A wind turbine generator unit networking black start system, method, storage medium and device

Abstract

The application discloses a wind turbine unit networked black start system and method, a storage medium and equipment, and belongs to the technical field of power system transmission and distribution, and comprises an energy storage module, a main converter, a generator unit and a main control module; wherein the energy storage module is electrically connected with an input end AC bus of the main converter, the main converter is in communication connection with the main control module, the generator unit is electrically connected with the input end AC bus of the main converter, the main control module is in communication connection with the energy storage module, and the main control module is also in communication connection with the generator unit. The black start system of the energy storage topology configured at the main converter side can adapt to battery stacks of different DC voltage grades and reduce the energy storage cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power system transmission and distribution, and in particular to a wind turbine generator system network black start system, method, storage medium and equipment. BACKGROUND

[0002] Black start is an important concept in the power system, which refers to the process of restoring power supply by the self-starting generator set in the system after the power system is completely shut down due to failure without relying on external power supply. This process includes starting the self-starting generator set, and then driving the non-self-starting generator set, gradually expanding the scope of system recovery, and finally realizing the recovery of the entire power system.

[0003] At present, the demand for new energy power generation makes the unit rectifier adopt large-capacity multi-level topology. With the increasingly stringent requirements of grid-connected guide and unit reliability, the use of full-power converter by large-capacity new energy units is the trend. The main converter of large-capacity units is generally arranged in parallel, and the DC bus between the main converters is isolated to ensure the reduced power operation under fault. The arrangement of energy storage in the DC bus hinders the sharing of batteries, and increases the difficulty of battery state of charge and health state management.

[0004] The power type energy storage converter arranged at the unit grid side will also be too small due to the converter power, which cannot meet the current impact in the black start microgrid recovery process, increase the apparent power of the converter, and significantly increase the cost of energy storage devices. SUMMARY

[0005] To solve the above problems, the present application provides a wind turbine generator system network black start system, method, storage medium and equipment, which adopts a black start system with a main converter machine side configured with an energy storage topology, can adapt to different DC voltage levels of battery stacks, and reduces the cost of energy storage.

[0006] The above-mentioned object can be achieved by the following scheme:

[0007] The application discloses a wind turbine unit network black start system, which comprises an energy storage module, a main converter, a generator unit and a main control module; the energy storage module is electrically connected with an AC bus of an input end of the main converter, and is used for powering the AC bus of the input end of the main converter, the main converter and an AC bus of an output end of the main converter; the main converter is in communication connection with the main control module, and is used for sending a start signal to the main control module when the voltage of the AC bus of the input end of the main converter and the voltage of the AC bus of the output end of the main converter reach a stable state; the generator unit is electrically connected with the AC bus of the input end of the main converter, and is used for outputting electric energy according to a predetermined power; the main control module is in communication connection with the energy storage module, and is used for powering the system in response to a start command; and the main control module is also in communication connection with the generator unit, and is used for receiving the start signal and controlling the energy storage module and the generator unit to output electric energy according to the predetermined power.

[0008] Optionally, the energy storage module further comprises an energy storage battery, an energy storage converter and an energy storage transformer; the energy storage battery is electrically connected with an input end of the energy storage converter, and is used for delivering a direct current to the energy storage converter; an output end of the energy storage converter is electrically connected with an input end of the energy storage transformer, and is used for converting the direct current delivered by the energy storage battery into an alternating current and delivering the alternating current to the energy storage transformer; and an output end of the energy storage transformer is electrically connected with the AC bus of the input end of the main converter, and is used for receiving the alternating current delivered by the energy storage converter and delivering the alternating current delivered by the energy storage converter to the main converter after voltage boosting.

[0009] Optionally, the main control module is further used for generating and sending a first control signal in response to a start command; and the energy storage converter is also in communication connection with the main control module, and is used for receiving the first control signal and powering the AC bus of the input end of the main converter, the main converter and the AC bus of the output end of the main converter according to the first control signal.

[0010] Optionally, the main converter is further used for establishing a predetermined voltage with a predetermined amplitude and a predetermined frequency on the AC bus of the output end of the main converter.

[0011] Optionally, the main converter is further used for sending the start signal to the main control module when the predetermined voltage reaches a stable state and the direct current bus voltage of the main converter reaches a rated value; the main control module is further used for receiving the start signal and sending a second control signal to the generator unit; and the generator unit is further used for receiving the second control signal and controlling the generator unit to output electric energy according to the predetermined power according to the second control signal.

[0012] Optionally, the main control module is further configured to receive the start signal and send a third control signal to the energy storage converter; the energy storage converter is further configured to receive the third control signal and control the energy storage converter to track the amplitude, frequency and phase of the voltage on the AC bus at the input end of the main converter according to the third control signal; and the energy storage converter is further configured to control the energy storage converter to absorb the electrical energy output by the generator set to charge the energy storage battery according to the third control signal when the power generated by the generator set reaches the predetermined power.

[0013] Optionally, the energy storage converter is further configured to send a standby signal to the main control module when the energy storage battery is fully charged; the main control module is further configured to receive the standby signal and send a fourth control signal to the energy storage converter; and the energy storage converter is further configured to receive the fourth control signal and control the energy storage converter to enter a standby state according to the fourth control signal.

[0014] Based on the same inventive concept, the application further provides a black start method for a wind turbine generator system network, which comprises the following steps: in response to a start command, starting the energy storage converter to supply power to the main converter, the AC bus at the input end of the main converter and the AC bus at the output end of the main converter; when the voltage on the AC bus at the input end of the main converter and the voltage on the AC bus at the output end of the main converter reach a stable state and the DC bus voltage of the main converter reaches a rated value, the main converter sends a start signal to the main control module; the main control module receives the start signal sent by the main converter, generates and sends a second control signal; the generator set receives the second control signal and generates power at a predetermined power; when the power generated by the generator set rises to the predetermined power, the energy storage converter is controlled to absorb the electrical energy output by the generator set to charge the energy storage battery; and when the energy storage battery is fully charged, the energy storage converter enters a standby state, thereby completing the black start of the system.

[0015] Based on the same inventive concept, the application further provides a computer storage medium storing one or more programs, which, when executed, can implement any of the aforementioned methods.

[0016] Based on the same inventive concept, the application further provides a device comprising a processor, a communication interface, a memory and a communication bus; the processor, the communication interface and the memory communicate with each other through the communication bus; and the processor is configured to execute the program stored in the aforementioned computer readable storage medium.

[0017] Compared with the prior art, the application has the following advantages:

[0018] 1. The topology of the main converter machine side configuration energy storage can centrally manage and use the energy storage battery in the unit, improve the reliability of energy storage; at the same time, the topology of the main converter machine side configuration energy storage can adapt to different DC voltage grade battery stack, reduce the cost of energy storage.

[0019] 2. The topology of the main converter machine side configuration energy storage uses small volume and small footprint power type battery. The main converter is network control, which can use the generator of the unit to replace the active power of large volume and large footprint energy type battery.

[0020] 3. The black start method of the main converter machine side configuration energy storage enlarges the apparent power of the main converter of large capacity unit to expand the microgrid range of black start.

[0021] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or can be learned by practice of the present application. The objects and other advantages of the present application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0023] Figure 1 It is a framework diagram of a black start system of a wind turbine generator unit network of an embodiment of the present application.

[0024] Figure 2 It is a structural schematic diagram of a black start system of a wind turbine generator unit network of an embodiment of the present application.

[0025] Figure 3 It is a flow chart of a black start method of a wind turbine generator unit network of an embodiment of the present application.

[0026] Figure 4 It is a structural schematic diagram of an electronic device of an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0028] With reference to Figure 1 An embodiment of the present application provides a black start system of a wind turbine generator unit network, and the black start system of the wind turbine generator unit network is configured with a black start system of a main converter with a storage energy topology, so that a battery stack of different direct current voltage levels can be adapted, and the cost of the storage energy is reduced.

[0029] The system specifically comprises a storage energy module, a main converter, a generator unit and a main control module.

[0030] The storage energy module is electrically connected with an input end alternating current bus of the main converter, and is configured to power on the input end alternating current bus of the main converter, the main converter and an output end alternating current bus of the main converter.

[0031] The main converter is in communication connection with the main control module, and is configured to send a start signal to the main control module when alternating current bus voltages of the input end of the main converter and the output end of the main converter reach a stable state.

[0032] Specifically, the main converter topology can be an alternating current / direct current / alternating current back-to-back, a three-level, a five-level midpoint clamping, a modular multi-level, etc.; filters can be added to the input end and the output end of the main converter, and the filters can have various forms, for example, capacitors, inductors, resistors and various combinations thereof; the main converter is configured with a storage energy topology, and a power type battery with small volume and small land occupation is used; the main converter is a network control, and a generator of the generator unit can be used to replace active power of an energy type battery with large volume and large land occupation.

[0033] The generator unit is electrically connected with the input end alternating current bus of the main converter, and is configured to output electric energy according to a predetermined power.

[0034] Specifically, the number of windings of the generator unit can be three-phase, six-phase, twelve-phase, etc.

[0035] The main control module is in communication connection with the storage energy module, and is configured to control the storage energy module to power on the system in response to a start command.

[0036] The main control module is also in communication connection with the generator unit, and is configured to receive the start signal and control the storage energy module and the generator unit to output electric energy according to the predetermined power.

[0037] Exemplarily, the main control module can be integrated in a server or a workstation of the central monitoring layer, or integrated in a main control cabinet, a field touch screen station or the like of the field control layer; a user sends a start command to the main control module on the host computer of the workstation or in the field main control cabinet, and the main control module starts the energy storage module to power on the main converter, the AC bus at the input end of the main converter and the AC bus at the output end of the main converter; when the AC bus voltage at both ends of the main converter reaches a stable state and the DC bus reaches a rated voltage, the main converter sends a start signal to the main control module; the main control module receives the start signal, generates and sends a second control signal to the generator set, and the generator set starts and generates power at a predetermined power; when the power generated by the generator set rises to the predetermined power, the main control module controls the energy storage module to absorb the power generated by the generator set to charge the energy storage module; when the energy storage module is fully charged, the energy storage module enters a standby state, thereby completing the black start of the system; the black start method of the main converter side configured with energy storage allows the main converter of the large-capacity unit to amplify the apparent power of the energy storage, thereby expanding the microgrid range of the black start.

[0038] Optionally, the energy storage module further comprises an energy storage battery, an energy storage converter and an energy storage transformer;

[0039] The energy storage battery is electrically connected with the input end of the energy storage converter, for delivering a direct current to the energy storage converter;

[0040] Specifically, the energy storage battery can be a battery stack of various voltage levels, such as a 0.4kV battery stack, a 1.0kV battery stack or a 2.0kV battery stack, and the battery stack of different direct current voltage levels reduces the energy storage cost; the battery form of the energy storage battery can be a lead-acid battery, a lithium battery, a flow battery, a fuel cell or a flywheel, and the energy storage battery of different battery forms is centrally managed and used, thereby improving the reliability of the energy storage.

[0041] The output end of the energy storage converter is electrically connected with the input end of the energy storage transformer, for converting the direct current delivered by the energy storage battery into an alternating current and delivering the alternating current to the energy storage transformer;

[0042] Specifically, the number of AC side bridge arms of the energy storage converter can be single-phase, two-phase or three-phase, and the energy storage converter can be connected to the generator set side in a mode of using a transformer for isolation or directly connected to the AC bus at the output end of the generator set.

[0043] The output end of the energy storage transformer is electrically connected with the AC bus at the input end of the main converter, for receiving the alternating current delivered by the energy storage converter and delivering the alternating current delivered by the energy storage converter to the main converter after voltage boosting.

[0044] Exemplarily, the energy storage module electric energy recovery mode can be serial recovery or parallel recovery, etc.; the energy storage converter absorbs the electric energy generated by the generator set to charge the energy storage battery, thereby completing the recovery of the energy storage module electric energy.

[0045] Optionally, the main control module is further configured to generate and send a first control signal in response to a start command;

[0046] The energy storage converter is further in communication connection with the main control module, configured to receive the first control signal, and power on the AC bus at the input end of the main converter, the main converter, and the AC bus at the output end of the main converter according to the first control signal.

[0047] Exemplarily, the user sends a start command to the main control module to start the black start operation, the main control module sends a first control signal to the energy storage converter, the energy storage converter receives the first control signal to start working, the energy storage battery provides electric energy for the inverter side of the energy storage converter, and the inverter side of the energy storage converter establishes an AC voltage on the AC bus at the output end of the generator set, for example, in a 16MW generator set, the AC voltage amplitude is generally between 1100V and 1200V, and the AC voltage frequency is generally between 10Hz and 15Hz; the AC bus at this point can be a U / V / W three-phase power cable at the output end of the generator set.

[0048] Optionally, the main converter is further configured to establish a predetermined voltage of a predetermined amplitude and a predetermined frequency on the AC bus at the output end of the main converter.

[0049] Exemplarily, as shown in Figure 2 The rectifier side of the main converter absorbs AC power on the U / V / W three-phase power cable to convert it into DC power, the rectifier side and the inverter side are connected in parallel with a DC capacitor to realize the function of DC voltage stabilization; the inverter side inversely converts and regulates the rectified DC power from the rectifier side to form an AC power of a predetermined amplitude and a predetermined frequency, and delivers it to the AC bus at the output end of the main converter, which can be an A / B / C three-phase power cable; for example, in a 16MW generator set, the predetermined voltage can be an A / B / C three-phase sinusoidal voltage, the predetermined amplitude of the A / B / C three-phase sinusoidal voltage is generally between 33kV and 66kV, and the predetermined frequency of the A / B / C three-phase sinusoidal voltage is 50Hz.

[0050] Optionally, the main converter is further configured to send the start signal to the main control module when the predetermined voltage reaches a steady state and the DC bus voltage of the main converter reaches a rated value.

[0051] Exemplarily, as shown in Figure 2As shown, the main converter absorbs the power on the U / V / W three-phase power cable through the rectifier side, and charges the main converter DC bus voltage to a rated value, which is a value that can enable the main converter inverter side to have normal working conditions. For example, in a 16MW unit, four main converters are connected in parallel, and the DC bus voltage is generally between 1900V and 2000V; the energy storage converter absorbs the power of the energy storage battery through the inverter side to maintain the amplitude and frequency of the AC voltage on the U / V / W three-phase power cable; the main converter absorbs the power on the U / V / W three-phase power cable through the rectifier side to maintain the amplitude of the DC bus voltage; the main converter absorbs the power on the DC bus through the inverter side to maintain the amplitude and frequency of the A / B / C three-phase sinusoidal voltage; when the amplitude and frequency of the A / B / C three-phase sinusoidal voltage reach a stable state and the DC bus voltage reaches the rated value, the main converter feeds back a start signal to the main control module.

[0052] The main control module is also configured to receive the start signal and send a second control signal to the generator set;

[0053] The generator set is also configured to receive the second control signal and control the generator set to output power according to the predetermined power according to the second control signal.

[0054] For example, after the main control module receives the start signal, it sends a second control signal to the generator set, and after the generator set receives the second control signal, it starts and begins to generate power according to the predetermined power. For example, in a 16MW unit, the predetermined power is generally between 0 and 16MW, and the predetermined power can be 14MW or 15MW.

[0055] Optionally, the main control module is also configured to receive the start signal and send a third control signal to the energy storage converter;

[0056] The energy storage converter is also configured to receive the third control signal and control the energy storage converter to track the amplitude, frequency and phase of the voltage on the AC bus at the input end of the main converter according to the third control signal;

[0057] The energy storage converter is also configured to control the energy storage converter to absorb the power output by the generator set to charge the energy storage battery according to the third control signal when the power output by the generator set reaches the predetermined power.

[0058] Exemplarily, the generator set generates power according to a predetermined power, for example, 16 MW, the power gradually increases from 0 MW to 16 MW, and the generator set enters a stable state when the power is 16 MW; since the capacity of the generator set is far greater than that of the energy storage module, the generator set starts to dominate the amplitude and frequency of the alternating voltage on the U / V / W three-phase power cable after power generation; the energy storage converter switches from grid-forming control to grid-following control, and starts to track the amplitude, frequency and phase of the alternating voltage on the U / V / W three-phase power cable; when the generator set enters the stable state, that is, the power of the generator set reaches the predetermined power, the energy storage converter starts to absorb power from the U / V / W three-phase power cable to charge the energy storage battery.

[0059] Optionally, the energy storage converter is further configured to send a standby signal to the main control module when the energy storage battery is fully charged;

[0060] The main control module is further configured to receive the standby signal and send a fourth control signal to the energy storage converter;

[0061] The energy storage converter is further configured to receive the fourth control signal and control the energy storage converter to enter a standby state according to the fourth control signal.

[0062] Exemplarily, when the energy storage battery is fully charged, the energy storage converter stops absorbing power from the U / V / W three-phase power cable and generates a standby signal to send to the control module; after receiving the standby signal, the control module sends a fourth control signal to the energy storage converter, and the fourth control signal makes the energy storage converter enter a standby state, so that the system completes the black start operation.

[0063] As shown in Figure 3 Based on the same inventive concept, one embodiment of the present application proposes a black start method for a wind turbine generator set grid, which comprises:

[0064] In response to a start command, the energy storage converter is started to power on the main converter, the AC bus at the input end of the main converter, and the AC bus at the output end of the main converter;

[0065] When the AC bus voltage at the input end of the main converter and the AC bus voltage at the output end of the main converter reach a stable state, and the DC bus voltage of the main converter reaches a rated value, the main converter sends a start signal to the main control module;

[0066] The main control module receives the start signal sent by the main converter, generates and sends a second control signal;

[0067] The generator set receives the second control signal and generates power according to a predetermined power;

[0068] When the power generation of the generator set rises to a predetermined power, the energy storage converter is controlled to absorb the electrical energy output by the generator set to charge the energy storage battery;

[0069] When the energy storage battery is fully charged, the energy storage converter enters a standby state, thereby completing the black start of the system.

[0070] Exemplarily, a user sends a start command to the main control module to start the black start operation, the main control module sends a first control signal to the energy storage converter, the energy storage converter receives the first control signal to start working, the energy storage battery provides electrical energy for the inverter side of the energy storage converter, and the inverter side of the energy storage converter establishes an alternating voltage on the alternating current bus at the output end of the generator set; the energy storage converter absorbs the electrical energy of the energy storage battery through the inverter side to maintain the amplitude and frequency of the alternating voltage on the U / V / W three-phase power cable; the main converter absorbs the electrical energy on the U / V / W three-phase power cable through the rectifier side to maintain the amplitude of the direct current bus voltage; the main converter absorbs the electrical energy on the direct current bus through the inverter side to maintain the amplitude and frequency of the A / B / C three-phase sinusoidal voltage; when the amplitude and frequency of the A / B / C three-phase sinusoidal voltage reach a stable state and the direct current bus voltage reaches a rated value, the main converter feeds back a start signal to the main control module; after receiving the start signal, the main control module sends a second control signal to the generator set, the generator set starts after receiving the second control signal, and starts to generate power according to the predetermined power; when the generator set enters a stable state, the energy storage converter starts to absorb electrical energy from the U / V / W three-phase power cable to charge the energy storage battery; when the energy storage battery is fully charged, the energy storage converter stops absorbing electrical energy from the U / V / W three-phase power cable and generates a standby signal to the control module; after receiving the standby signal, the control module sends a fourth control signal to the energy storage converter, the fourth control signal makes the energy storage converter enter a standby state, thereby completing the black start operation of the system.

[0071] Based on the above disclosure, the present application also provides an electronic device. As shown in the Figure 4 The electronic device of the present application comprises at least one processor and at least one storage medium electrically connected, wherein the storage medium is electrically connected with the processor, and the storage medium stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the method as described above.

[0072] Based on the same inventive concept, the present application also provides a storage medium storing instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the method as described above.

[0073] It should be noted that the electrical connection between the various units described above does not necessarily mean that the connection between the lines is connected indirectly, as long as the purpose of the application is achieved, it can be applied to the embodiments of the application.

[0074] The above description is only exemplary embodiments of the present application, and cannot limit the scope of the present application. That is, any equivalent changes and modifications made in accordance with the teachings of the present application are still within the scope of the present application. Other embodiments of the present application will be readily apparent to those skilled in the art upon considering the specification and practice of the true principles disclosed herein. The present application is intended to cover any variations, uses, or adaptive changes of the present application that follow the general principles of the present application and include common knowledge or conventional techniques in the art not described in the present application.

Claims

1. A wind turbine generator system networked black start system, characterized by, The system comprises an energy storage module, a main converter, a generator set, and a main control module, wherein The energy storage module is electrically connected with an input end AC bus of the main converter, for powering the input end AC bus of the main converter, the main converter, and an output end AC bus of the main converter; The main converter is in communication connection with the main control module, for sending a start signal to the main control module when the input end AC bus voltage of the main converter and the output end AC bus voltage of the main converter reach a steady state; The generator set is electrically connected with the input end AC bus of the main converter, for outputting electric energy at a predetermined power; The main control module is in communication connection with the energy storage module, for controlling the energy storage module to power the system in response to a start command; The main control module is also in communication connection with the generator set, for receiving the start signal and controlling the energy storage module and the generator set to output electric energy at the predetermined power; The energy storage module further comprises an energy storage battery, an energy storage converter, and an energy storage transformer; The energy storage battery is electrically connected with an input end of the energy storage converter, for delivering DC current to the energy storage converter; An output end of the energy storage converter is electrically connected with an input end of the energy storage transformer, for converting the DC current delivered by the energy storage battery into AC current and delivering the AC current to the energy storage transformer; An output end of the energy storage transformer is electrically connected with the input end AC bus of the main converter, for receiving the AC current delivered by the energy storage converter and delivering the AC current delivered by the energy storage converter to the main converter after voltage boosting.

2. A black start system for grid connection of a wind turbine generator according to claim 1, characterized in that, The main control module is also used for generating and sending a first control signal in response to a start command; The energy storage converter is also in communication connection with the main control module, for receiving the first control signal and powering the input end AC bus of the main converter, the main converter, and the output end AC bus of the main converter according to the first control signal.

3. A black start system for grid connection of a wind turbine generator according to claim 1, characterized in that, The main converter is also used for establishing a predetermined voltage of a predetermined amplitude and a predetermined frequency on the output end AC bus of the main converter.

4. A black start system for grid connection of a wind power plant according to claim 3, characterized in that, The main converter is also used for sending the start signal to the main control module when the predetermined voltage reaches a steady state and a DC bus voltage of the main converter reaches a rated value; The main control module is also used for receiving the start signal and sending a second control signal to the generator set; The generator set is also used for receiving the second control signal and controlling the generator set to output electric energy at the predetermined power according to the second control signal.

5. A black start system for a wind power plant grid according to claim 1 or 4, characterized in that, The main control module is also used for receiving the start signal and sending a third control signal to the energy storage converter; The energy storage converter is also used for receiving the third control signal and controlling the energy storage converter to track the amplitude, frequency, and phase of the voltage on the input end AC bus of the main converter according to the third control signal; The energy storage converter is also configured to control the energy storage converter to absorb the power output by the generator set to charge the energy storage battery according to the third control signal when the power output by the generator set reaches the predetermined power.

6. A black start system for a wind power plant grid according to claim 1 or 4, characterized in that, The energy storage converter is also configured to send a standby signal to the main control module when the energy storage battery is fully charged. The main control module is also configured to receive the standby signal and send a fourth control signal to the energy storage converter. The energy storage converter is also configured to receive the fourth control signal and control the energy storage converter to enter a standby state according to the fourth control signal.

7. A black start method of a wind power plant grid based on the black start system of any one of claims 1-6, characterized in that, The method comprises: in response to a start command, starting the energy storage converter to power on the main converter, an AC bus at an input end of the main converter and an AC bus at an output end of the main converter; when the voltage of the AC bus at the input end of the main converter and the voltage of the AC bus at the output end of the main converter reach a stable state and the DC bus voltage of the main converter reaches a rated value, the main converter sends a start signal to a main control module; the main control module receives the start signal sent by the main converter, generates and sends a second control signal; the generator set receives the second control signal and generates power at a predetermined power; when the power output by the generator set rises to the predetermined power, the energy storage converter is controlled to absorb the power output by the generator set to charge the energy storage battery; when the energy storage battery is fully charged, the energy storage converter enters a standby state, thereby completing the black start of the system.

8. A computer storage medium, characterized in that The computer storage medium stores one or more programs, and when the one or more programs are executed, the black start method of a wind turbine generator system network according to claim 7 can be implemented.

9. A computer device, comprising: The computer storage medium stores one or more programs, and when the one or more programs are executed, the black start method of a wind turbine generator system network according to claim 7 can be implemented. The computer storage medium stores one or more programs, and when the one or more programs are executed, the black start method of a wind turbine generator system network according to claim 7 can be implemented.

Images