disconnecting switch 27, the fifth 10 kV disconnecting switch 28, the second 10 kV circuit breaker 30, the sixth 10 kV disconnecting switch 31, the seventh 10 kV disconnecting switch 33, the second 400 V tie disconnecting switch 36, the third 400 V tie disconnecting switch 38, the third 400 V disconnecting switch 39, the second 400 V switch 40, the fourth 400 V disconnecting switch 41, the eighth 10 kV disconnecting switch 43, the ninth 10 kV disconnecting switch 44, the fourth 10 kV circuit breaker 45, the tenth 10 kV disconnecting switch 46, the eleventh 10 kV disconnecting switch 47, the fifth 10 kV circuit breaker 49, the twelfth 10 kV disconnecting switch 50, the first 10 kV tie disconnecting switch 52, the second 10 kV tie disconnecting switch 54, the second outlet circuit breaker 56, the thirteenth 10 kV disconnecting switch 57, the second 220 kV circuit breaker 59, the fourth 220 kV disconnecting switch 61, the fifth 220 kV disconnecting switch 62, the third 220 kV circuit breaker 64, the seventh 220 kV disconnecting switch 65, the ninth 220 kV disconnecting switch 68, the fourth 220 kV circuit breaker 69, and the tenth 220 kV disconnecting switch 70 are all in the closed state; the terminal voltages of the first 10 kV hydrogenerator 4 and the second 10 kV hydrogenerator 55 are 10.5 kV, the second 220 kV line 66 and the first 220 kV line 71 are in the live operation state, the first 10 kV auxiliary bus 32 and the second 10 kV auxiliary bus 51 are in the live operation state, the second 400 V auxiliary bus 3, the first 400 V auxiliary bus 19, the first 400 V auxiliary transformer 23, the second 400 V auxiliary transformer 42, the first auxiliary 10 kV isolating transformer 29, the second auxiliary 10 kV isolating transformer 48, the second 220 kV bus 10, the first 220 kV bus 14, the first main transformer 7, and the second main transformer 58 are all in the live operation state, and the third 400 V auxiliary bus 16 and the standby transformer 35 are in the hot standby state.

[0076] As Figure 3As shown, after the black start isolation switching operation of the first 10 kV hydrogenerator 4 and the first main transformer 7 with the second 220 kV bus 10, the second 10 kV circuit breaker 30, the first 400 V switch 21, the first 10 kV circuit breaker 26, the second 400 V switch 40, the third 400 V tie disconnecting switch 38, the first outlet circuit breaker 5, the first 220 kV circuit breaker 8, the fifth 220 kV disconnecting switch 62, and the 220 kV bus-tie circuit breaker 12 are all in the open state; the 10 kV tie circuit breaker 53, the third 10 kV circuit breaker 34, the first 400 V tie switch 17, and the sixth 220 kV disconnecting switch 63 are all in the closed state.

[0077] As Figure 4 shown, during the black start test of the first 10 kV hydrogenerator 4 and the first main transformer 7 with the second 220 kV bus 10, the terminal voltage of the 400 V hydrogenerator 1 builds up to 400 V, and the emergency air switch 2, the first outlet circuit breaker 5, and the first 220 kV circuit breaker 8 are all in the closed state.

[0078] A method for simulating the black start test of a hydropower station with a plant hydrogenerator includes the following steps:

[0079] 1) Conduct the black start isolation switching operation of the first 10 kV hydrogenerator 4 and the first main transformer 7 with the second 220 kV bus 10, and proceed to step 2);

[0080] 2) Start the 400 V hydrogenerator 1 and build up the voltage until Uab, Uac, and Ubc are all 400 V and the frequency f is 50 Hz, measure and confirm that its phase sequence is correct, and proceed to step 3);

[0081] 3) Close the emergency air switch 2, and the second 400 V plant bus 3 is powered by the 400 V hydrogenerator 1, and proceed to step 4);

[0082] 4) Open the guide vane of the first 10 kV hydrogenerator 4 and set the speed to 214.3 r / min, and proceed to step 5);

[0083] 5) The first 10 kV hydrogenerator 4 performs zero-start voltage boosting with the first main transformer, and the first 10 kV hydrogenerator 4 is excited to build up voltage, and proceed to step 6);

[0084] 6) The first 10 kV hydrogenerator 4 builds up the voltage to 20% of the rated voltage, and proceed to step 7);

[0085] 7) The first 10 kV hydrogenerator 4 builds up the voltage to 50% of the rated voltage, and proceed to step 8);

[0086] 8) The first 10 kV hydro-generator 4 builds up voltage to 100% of the rated voltage, with a frequency of 50 Hz, and proceeds to step 9);

[0087] 9) Close the first 220 kV circuit breaker 8. The voltage of the second 220 kV bus 10 is 220 kV, and proceed to step 10);

[0088] 10) Open the first outlet circuit breaker 5 and the first 220 kV circuit breaker 8. The black start test of the first 10 kV hydro-generator 4 and the first main transformer 7 with the second 220 kV bus 10 ends.

[0089] In this embodiment, 101) Check and confirm that the 10 kV tie circuit breaker 53 is in the open state, and proceed to step 102);

[0090] 102) Open the second 10 kV circuit breaker 30, close the 10 kV tie circuit breaker 53, and proceed to step 103);

[0091] 103) Open the first 400 V switch 21, close the third 10 kV circuit breaker 34, close the first 400 V tie switch 17, open the first outlet circuit breaker 5, and proceed to step 104);

[0092] 104) Open the first 10 kV circuit breaker 26, check and confirm that the second 400 V tie switch 37 is in the open state, open the third 400 V tie disconnecting switch 38, open the second 400 V switch 40, and proceed to step 105);

[0093] 105) Open the first 220 kV circuit breaker 8, close the sixth 220 kV disconnecting switch 63, open the fifth 220 kV disconnecting switch 62, and proceed to step 106);

[0094] 106) Open the 220 kV bus tie circuit breaker 12. The first 10 kV hydro-generator 4 is in the shutdown state. The second 400 V auxiliary bus 3 has no voltage. The second 220 kV bus 10 has no voltage. The black start isolation switching operation of the 400 V hydro-generator 1 and the first main transformer 7 with the second 220 kV bus 10 ends.

[0095] The above is only a preferred embodiment of the present invention patent, and does not impose any limitation on the present invention patent. Any simple modification, change, and equivalent structural change made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A black start simulation test system for a hydropower station with a plant water turbine generator, characterized in that It includes a 400V hydrogenerator (1), a second 400V auxiliary busbar (3), a first 10kV hydrogenerator (4) and a second 220kV busbar (10); The 400V hydrogenerator (1) is connected to the second 400V auxiliary busbar (3) via a security air switch (2); The first 10kV hydrogenerator (4) is connected to the second 220kV busbar (10) successively via a first outlet circuit breaker (5), a first 10kV disconnecting switch (6), a first main transformer (7), a first 220kV circuit breaker (8) and a first 220kV disconnecting switch (9); The 400V hydrogenerator (1) is used to supply power to the auxiliaries of the second 400V auxiliary busbar (3) of the first 10kV hydrogenerator (4); It further includes a first bus coupler disconnecting switch (11), a first 220kV busbar (14), a second 220kV disconnecting switch (15), a third 400V auxiliary busbar (16), a third 10kV disconnecting switch (25), a first 10kV circuit breaker (26), a fourth 10kV disconnecting switch (27), a first 10kV auxiliary busbar (32) and a second 400V tie disconnecting switch (36); One end of the first bus coupler disconnecting switch (11) is connected to the second 220kV busbar (10), and the other end is connected to the first 220kV busbar (14) via a 220kV bus coupler circuit breaker (12) and a second bus coupler disconnecting switch (13); One end of the second 220kV disconnecting switch (15) is connected to the first 220kV busbar (14), and the other end is connected to the common point between the first 220kV circuit breaker (8) and the first 220kV disconnecting switch (9); The third 400V auxiliary busbar (16) is connected to the first 10kV auxiliary busbar (32) successively via a first 400V tie switch (17), a first 400V tie disconnecting switch (18), a first 400V auxiliary busbar (19), a first 400V disconnecting switch (20), a first 400V switch (21), a second 400V disconnecting switch (22), a first 400V auxiliary transformer (23), a second 10kV disconnecting switch (24), a fifth 10kV disconnecting switch (28), a first auxiliary 10kV isolating transformer (29), a second 10kV circuit breaker (30) and a sixth 10kV disconnecting switch (31); The first 10kV auxiliary busbar (32) is connected to the third 400V auxiliary busbar (16) successively via a seventh 10kV disconnecting switch (33), a third 10kV circuit breaker (34) and a standby transformer (35); One end of the fourth 10kV disconnecting switch (27) is connected to the common point between the first outlet circuit breaker (5) and the first 10kV disconnecting switch (6), and the other end is connected to the common point between the second 10kV disconnecting switch (24) and the fifth 10kV disconnecting switch (28) via the first 10kV circuit breaker (26); One end of the second 400V tie disconnect switch (36) is connected to the third 400V auxiliary bus (16), and the other end is connected to the second 400V auxiliary bus (3) via the second 400V tie switch (37) and the third 400V tie disconnect switch (38).

2. The black start simulation test system for a factory water turbine generator according to claim 1, characterized in that, It also includes a third 400V disconnect switch (39), a tenth 10kV disconnect switch (46), a second 10kV auxiliary bus (51), a first 10kV tie disconnect switch (52), a 10kV tie circuit breaker (53), a second 10kV tie disconnect switch (54), a second 10kV hydro-generator (55), a fourth 220kV disconnect switch (61), a fifth 220kV disconnect switch (62), a third 220kV circuit breaker (64), a second 220kV line (66), an eighth 220kV disconnect switch (67), a fourth 220kV circuit breaker (69), and a first 220kV line (71); One end of the third 400V disconnect switch (39) is connected to the second 400V auxiliary bus (3), and the other end is connected to the second 10kV auxiliary bus (51) successively via a second 400V switch (40), a fourth 400V disconnect switch (41), a second 400V auxiliary transformer (42), an eighth 10kV disconnect switch (43), an eleventh 10kV disconnect switch (47), a second auxiliary 10kV isolating transformer (48), a fifth 10kV circuit breaker (49), and a twelfth 10kV disconnect switch (50); The second 10kV hydro-generator (55) is connected to the second 220kV bus (10) successively via a second outlet circuit breaker (56), a thirteenth 10kV disconnect switch (57), a second main transformer (58), a second 220kV circuit breaker (59), and a third 220kV disconnect switch (60); One end of the fourth 220kV disconnect switch (61) is connected to the first 220kV bus (14), and the other end is connected to the common point between the second 220kV circuit breaker (59) and the third 220kV disconnect switch (60); One end of the tenth 10kV disconnect switch (46) is connected to the common point between the second outlet circuit breaker (56) and the thirteenth 10kV disconnect switch (57), and the other end is connected to the common point between the eighth 10kV disconnect switch (43) and the eleventh 10kV disconnect switch (47) via a fourth 10kV circuit breaker (45) and a ninth 10kV disconnect switch (44); One end of the fifth 220kV disconnect switch (62) is connected to the second 220kV bus (10), and the other end is connected to the first 220kV bus (14) via a sixth 220kV disconnect switch (63); One end of the third 220kV circuit breaker (64) is connected to the common point between the fifth 220kV disconnect switch (62) and the sixth 220kV disconnect switch (63), and the other end is connected to the second 220kV line (66) via the third 220kV circuit breaker (64) and a seventh 220kV disconnect switch (65); One end of the eighth 220 kV disconnecting switch (67) is connected to the second 220 kV busbar (10), and the other end is connected to the first 220 kV busbar (14) via the ninth 220 kV disconnecting switch (68). One end of the fourth 220 kV circuit breaker (69) is connected to the common point between the eighth 220 kV disconnecting switch (67) and the ninth 220 kV disconnecting switch (68), and the other end is connected to the first 220 kV line (71) via the tenth 220 kV disconnecting switch (70).

3. The black start simulation test system for a factory water turbine generator according to claim 2, characterized in that, The rated output voltage of the 400 V hydrogenerator (1) is 400 V, the rated output voltage of the first 10 kV hydrogenerator (4) is 10.5 kV, the turns ratio of the first main transformer (7) is 242 kV / 10.5 kV, and the turns ratios of the first 400 V auxiliary transformer (23), the standby transformer (35), and the second 400 V auxiliary transformer (42) are 10.5 kV / 0.4 kV. The turns ratios of the first 10 kV auxiliary isolating transformer (29) and the second 10 kV auxiliary isolating transformer (48) are 10.5 kV / 10.5 kV.

4. The hydroelectric power station black start simulation test system for a factory water turbine generator according to claim 2, characterized in that, Before the first 10 kV hydro-generator (4) and the first main transformer (7) start black-starting with the second 220 kV busbar (10), the security air switch (2), the second 220 kV disconnecting switch (15), the first 400 V tie switch (17), the third 10 kV circuit breaker (34), the second 400 V tie switch (37), the 10 kV tie circuit breaker (53), the third 220 kV disconnecting switch (60), the sixth 220 kV disconnecting switch (63), and the eighth 220 kV disconnecting switch (67) are all in the open state; the first outlet circuit breaker (5), the first 10 kV disconnecting switch (6), the first 220 kV circuit breaker (8), the first 220 kV disconnecting switch (9), the first bus coupler disconnecting switch (11), the 220 kV bus coupler circuit breaker (12), the second bus coupler disconnecting switch (13), the first 400 V tie disconnecting switch (18), the first 400 V disconnecting switch (20), the first 400 V switch (21), the second 400 V disconnecting switch (22), the second 10 kV disconnecting switch (24), the third 10 kV disconnecting switch (25), the first 10 kV circuit breaker (26), the fourth 10 kV disconnecting switch (27), the fifth 10 kV disconnecting switch (28), the second 10 kV circuit breaker (30), the sixth 10 kV disconnecting switch (31), the seventh 10 kV disconnecting switch (33), the second 400 V tie disconnecting switch (36), the third 400 V tie disconnecting switch (38), the third 400 V disconnecting switch (39), the second 400 V switch (40), the fourth 400 V disconnecting switch (41), the eighth 10 kV disconnecting switch (43), the ninth 10 kV disconnecting switch (44), the fourth 10 kV circuit breaker (45), the tenth 10 kV disconnecting switch (46), the eleventh 10 kV disconnecting switch (47), the fifth 10 kV circuit breaker (49), the twelfth 10 kV disconnecting switch (50), the first 10 kV tie disconnecting switch (52), the second 10 kV tie disconnecting switch (54), the second outlet circuit breaker (56), the thirteenth 10 kV disconnecting switch (57), the second 220 kV circuit breaker (59), the fourth 220 kV disconnecting switch (61), the fifth 220 kV disconnecting switch (62), the third 220 kV circuit breaker (64), the seventh 220 kV disconnecting switch (65), the ninth 220 kV disconnecting switch (68), the fourth 220 kV circuit breaker (69), and the tenth 220 kV disconnecting switch (70) are all in the closed state; the terminal voltages of the first 10 kV hydro-generator (4) and the second 10 kV hydro-generator (55) are 10.5 kV, the second 220 kV line (66) and the first 220 kV line (71) are in the live operation state, the first 10 kV auxiliary bus (32) and the second 10 kV auxiliary bus (51) are in the live operation state, the second 400 V auxiliary bus (3), the first 400 V auxiliary bus (19), the first 400 V auxiliary transformer (23), the second 400 V auxiliary transformer (42), the first 10 kV auxiliary isolating transformer (29), the second 10 kV auxiliary isolating transformer (48), the second 220 kV bus (10), the first 220 kV bus (14), the first main transformer (7), and the second main transformer (58) are all in the live operation state, and the third 400 V auxiliary bus (16) and the standby transformer (35) are in the hot standby state.

5. The hydroelectric power station black start simulation test system for a factory water turbine generator according to claim 4, characterized in that, After the black start isolation switching operation of the second 220 kV busbar (10) is carried out by the first 10 kV hydrogenerator (4) and the first main transformer (7), the second 10 kV circuit breaker (30), the first 400 V switch (21), the first 10 kV circuit breaker (26), the second 400 V switch (40), the third 400 V tie disconnecting switch (38), the first outlet circuit breaker (5), the first 220 kV circuit breaker (8), the fifth 220 kV disconnecting switch (62), and the 220 kV bus-coupling circuit breaker (12) are all in the open state; the 10 kV tie circuit breaker (53), the third 10 kV circuit breaker (34), the first 400 V tie switch (17), and the sixth 220 kV disconnecting switch (63) are all in the closed state.

6. The black start simulation test system for a plant hydrogenerator according to claim 5, wherein, During the black start test of the second 220 kV busbar (10) by the first 10 kV hydrogenerator (4) and the first main transformer (7), the terminal voltage of the 400 V hydrogenerator (1) is built up to 400 V, and the emergency air switch (2), the first outlet circuit breaker (5), and the first 220 kV circuit breaker (8) are all in the closed state.

7. A method for simulating the black start test of a hydropower station with a factory water turbine generator, characterized in that, The system according to any one of claims 1-6 includes the following steps: 1) Perform the black start isolation switching operation of the second 220 kV busbar (10) by the first 10 kV hydrogenerator (4) and the first main transformer (7), and proceed to step 2); 2) Start the 400 V hydrogenerator (1), and build up the voltage until Uab, Uac, and Ubc are all 400 V and the frequency f is 50 Hz. Measure and confirm that its phase sequence is correct, and proceed to step 3); 3) Close the emergency air switch (2), and the second 400 V auxiliary busbar (3) is powered by the 400 V hydrogenerator (1), and proceed to step 4); 4) Open the guide vane of the first 10 kV hydrogenerator (4) and set the speed to 214.3 r / min, and proceed to step 5); 5) The first 10 kV hydro-generator (4) is boosted from zero voltage while connected to the first main transformer, the first 10 kV hydro-generator (4) is excited to build voltage, and step 6) is entered; 6) The first 10 kV hydro-generator (4) builds voltage to 20% of the rated voltage, and step 7) is entered; 7) The first 10 kV hydro-generator (4) builds voltage to 50% of the rated voltage, and step 8) is entered; 8) The first 10 kV hydro-generator (4) builds voltage to 100% of the rated voltage and the frequency is 50 Hz, and step 9) is entered; 9) Close the first 220 kV circuit breaker (8), the voltage of the second 220 kV bus (10) is 220 kV, and step 10) is entered; 10) Open the first outlet circuit breaker (5) and the first 220 kV circuit breaker (8), and the black start test of the first 10 kV hydro-generator (4) and the first main transformer (7) while powering the second 220 kV bus (10) is completed.

8. A method for simulating the black start test of a hydropower station with a factory water turbine generator according to claim 7, characterized in that, Step 1) includes the following steps: 101) Check and confirm that the 10 kV tie circuit breaker (53) is in the open state, and step 102) is entered; 102) Open the second 10 kV circuit breaker (30), close the 10 kV tie circuit breaker (53), and step 103) is entered; 103) Open the first 400 V switch (21), close the third 10 kV circuit breaker (34), close the first 400 V tie switch (17), open the first outlet circuit breaker (5), and step 104) is entered; 104) Open the first 10 kV circuit breaker (26), check and confirm that the second 400 V tie switch (37) is in the open state, open the third 400 V tie disconnecting switch (38), open the second 400 V switch (40), and step 105) is entered; 105) Open the first 220 kV circuit breaker (8), close the sixth 220 kV disconnecting switch (63), open the fifth 220 kV disconnecting switch (62), and step 106) is entered; 106) Open the 220 kV bus-tie circuit breaker (12), the first 10 kV hydro-generator (4) is in the shutdown state, the second 400 V auxiliary bus (3) has no voltage, the second 220 kV bus (10) has no voltage, and the black start isolation switching operation of the 400 V hydro-generator (1) and the first main transformer (7) while powering the second 220 kV bus (10) is completed.

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