Simulation system and simulation method for wind turbine generator

Abstract

The embodiment of the present specification discloses a simulation system and a simulation method of a wind turbine. The simulation system comprises an RT-LAB simulation device and a Bladed simulation device; the electrical part model of the wind turbine is configured in the RT-LAB simulation device, the RT-LAB simulation device is connected with the converter controller and the main controller of the wind turbine, is used for transmitting the first simulation data between the converter controller, and sending the second simulation data to the Bladed simulation device via the converter controller and the main controller; the aerodynamic part model of the wind turbine is configured in the Bladed simulation device, the Bladed simulation device is connected with the main controller of the wind turbine, is used for transmitting the third simulation data between the main controller, and sending the fourth simulation data to the RT-LAB simulation device via the main controller; the RT-LAB simulation device is further used for acquiring the voltage response and the 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

Technical Field

[0001] The embodiments in this specification relate to the field of wind power technology, and in particular to a simulation system and simulation method for wind turbine generators. Background Technology

[0002] To simplify grid connection testing of wind turbines within the same series, if a particular model of wind turbine passes fault ride-through characteristic testing, the fault ride-through capability of the wind turbine can be analyzed and evaluated using a consistency assessment method based on simulation testing when key components (generator, pitch system, blades, etc.) of its series of turbines are replaced. However, consistency assessment based on simulation testing requires the simulation platform to accurately reflect the dynamic characteristics of the main equipment and controls of the wind turbine. Current simulation platforms simplify the wind turbine to a certain extent and cannot accurately reflect the response characteristics of the wind turbine under all operating conditions. For example, current methods for simulating the fault ride-through characteristics of wind turbines mainly use hardware-in-the-loop simulation systems based on "converter controller + simulator". Control simulation is achieved through communication between the converter control program and the electrical circuit model of the wind turbine in the simulator. This can only reflect the control characteristics of the converter control logic under ideal scenarios and cannot effectively simulate the cooperation between the main controller and the converter controller under fault conditions, making it difficult to simulate the full-process control characteristics of the wind turbine in complex wind environments. Summary of the Invention

[0003] This specification provides a simulation system and method for wind turbine generators to reflect the full-process control characteristics of wind turbine generators during fault ride-through characteristic detection, closely aligning with actual engineering practices. The technical solutions of this specification's embodiments are as follows.

[0004] A first aspect of the embodiments of this specification provides a simulation system for wind turbine generators, including an RT-LAB simulation device and a Bladed simulation device;

[0005] The RT-LAB simulation device is equipped with an electrical component model of a wind turbine. The RT-LAB simulation device is connected to the converter controller and main controller of the wind turbine and is used to transmit first simulation data between the electrical component model and the converter controller, and to send second simulation data to the Bladed simulation device via the converter controller and the main controller.

[0006] The Bladed simulation device is equipped with an aerodynamic model of a wind turbine. The Bladed simulation device is connected to the main controller of the wind turbine and is used to transmit third simulation data between the aerodynamic model and the main controller, and to send fourth simulation data to the RT-LAB simulation device via the main controller.

[0007] The RT-LAB simulation equipment is also used to acquire the voltage and current responses of the wind turbine before and after fault ride-through, and the voltage and current responses are used to analyze the fault ride-through characteristics of the wind turbine.

[0008] A first aspect of the embodiments of this specification provides a simulation method, including:

[0009] The steady-state operating conditions are set using a Bladed simulation device, which is connected to the main controller.

[0010] The fault voltage condition is set using an RT-LAB simulation device, which is connected to the converter controller and the main controller.

[0011] After the main controller issues the start command, the fault voltage is applied.

[0012] The voltage and current responses of the wind turbine before and after fault ride were obtained using RT-LAB simulation equipment.

[0013] In the absence of grid disconnection due to a fault in the converter controller, a preset index is calculated based on the voltage and current responses. This preset index is used to represent the fault ride-through characteristics of the wind turbine.

[0014] The technical solutions provided in the embodiments of this specification can perform cross-platform joint hardware-in-the-loop testing of the main controller and converter controller of a wind turbine. Furthermore, the simulation test considers the coordinated role of the main controller and converter controller, reflecting the full-process control characteristics of the wind turbine before and after the fault ride-through process, closely aligning with actual engineering practices. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. The drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a functional structure diagram of a simulation system in one of the embodiments of this specification;

[0017] Figure 2 This is a functional structure diagram of another simulation system in the embodiments of this specification;

[0018] Figure 3 This is a flowchart illustrating a simulation method as described in the embodiments of this specification;

[0019] Figure 4This is a flowchart illustrating another simulation method in the embodiments of this specification;

[0020] Figure 5a This is a schematic diagram of the terminal voltage curve in the embodiments of this specification;

[0021] Figure 5b This is a schematic diagram of the active power curve in the embodiments of this specification;

[0022] Figure 5c This is a schematic diagram of the reactive power curves in the embodiments of this specification;

[0023] Figure 5d This is a schematic diagram of the generator speed curve in the embodiments of this specification. Detailed Implementation

[0024] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. The specific embodiments described herein are only used to explain this disclosure, and not to limit this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure are within the scope of protection of this disclosure. In addition, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0025] This specification provides a simulation system for a wind turbine generator. The simulation system is used to perform joint hardware-in-the-loop testing of the wind turbine generator's main controller and converter controller. The simulation system considers the coordinated role of the main controller and converter controller during fault ride-through, reflecting the full-process control characteristics of the wind turbine generator during fault ride-through characteristic detection, and is closer to engineering reality than previous simulation modeling methods. The wind turbine generator may include a doubly-fed induction generator (DFIG). Both the stator and rotor of the DFIG can feed power to the grid. The converter controller runs the control program for the wind turbine generator's converter. The main function of the wind turbine generator's converter includes controlling the amplitude, phase, and frequency of the excitation through the converter when the rotor speed changes, so that the generator's output voltage, frequency, and amplitude are consistent with the grid, thereby achieving variable-speed constant-frequency power generation of the wind turbine generator. The main controller is used to control the converter controller, and can also perform other controls, such as pitch control. The fault ride-through characteristics may include fault voltage ride-through characteristics, including high-voltage ride-through characteristics and low-voltage ride-through characteristics.

[0026] The simulation system may include RT-LAB simulation equipment and Bladed simulation equipment. This enables cross-platform joint hardware-in-the-loop testing, such as joint hardware-in-the-loop testing across RT-LAB and Bladed platforms. The RT-LAB simulation equipment includes an electrical component model of the wind turbine. This electrical component model may include simulation models of the power grid, motors, and converters. The Bladed simulation equipment includes an aerodynamic component model of the wind turbine. This aerodynamic component model may include simulation models of the wind environment, wind turbine aerodynamics, and shaft system. Through these electrical and aerodynamic component models, test conditions can be flexibly set, operation is simple and flexible, and testing efficiency is high.

[0027] In practical applications, the converter controller of a wind turbine can be connected to an RT-LAB simulation device, the main controller of the wind turbine can be connected to a Bladed simulation device, the main controller of the wind turbine can be connected to the RT-LAB simulation device using communication methods such as DB37, and the converter controller and main controller of the wind turbine can be connected using communication methods such as CAN, thus obtaining a simulation system for wind turbine fault ride-through testing. By setting specific grid operating conditions and fault conditions in the RT-LAB simulation device, and specific wind turbine operating conditions in the Bladed simulation device, the voltage and current responses of the wind turbine before and after fault ride-through can be tested, thereby analyzing the fault ride-through capability characteristics of the wind turbine. This enables joint hardware-in-the-loop testing of the wind turbine's main controller and converter controller. In some scenario examples, the converter controller of the wind turbine can be connected to the RT-LAB simulation device via an I / O board, the main controller of the wind turbine can be connected to the Bladed simulation device via a communication model, and the converter controller and main controller of the wind turbine can be connected using communication methods such as CAN, thus obtaining a simulation system for fault ride-through testing.

[0028] The simulation system may include a first host computer, a second host computer, and a third host computer. The first host computer may include a host computer for the converter controller, used for configuring the converter controller. The second host computer may include a host computer for the RT-LAB simulation device, used for configuring the RT-LAB simulation device. For example, the second host computer can compile and download the electrical component model of the wind turbine to the RT-LAB simulation device. The third host computer can be used as a Bladed simulation device. The third host computer can run GH Bladed software, achieving real-time simulation through the accompanying program Hardwaretest. Alternatively, the third host computer can also be used as a host computer for the main controller, used for configuring the main controller.

[0029] The RT-LAB simulation device can be connected to the main controller and converter controller via DB37 communication. The Bladed simulation device can be connected to the main controller via TCP / IP communication. During fault ride-through characteristic detection, the RT-LAB simulation device can transmit first simulation data between the electrical component model and the converter controller, and send second simulation data to the Bladed simulation device via the converter controller and the main controller based on the electrical component model. The Bladed simulation device can transmit third simulation data between the aerodynamic component model and the main controller, and send fourth simulation data to the RT-LAB simulation device via the main controller based on the aerodynamic component model. The RT-LAB simulation device is also used to acquire the voltage and current responses of the wind turbine before and after fault ride-through. The voltage and current responses are used to analyze the fault ride-through characteristics of the wind turbine. Specifically, during fault ride-through characteristic detection, the communication link for the second simulation data can include: RT-LAB simulation device → converter controller → main controller → Bladed simulation device. The communication link for the fourth simulation data can include: Bladed simulation device → main controller → RT-LAB simulation device.

[0030] During fault ride-through characteristic detection, the RT-LAB simulation equipment can output and input both 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, generator-side voltage, generator-side module current, generator electromagnetic torque, and DC bus voltage. The analog quantities input to the RT-LAB simulation equipment include generator speed. The digital quantities generated and output by the RT-LAB simulation equipment include: grid-side contactor closing signal feedback, excitation contactor closing signal feedback, and protection circuit closing signal feedback. The digital quantities input to the RT-LAB simulation equipment include: grid-side converter IGBT pulse signals, generator-side converter IGBT pulse signals, grid-side contactor closing signals, excitation contactor closing signals, and protection circuit closing signals. The Bladed simulation equipment can also output and input analog quantities. Specifically, the analog quantities generated and output by the Bladed simulation equipment include: generator speed, low-speed shaft speed, pitch angle, yaw angle, and wind speed. The analog inputs to the Bladed simulation device include: pitch angle command, yaw angle command, generator electromagnetic torque, etc.

[0031] The first simulation data may include analog 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, etc. 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, etc. In some scenario examples, the RT-LAB simulation device may send analog quantities from the first matrix data to the converter controller, and the converter controller may send digital quantities from the first matrix data to the RT-LAB simulation device. The second simulation data may include analog quantities. For example, the second simulation data may include generator electromagnetic torque, etc. The third simulation data may include analog quantities. For example, the third simulation data may include low-speed shaft speed, pitch angle, yaw angle, wind speed, etc. The fourth simulation data may include analog quantities. For example, the fourth simulation data may include generator speed, etc.

[0032] Please see Figure 1 The electrical component model in the RT-LAB simulation device can be used to simulate equivalent power grids, generators, and converters. In practical applications, the electrical component model can be compiled and downloaded to the RT-LAB simulation device. The aerodynamic component model in the Bladed simulation device can be used to simulate wind environments, wind turbines, and shaft systems. The aerodynamic component model runs on GH Bladed software and achieves real-time simulation through the accompanying Hardware test program. Figure 1 The converter controller and main controller in the diagram can be physical devices, specifically products already commercially available from different manufacturers, consistent with the model of the wind turbine unit operating in the field. Alternatively, products under development can be used for simulation testing. Arrows indicate the direction of data transmission.

[0033] The RT-LAB simulation device can communicate bidirectionally in real-time with the converter controller, and unidirectionally with the main controller. The Blended simulation device can also communicate bidirectionally with the main controller, and with other RT-LAB simulation devices. For example, the RT-LAB simulation device can send second simulation data to the Blended simulation device via the converter controller and the main controller, and the Blended simulation device can send fourth simulation data to the RT-LAB simulation device via the main controller. This achieves the following technical effects.

[0034] (1) If the Bladed simulation device is directly connected to the RT-LAB simulation device for communication, the RT-LAB simulation device requires at least four I / O communication boards: A, B, C, and D. I / O communication board A is used by the RT-LAB simulation device to send analog signals (analog signals in the first simulation data) to the converter controller; I / O communication board B is used by the RT-LAB simulation device to receive digital signals (digital signals in the first simulation data) from the converter controller; I / O communication board C is used by the RT-LAB simulation device to send analog signals (second simulation data) to the Bladed simulation device; and I / O communication board D is used by the RT-LAB simulation device to receive analog signals (fourth simulation data) from the Bladed simulation device. The I / O communication boards are expensive, resulting in significant simulation costs.

[0035] In this embodiment, the Bladed simulation device and the RT-LAB simulation device are not directly connected; instead, they communicate bidirectionally in real-time via the converter controller and / or the main controller. This requires three I / O communication boards: E, F, and G. Board E is used by the RT-LAB simulation device to send analog signals (analog signals from the first simulation data and the second simulation data) to the converter controller. Board F is used by the RT-LAB simulation device to receive digital signals (digital signals from the first simulation data) from the converter controller. Board G is used by the RT-LAB simulation device to receive analog signals (fourth simulation data) from the main controller. The reduced number of I / O communication boards saves on simulation costs.

[0036] (2) According to Figure 1 As can be seen, the main controller serves as the Master in cross-platform simulation communication, while the Bladed and RT-LAB simulation devices act as Slaves. The main controller possesses stronger clock calibration capabilities compared to the simulation software, thus ensuring the real-time performance of cross-platform simulation and improving its accuracy.

[0037] Please see Figure 2The 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, etc. The first host computer may include a host computer for the converter controller, used for configuring the converter controller. The second host computer may include a host computer for the RT-LAB simulator, used for configuring the RT-LAB simulation equipment. For example, the second host computer can compile and download the electrical part model of the wind turbine to the RT-LAB simulation equipment. The third host computer can be used as a Bladed simulation equipment. The third host computer can run GH Bladed software, achieving real-time simulation through the accompanying Hardware test program. Of course, the third host computer can also be used as a host computer for the main controller, used for configuring the main controller.

[0038] Based on the wind turbine simulation system described in the embodiments of this specification, a corresponding simulation method is also provided in the embodiments of this specification. Please refer to... Figure 3 and Figure 4 The simulation method may include the following steps.

[0039] Step S31: Set steady-state operating conditions using the Bladed simulation device, which is connected to the main controller.

[0040] Step S33: Set the fault voltage condition using the RT-LAB simulation device, which is connected to the converter controller and the main controller.

[0041] Step S35: After the main controller sends the start command, the fault voltage is applied.

[0042] Step S37: Obtain the voltage and current responses of the wind turbine before and after fault ride using the RT-LAB simulation equipment.

[0043] Step S39: If the converter controller is not out of the grid due to a fault, calculate a preset index based on the voltage response and current response. The preset index is used to represent the fault ride-through characteristics of the wind turbine.

[0044] In some embodiments, the converter controller of the wind turbine can be connected to the RT-LAB simulation device, the main controller of the wind turbine can be connected to the Bladed simulation device, and the converter controller and main controller of the wind turbine can be connected using communication methods such as CAN. For example, the converter controller of the wind turbine can be connected to the RT-LAB simulation device via an I / O board, the main controller of the wind turbine can be connected to the Bladed simulation device via a communication model, and the converter controller and main controller of the wind turbine can be connected using CAN communication.

[0045] In some embodiments, the operating wind condition may include wind speed. The wind speed can be specifically set according to the wind power curve. For example, the wind speed corresponding to the high wind condition and the wind speed corresponding to the low wind condition can be selected according to the wind power curve. The high wind condition can be P>0.9Pn, and the low wind condition can be 0.1Pn<P<0.3Pn, where 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, turbulent wind can also be selected to be added.

[0046] In some embodiments, the fault voltage condition may include the amplitude and time of the fault voltage. The voltage fault can be realized based on the impedance voltage division method. The amplitude and time can be set according to the requirements of the wind turbine connected to the power system.

[0047] In some embodiments, after the main controller issues the startup instruction and the simulation system runs stably, the fault voltage is added. The voltage and current responses of the wind turbine are detected by the RT-LAB simulation device. It can be detected whether the converter controller reports a fault and trips out of the network. If there is no fault and tripping out of the network, 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 characteristics of the wind turbine. The preset index may include the active power, reactive power, reactive current response, etc. of the wind turbine before and after the fault ride-through. If there is a fault and tripping out of the network, the control strategy of the converter controller can be corrected. After the correction, steps S35 - step S39 can be repeated.

[0048] In some embodiments, steps S31 - step S39 can be iteratively executed until the iteration end condition is met. Thus, multiple groups of preset indexes corresponding to multiple fault voltage conditions can be obtained. The fault ride-through characteristic curve of the wind turbine can be drawn according to the multiple groups of preset indexes. For example, the fault voltage condition in step S33 can be modified, and steps S35 - step S39 can be repeated. Thus, multiple groups of preset indexes corresponding to multiple fault voltage conditions can be obtained, and then the fault ride-through characteristic curve of the wind turbine can be drawn. For example, Figures 5a-5d is the low voltage ride-through characteristic curve of the wind turbine. Among them, Figure 5a is the terminal voltage curve, where the abscissa represents time and the ordinate represents the terminal voltage. Figure 5b is the active power curve, where the abscissa represents time and the ordinate represents the active power. Figure 5c is the reactive power curve, where the abscissa represents time and the ordinate represents the reactive power. Figure 5d is the generator speed curve, where the abscissa represents time and the ordinate represents the generator speed. Figures 5a-5dIn this specification, "master controller with model" indicates the simulation system of an embodiment, meaning the simulation system includes an RT-LAB simulation device, a converter controller, a master controller, and a bladed simulation device. "Master controller without model" indicates the simulation system includes an RT-LAB simulation device, a converter controller, and a master controller, but lacks a bladed simulation device. "Single converter" indicates the simulation system includes an RT-LAB simulation device and a converter controller, but lacks a master controller and a bladed simulation device.

[0049] The simulation method in the embodiments of this specification takes into account the coordinated role of the main controller and the converter controller during the simulation test, and reflects the full-process control characteristics of the wind turbine before and after the fault ride-through process, which is close to the actual engineering practice.

[0050] In the 1990s, improvements to a technology could be clearly distinguished as either hardware improvements (e.g., improvements to the circuit structure of diodes, transistors, switches, etc.) or software improvements (improvements to the methodology). However, with technological advancements, many methodological improvements today can be considered direct improvements to the hardware circuit structure. Designers almost always obtain the corresponding hardware circuit structure by programming the improved methodology into the hardware circuit. Therefore, it cannot be said that a methodological improvement cannot be implemented using hardware physical modules. For example, a Programmable Logic Device (PLD) (such as a Field Programmable Gate Array (FPGA)) is such an integrated circuit whose logic function is determined by the user programming the device. Designers can program and "integrate" a digital system onto a PLD themselves, without needing chip manufacturers to design and manufacture dedicated integrated circuit chips. Furthermore, nowadays, instead of manually manufacturing integrated circuit chips, this programming is mostly implemented using "logic compiler" software. Similar to the software compiler used in program development, the original code before compilation must be written in a specific programming language, called a Hardware Description Language (HDL). There are many HDLs, 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, and RHDL (Ruby Hardware Description Language). Currently, the most commonly used are VHDL (Very-High-Speed ​​Integrated Circuit Hardware Description Language) and Verilog. Those skilled in the art should understand that by simply performing some logic programming on the method flow using one of these hardware description languages ​​and programming it into an integrated circuit, the hardware circuit implementing the logical method flow can be easily obtained.

[0051] The systems, devices, modules, or units described in the above embodiments can be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. A computer can be a personal computer, laptop computer, cellular phone, camera phone, smartphone, personal digital assistant, media player, navigation device, email device, game console, tablet computer, wearable device, or any combination of these devices.

[0052] This specification can be described in the general context of computer-executable instructions that are executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform a specific task or implement a specific abstract data type. This specification can also be practiced in distributed computing environments, where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program modules can reside in local and remote computer storage media, including storage devices.

[0053] Those skilled in the art will understand that the descriptions of the various embodiments have different focuses, and parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments. Furthermore, it is understood that those skilled in the art, after reading this specification, can conceive of any combination of some or all of the embodiments listed in this specification without creative effort, and such combinations are also within the scope of disclosure and protection of this specification.

[0054] Although this specification has been described by way of examples, those skilled in the art will recognize that many variations and modifications are possible with respect to this specification, and it is intended that the appended claims cover such variations and modifications without departing from the spirit of this specification.

Claims

1. A simulation system for wind turbine generators, characterized in that, The system includes an RT-LAB simulation device and a Bladed simulation device. The RT-LAB simulation device communicates unidirectionally with the main controller in real time. The Bladed simulation device communicates bidirectionally with the main controller in real time. The Bladed simulation device and the RT-LAB simulation device communicate bidirectionally in real time via a converter controller and / or the main controller. The RT-LAB simulation device is equipped with an electrical component model of a wind turbine. The RT-LAB simulation device is connected to the wind turbine's converter controller and main controller. It is used to transmit first simulation data between the converter controller and the electrical component model, and to send second simulation data to the Blended simulation device via the converter controller and main controller. The first simulation data includes analog and digital quantities. The RT-LAB simulation device sends the analog quantities from the first simulation data to the converter controller via a first I / O communication board, and receives the digital quantities from the first simulation data sent by the converter controller via a second I / O communication board. The RT-LAB simulation device sends the second simulation data to the converter controller via the first I / O communication board, the converter controller sends the second simulation data to the main controller, and the main controller sends the second simulation data to the Blended simulation device. The Bladed simulation device is equipped with an aerodynamic model of a wind turbine. The Bladed simulation device is connected to the main controller of the wind turbine and is used to transmit third simulation data between the aerodynamic model and the main controller, and to send fourth simulation data to the RT-LAB simulation device via the main controller. Specifically, the Bladed simulation device sends the fourth simulation data to the main controller, the main controller sends the fourth simulation data to the RT-LAB simulation device through a third I / O communication board, and the RT-LAB simulation device receives the fourth simulation data through the third I / O communication board. The main controller is the master terminal, and the Bladed simulation device and the RT-LAB simulation device are the slave terminals. The main controller is used to add a fault voltage after the simulation system has stabilized. The RT-LAB simulation device is also used to acquire the voltage and current responses of the wind turbine before and after fault ride-through. The voltage and current responses are used to analyze the fault ride-through characteristics of the wind turbine.

2. The simulation system according to claim 1, characterized in that, The wind turbine units include doubly fed wind turbine units.

3. The simulation system according to claim 1, characterized in that, The RT-LAB simulation device is connected to the main controller and the converter controller via DB37 communication, and the Bladed simulation device is connected to the main controller via TCP / IP communication.

4. The simulation system according to claim 1, characterized in that, The simulation system includes a first host computer and a second host computer. The first host computer includes a host computer for a converter controller, and the second host computer includes a host computer for an RT-LAB simulation device. The Bladed simulation device includes a third host computer, which is a host computer for a main controller.

5. The simulation system according to claim 1, characterized in that, The second simulation data includes the generator electromagnetic torque, the third simulation data includes analog quantities, and the fourth simulation data includes the generator speed.

6. A simulation method based on the simulation system of any one of claims 1 to 5, characterized in that, include: The steady-state operating conditions are set using a Bladed simulation device, which is connected to the main controller. The fault voltage condition is set using an RT-LAB simulation device, which is connected to the converter controller and the main controller. After the main controller issues the start command, the fault voltage is applied. The voltage and current responses of the wind turbine before and after fault ride were obtained using RT-LAB simulation equipment. In the absence of grid disconnection due to a fault in the converter controller, a preset index is calculated based on the voltage and current responses. This preset index is used to represent the fault ride-through characteristics of the wind turbine.

7. The simulation method according to claim 6, characterized in that, The operating wind conditions include wind speed, and the fault voltage conditions include the amplitude and duration of the fault voltage.

8. The simulation method according to claim 6, characterized in that, The preset indicators include at least one of the following: active power, reactive power, and reactive current response.

9. The simulation method according to claim 6, characterized in that, The method further includes: In the event of a converter controller failure and grid disconnection, the control strategy of the converter controller is modified.

10. The simulation method according to claim 6, characterized in that, The method further includes: The above steps are executed iteratively: setting steady-state operating conditions, setting fault voltage conditions, adding fault voltage, obtaining voltage and current responses, and calculating preset indicators, until the iteration termination condition is met. Fault ride-through characteristic curves of wind turbines were plotted based on multiple sets of preset indicators.

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