Simulation system and method of wind generating set

Abstract

The invention provides a simulation system and method of a wind generating set. Relates to the technical field of wind power generation and comprises an AC / DC converter, a DC / AC converter and a controller. The DC / AC converter is provided with an output interface for connecting load equipment; the AC / DC converter is provided with an AC power supply input interface, and the AC / DC converter converts input first AC electric energy into DC electric energy; the controller determines available power based on the current wind speed parameter; generating a rotating speed control signal based on the available power and the feedback power of the load equipment; generating a voltage control parameter based on the rotating speed control signal and an equipment characteristic parameter of the wind generating set; and the DC / AC converter converts the direct current electric energy into second alternating current electric energy based on the voltage control parameter or the preset constant voltage parameter and outputs the second alternating current electric energy to the outside. According to the mode, comprehensive real-time simulation and dynamic response of the wind generating set can be realized, the simulation cost is low, and simulation parameters are more comprehensive.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, and in particular to a simulation system and method for wind turbine generator sets. Background Technology

[0002] In the research and development and testing of wind power generation systems, it is necessary to conduct tests on wind turbine generator sets. The construction of physical test platforms is costly and time-consuming; while digital simulation tools are difficult to fully simulate the characteristics of wind turbine generator sets and have significant limitations. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a simulation system and method for wind turbine generator sets, so as to achieve comprehensive real-time simulation and dynamic response of wind turbine generator sets, with low simulation cost and more comprehensive simulation parameters.

[0004] In a first aspect, embodiments of this application provide a simulation system for a wind turbine generator set. The system includes: an AC / DC converter, a DC / AC converter, and a controller. The AC / DC converter is connected to the DC / AC converter, and the DC / AC converter has an output interface for connecting a load device. The AC / DC converter is configured with an AC power input interface, which converts first AC power input into DC power. The controller determines available power based on current wind speed parameters. Based on the available power and the feedback power of the load device, it generates a speed control signal. Based on the speed control signal and the device characteristic parameters of the wind turbine generator set, it generates voltage control parameters. The DC power is transmitted to the DC / AC converter, which converts the DC power into second AC power based on the voltage control parameters or preset constant voltage parameters and outputs it externally through the output interface.

[0005] In some embodiments, the controller is further configured to: acquire a preset wind speed curve; wherein the wind speed curve includes at least one wind speed parameter arranged in a preset order; acquire wind speed parameters from the wind speed curve in a preset order; wherein the acquired wind speed parameter is the current wind speed parameter.

[0006] In some embodiments, the controller is further configured to: acquire equipment characteristic parameters of the wind turbine generator set; wherein the equipment characteristic parameters include one or more of the following: generator speed setting parameters, power setting parameters, voltage setting parameters, and inertia setting parameters.

[0007] In some embodiments, the controller is further configured to: input the current wind speed parameters into a preset wind energy capture model and output the available power.

[0008] In some embodiments, the controller is further configured to: input the available power and the feedback power of the load device into a preset speed control model and output a speed control signal; adjust the current speed parameters of the wind turbine generator based on the speed control signal; and generate voltage control parameters based on the adjusted current speed parameters; wherein the voltage control parameters include: voltage amplitude and voltage frequency.

[0009] In some embodiments, the controller is further configured to: acquire voltage input parameters of the load device; if the voltage input parameters indicate that the input voltage of the load device is variable, send voltage control parameters to the DC / AC converter; the DC / AC converter outputs a second AC power based on the voltage control parameters; if the voltage input parameters indicate that the input voltage of the load device is not variable, control the DC / AC converter to output a second AC power based on preset constant voltage parameters.

[0010] In some embodiments, the controller is further configured to: in response to a shutdown command, control the current speed parameter of the wind turbine generator set to gradually decrease at a preset speed until the DC / AC converter stops outputting electrical energy; or, acquire a preset speed threshold of the wind turbine generator set; in response to the current speed parameter of the wind turbine generator set being lower than the preset speed threshold, control the current speed parameter of the wind turbine generator set to gradually decrease at a preset speed until the DC / AC converter stops outputting electrical energy.

[0011] In some embodiments, the controller is further configured to: generate a power instruction containing available power; wherein the power instruction is configured to: control the operating power of the load device; and send the power instruction to the load device.

[0012] In some embodiments, the controller is further configured to: receive feedback power sent by the load device; or detect a specified power parameter at the DC output terminal of the DC / AC converter to determine the feedback power of the load device through the specified power parameter.

[0013] Secondly, embodiments of this application provide a simulation method for a wind turbine generator set, which is applied to the aforementioned simulation system. The system includes an AC / DC converter, a DC / AC converter, and a controller. The method includes: the AC / DC converter converting input first AC power into DC power; the controller determining available power based on current wind speed parameters; generating a speed control signal based on available power and feedback power from the load device; generating voltage control parameters based on the speed control signal and the device characteristic parameters of the wind turbine generator set; sending the voltage control parameters to the DC / AC converter; and transmitting DC power to the DC / AC converter, which converts the DC power into second AC power based on the voltage control parameters or preset constant voltage parameters and outputs it externally.

[0014] The aforementioned simulation system and method for wind turbine generators allow for flexible configuration of current wind speed parameters and equipment characteristic parameters of the wind turbine generators. This enables the simulation of the operating and load characteristics of the wind turbine generators under the influence of various wind speed parameters, achieving comprehensive real-time simulation and dynamic response of the wind turbine generators. The simulation cost is low and the simulation parameters are more comprehensive.

[0015] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this application or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a simulation system for a wind turbine generator set provided in an embodiment of this application; Figure 2 A schematic diagram illustrating the process of controlling the output of a second AC power by a DC / AC converter based on current wind speed parameters and feedback power from the load device, provided in an embodiment of this application. Figure 3 A schematic diagram of another simulation system for a wind turbine generator provided in this application embodiment; Figure 4 A flowchart illustrating a simulation method for a wind turbine generator set provided in this application embodiment; Figure 5 A flowchart of another simulation method for a wind turbine generator set provided in an embodiment of this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] In related technologies, when simulating wind turbine generator sets using digital simulation tools, it is difficult to fully simulate the characteristics of wind turbine generator sets in terms of real-time performance, control closed-loop response, and hardware-in-the-loop testing. Based on this, the embodiments of this application provide a simulation system and method for wind turbine generator sets, which can be applied to the simulation, research and development, and testing of wind turbine generator sets.

[0020] To facilitate understanding of this embodiment, a simulation system for a wind turbine generator disclosed in this application will first be described in detail, such as... Figure 1 As shown, the system includes: an AC / DC converter 10, a DC / AC converter 11, and a controller 12; the AC / DC converter 10 and the DC / AC converter 11 are connected; the DC / AC converter 11 has an output interface 110 for connecting a load device; the load device can be a hydrogen production device or other electrical equipment. The AC / DC converter 10, the DC / AC converter 11, and the controller 12 are all physical devices.

[0021] The AC / DC converter 10 is equipped with an AC power input interface 100. The AC / DC converter 10 converts the first AC power input through the AC power input interface 100 into DC power. The first AC power can be provided by the power grid, or by other power supply devices or energy storage devices. The AC / DC converter outputs stable DC power. The electrical parameters of the DC power output by the AC / DC converter, such as voltage and current, can be controlled by a controller.

[0022] The controller 12 is used to determine the available power based on the current wind speed parameters; generate a speed control signal based on the available power and the feedback power of the load equipment; and generate voltage control parameters based on the speed control signal and the equipment characteristic parameters of the wind turbine generator set. The current wind speed parameters can be pre-stored in the controller or input to the controller through a human-machine interface. The current wind speed parameters are used to indicate the wind speed magnitude and can simulate the wind speed in the actual environment where the wind turbine generator set is located.

[0023] The controller can calculate the available power under the current wind speed parameters through preset models and algorithms. This available power can simulate the power output of a real wind turbine generator under the environmental wind speed indicated by the aforementioned current wind speed parameters.

[0024] The aforementioned equipment characteristic parameters of the wind turbine generator set can be pre-stored in the controller or input to the controller through a human-machine interface. These equipment characteristic parameters include generator speed setting parameters, power setting parameters, voltage setting parameters, and inertia setting parameters. These parameters are used to simulate the characteristics of the wind turbine generator set. Within the controller, a software-based wind turbine generator set can be constructed based on these equipment characteristic parameters to simulate a real wind turbine generator set.

[0025] In the controller, available power and feedback power from the load equipment can be input to a preset speed control model and algorithm, and a speed control signal can be output. This speed control signal is used to adjust the speed of the wind turbine generator set. After adjusting the speed of the wind turbine generator set through the speed control signal, the voltage output by the wind turbine generator set under the adjusted speed control can be simulated using the aforementioned equipment characteristic parameters, and the aforementioned voltage control parameters can be generated based on this voltage.

[0026] The aforementioned DC power is supplied to the aforementioned DC / AC converter 11, which converts the DC power into a second AC power based on voltage control parameters or preset constant voltage parameters and outputs it externally through the aforementioned output interface 110. Specifically, when the output interface is connected to a load device, the second AC power is used to power the load device. The DC power is output by the aforementioned AC / DC converter.

[0027] When the second AC power output by the DC / AC converter is affected by the voltage control parameters, it can be understood that the second AC power output by the DC / AC converter is affected by the wind speed under different wind speed parameters; when the second AC power output by the DC / AC converter is affected by the constant voltage parameters, it can be understood that the second AC power output by the DC / AC converter is not affected by the wind speed and the second AC power is in a constant state.

[0028] In practical implementation, the DC / AC converter can be determined based on the simulation requirements or the load device's input power requirements to output a second AC power based on voltage control parameters or constant voltage parameters. For example, if the load device requires a constant input AC power, the DC / AC converter outputs a second AC power based on constant voltage parameters; conversely, if the load device can input variable frequency or variable voltage AC power, the DC / AC converter outputs a second AC power based on voltage control parameters.

[0029] The aforementioned wind turbine generator simulation system includes an AC / DC converter, a DC / AC converter, and a controller. The AC / DC converter is connected to the DC / AC converter, and the DC / AC converter has an output interface for connecting load devices. The AC / DC converter is equipped with an AC power input interface and is used to convert the first AC power input into DC power. The controller is used to determine the available power based on the current wind speed parameters. Based on the available power and the feedback power of the load devices, a speed control signal is generated. Based on the speed control signal and the equipment characteristic parameters of the wind turbine generator, voltage control parameters are generated. The DC power is delivered to the DC / AC converter, and the DC / AC converter converts the DC power into a second AC power based on the voltage control parameters or preset constant voltage parameters and outputs it externally through the output interface.

[0030] In the above method, the current wind speed parameters and the equipment characteristic parameters of the wind turbine generator can be flexibly configured, thereby simulating the characteristics of the wind turbine generator's operation and load under the influence of various wind speed parameters, realizing comprehensive real-time simulation and dynamic response of the wind turbine generator, with low simulation cost and more comprehensive simulation parameters.

[0031] In one implementation, the controller is further configured to: acquire a preset wind speed curve; wherein the wind speed curve includes at least one wind speed parameter arranged in a preset order; acquire wind speed parameters from the wind speed curve in the preset order; wherein the acquired wind speed parameter is the current wind speed parameter. The preset order indicates the sequential order of the at least one wind speed parameter. In actual implementation, the wind speed parameters can be acquired sequentially from front to back according to the preset order, or sequentially from back to front. This preset order can be a chronological order, where the horizontal axis represents a time marker and the vertical axis represents the wind speed parameter corresponding to the time marker in the wind speed curve.

[0032] The wind speed curve can be pre-stored in the controller or input into the controller via the human-machine interface. Specifically, wind speed parameters can be acquired sequentially according to their time order, with the currently acquired wind speed parameter being the aforementioned current wind speed parameter. The wind speed curve can include one or more parameters. When simulating constant wind speed, the curve may include only one wind speed parameter, or multiple identical or similar wind speed parameters. When simulating changing wind speed, the curve includes multiple wind speed parameters, at least some of which are different.

[0033] In this method, wind speed curves are used to simulate various wind speeds in the environment where the real wind turbine is located, thereby simulating the operation of the wind turbine under the influence of various wind speed parameters and improving the flexibility of wind speed testing.

[0034] Furthermore, the aforementioned controller is also used to: acquire equipment characteristic parameters of the wind turbine generator set; wherein, the equipment characteristic parameters include one or more of the following: generator speed setting parameters, power setting parameters, voltage setting parameters, and inertia setting parameters. These equipment characteristic parameters can be input to the controller via a human-machine interface configured on the controller. These parameters are used to simulate a real wind turbine generator set in software. Based on these equipment characteristic parameters, a model of the wind turbine generator set can be established in the controller. This model is affected by the aforementioned current wind speed parameters and simulates the generation of electrical energy at the corresponding power output.

[0035] In this method, the characteristic parameters of the equipment are used to simulate the real wind turbine generator set. Users can flexibly configure the characteristic parameters of each characteristic, thereby simulating the operation of wind turbine generator sets with various characteristics under the influence of wind speed parameters, which improves the flexibility of wind speed test.

[0036] In practical implementation, the controller is also used to: control the AC / DC converter and DC / AC converter to perform modulation processing in response to a device start command. Initially, the AC / DC converter and DC / AC converter are off. The aforementioned device start command can be input into the controller through its human-machine interface, or it can be automatically generated by the controller, for example, automatically generated at a specified time. After generating or receiving the device start command, the controller controls the AC / DC converter and DC / AC converter to start and begin modulation.

[0037] The aforementioned controller is also used to: input the current wind speed parameters into a preset wind energy capture model and output the available power. This wind energy capture model is based on the principle of wind energy capture, specifically based on aerodynamic principles, simulating how wind turbine blades convert wind energy into mechanical energy, and then into electrical energy. In the controller, the current wind speed parameters simulate the amount of wind energy received by the wind turbine blades. Through control dynamics principles, the mechanical energy is calculated based on the current wind speed parameters, and then converted into electrical energy. The aforementioned available power is the amount of electrical energy that the simulated wind turbine can generate under the aforementioned current wind speed parameters.

[0038] Furthermore, the controller is used to: input the available power and the feedback power of the load device into a preset speed control model and output a speed control signal; adjust the current speed parameters of the wind turbine generator based on the speed control signal; and generate voltage control parameters based on the adjusted current speed parameters; wherein the voltage control parameters include: voltage amplitude and voltage frequency.

[0039] The speed control model controls the speed through the closed-loop control principle. After the available power and feedback power are input to the speed control model, the speed control model can calculate the speed control signal through the preset speed algorithm. The speed control signal can include a specific speed value or a speed variable, such as increasing or decreasing a specified speed.

[0040] In the controller, the wind turbine generator set is simulated using the aforementioned equipment characteristic parameters. During simulated operation, the wind turbine generator set has a current speed parameter, which is adjusted via a speed control signal to control the speed change of the wind turbine generator set. After the wind turbine generator set changes speed, the output voltage changes. The aforementioned voltage control parameters indicate the change in electrical energy output after the speed change. The voltage amplitude in the voltage control parameters is used to simulate the magnitude of the voltage after the speed change of the wind turbine generator set, and the voltage frequency is used to simulate the voltage output frequency after the speed change of the wind turbine generator set.

[0041] In one implementation, the controller is further configured to: acquire voltage input parameters of the load device; if the voltage input parameters indicate that the input voltage of the load device is variable, send voltage control parameters to the DC / AC converter; the DC / AC converter outputs a second AC power based on the voltage control parameters; if the voltage input parameters indicate that the input voltage of the load device is not variable, control the DC / AC converter to output a second AC power based on preset constant voltage parameters.

[0042] The voltage input parameters of the load device indicate its input voltage requirements. Some load devices can only input a constant voltage, while others can input a variable voltage, such as variable amplitude or variable frequency. Since the aforementioned voltage control parameters are affected by wind speed, they change with wind speed. When the load device's input voltage is variable, the voltage control parameters can control the DC / AC converter, causing its output voltage to change accordingly. When the load device's input voltage is constant (i.e., unchangeable), the voltage control parameters are no longer sent to the DC / AC converter; instead, constant voltage parameters control the DC / AC converter, ensuring a constant output voltage.

[0043] Figure 2 This diagram illustrates the process of controlling the second AC power output of a DC / AC converter using current wind speed parameters and feedback power from the load device. The current wind speed parameter is input to a wind energy capture model, which outputs available power. This available power, along with the feedback power from the load device, is input to a speed control model. Based on the speed control parameters output by this model, voltage control parameters are generated. These voltage control parameters are sent to a DC / AC tachometer, thereby adjusting the tachometer's output voltage. The second AC power corresponding to this output voltage is then input to the load device to supply power.

[0044] Furthermore, the controller is also used to: generate a power command containing available power; wherein the power command is used to: control the operating power of the load device; and send the power command to the load device. The controller establishes a communication connection with the load device, and sends the power command to the load device to inform the load device of the current available power, and the maximum operating power that the load device can reach is the available power.

[0045] The controller described above is also used to: receive feedback power sent by the load device; or detect specified power parameters at the DC output of the DC / AC converter to determine the feedback power of the load device based on the specified power parameters. If the controller establishes a communication connection with the load device, the load device can send feedback power to the controller through this communication connection. The controller can also detect specified power parameters at the DC output of the DC / AC converter, such as voltage and current parameters, and calculate the feedback power based on the voltage and current parameters.

[0046] The above method simulates the characteristics of wind turbine operation and load under the influence of wind speed parameters, performs closed-loop control on the output voltage of DC / AC converter, and realizes comprehensive real-time simulation and dynamic response of wind turbine. The simulation cost is low and the simulation parameters are more comprehensive.

[0047] In practical implementation, the controller is also used to: respond to a shutdown command, control the current speed parameter of the wind turbine generator to gradually decrease at a preset speed until the DC / AC converter stops outputting electrical energy. This shutdown command can be input through the controller's human-machine interface to control the DC / AC converter to stop outputting electrical energy. After receiving the shutdown command, the current speed parameter of the wind turbine generator is no longer affected by the wind speed parameter, but gradually decreases at a preset speed. After the current speed parameter decreases, the voltage control parameters input to the DC / AC converter control the output voltage of the DC / AC converter to gradually decrease until the DC / AC converter stops outputting electrical energy.

[0048] In another embodiment, the controller is also used to: acquire a preset speed threshold for the wind turbine generator set; and, in response to the current speed parameter of the wind turbine generator set being lower than the preset speed threshold, control the current speed parameter of the wind turbine generator set to gradually decrease at a preset speed until the DC / AC converter stops outputting electrical energy. The preset speed threshold can be stored in the controller. If the current speed parameter of the wind turbine generator set is lower than the preset speed threshold, it can be understood that the current wind speed is low, requiring undervoltage shutdown. As the current speed parameter gradually decreases at the preset speed, the voltage control parameters input to the DC / AC converter control the output voltage of the DC / AC converter to gradually decrease until the DC / AC converter stops outputting electrical energy.

[0049] This embodiment also provides another simulation system for wind turbine generator sets, such as Figure 3 As shown, the system also includes a filter 30; the filter 30 is connected to the output interface 110 of the DC / AC converter; the filter 30 is used to filter the second AC power output by the DC / AC converter, and can filter out the power of a specified frequency in the second AC power, so that the frequency of the second AC power is more stable.

[0050] The controller described above is equipped with a human-machine interface 31; this human-machine interface 31 is used to acquire at least one of the following: a preset wind speed curve, equipment characteristic parameters of the wind turbine generator, equipment start command, and shutdown command. This human-machine interface can be a terminal device, such as a mobile phone or computer, or an input device connected to the controller, such as a keyboard or mouse.

[0051] In some embodiments, the load device may be a hydrogen production device. In this case, the aforementioned filter is also connected to a hydrogen production power supply corresponding to the hydrogen production device. The hydrogen production power supply is an AC / DC converter used to convert the aforementioned second AC power into DC power to supply power to hydrogen production devices such as electrolyzers and hydrogen storage devices.

[0052] The human-machine interface of the aforementioned controller can also be connected to the management system related to the load equipment, such as the hydrogen production management system, which can send wind speed curves, equipment characteristic parameters of the wind turbine generator, equipment start commands, and shutdown commands to the controller.

[0053] The controller can automatically detect whether the aforementioned AC / DC converter and DC / AC converter have malfunctioned. If a malfunction is detected, it can generate a shutdown command or report the malfunction to the hydrogen production management system. If the hydrogen production management system detects a malfunction in the hydrogen production equipment, it can generate a shutdown command and send it to the controller.

[0054] The aforementioned simulation system for wind turbine generators can simulate the characteristics of wind turbine generators under actual operating conditions, such as input wind speed, rotational speed changes, output voltage amplitude, load-bearing capacity, and rotational speed changes; thereby simulating the operating characteristics of wind turbine generators.

[0055] like Figure 4 As shown, this embodiment also provides a simulation method for a wind turbine generator set, which is applied to the simulation system of the aforementioned embodiment; the system includes: an AC / DC converter, a DC / AC converter, and a controller; the method includes the following steps: Step S402: The AC / DC converter converts the input AC power into DC power. Step S404: The controller determines the available power based on the current wind speed parameters; generates a speed control signal based on the available power and the feedback power of the load equipment; generates voltage control parameters based on the speed control signal and the equipment characteristic parameters of the wind turbine generator set; and sends the voltage control parameters to the DC / AC converter. In step S406, DC power is supplied to the DC / AC converter, which converts the DC power into AC power based on voltage control parameters or preset constant voltage parameters and outputs it outward.

[0056] In the above method, the current wind speed parameters and the equipment characteristic parameters of the wind turbine generator can be flexibly configured, thereby simulating the characteristics of the wind turbine generator's operation and load under the influence of various wind speed parameters, realizing comprehensive real-time simulation and dynamic response of the wind turbine generator, with low simulation cost and more comprehensive simulation parameters.

[0057] like Figure 5 As shown in the figure, this embodiment also provides another simulation method for wind turbine generator sets, which includes the following steps: Step S502: Obtain the wind speed curve and the equipment characteristic parameters of the wind turbine generator set, and initialize the parameters; Step S504: In response to the device start command, control the AC / DC converter and DC / AC converter to perform modulation processing; Step S506: Input the current wind speed parameters into the preset wind energy capture model and output the available power; Step S508: Input the available power and the feedback power of the load device into the preset speed control model, and output the speed control signal; Step S510: Adjust the current speed parameters of the wind turbine generator set based on the speed control signal; Step S512: Generate voltage control parameters based on the adjusted current speed parameters; Step S514: If the voltage input parameter indicates that the input voltage of the load device is variable, then the voltage control parameter is sent to the DC / AC converter; if the voltage input parameter indicates that the input voltage of the load device is not variable, then the DC / AC converter is controlled to output the second AC power based on the preset constant voltage parameter. In step S516, in response to the shutdown command, the current speed parameter of the wind turbine generator is controlled to gradually decrease at a preset speed until the DC / AC converter stops outputting electrical energy.

[0058] The above method can simulate the characteristics of wind turbine generator operation and load based on configurable wind speed curves and input start-stop control commands. By internally configuring the equipment characteristic parameters and load feedback power of the wind turbine generator, it can realize real-time simulation and dynamic response of parameters such as wind turbine generator speed, wind turbine generator output voltage, and wind turbine generator inertia.

[0059] The wind turbine simulation system and method provided in this embodiment do not require a real wind turbine, which greatly reduces the investment cost of physical equipment for wind turbine testing; different wind turbine characteristics can be flexibly configured to simulate various operating characteristics, including rotational inertia, rotational speed and frequency; the simulation of wind turbine rotational inertia helps to study the characteristics of the interaction between the wind turbine and the load when the wind turbine is running off-grid.

[0060] Furthermore, in the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0061] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0062] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0063] Finally, it should be noted that the above embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A simulation system for a wind power plant, characterized in that The system comprises an AC / DC converter, a DC / AC converter and a controller; the AC / DC converter is connected with the DC / AC converter, and the DC / AC converter has an output interface for connecting a load device; The AC / DC converter is configured with an AC power input interface, and is used for converting first AC power input by the AC power input interface into DC power; The controller is used for determining available power based on a current wind speed parameter; generating a rotating speed control signal based on the available power and feedback power of the load device; and generating a voltage control parameter based on the rotating speed control signal and a device characteristic parameter of the wind turbine generator set; The DC power is transmitted to the DC / AC converter, and the DC / AC converter converts the DC power into second AC power based on the voltage control parameter or a preset constant voltage parameter and outputs the second AC power to the outside through the output interface.

2. The system of claim 1, wherein, The controller is further used for: obtaining a preset wind speed curve; wherein the wind speed curve comprises at least one wind speed parameter arranged in a preset order; obtaining a wind speed parameter from the wind speed curve in the preset order; wherein the obtained wind speed parameter is the current wind speed parameter.

3. The system of claim 1, wherein, The controller is further used for: obtaining a device characteristic parameter of the wind turbine generator set; wherein the device characteristic parameter comprises one or more of a generator rotating speed setting parameter, a power setting parameter, a voltage setting parameter and an inertia setting parameter.

4. The system of claim 1, wherein, The controller is further used for inputting the current wind speed parameter into a preset wind energy capturing model and outputting the available power.

5. The system of claim 1, wherein, The controller is further used for: inputting the available power and the feedback power of the load device into a preset rotating speed control model and outputting a rotating speed control signal; adjusting a current rotating speed parameter of the wind turbine generator set based on the rotating speed control signal; generating a voltage control parameter based on the adjusted current rotating speed parameter; wherein the voltage control parameter comprises a voltage amplitude and a voltage frequency.

6. The system of claim 5, wherein, The controller is further used for: obtaining a voltage input parameter of the load device; if the voltage input parameter indicates that an input voltage of the load device is variable, sending the voltage control parameter to the DC / AC converter; and the DC / AC converter outputs second AC power based on the voltage control parameter; if the voltage input parameter indicates that the input voltage of the load device is invariable, controlling the DC / AC converter to output second AC power based on a preset constant voltage parameter.

7. The system of claim 1, wherein, The controller is further used for: in response to a shutdown instruction, controlling the current rotating speed parameter of the wind turbine generator set to gradually decrease at a preset speed until the DC / AC converter stops outputting power; or, obtaining a preset rotating speed threshold of the wind turbine generator set; and in response to the current rotating speed parameter of the wind turbine generator set being lower than the preset rotating speed threshold, controlling the current rotating speed parameter of the wind turbine generator set to gradually decrease at a preset speed until the DC / AC converter stops outputting power.

8. The system of claim 1, wherein, The controller is further used for: generating a power instruction containing the available power; wherein the power instruction is used to control the operating power of the load device; sending the power instruction to the load device.

9. The system of claim 1, wherein, The controller is further configured to: receive the feedback power sent by the load device; Alternatively, detecting a specified power parameter of the DC output end of the DC / AC converter to determine the feedback power of the load device through the specified power parameter.

10. A method of simulating a wind power plant, characterized by, The method is applied to the simulation system of any one of claims 1-9; the system comprises an AC / DC converter, a DC / AC converter and a controller, and the method comprises: The AC / DC converter converts the input first alternating current power into direct current power; The controller determines the available power based on the current wind speed parameter; generates a speed control signal based on the available power and the feedback power of the load device; generates a voltage control parameter based on the speed control signal and the device characteristic parameter of the wind turbine generator; and sends the voltage control parameter to the DC / AC converter; The direct current power is transmitted to the DC / AC converter, and the DC / AC converter converts the direct current power into second alternating current power based on the voltage control parameter or a preset constant voltage parameter and outputs it externally.

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