CN116300526A - Simulation system and simulation method for wind turbines - Google Patents

Abstract

The embodiment of the specification discloses a simulation system and a simulation method of a wind turbine generator. The simulation system comprises RT-LAB simulation equipment and Bladed simulation equipment; the RT-LAB simulation device is connected with a current transformer controller and a main controller of the wind turbine, and is used for transmitting first simulation data between the RT-LAB simulation device and the current transformer controller, and transmitting second simulation data to the Bladed simulation device through the current transformer controller and the main controller; the Bladed simulation device is provided with a pneumatic part model of the wind turbine generator, is connected with a main controller of the wind turbine generator, and is used for transmitting third simulation data with the main controller and transmitting fourth simulation data to the RT-LAB simulation device through the main controller; the RT-LAB simulation equipment is also used for acquiring voltage response and current response of the wind turbine before and after fault ride-through, and the voltage response and the current response are used for analyzing the fault ride-through characteristics of the wind turbine.

Description

Simulation system and simulation method for wind turbines

technical field

The embodiments of this specification relate to the technical field of wind power, and in particular to a simulation system and simulation method of a wind turbine.

Background technique

In order to simplify the grid connection detection of the same series of wind turbines of the manufacturer, if a certain type of wind turbine passes the fault ride-through characteristic detection, when the key components (generator, pitch system, blade, etc.) of the same series are replaced, the simulation-based The test consistency evaluation method analyzes and evaluates the fault ride-through capability of wind turbines. However, the consistency assessment based on the simulation test requires that the simulation platform can accurately reflect the dynamic characteristics of the main equipment and controls of the wind turbine. The current simulation platform simplifies the wind turbine to a certain extent, which cannot accurately reflect the response characteristics of the wind turbine under all working conditions. For example, the current method of simulating the fault ride-through characteristics of wind turbines mainly adopts the hardware-in-the-loop simulation system based on "converter controller + simulator". The control simulation is realized through the communication between the converter control program and the electrical circuit model of the wind turbine in the simulator. It can only reflect the control characteristics of the converter control logic in an ideal scenario, and cannot effectively simulate the cooperation between the main controller and the converter controller under fault conditions, and it is difficult to realize the full-cycle control of the wind turbine in a complex wind environment Simulation of characteristics.

Contents of the invention

The embodiment of this specification provides a simulation system and simulation method of a wind turbine to reflect the full-link control characteristics of the wind turbine in the fault ride-through characteristic detection process, which is close to engineering practice. The technical solutions of the embodiments of this specification are as follows.

The first aspect of the embodiments of this specification provides a simulation system for wind turbines, including RT-LAB simulation equipment and Bladed simulation equipment;

The RT-LAB simulation equipment is equipped with an electrical part model of the wind turbine, and the RT-LAB simulation equipment is connected with the converter controller and the main controller of the wind turbine, and is used to communicate with the converter according to the electrical part model. transmitting the first simulation data between the controllers, and sending the second simulation data to the Bladed simulation device via the converter controller and the main controller;

The Bladed simulation device is equipped with an aerodynamic part model of the wind turbine, and the Bladed simulation device is connected with the main controller of the wind turbine for transmitting the third simulation data between the aerodynamic part model and the main controller, and via The main controller sends the fourth simulation data to the RT-LAB simulation equipment;

The RT-LAB simulation device is also used to obtain the voltage response and current response of the wind turbine before and after the fault ride-through, and the voltage response and the current response are used to analyze the fault ride-through characteristics of the wind turbine.

The first aspect of the embodiments of this specification provides a simulation method, including:

The steady-state operation wind condition is set by the Bladed simulation equipment, and the Bladed simulation equipment is connected with the main controller;

The fault voltage working condition is set by the RT-LAB simulation equipment, and the RT-LAB simulation equipment is connected with the converter controller and the main controller;

The fault voltage is added after the start-up command of the main controller is issued;

Obtain the voltage response and current response of the wind turbine before and after fault ride-through through RT-LAB simulation equipment;

In the case that the converter controller has no fault disconnection, the preset index is calculated according to the voltage response and the current response, and the preset index is used to represent the fault ride-through characteristic of the wind turbine.

The technical solutions provided by the embodiments of this specification can perform cross-platform combined hardware-in-the-loop testing on the main controller and the converter controller of the wind turbine. And in the simulation test process, the coordination function of the main controller and the converter controller is considered, which reflects the whole-link control characteristics of the wind turbine before and after the fault ride-through process, which is close to the engineering reality.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. The drawings in the following description are only for this specification For some embodiments described in , for those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative efforts.

FIG. 1 is a schematic diagram of the functional structure of a simulation system in an embodiment of this specification;

FIG. 2 is a schematic diagram of the functional structure of another simulation system in the embodiment of this specification;

Fig. 3 is a schematic flow chart of a simulation method in the embodiment of this specification;

Fig. 4 is a schematic flow chart of another simulation method in the embodiment of this specification;

Figure 5a is a schematic diagram of the machine terminal voltage curve in the embodiment of this specification;

Fig. 5b is a schematic diagram of the active power curve in the embodiment of this specification;

Fig. 5c is a schematic diagram of the reactive power curve in the embodiment of this specification;

Fig. 5d is a schematic diagram of the rotation speed curve of the generator in the embodiment of the present specification.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present specification in combination with the drawings in the embodiments of the present specification. Obviously, the described embodiments are only some of the embodiments of the present specification, not all of them. The specific embodiments described here are only used to explain the present disclosure, but not to limit the present disclosure. All other embodiments obtained by persons of ordinary skill in the art based on the described embodiments of the present disclosure belong to the protection scope of the present disclosure. In addition, relational terms such as "first" and "second", etc. are only used to distinguish one entity or operation from another entity or operation and do not necessarily require or imply any relationship between these entities or operations. This actual relationship or sequence.

The embodiment of this specification provides a simulation system of a wind turbine. The simulation system is used to realize the combined hardware-in-the-loop test of the wind turbine main controller and the converter controller. The simulation system considers the coordination function of the main controller of the wind turbine and the converter controller in the fault ride-through process, and reflects the whole-link control characteristics of the wind turbine in the fault ride-through characteristic detection process, which is more accurate than previous simulation modeling methods. close to engineering practice. Wherein, the wind turbine may include a doubly-fed wind turbine. Both the stator and the rotor of the doubly-fed wind turbine can feed power to the grid. The control program of the wind turbine converter runs in the converter controller. The main function of the wind turbine converter is to control the amplitude, phase, and frequency of the excitation through the converter when the rotor speed changes, so as to keep the output voltage, frequency, and amplitude of the generator consistent with the power grid, so as to realize the wind turbine Variable speed constant frequency power generation. The main controller is used to control the converter controller, and of course it can also perform other aspects of control, such as pitch control and the like. The fault ride-through characteristics may include fault voltage ride-through characteristics. The fault voltage ride-through characteristics may include high-voltage ride-through characteristics, low-voltage ride-through characteristics, and the like.

The simulation system may include RT-LAB simulation equipment and Bladed simulation equipment. Therefore, the simulation system can realize cross-platform joint hardware-in-the-loop testing, for example, cross-platform joint hardware-in-the-loop testing across RT-LAB platform and Bladed platform. The RT-LAB simulation device is configured with an electrical part model of the wind turbine. The electric part model may include a simulation model of a power grid, a simulation model of a motor and a converter, and the like. The aerodynamic part model of the wind turbine is configured in the Bladed simulation device. The aerodynamic part model may include a wind environment simulation model, a wind turbine aerodynamic and shafting simulation model, and the like. Through the electrical part model and the pneumatic part model, the test conditions can be set flexibly, the operation is simple and flexible, and the test efficiency is high.

In practical applications, the converter controller of the wind turbine can be connected to the RT-LAB simulation equipment, the main controller of the wind turbine can be connected to the Bladed simulation equipment, and the main controller of the wind turbine can be connected to the RT-LAB simulation The equipment is connected by communication methods such as DB37, and the converter controller of the wind turbine can be connected with the main controller by CAN and other communication methods, so as to obtain a simulation system for the fault ride-through test of the wind turbine. By setting specific power grid operating conditions and fault conditions in RT-LAB simulation equipment, and setting specific wind turbine operating conditions in Bladed simulation equipment, the voltage and current response of wind turbines before and after fault ride-through can be tested. Furthermore, the characteristics of fault ride-through capability of wind turbines are obtained through analysis. In this way, the joint hardware-in-the-loop test of the wind turbine main controller and the converter controller is realized. In some scenario examples, the converter controller of the wind turbine can be connected to the RT-LAB simulation device through the IO board, the main controller of the wind turbine can be connected to the Bladed simulation device through the communication model, and the wind turbine’s The converter controller and the main controller are connected by communication methods such as CAN, so as to obtain a simulation system for fault ride-through testing.

The simulation system may include a first host computer, a second host computer and a third host computer. The first upper computer may include an upper computer of the converter controller, which is used for setting the converter controller. The second host computer may include a host computer of the RT-LAB simulation device, which is used for setting the RT-LAB simulation device. For example, the second host computer can compile the electrical part model of the wind turbine and download it to the RT-LAB simulation device. The third host computer can be used as a Bladed simulation device. The GH Bladed software can be run in the third host computer, and the real-time simulation can be realized through the supporting program Hardwaretest. Of course, the third upper computer can also be used as the upper computer of the main controller, for setting the main controller.

The RT-LAB simulation device can be connected with the main controller and the converter controller through the DB37 communication mode. The Bladed simulation device can be connected with the main controller through the TCP/IP communication mode. During the fault ride-through characteristic detection process, the RT-LAB simulation device can transmit the first simulation data to the converter controller according to the electrical part model, and send the first simulation data to the converter controller and the main controller according to the electrical part model The Bladed simulation device sends the second simulation data. The Bladed simulation device can transmit third simulation data to the main controller according to the aerodynamic part model, and send fourth simulation data to the RT-LAB simulation device via the main controller according to the aerodynamic part model. The RT-LAB simulation device is also used to obtain the voltage response and current response of the wind turbine before and after fault ride-through. The voltage response and the current response are used to analyze the fault ride-through characteristics of the wind turbine. Wherein, during the fault ride-through characteristic detection process, the communication link of the second simulation data may include: RT-LAB simulation device→converter controller→main controller→Bladed simulation device. The communication link of the fourth simulation data may include: Bladed simulation device→main controller→RT-LAB simulation device.

During the fault ride-through characteristic detection process, the output and input of RT-LAB simulation equipment can include analog and digital quantities. Specifically, the analog quantities generated and output by the RT-LAB simulation equipment include: grid voltage, grid current, stator voltage, stator current, grid-side voltage, grid-side module current, machine-side voltage, machine-side module current, generator electromagnetic rotation torque, DC bus voltage, etc. The analog input of RT-LAB simulation equipment includes generator speed and so on. The digital quantities generated and output by RT-LAB simulation equipment include: grid-side contactor closing signal feedback, excitation contactor closing signal feedback, protection circuit closing signal feedback, etc. The digital input of RT-LAB simulation equipment includes: grid-side converter IGBT pulse signal, machine-side converter IGBT pulse signal, grid-side contactor closing signal, excitation contactor closing signal, protection circuit closing signal, etc. . The outputs and inputs of Bladed emulated devices can include analog quantities. Specifically, the analog quantities generated and output by Bladed simulation equipment include: generator speed, low-speed shaft speed, pitch angle, yaw angle, wind speed, etc. The analog input of Bladed simulation equipment includes: pitch angle command, yaw angle command, generator electromagnetic torque, etc.

The first simulation data may include analog quantities and digital quantities. For example, the first simulation data may include the following analog quantities: grid voltage, grid current, stator voltage, stator current, grid-side voltage, grid-side module current, generator-side voltage, generator-side module current, DC bus voltage, and the like. The first simulation data may include the following digital quantities: grid-side contactor closing signal feedback, excitation contactor closing signal feedback, protection circuit closing signal feedback, and the like. In some scenario examples, what the RT-LAB simulation device sends to the converter controller may be the analog quantity in the first matrix data, and the converter controller sends the RT-LAB simulation device What is sent may be the digital quantity in the first square matrix data. The second simulation data may include analog quantities. For example, the second simulation data may include generator electromagnetic torque and the like. The third simulation data may include analog quantities. For example, the third simulation data may include low-speed shaft rotation speed, pitch angle, yaw angle, wind speed and so on. The fourth simulation data may include analog quantities. For example, the fourth simulation data may include generator speed and the like.

See Figure 1. The electrical part model in the RT-LAB simulation device can be used to simulate an equivalent power grid, a generator, a converter, and the like. In practical application, the electrical part model can be compiled and downloaded to the RT-LAB simulation device. The aerodynamic part model in the Bladed simulation device can be used to simulate wind environment, wind wheel and shaft system, etc. The aerodynamic part model runs based on GH Bladed software, and realizes real-time simulation through the supporting program Hardware test. The converter controllers and main controllers in Figure 1 can be real objects, specifically products that have been produced by different manufacturers in the market, and are consistent with the models of the wind turbines in operation on site. Of course, products under development can also be used for simulation testing. Arrows indicate the direction of data transfer.

Two-way real-time communication between the RT-LAB simulation device and the converter controller, one-way real-time communication between the RT-LAB simulation device and the main controller, and one-way real-time communication between the Bladed simulation device and the main controller Two-way real-time communication, two-way real-time communication can be carried out between RT-LAB simulation equipment and Bladed simulation equipment. For example, the RT-LAB simulation device can send the second simulation data to the Bladed simulation device via the converter controller and the main controller, and the Bladed simulation device can send the fourth simulation data to the RT-LAB simulation device via the main controller. Therefore, the following technical effects are obtained.

(1) If the Bladed simulation device is directly connected to the RT-LAB simulation device for communication. Then the RT-LAB simulation device needs at least 4 IO communication boards A, B, C, and D. IO communication board A is used for RT-LAB simulation equipment to send the analog quantity (analog quantity in the first simulation data) to the converter controller, and IO communication board B is used for RT-LAB simulation equipment to receive the converter controller The digital quantity sent (the digital quantity in the first simulation data), the IO communication board C is used for the RT-LAB simulation device to send the analog quantity (the second simulation data) to the Bladed simulation device, and the IO communication board D is used for the RT - the LAB simulation device receives the analog quantity (fourth simulation data) sent by the Bladed simulation device. The price of the IO communication board is relatively high, which requires a large simulation cost.

The Bladed simulation device in the embodiment of this specification is not directly connected to the RT-LAB simulation device, and two-way real-time communication is performed between the two via the converter controller and/or the main controller. In this way, the RT-LAB simulation device may need three IO communication boards such as E, F, and G. IO communication board E is used for RT-LAB simulation equipment to send analog quantities (analog quantity in the first simulation data and second simulation data) to the converter controller, and IO communication board F is used for RT-LAB simulation equipment Receive the digital quantity sent by the converter controller (the digital quantity in the first simulation data), and the IO communication block G is used for the RT-LAB simulation device to receive the analog quantity (the fourth simulation data) sent by the main controller. The number of IO communication blocks is small, which saves simulation costs.

(2) According to Figure 1, the main controller is the Master end of the cross-platform simulation communication, and the Bladed simulation device and RT-LAB simulation device are the Slaver end. Compared with the simulation software, the main controller has a stronger clock calibration capability, which can ensure the real-time performance of the cross-platform simulation and improve the accuracy of the simulation.

See Figure 2. The simulation system may include a first host computer, a second host computer, a third host computer, a converter controller, an RT-LAB simulator, a main controller, and the like. The first upper computer may include an upper computer of the converter controller, which is used for setting the converter controller. The second host computer may include the host computer of the RT-LAB emulation machine, which is used for setting the RT-LAB emulation device. For example, the second host computer can compile the electrical part model of the wind turbine and download it to the RT-LAB simulation device. The third host computer can be used as a Bladed simulation device. The GH Bladed software can be run in the third host computer, and the real-time simulation can be realized through the supporting program Hardware test. Of course, the third upper computer can also be used as the upper computer of the main controller, for setting the main controller.

Based on the simulation system of the wind turbine in the embodiment of the specification, the embodiment of the specification also provides a simulation method accordingly. Please refer to Figure 3 and Figure 4. The simulation method may include the following steps.

Step S31: Set the steady-state operating wind conditions through the Bladed simulation device, which is connected to the main controller.

Step S33: Set the fault voltage working condition through the RT-LAB simulation equipment, and the RT-LAB simulation equipment is connected with the converter controller and the main controller.

Step S35: The fault voltage is added after the main controller sends the start-up command.

Step S37: Obtain the voltage response and current response of the wind turbine before and after the fault ride-through through the RT-LAB simulation device.

Step S39: In the case that the converter controller is not tripped due to a fault, calculate a preset index according to the voltage response and the current response, and the preset index is used to represent the fault ride-through characteristic of the wind turbine.

In some embodiments, the converter controller of the wind turbine can be connected with the RT-LAB simulation device, the main controller of the wind turbine can be connected with the Bladed simulation device, and the converter controller of the wind turbine can be connected with the main The controller is connected by communication means such as CAN. For example, the converter controller of the wind turbine can be connected to the RT-LAB simulation device through the IO board, the main controller of the wind turbine can be connected to the Bladed simulation device through the communication model, and the converter control of the wind turbine can be connected to The device and the main controller are connected by CAN communication.

In some embodiments, the operating wind conditions may include wind speed. Specifically, the wind speed can be set according to the wind power curve. For example, the wind speed corresponding to the strong wind condition and the wind speed corresponding to the small wind condition may be selected according to the wind power curve. The strong wind condition may be P>0.9Pn, the light wind condition may be 0.1Pn<P<0.3Pn, P represents the active power output of the wind turbine, and Pn represents the rated power of the wind turbine. Of course, according to needs, you can also choose to add turbulent wind.

In some embodiments, the fault voltage conditions may include magnitude and time of the fault voltage. Voltage faults can be implemented based on impedance division. The amplitude and time can be set according to the needs of wind turbines connected to the power system.

In some embodiments, the fault voltage is added after the main controller sends the start-up command and waits for the simulation system to run stably. Detect the voltage and current response of wind turbines through RT-LAB simulation equipment. It can detect whether the converter controller reports a fault and is off-grid. If there is no fault off-grid, the preset index can be calculated according to the voltage response and current response. The preset index is used to represent the fault ride-through characteristic of the wind turbine. The preset index may include active power, reactive power, reactive current response, etc. of the wind turbine before and after fault ride-through. If the fault trawls, the control strategy of the converter controller can be corrected. After correction, step S35-step S39 may be repeated.

In some embodiments, step S31-step S39 may be iteratively executed until the iteration end condition is satisfied. Thereby, multiple sets of preset indexes corresponding to various fault voltage working conditions are obtained. The fault ride-through characteristic curve of the wind turbine can be drawn according to multiple sets of preset indicators. For example, the fault voltage working condition in step S33 can be modified, and steps S35-S39 can be repeated. In this way, multiple sets of preset indicators corresponding to various fault voltage conditions are obtained, and then the fault ride-through characteristic curve of the wind turbine is drawn. For example, Fig. 5a-Fig. 5d are low voltage ride through characteristic curves of wind turbines. Among them, Fig. 5a is the machine terminal voltage curve, the abscissa represents the time, and the ordinate represents the machine terminal voltage. Figure 5b is an active power curve, the abscissa represents time, and the ordinate represents active power. Fig. 5c is a reactive power curve, the abscissa represents time, and the ordinate represents reactive power. Figure 5d is the generator speed curve, the abscissa represents time, and the ordinate represents the generator speed. In Figs. 5a-5d, the main control zone model represents the simulation system of the embodiment of this specification, that is, the simulation system includes the RT-LAB simulation device, the converter controller, the main controller and the Bladed simulation device. No model of main control means that the simulation system includes RT-LAB simulation equipment, converter controller and main controller, but there is no Bladed simulation equipment. Single variable flow means that the simulation system includes RT-LAB simulation equipment and variable flow controller, but without main controller and Bladed simulation equipment.

The simulation method of the embodiment of this specification, in the simulation test process, considers the coordination function of the main controller and the converter controller, reflects the whole-link control characteristics of the wind turbine before and after the fault ride-through process, and is close to the engineering reality.

In the 1990s, the improvement of a technology can be clearly distinguished as an improvement in hardware (for example, improvements in circuit structures such as diodes, transistors, and switches) or improvements in software (improvement in method flow). However, with the development of technology, the improvement of many current method flows can be regarded as the direct improvement of the hardware circuit structure. Designers almost always get the corresponding hardware circuit structure by programming the improved method flow into the hardware circuit. Therefore, it cannot be said that the improvement of a method flow cannot be realized by hardware physical modules. For example, a Programmable Logic Device (Programmable Logic Device, PLD) (such as a Field Programmable Gate Array (Field Programmable Gate Array, FPGA)) is such an integrated circuit, and its logic function is determined by programming the device by a user. It is programmed by the designer to "integrate" a digital system on a PLD, instead of asking a chip manufacturer to design and make a dedicated integrated circuit chip. Moreover, nowadays, instead of making integrated circuit chips by hand, this kind of programming is mostly realized by "logic compiler (logic compiler)" software, which is similar to the software compiler used when writing programs. The original code of the computer must also be written in a specific programming language, which is called a hardware description language (Hardware Description Language, HDL), and there is not only one kind of HDL, but many kinds, such as ABEL (Advanced Boolean Expression Language) , AHDL (Altera Hardware Description Language), Confluence, CUPL (Cornell University Programming Language), HDCal, JHDL (Java Hardware Description Language), Lava, Lola, MyHDL, PALASM, RHDL (Ruby Hardware Description Language), etc., currently the most commonly used is VHDL (Very-High-Speed Integrated Circuit Hardware Description Language) and Verilog. It should also be clear to those skilled in the art that the hardware circuit for realizing the logical method flow can be easily obtained only by logically programming the method flow in the above-mentioned several hardware description languages and programming it into an integrated circuit.

The systems, devices, modules, or units described in the above embodiments can be specifically implemented by computer chips or entities, or by products with certain functions. A typical implementing device is a computer. The computer can be a personal computer, laptop computer, cellular phone, camera phone, smart phone, personal digital assistant, media player, navigation device, email device, game console, tablet computer, wearable device, or any of these Any combination of devices.

The specification may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The present description may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including storage devices.

Those skilled in the art can understand that the description of each embodiment has its own emphases, and for parts not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments. In addition, it can be understood that after reading this specification, those skilled in the art can think of any combination of some or all of the embodiments listed in this specification without creative effort, and these combinations are also within the scope of disclosure and protection of this specification.

Although the description has been described by way of example, those of ordinary skill in the art will recognize that there are many variations and changes in the description, and it is intended that the appended claims cover such modifications and changes without departing from the spirit of the description.

Claims (10)

1. The simulation system of the wind turbine generator is characterized by comprising RT-LAB simulation equipment and Bladed simulation equipment;

the RT-LAB simulation device is connected with a converter controller and a main controller of the wind turbine, and is used for transmitting first simulation data according to the electric part model and the converter controller, and transmitting second simulation data to the Bladed simulation device through the converter controller and the main controller;

the Bladed simulation device is connected with a main controller of the wind turbine, and is used for transmitting third simulation data according to the pneumatic part model and the main controller, and transmitting fourth simulation data to the RT-LAB simulation device through the main controller;

the RT-LAB simulation equipment is also used for acquiring voltage response and current response of the wind turbine before and after fault ride-through, and the voltage response and the current response are used for analyzing the fault ride-through characteristics of the wind turbine.

2. The simulation system of claim 1, wherein the wind turbine comprises a doubly-fed wind turbine.

3. The simulation system of claim 1, wherein the RT-LAB simulation device is connected to the main controller and the converter controller through DB37 communication, and the Bladed simulation device is connected to the main controller through TCP/IP communication.

4. The simulation system of claim 1, wherein the simulation system comprises a first host computer and a second host computer, the first host computer comprises a host computer of a current transformer controller, the second host computer comprises a host computer of an RT-LAB simulation device, the loaded simulation device comprises a third host computer, and the third host computer is a host computer of a master controller.

5. The simulation system of claim 1 wherein the first simulation data comprises an analog quantity and a digital quantity, the second simulation data comprises a generator electromagnetic torque, the third simulation data comprises an analog quantity, and the fourth simulation data comprises a generator rotational speed.

6. A simulation method based on the simulation system of any one of claims 1 to 5, comprising:

setting a steady-state operation wind condition through a Bladed simulation device, wherein the Bladed simulation device is connected with a main controller;

setting a fault voltage working condition through RT-LAB simulation equipment, wherein the RT-LAB simulation equipment is connected with a converter controller and a main controller;

after the host controller starts the machine instruction to issue, adding fault voltage;

acquiring voltage response and current response of the wind turbine generator before and after fault ride through by using RT-LAB simulation equipment;

under the condition that the converter controller does not have fault off-grid, calculating a preset index according to the voltage response and the current response, wherein the preset index is used for representing the fault ride-through characteristic of the wind turbine generator.

7. The simulation method of claim 6, wherein the operating wind conditions include wind speed and the fault voltage conditions include a magnitude and a time of a fault voltage.

8. The simulation method according to claim 6, wherein the preset index includes at least one of: active power, reactive current response.

9. The simulation method according to claim 6, wherein the method further comprises:

and under the condition that the converter controller fails to be disconnected, correcting the control strategy of the converter controller.

10. The simulation method according to claim 6, wherein the method further comprises:

iteratively executing the steps of setting the steady-state operation wind working condition, setting the fault voltage working condition, adding the fault voltage, obtaining the voltage response and the current response, and calculating the preset index until the iteration ending condition is met;

and drawing a fault ride-through characteristic curve of the wind turbine generator according to the plurality of groups of preset indexes.

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