Self-adaptive droop-based transient voltage control method, device and equipment for network construction type wind power plant, and storage medium

Abstract

The invention discloses a transient voltage control method, a transient voltage control device and transient voltage control equipment for a network construction type wind power plant based on adaptive droop, and a storage medium, and relates to the technical field of wind power generation. Determining a power control instruction for enabling the node voltage fluctuation of the grid-forming wind power plant to reach the minimum value; outputting a power control instruction to the net-forming type wind turbine; obtaining state parameters of the network-forming type wind turbine generator after responding to the power control instruction; and determining a deviation between the state parameter and the state reference value, and adjusting a network construction control parameter of the network construction type wind turbine generator according to a network construction control parameter droop coefficient of the network construction type wind turbine generator and the deviation, so that the output voltage of the network construction type wind turbine generator is in a preset voltage range and the output frequency of the network construction type wind turbine generator is in a preset frequency range, therefore, voltage oscillation and frequency oscillation are effectively suppressed when the grid-forming wind power plant is subjected to transient voltage disturbance, and the stability of the grid-forming wind power plant is improved.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, and in particular to a method, apparatus, equipment and storage medium for transient voltage control of grid-type wind farms based on adaptive droop. Background Technology

[0002] As the penetration rate of new energy sources continues to increase, the power grid exhibits characteristics of low short-circuit ratio and weak inertia, increasing the risk to the safe operation of the system. Compared with grid-connected wind turbines, grid-connected wind turbines exhibit voltage source control and self-synchronizing grid-connected characteristics, and can directly control the amplitude and phase of the output voltage, providing inertia, voltage, and damping support to the power grid.

[0003] However, when a grid-connected wind farm, composed of grid-connected wind turbines, is subjected to transient voltage disturbances, it will cause fluctuations in the active power output of the turbines, leading to frequency fluctuations. Furthermore, it will affect the reactive power balance of the turbines, resulting in voltage amplitude fluctuations. Therefore, when a grid-connected wind farm is subjected to transient voltage disturbances, it will experience voltage and frequency oscillations in the turbines, thereby reducing the stability of the grid-connected wind farm.

[0004] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The main objective of this application is to provide a transient voltage control method, device, equipment, and storage medium for grid-type wind farms based on adaptive droop, aiming to solve the technical problem that grid-type wind farms in the prior art suffer from voltage and frequency oscillations when subjected to transient voltage disturbances, which in turn leads to a decrease in the stability of the grid-type wind farm.

[0006] To achieve the above objectives, this application proposes a transient voltage control method for grid-type wind farms based on adaptive droop, the method comprising: When a transient voltage is detected in a grid-connected wind turbine, a power control command is determined to minimize the node voltage fluctuation of the grid-connected wind farm. The power control command is output to the grid-type wind turbine; Obtain the status parameters of the grid-connected wind turbine after responding to the power control command; The deviation between the state parameters and the state reference value is determined, and the grid control parameters of the grid-type wind turbine are adjusted by the droop coefficient of the grid control parameters and the deviation, so that the output voltage and output frequency of the grid-type wind turbine are within a preset voltage range and a preset frequency range.

[0007] In one embodiment, the step of determining a power control command to minimize node voltage fluctuations in the grid-connected wind farm when a transient voltage is detected in the grid-connected wind turbine includes: When a transient voltage is detected in a grid-type wind turbine, the transient voltage sensitivity equation of the grid-type wind farm is obtained. The transient voltage sensitivity equation characterizes the correspondence between the output power of the grid-type wind turbine and the node voltage fluctuation of the grid-type wind farm. The active power reference value and reactive power reference value that minimize the node voltage fluctuation are determined by the transient voltage sensitivity equation. Power control commands are generated based on the active power reference value and the reactive power reference value.

[0008] In one embodiment, before the step of obtaining the transient voltage sensitivity equation of the grid-connected wind farm when a transient voltage is detected in the grid-connected wind turbine, the method further includes: Obtain the line parameters of the grid-type wind farm and the unit parameters of the grid-type wind turbine, wherein the unit parameters include at least active power, reactive power and output voltage; The transient voltage model of the grid-type wind farm is determined based on the line parameters, active power, reactive power, and output voltage. The transient voltage model of the grid-type wind farm is as follows: In the formula, For the first i Output voltage increment of grid-type wind turbine. For the first i The increase in active power output of the grid-type wind turbine. For the first i The increase in reactive power output of the grid-type wind turbine generator set; The equation corresponding to the transient voltage model of the grid-type wind farm is used as the transient voltage sensitivity equation.

[0009] In one embodiment, the step of determining the active power reference value and reactive power reference value that minimize the node voltage fluctuation through the transient voltage sensitivity equation includes: Obtain the objective function, which is: In the formula, This represents the minimum node voltage fluctuation. For controller step size, The number of grid-connected wind turbine units. Parameters for transient voltage optimization To control the k-th step iOutput voltage of grid-type wind turbine generator set. For the first i Reference value for the output voltage of the grid-connected wind turbine; The active power reference value and reactive power reference value that minimize the node voltage fluctuation are determined by the objective function, the transient voltage sensitivity equation, the active power, and the reactive power.

[0010] In one embodiment, the step of determining the active power reference value and the reactive power reference value that minimize the node voltage fluctuation using the objective function, the transient voltage sensitivity equation, the active power, and the reactive power includes: The constraints for obtaining the output power reference value are as follows: In the formula, No. i Reference values ​​for active power of grid-connected wind turbine generators. For the first i Reference value for reactive power of grid-connected wind turbine generators. For the first i The maximum active power output of the grid-type wind turbine. For the first i The maximum reactive power output of a grid-connected wind turbine. The number of grid-connected wind turbine units; Based on the objective function, the transient voltage sensitivity equation, and the constraints of the output power reference value, the active power and the reactive power are adjusted to determine the active power reference value and the reactive power reference value that minimize the node voltage fluctuation.

[0011] In one embodiment, the state parameters include the output frequency and reactive power of the grid-connected wind turbine, and the state reference values ​​include an output frequency reference value and a reactive power reference value. The step of determining the deviation between the state parameters and the state reference values, and adjusting the grid-connected control parameters of the grid-connected wind turbine using the droop coefficient of the grid-connected wind turbine and the deviation, so that the output voltage and output frequency of the grid-connected wind turbine are within a preset voltage range and a preset frequency range, includes: The droop control optimization model adjusts the grid control parameters of the grid-connected wind turbine based on the droop coefficient, the frequency reference value, and the reactive power reference value. Within the constraints of the grid control parameters, the model outputs grid control parameter reference values ​​to the grid-connected wind turbine to ensure that the output voltage and output frequency of the grid-connected wind turbine are within a preset voltage range and a preset frequency range. The grid control parameter reference values ​​include virtual damping reference values, virtual inertia reference values, and voltage coefficient reference values. The droop control optimization model is as follows: In the formula, For the first i Virtual damping reference value for grid-type wind turbines For the first i Virtual inertia reference value for grid-type wind turbines For the first i Reference value for voltage coefficient of grid-connected wind turbine units. This refers to the virtual damping droop coefficient in the droop coefficient of the network control parameters. This refers to the virtual inertia droop coefficient in the droop coefficient of the network control parameters. The voltage coefficient droop coefficient is one of the droop coefficients in the network control parameters. For the first i Reference value for the frequency output of the grid-type wind turbine. For the first i Reference value for reactive power of grid-connected wind turbine generators. For the first i Output frequency of grid-type wind turbine generators For the first i The reactive power output of the grid-type wind turbine generator set; The constraints for the network control parameters are as follows: In the formula, For the first i The maximum virtual damping value of a grid-type wind turbine. For the first i The maximum virtual inertia of a grid-type wind turbine. For the first i The maximum voltage coefficient of the grid-type wind turbine. For the first i Minimum virtual damping of a grid-type wind turbine. For the first i Minimum virtual inertia of grid-type wind turbines For the first iMinimum voltage coefficient of grid-type wind turbine generator. The number of grid-connected wind turbine units.

[0012] In one embodiment, before the step of adjusting the grid-connected control parameters of the grid-connected wind turbine based on the grid-connected control parameter reference value, the frequency reference value, and the reactive power reference value using a droop control optimization model, and outputting the grid-connected control parameter reference value to the grid-connected wind turbine to ensure that the output voltage and output frequency of the grid-connected wind turbine are within a preset voltage range and a preset frequency range, wherein the grid-connected control parameter reference value includes a virtual damping reference value, a virtual inertia reference value, and a voltage coefficient reference value, the method further includes: Based on the line parameters and the generator parameters, a network-type transient coupling model is determined. The network-type transient coupling model is as follows: In the formula, For the first i Output frequency of the grid-type wind turbine. For the first i Reference value for the output frequency of a grid-type wind turbine. For the first i Converter voltage of grid-connected wind turbine units For the first i The reactive power output of the grid-connected wind turbine. For the first i Reference value for reactive power output of grid-connected wind turbine generators. For the first i Virtual damping of grid-type wind turbines. For the first i Virtual inertia of grid-connected wind turbines. For the first i Voltage coefficient of grid-type wind turbine generators; The preset droop control optimization model is determined based on the aforementioned network-type transient coupling model.

[0013] Furthermore, to achieve the above objectives, this application also proposes a transient voltage control device for grid-type wind farms based on adaptive droop, the device comprising: The instruction module is used to determine the power control instruction that minimizes the node voltage fluctuation of the grid-connected wind farm when a transient voltage is detected in the grid-connected wind turbine. The control module is used to output the power control command to the grid-type wind turbine; The monitoring module is used to acquire the status parameters of the grid-connected wind turbine after it responds to the power control command; The control module is also used to determine the deviation between the state parameters and the state reference values, and to adjust the grid control parameters of the grid-type wind turbine through the droop coefficient of the grid control parameters of the grid-type wind turbine and the deviation, so that the output voltage of the grid-type wind turbine is within a preset voltage range and the output frequency is within a preset frequency range.

[0014] Furthermore, to achieve the above objectives, this application also proposes a transient voltage control device for a grid-type wind farm based on adaptive droop. The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor. The computer program is configured to implement the steps of the transient voltage control method for a grid-type wind farm based on adaptive droop as described above.

[0015] In addition, to achieve the above objectives, this application also proposes a storage medium, which is a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the steps of the adaptive droop-based grid-type wind farm transient voltage control method described above.

[0016] One or more technical solutions proposed in this application have at least the following technical effects: This application determines a power control command that minimizes node voltage fluctuations in a grid-connected wind turbine when a transient voltage is detected; outputs the power control command to the grid-connected wind turbine; acquires the state parameters of the grid-connected wind turbine after responding to the power control command; determines the deviation between the state parameters and the state reference value; and adjusts the grid-connected wind turbine's grid control parameters using the droop coefficient and deviation, so that the output voltage and output frequency of the grid-connected wind turbine are within a preset voltage range and a preset frequency range. This application reduces the transient voltage of grid-connected wind turbines by outputting power control commands to minimize node voltage fluctuations in the grid-connected wind farm. Furthermore, it adjusts the grid control parameters of the wind turbines using the droop coefficient and deviation of the grid control parameters, ensuring that the output voltage and frequency of the wind turbines are within a preset voltage and frequency range. Therefore, this application can effectively suppress voltage and frequency oscillations and improve the stability of the grid-connected wind farm while reducing the transient voltage of the wind turbines during transient voltage disturbances. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a flowchart illustrating the first embodiment of the transient voltage control method for grid-type wind farms based on adaptive droop in this application. Figure 2 This is a flowchart illustrating the second embodiment of the transient voltage control method for grid-type wind farms based on adaptive droop in this application. Figure 3 This is a flowchart illustrating the third embodiment of the adaptive droop-based transient voltage control method for grid-type wind farms in this application. Figure 4 This is a schematic diagram of the module structure of the adaptive droop-based transient voltage control device for grid-type wind farms in this application. Figure 5 This is a schematic diagram of the transient voltage control device for a grid-type wind farm based on adaptive droop, as described in this application.

[0020] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0022] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0023] The main solution of this application embodiment is as follows: when a transient voltage is detected in a grid-connected wind turbine, a power control command is determined to minimize the node voltage fluctuation of the grid-connected wind farm; the power control command is output to the grid-connected wind turbine; the state parameters of the grid-connected wind turbine after responding to the power control command are obtained; the deviation between the state parameters and the state reference value is determined, and the grid-connected control parameters of the grid-connected wind turbine are adjusted by the droop coefficient of the grid-connected wind turbine and the deviation, so that the output voltage of the grid-connected wind turbine is within a preset voltage range and the output frequency is within a preset frequency range.

[0024] Due to existing technology, when grid-type wind farms are subjected to transient voltage disturbances, the grid-type wind turbines will experience voltage and frequency oscillations, which will lead to a decrease in the stability of the grid-type wind farm.

[0025] This application provides a solution that outputs a power control command to the grid-connected wind turbines to minimize node voltage fluctuations in the grid-connected wind farm, thereby reducing the transient voltage of the wind turbines. Furthermore, by adjusting the grid control parameters of the wind turbines through the droop coefficient and deviation, the output voltage and frequency of the wind turbines are kept within a preset voltage and frequency range. Therefore, this application can effectively suppress voltage and frequency oscillations and improve the stability of the grid-connected wind farm while reducing the transient voltage of the wind turbines during transient voltage disturbances.

[0026] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or an electronic device capable of performing the above functions, such as a grid-type wind farm transient voltage control device based on adaptive droop. The following description uses a grid-type wind farm transient voltage control device based on adaptive droop (hereinafter referred to as the control device) as an example to illustrate this embodiment and the following embodiments.

[0027] Based on this, embodiments of this application provide a transient voltage control method for grid-type wind farms based on adaptive droop, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the adaptive droop-based transient voltage control method for grid-type wind farms in this application.

[0028] In this embodiment, the transient voltage control method for grid-type wind farms based on adaptive droop includes steps S10 to S40: Step S10: When a transient voltage is detected in the grid-connected wind turbine, a power control command is determined to minimize the node voltage fluctuation of the grid-connected wind farm.

[0029] It should be noted that the aforementioned transient voltage can be the voltage value of the output voltage of a grid-connected wind turbine when the amplitude and frequency of the output voltage change briefly after being subjected to disturbances (such as short-circuit faults, lightning strikes, sudden load changes, etc.).

[0030] Understandably, the node voltages of the aforementioned grid-connected wind farms can be considered as changes in the steady-state values ​​of voltage amplitude and phase at various key connection points (such as the output terminals of grid-connected wind turbines, collection line connection points, and the high-voltage side of step-up transformers). When a grid-connected wind farm is disturbed, transient voltage fluctuations directly affect the stability of the node voltages. For example, when a short-circuit fault occurs in the grid, the node voltage at the output of the grid-connected wind farm will drop rapidly and then gradually rise during system recovery. During this transient process, both the amplitude and phase of the node voltage will change, potentially leading to problems such as fluctuations in the output power of each grid-connected wind turbine and increased reactive power demand within the grid-connected wind farm.

[0031] Furthermore, fluctuations in node voltage can further affect the power distribution and equipment operating status within a grid-connected wind farm, thus creating a feedback effect on the transient voltage recovery process. Excessive node voltage fluctuations can exacerbate transient voltage oscillations, prolonging the system's recovery time.

[0032] In its implementation, the aforementioned control equipment can monitor the node voltage fluctuations of a grid-connected wind farm in real time, specifically the amplitude and frequency fluctuations of the output voltage of each grid-connected wind turbine. When the node voltage fluctuations exceed a set fluctuation range (i.e., the amplitude fluctuation of any grid-connected wind turbine exceeds a pre-set amplitude fluctuation range or the frequency fluctuation exceeds a pre-set frequency fluctuation range), the control equipment determines that a transient voltage exists in the grid-connected wind turbine. Upon detecting a transient voltage in the grid-connected wind turbine, the control equipment can determine a power reference value that minimizes the node voltage fluctuations of the grid-connected wind farm based on locally stored historical power data and node voltage data, and generate a power control command that causes the grid-connected wind turbine to output that power reference value.

[0033] Step S20: Output the power control command to the grid-type wind turbine.

[0034] In a specific implementation, the aforementioned control device can output the power control command to the grid-type wind turbine that has transient voltage. The grid-type wind turbine responds to the power control command and adjusts its output power to the power reference value corresponding to the power control command, so that the voltage fluctuation of its corresponding node is minimized, thereby reducing transient voltage, improving the stability of the grid-type wind farm during transient processes, and reducing the risk of equipment failure and malfunction of protection devices.

[0035] Step S30: Obtain the status parameters of the grid-connected wind turbine after responding to the power control command.

[0036] It should be noted that the above-mentioned status parameters can be parameters that reflect the real-time operating status of grid-connected wind turbines, such as output frequency, active power, reactive power, etc.

[0037] In practice, the control equipment acquires the real-time output status parameters of the grid-type wind turbine during the process of the grid-type wind turbine responding to the power control command, so as to monitor the real-time operating status of the grid-type wind turbine after responding to the power control command.

[0038] Step S40: Determine the deviation between the state parameter and the state reference value, and adjust the grid control parameter of the grid-type wind turbine through the droop coefficient of the grid control parameter of the grid-type wind turbine and the deviation, so that the output voltage of the grid-type wind turbine is within a preset voltage range and the output frequency is within a preset frequency range.

[0039] It should be noted that the above-mentioned state reference values ​​can be the state parameters of grid-connected wind turbines under ideal conditions, such as frequency reference values ​​and reactive power reference values.

[0040] It is understood that the aforementioned preset voltage range can be a pre-set range, and when the output voltage is within the preset voltage range, it indicates that there is no voltage oscillation in the grid-connected wind turbine. Similarly, the aforementioned preset frequency range can be a pre-set range, and when the output frequency is within the preset frequency range, it indicates that there is no frequency oscillation in the grid-connected wind turbine.

[0041] It should be noted that the droop coefficient of the above-mentioned grid control parameters can be used as a parameter to control and adjust the output power and voltage of grid-type wind turbine units.

[0042] Understandably, the droop coefficient of the above-mentioned network control parameters can be used to adjust the network control parameters and can characterize the sensitivity of the network control parameters to system deviations (such as frequency deviations and reactive power deviations).

[0043] In practical implementation, the aforementioned control equipment can calculate the deviation between the state parameters and their corresponding state reference values ​​in real time, and dynamically adjust the grid control parameters using the deviation and the droop coefficient of the grid control parameters. That is, when the deviation exceeds the set threshold, the grid control parameters are adjusted by the droop coefficient of the grid control parameters, so that the grid-type wind turbine can better adapt to the dynamic changes of the system, and keep the output voltage and output frequency of the grid-type wind turbine within the preset voltage range and preset frequency range, thereby suppressing voltage oscillation and frequency oscillation.

[0044] This embodiment determines a power control command to minimize the node voltage fluctuation of the grid-connected wind turbine when a transient voltage is detected; outputs the power control command to the grid-connected wind turbine; acquires the state parameters of the grid-connected wind turbine after responding to the power control command; determines the deviation between the state parameters and the state reference value; and adjusts the grid-connected wind turbine's grid control parameters based on the droop coefficient and deviation, so that the output voltage and output frequency of the grid-connected wind turbine are within a preset voltage range and a preset frequency range. This embodiment reduces the transient voltage of grid-connected wind turbines by outputting power control commands to minimize node voltage fluctuations in the grid-connected wind farm. Furthermore, it adjusts the grid control parameters of the wind turbines using the droop coefficient and deviation of the grid control parameters, ensuring that the output voltage and frequency of the wind turbines are within a preset voltage and frequency range. Therefore, this embodiment can effectively suppress voltage and frequency oscillations and improve the stability of the grid-connected wind farm while reducing the transient voltage of the wind turbines during transient voltage disturbances.

[0045] Based on the first embodiment of this application, a second embodiment of this application is proposed. In the second embodiment, content that is the same as or similar to that in the first embodiment described above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 2 , Figure 2 This is a flowchart illustrating the second embodiment of the adaptive droop-based transient voltage control method for grid-type wind farms in this application.

[0046] In this embodiment, step S10 includes steps S101 to S103: Step S101: When a transient voltage is detected in a grid-type wind turbine, the transient voltage sensitivity equation of the grid-type wind farm is obtained.

[0047] The transient voltage sensitivity equation characterizes the correspondence between the output power of a grid-type wind turbine and the nodal voltage fluctuations of a grid-type wind farm.

[0048] In practical implementation, historical output power and historical node voltage of different grid-type wind turbines can be collected in advance, the influence of the output power of different grid-type wind turbines on node voltage fluctuations can be analyzed, and a transient voltage sensitivity equation can be constructed to characterize the correspondence between the output power of grid-type wind turbines and the node voltage fluctuations of grid-type wind farms.

[0049] In one feasible implementation, steps S01 to S03 are included before step S101: Step S01: Obtain the line parameters of the grid-type wind farm and the unit parameters of the grid-type wind turbine. The unit parameters include at least active power, reactive power and output voltage.

[0050] It should be noted that the above line parameters can be the electrical characteristic parameters of the lines used by grid-type wind farms to connect various grid-type wind turbines and transmit electrical energy to the power grid, including line resistance and line inductance, etc.

[0051] It is understandable that the above-mentioned unit parameters can refer to various electrical performance parameters exhibited by a single grid-connected wind turbine during operation, including active power, reactive power, output voltage, and output frequency.

[0052] Step S02: Determine the transient voltage model of the grid-type wind farm based on the line parameters, the active power, the reactive power, and the output voltage.

[0053] The transient voltage model of the grid-type wind farm is as follows: In the formula, For the first i Output voltage increment of grid-type wind turbine. For the first i The increase in active power output of the grid-type wind turbine. For the first i The increase in reactive power output of the grid-type wind turbine.

[0054] Step S03: Use the equation corresponding to the transient voltage model of the grid-type wind farm as the transient voltage sensitivity equation.

[0055] In practical implementation, based on the line parameters of the grid-type wind farm and the unit parameters of the grid-type wind turbines, sensitivity analysis can be used to determine the impact of output power variations of different grid-type wind turbines on voltage fluctuations at each node of the grid-type wind farm, thus constructing the aforementioned transient voltage model of the grid-type wind farm. The equations corresponding to this transient voltage model of the grid-type wind farm can then be used as transient voltage sensitivity equations.

[0056] Step S102: Determine the active power reference value and reactive power reference value that minimize the node voltage fluctuation using the transient voltage sensitivity equation.

[0057] In practical implementation, the aforementioned control equipment uses the aforementioned transient voltage sensitivity equation to determine the active power reference value and reactive power reference value that minimize the node voltage fluctuation of the grid-type wind farm as the control objective.

[0058] In one feasible implementation, step S102 includes steps S1021 to S1022: Step S1021: Obtain the objective function.

[0059] The objective function is: In the formula, This represents the minimum node voltage fluctuation. For controller step size, The number of grid-connected wind turbine units. Parameters for transient voltage optimization To control the k-th step i Output voltage of grid-type wind turbine generator set. For the first i Reference value for the output voltage of the grid-type wind turbine.

[0060] It should be noted that the above voltage reference values ​​are the optimal output voltages of grid-type wind turbines under ideal conditions.

[0061] Step S1022: Determine the reference values ​​of active power and reactive power that minimize the node voltage fluctuation using the objective function, the transient voltage sensitivity equation, the active power, and the reactive power.

[0062] In practical implementation, the aforementioned control device combines the objective function and transient voltage sensitivity equation to minimize node voltage fluctuations. Different active and reactive power values ​​are set. When determining the active and reactive power values ​​that minimize node voltage fluctuations, the determined active power is used as the active power reference value, and the determined reactive power is used as the reactive power reference value.

[0063] In one feasible implementation, step S1022 may include steps S10221 to S10222: Step S10221: Obtain the constraint conditions for the output power reference value.

[0064] The constraint condition for the output power reference value is: In the formula, No. i Reference values ​​for active power of grid-connected wind turbine generators. For the first i Reference value for reactive power of grid-connected wind turbine generators. For the first i The maximum active power output of the grid-type wind turbine. For the first iThe maximum reactive power output of the grid-type wind turbine.

[0065] Step S10222: Based on the objective function, the transient voltage sensitivity equation, and the constraints of the output power reference value, adjust the active power and the reactive power to determine the active power reference value and the reactive power reference value that minimize the node voltage fluctuation.

[0066] In practical implementation, the aforementioned control device uses the objective function to minimize node voltage fluctuations. Combining this with the transient voltage sensitivity equation, it employs optimization algorithms, such as gradient descent and particle swarm optimization, to iteratively calculate different active and reactive power values ​​within the constraints of the output power reference value. This determines the active and reactive power reference values ​​that minimize the objective function, i.e., the active and reactive power reference values ​​that minimize node voltage fluctuations.

[0067] Step S103: Generate a power control command based on the active power reference value and the reactive power reference value.

[0068] In practical implementation, the aforementioned control equipment can generate corresponding power control commands based on the active power reference value and the reactive power reference value, so as to control the active power output of the grid-type wind turbine to be the active power reference value and the reactive power to be the reactive power reference value, thereby minimizing the node voltage fluctuation.

[0069] This embodiment determines the transient voltage model of a grid-connected wind farm, i.e., the transient voltage sensitivity equation, by using the line parameters and turbine parameters of the grid-connected wind farm when transient voltage is detected in the wind turbine. The active power and reactive power are adjusted by using the objective function, the transient voltage sensitivity equation, and the constraints of the output power reference value. This determines the active power reference value and reactive power reference value that minimize the node voltage fluctuation, effectively improving the accuracy of determining the active power reference value and reactive power reference value, thereby improving the control accuracy of the grid-connected wind turbine.

[0070] Based on the first and second embodiments of this application, a third embodiment of this application is proposed. In this third embodiment, content that is the same as or similar to the first and second embodiments described above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 3 , Figure 3 This is a flowchart illustrating the third embodiment of the adaptive droop-based transient voltage control method for grid-type wind farms in this application.

[0071] In this embodiment, the state parameters include the output frequency and reactive power of the grid-type wind turbine, and the state reference values ​​include the output frequency reference value and the reactive power reference value. Step S40 includes step S401: Step S401: The droop coefficient of the grid-connected wind turbine is adjusted based on the droop coefficient of the grid-connected wind turbine, the frequency reference value, and the reactive power reference value using the droop control optimization model. Within the constraints of the grid-connected control parameters, the grid-connected control parameter reference value is output to the grid-connected wind turbine to ensure that the output voltage and output frequency of the grid-connected wind turbine are within a preset voltage range and a preset frequency range. The grid-connected control parameter reference value includes a virtual damping reference value, a virtual inertia reference value, and a voltage coefficient reference value.

[0072] The droop control optimization model is as follows: In the formula, For the first i Virtual damping reference value for grid-type wind turbines For the first i Virtual inertia reference value for grid-type wind turbines For the first i Reference value for voltage coefficient of grid-connected wind turbine units. This refers to the virtual damping droop coefficient in the droop coefficient of the network control parameters. This refers to the virtual inertia droop coefficient in the droop coefficient of the network control parameters. The voltage coefficient droop coefficient is one of the droop coefficients in the network control parameters. For the first i Reference value for the frequency output of the grid-type wind turbine. For the first i Reference value for reactive power of grid-connected wind turbine generators. For the first i Output frequency of grid-type wind turbine generators For the first i The reactive power output of the grid-type wind turbine.

[0073] The constraints for the network control parameters are as follows: In the formula, For the first i The maximum virtual damping value of a grid-type wind turbine. For the first i The maximum virtual inertia of a grid-type wind turbine. For the first i The maximum voltage coefficient of the grid-type wind turbine. For the first i Minimum virtual damping of a grid-type wind turbine. For the first i Minimum virtual inertia of grid-type wind turbines For the first i Minimum voltage coefficient of grid-type wind turbine generator. The number of grid-connected wind turbine units.

[0074] It should be noted that the above frequency reference values ​​can be considered as the optimal output frequency of grid-type wind turbines under ideal conditions.

[0075] Understandably, the aforementioned grid control parameters include virtual damping, virtual inertia, and voltage coefficient. Virtual damping can simulate the damping characteristics of a synchronous generator to suppress system oscillations; virtual inertia can simulate the inertia of a synchronous generator, affecting the wind turbine's response speed to frequency changes; and the voltage coefficient describes the droop characteristic between reactive power and voltage, affecting the speed and accuracy of voltage regulation. The aforementioned grid control parameters, specifically the droop coefficients, can include virtual damping droop coefficients for adjusting virtual damping, virtual inertia droop coefficients for adjusting virtual inertia, and voltage coefficient droop coefficients for adjusting the voltage coefficient.

[0076] It should be noted that the above-mentioned control equipment can perform adaptive droop control through the above-mentioned droop control optimization model to optimize the grid control parameters and achieve suppression of voltage oscillation and frequency oscillation of wind turbine units.

[0077] Specifically, the aforementioned control equipment can dynamically adjust the virtual damping based on the deviation between the output frequency of the grid-type wind turbine and the frequency reference value using a virtual damping droop coefficient, thereby obtaining a virtual damping reference value and outputting the virtual damping reference value to the grid-type wind turbine. After receiving the virtual damping reference value, the grid-type wind turbine will adjust its virtual damping so that the adjusted virtual damping is equal to or close to the virtual damping reference value, thereby changing its damping characteristics to frequency changes and enhancing its ability to suppress frequency oscillations.

[0078] Based on the aforementioned droop control optimization model, the control equipment can dynamically adjust the virtual inertia using a virtual inertia droop coefficient according to the deviation between the output frequency of the grid-type wind turbine and the frequency reference value, obtain a virtual inertia reference value, and output the virtual inertia reference value to the grid-type wind turbine. After receiving the virtual inertia reference value, the grid-type wind turbine will adjust its virtual inertia so that the adjusted virtual inertia is equal to or close to the virtual inertia reference value, thereby improving its buffering ability against frequency changes, slowing down the rate of frequency change, and keeping the output frequency within the preset frequency range, thus suppressing frequency oscillation.

[0079] The aforementioned control equipment, based on the aforementioned droop control optimization model, dynamically adjusts the voltage coefficient using the voltage coefficient droop coefficient according to the deviation between the reactive power output of the grid-connected wind turbine and the reactive power reference value, obtains the voltage coefficient reference value, and outputs the voltage coefficient reference value to the grid-connected wind turbine. After receiving the voltage coefficient reference value, the grid-connected wind turbine adjusts its voltage coefficient to make the adjusted voltage coefficient equal to or close to the voltage coefficient reference value, and uses the voltage coefficient reference value to adjust its reactive power output characteristics. When the output voltage deviates, the grid-connected wind turbine changes the reactive power output according to the voltage coefficient droop coefficient to stabilize the output voltage, keep the output voltage within the preset voltage range, and suppress voltage oscillation.

[0080] In one feasible implementation, steps S4011-S4012 are included before step S401: Step S4011: Determine the network-type transient coupling model based on the line parameters and the unit parameters.

[0081] The network-type transient coupling model is as follows: In the formula, For the first i Output frequency of the grid-type wind turbine. For the first i Reference value for the output frequency of a grid-type wind turbine. For the first i Converter voltage of grid-connected wind turbine units For the first i The reactive power output of the grid-connected wind turbine. For the first i Reference value for reactive power output of grid-connected wind turbine generators. For the first i Virtual damping of grid-type wind turbines. For the first i Virtual inertia of grid-connected wind turbines. For the first i Voltage coefficient of grid-type wind turbine generators.

[0082] Step S4012: Determine the droop control optimization model based on the network-type transient coupling model.

[0083] In practical implementation, line parameters and unit parameters can be used to combine the virtual synchronous control equation with the transient voltage model based on the virtual synchronous control method. This establishes a grid-type transient coupling model between the grid control parameters and output frequency and output voltage of the above-mentioned wind turbines with different grid configurations. The above-mentioned droop control optimization model is then derived through the grid-type transient coupling model.

[0084] This embodiment determines a grid-type transient coupling model based on the line parameters and the turbine parameters. A preset droop control optimization model is then determined based on this model. The droop control optimization model adjusts the grid-type wind turbine's grid control parameters based on the droop coefficient of the grid control parameters, the frequency reference value, and the reactive power reference value. Within the constraints of the grid control parameters, reference values ​​for the grid control parameters are output to the grid-type wind turbine to ensure that the output voltage and frequency of the wind turbine are within a preset voltage and frequency range. These reference values ​​include virtual damping reference values, virtual inertia reference values, and voltage coefficient reference values. This achieves adaptive droop control optimization of the grid control parameters, further improving the voltage and frequency oscillation suppression capability of the grid-type wind turbine and effectively enhancing the transient voltage support capability of the grid-type wind farm.

[0085] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the transient voltage control method for grid-type wind farms based on adaptive droop. Any simple modifications based on this technical concept are within the scope of protection of this application.

[0086] This application also provides a transient voltage control device for grid-type wind farms based on adaptive droop, please refer to... Figure 4 , Figure 4 This is a schematic diagram of the module structure of the adaptive droop-based transient voltage control device for grid-type wind farms in this application.

[0087] The adaptive droop-based grid-type wind farm transient voltage control device includes: Instruction module 10 is used to determine a power control instruction that minimizes the node voltage fluctuation of the grid-connected wind farm when a transient voltage is detected in the grid-connected wind turbine. Control module 20 is used to output the power control command to the grid-type wind turbine; Monitoring module 30 is used to acquire the status parameters of the grid-connected wind turbine after responding to the power control command; The control module 20 is also used to determine the deviation between the state parameters and the state reference values, and to adjust the grid control parameters of the grid-type wind turbine through the droop coefficient of the grid control parameters of the grid-type wind turbine and the deviation, so that the output voltage of the grid-type wind turbine is within a preset voltage range and the output frequency is within a preset frequency range.

[0088] The adaptive droop-based transient voltage control device for grid-connected wind farms provided in this application employs the adaptive droop-based transient voltage control method for grid-connected wind farms described in the above embodiments. This addresses the technical problem in existing technologies where transient voltage disturbances cause voltage and frequency oscillations in grid-connected wind turbines, leading to reduced stability of the grid-connected wind farm. Compared to existing technologies, the beneficial effects of the adaptive droop-based transient voltage control device for grid-connected wind farms provided in this application are the same as those of the adaptive droop-based transient voltage control method for grid-connected wind farms described in the above embodiments. Furthermore, other technical features of the adaptive droop-based transient voltage control device are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0089] This application provides a transient voltage control device for a grid-connected wind farm based on adaptive droop. The transient voltage control device for a grid-connected wind farm based on adaptive droop includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the transient voltage control method for a grid-connected wind farm based on adaptive droop described in Embodiment 1 above.

[0090] The following is for reference. Figure 5 , Figure 5 This is a schematic diagram of the adaptive droop-based transient voltage control device for grid-connected wind farms according to this application. The adaptive droop-based transient voltage control device for grid-connected wind farms in this application can include, but is not limited to, mobile terminals such as mobile phones, laptops, digital radio receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), and vehicle terminals (e.g., vehicle navigation terminals), as well as fixed terminals such as digital TVs and desktop computers. Figure 5 The transient voltage control device for grid-type wind farms based on adaptive droop shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments in this application.

[0091] like Figure 5As shown, the adaptive droop-based grid-connected wind farm transient voltage control device may include a processing unit 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for the operation of the adaptive droop-based grid-connected wind farm transient voltage control device. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to I / O interface 1006: input devices 1007 including, for example, touchscreens, touchpads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, etc.; output devices 1008 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 1003 including, for example, magnetic tapes, hard disks, etc.; and communication devices 1009. Communication device 1009 allows the adaptive droop-based grid-connected wind farm transient voltage control equipment to exchange data with other devices wirelessly or via wired communication. Although the figure shows an adaptive droop-based grid-connected wind farm transient voltage control equipment with various systems, it should be understood that it is not required to implement or possess all the systems shown. More or fewer systems may be implemented alternatively.

[0092] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0093] The adaptive droop-based transient voltage control device for grid-connected wind farms provided in this application employs the adaptive droop-based transient voltage control method for grid-connected wind farms described in the above embodiments. This addresses the technical problem in existing technologies where transient voltage disturbances cause voltage and frequency oscillations in grid-connected wind turbines, leading to reduced stability of the grid-connected wind farm. Compared to existing technologies, the beneficial effects of the adaptive droop-based transient voltage control device for grid-connected wind farms provided in this application are the same as those of the adaptive droop-based transient voltage control method for grid-connected wind farms described in the above embodiments. Furthermore, other technical features of this adaptive droop-based transient voltage control device are the same as those disclosed in the previous embodiment, and will not be repeated here.

[0094] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0095] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0096] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, which are used to execute the adaptive droop-based transient voltage control method for grid-type wind farms in the above embodiments.

[0097] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0098] The aforementioned computer-readable storage medium may be included in the adaptive droop-based grid-type wind farm transient voltage control device; or it may exist independently and not assembled into the adaptive droop-based grid-type wind farm transient voltage control device.

[0099] The aforementioned computer-readable storage medium carries one or more programs. When these programs are executed by the adaptive droop-based grid-type wind farm transient voltage control device, the adaptive droop-based grid-type wind farm transient voltage control device: upon detecting a transient voltage in the grid-type wind turbine, determines a power control command that minimizes the node voltage fluctuation of the grid-type wind farm; outputs the power control command to the grid-type wind turbine; acquires the state parameters of the grid-type wind turbine after responding to the power control command; determines the deviation between the state parameters and the state reference value; and adjusts the grid control parameters of the grid-type wind turbine based on the droop coefficient and the deviation, so that the output voltage and output frequency of the grid-type wind turbine are within a preset voltage range and a preset frequency range.

[0100] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0101] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0102] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0103] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the aforementioned adaptive droop-based transient voltage control method for grid-connected wind farms. This solves the technical problem that existing grid-connected wind farms experience voltage and frequency oscillations when subjected to transient voltage disturbances, leading to reduced stability of the grid-connected wind farm. Compared to the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the adaptive droop-based transient voltage control method for grid-connected wind farms provided in the above embodiments, and will not be elaborated upon here.

[0104] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A transient voltage control method for a grid-type wind farm based on adaptive droop, characterized in that, The method includes: When a transient voltage is detected in a grid-connected wind turbine, a power control command is determined to minimize the node voltage fluctuation of the grid-connected wind farm. The power control command is output to the grid-type wind turbine; Obtain the status parameters of the grid-connected wind turbine after responding to the power control command; The deviation between the state parameters and the state reference value is determined, and the grid control parameters of the grid-type wind turbine are adjusted by the droop coefficient of the grid control parameters and the deviation, so that the output voltage and output frequency of the grid-type wind turbine are within a preset voltage range and a preset frequency range.

2. The transient voltage control method for grid-type wind farms based on adaptive droop as described in claim 1, characterized in that, The step of determining a power control command to minimize node voltage fluctuations in a grid-connected wind farm when a transient voltage is detected in a grid-connected wind turbine includes: When a transient voltage is detected in a grid-type wind turbine, the transient voltage sensitivity equation of the grid-type wind farm is obtained. The transient voltage sensitivity equation characterizes the correspondence between the output power of the grid-type wind turbine and the node voltage fluctuation of the grid-type wind farm. The active power reference value and reactive power reference value that minimize the node voltage fluctuation are determined by the transient voltage sensitivity equation. Power control commands are generated based on the active power reference value and the reactive power reference value.

3. The transient voltage control method for grid-type wind farms based on adaptive droop as described in claim 2, characterized in that, Before the step of obtaining the transient voltage sensitivity equation of the grid-connected wind farm when a transient voltage is detected in the grid-connected wind turbine, the method further includes: Obtain the line parameters of the grid-type wind farm and the unit parameters of the grid-type wind turbine, wherein the unit parameters include at least active power, reactive power and output voltage; The transient voltage model of the grid-type wind farm is determined based on the line parameters, active power, reactive power, and output voltage. The transient voltage model of the grid-type wind farm is as follows: In the formula, For the first i Output voltage increment of grid-type wind turbine. For the first i The increase in active power output of the grid-type wind turbine. For the first i The increase in reactive power output of the grid-type wind turbine generator set; The equation corresponding to the transient voltage model of the grid-type wind farm is used as the transient voltage sensitivity equation.

4. The transient voltage control method for grid-type wind farms based on adaptive droop as described in claim 3, characterized in that, The step of determining the active power reference value and reactive power reference value that minimize the node voltage fluctuation through the transient voltage sensitivity equation includes: Obtain the objective function, which is: In the formula, This represents the minimum node voltage fluctuation. For controller step size, The number of grid-connected wind turbine units. Parameters for transient voltage optimization To control the k-th step i Output voltage of grid-type wind turbine generator set. For the first i Reference value for the output voltage of the grid-connected wind turbine; The active power reference value and reactive power reference value that minimize the node voltage fluctuation are determined by the objective function, the transient voltage sensitivity equation, the active power, and the reactive power.

5. The transient voltage control method for grid-type wind farms based on adaptive droop as described in claim 4, characterized in that, The step of determining the active power reference value and reactive power reference value that minimize the node voltage fluctuation through the objective function, the transient voltage sensitivity equation, the active power, and the reactive power includes: The constraints for obtaining the output power reference value are as follows: In the formula, No. i Reference values ​​for active power of grid-connected wind turbine generators. For the first i Reference value for reactive power of grid-connected wind turbine generators. For the first i The maximum active power output of the grid-type wind turbine. For the first i The maximum reactive power output of a grid-connected wind turbine. The number of grid-connected wind turbine units; Based on the objective function, the transient voltage sensitivity equation, and the constraints of the output power reference value, the active power and the reactive power are adjusted to determine the active power reference value and the reactive power reference value that minimize the node voltage fluctuation.

6. The transient voltage control method for grid-type wind farms based on adaptive droop as described in claim 3, characterized in that, The state parameters include the output frequency and reactive power of the grid-connected wind turbine, and the state reference values ​​include the output frequency reference value and the reactive power reference value. The step of determining the deviation between the state parameters and the state reference values, and adjusting the grid-connected control parameters of the grid-connected wind turbine using the droop coefficient of the grid-connected wind turbine and the deviation, so that the output voltage and output frequency of the grid-connected wind turbine are within a preset voltage range and a preset frequency range, includes: The droop control optimization model adjusts the grid control parameters of the grid-connected wind turbine based on the droop coefficient, the frequency reference value, and the reactive power reference value. Within the constraints of the grid control parameters, the model outputs grid control parameter reference values ​​to the grid-connected wind turbine to ensure that the output voltage and output frequency of the grid-connected wind turbine are within a preset voltage range and a preset frequency range. The grid control parameter reference values ​​include virtual damping reference values, virtual inertia reference values, and voltage coefficient reference values. The droop control optimization model is as follows: In the formula, For the first i Virtual damping reference value for grid-type wind turbines For the first i Virtual inertia reference value for grid-type wind turbines For the first i Reference value for voltage coefficient of grid-connected wind turbine units. This refers to the virtual damping droop coefficient in the droop coefficient of the network control parameters. This refers to the virtual inertia droop coefficient in the droop coefficient of the network control parameters. The voltage coefficient droop coefficient is one of the droop coefficients in the network control parameters. For the first i Reference value for the frequency output of the grid-type wind turbine. For the first i Reference value for reactive power of grid-connected wind turbine generators. For the first i Output frequency of grid-type wind turbine generators For the first i The reactive power output of the grid-type wind turbine generator set; The constraints for the network control parameters are as follows: In the formula, For the first i The maximum virtual damping value of a grid-type wind turbine. For the first i The maximum virtual inertia of a grid-type wind turbine. For the first i The maximum voltage coefficient of the grid-type wind turbine. For the first i Minimum virtual damping of a grid-type wind turbine. For the first i Minimum virtual inertia of grid-type wind turbines For the first i Minimum voltage coefficient of grid-type wind turbine generator. The number of grid-connected wind turbine units.

7. The transient voltage control method for grid-type wind farms based on adaptive droop as described in claim 6, characterized in that, Before the step of adjusting the grid control parameters of the grid-type wind turbine based on the grid control parameter reference values, the frequency reference values, and the reactive power reference values ​​using the droop control optimization model, and outputting the grid control parameter reference values ​​to the grid-type wind turbine to ensure that the output voltage and output frequency of the grid-type wind turbine are within a preset voltage range and a preset frequency range, wherein the grid control parameter reference values ​​include virtual damping reference values, virtual inertia reference values, and voltage coefficient reference values, the method further includes: Based on the line parameters and the generator parameters, a network-type transient coupling model is determined. The network-type transient coupling model is as follows: In the formula, For the first i Output frequency of the grid-type wind turbine. For the first i Reference value for the output frequency of a grid-type wind turbine. For the first i Converter voltage of grid-connected wind turbine units For the first i The reactive power output of the grid-connected wind turbine. For the first i Reference value for reactive power output of grid-connected wind turbine generators. For the first i Virtual damping of grid-type wind turbines. For the first i Virtual inertia of grid-connected wind turbines. For the first i Voltage coefficient of grid-type wind turbine generators; The preset droop control optimization model is determined based on the aforementioned network-type transient coupling model.

8. A transient voltage control device for a grid-type wind farm based on adaptive droop, characterized in that, The device includes: The instruction module is used to determine the power control instruction that minimizes the node voltage fluctuation of the grid-connected wind farm when a transient voltage is detected in the grid-connected wind turbine. The control module is used to output the power control command to the grid-type wind turbine; The monitoring module is used to acquire the status parameters of the grid-connected wind turbine after it responds to the power control command; The control module is also used to determine the deviation between the state parameters and the state reference values, and to adjust the grid control parameters of the grid-type wind turbine through the droop coefficient of the grid control parameters of the grid-type wind turbine and the deviation, so that the output voltage of the grid-type wind turbine is within a preset voltage range and the output frequency is within a preset frequency range.

9. A transient voltage control device for a grid-type wind farm based on adaptive droop, characterized in that, The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the adaptive droop-based transient voltage control method for grid-type wind farms as described in any one of claims 1 to 7.

10. A storage medium, characterized in that, The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, it implements the steps of the transient voltage control method for grid-type wind farms based on adaptive droop, as described in any one of claims 1 to 7.

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