A network-constructing type wind farm transient voltage control method and device based on adaptive droop, equipment and storage medium

Abstract

The application discloses a kind of network type wind farm transient voltage control method based on adaptive droop, device and storage medium, relating to wind power generation technical field, the disclosed method includes: when detecting that network type wind turbine generator exists transient voltage, determine the power control instruction to make the node voltage fluctuation of network type wind farm reach minimum value;Power control instruction is output to network type wind turbine;Get the state parameter after network type wind turbine generator responds power control instruction;Determine the deviation between state parameter and state reference value, and adjust the network control parameter of network type wind turbine generator through the network control parameter droop coefficient of network type wind turbine generator and deviation, to make the output voltage of network type wind turbine generator be in preset voltage range and output frequency be in preset frequency range, so that network type wind farm is subjected to transient voltage disturbance period, effectively suppress voltage oscillation and frequency oscillation, improve the stability of network type wind farm.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power generation technology, and particularly relates to a grid-connected wind farm transient voltage control method based on adaptive droop, a device, equipment and a storage medium. BACKGROUND

[0002] With the continuous increase of new energy penetration, the power grid presents the characteristics of low short-circuit ratio and weak inertia, and the risk of safe operation of the system increases. Compared with grid-connected wind turbine generators, grid-connected wind turbine generators present voltage source control and self-synchronous grid characteristics, can directly control the amplitude and phase of the output voltage, and have the function of providing inertia, voltage and damping support to the power grid.

[0003] However, when the grid-connected wind farm composed of grid-connected wind turbine generators is subjected to transient voltage disturbance, on the one hand, it will cause the active power fluctuation of the grid-connected wind turbine generators, causing frequency fluctuation, and on the other hand, it will affect the reactive power balance of the grid-connected wind turbine generators, causing voltage amplitude fluctuation. Therefore, when the grid-connected wind farm is subjected to transient voltage disturbance, the grid-connected wind turbine generators will have voltage oscillation and frequency oscillation problems, thereby reducing the stability of the grid-connected wind farm.

[0004] The above content is only used to assist in understanding the technical solutions of the present application, and does not represent the acknowledgement of the above content as prior art. SUMMARY

[0005] The main purpose of the present application is to provide a grid-connected wind farm transient voltage control method based on adaptive droop, a device, equipment and a storage medium, which aims to solve the technical problem that the grid-connected wind farm in the prior art will cause the grid-connected wind turbine generators to have voltage oscillation and frequency oscillation problems when subjected to transient voltage disturbance, thereby reducing the stability of the grid-connected wind farm.

[0006] To achieve the above purpose, the present application provides a grid-connected wind farm transient voltage control method based on adaptive droop, which comprises:

[0007] When it is detected that the grid-connected wind turbine generators have transient voltage, determine the power control instruction that minimizes the node voltage fluctuation of the grid-connected wind farm;

[0008] Output the power control instruction to the grid-connected wind turbine generator;

[0009] Obtain the state parameters of the grid-connected wind turbine generators after responding to the power control instruction;

[0010] determine a deviation between the state parameter and a state reference value, and adjust a grid-connected control parameter of the grid-connected wind turbine through a droop coefficient of the grid-connected control parameter of the grid-connected wind turbine and the deviation, so that an output voltage of the grid-connected wind turbine is in a preset voltage range and an output frequency is in a preset frequency range.

[0011] In an embodiment, the step of determining the power control instruction that minimizes the node voltage fluctuation of the grid-connected wind farm when detecting that the grid-connected wind turbine has transient voltage, comprises:

[0012] When detecting that the grid-connected wind turbine has transient voltage, obtaining a transient voltage sensitivity equation of the grid-connected wind farm, the transient voltage sensitivity equation representing a corresponding relationship between an output power of the grid-connected wind turbine and a node voltage fluctuation of the grid-connected wind farm;

[0013] determining, through the transient voltage sensitivity equation, an active power reference value and a reactive power reference value that minimize the node voltage fluctuation;

[0014] generating a power control instruction according to the active power reference value and the reactive power reference value.

[0015] In an embodiment, before the step of obtaining the transient voltage sensitivity equation of the grid-connected wind farm when detecting that the grid-connected wind turbine has transient voltage, further comprising:

[0016] obtaining a line parameter of the grid-connected wind farm and a unit parameter of the grid-connected wind turbine, the unit parameter at least including active power, reactive power and output voltage;

[0017] determining a grid-connected wind farm transient voltage model according to the line parameter, the active power, the reactive power and the output voltage, the grid-connected wind farm transient voltage model being:

[0018]

[0019] wherein, is an output voltage increment of the first i grid-connected wind turbine, is an active power increment output by the first i grid-connected wind turbine, is a reactive power increment output by the first i grid-connected wind turbine;

[0020] the equation corresponding to the grid-connected wind farm transient voltage model is taken as a transient voltage sensitivity equation.

[0021] In an embodiment, the step of determining the active power reference value and the reactive power reference value that minimize the node voltage fluctuation through the transient voltage sensitivity equation comprises:

[0022] obtaining a target function, the target function being:

[0023]

[0024] wherein, is the minimum value of the node voltage fluctuation, is the controller step length, is the number of grid-connected wind turbine generators, is the transient voltage optimization parameter, is the output voltage of the kth step, i is the output voltage of the kth step, is the output voltage of the kth step, i is the voltage reference value of the kth step;

[0025] determining the active power reference value and the reactive power reference value that minimize the node voltage fluctuation through the target function, the transient voltage sensitivity equation, the active power and the reactive power.

[0026] In an embodiment, the step of determining the active power reference value and the reactive power reference value that minimize the node voltage fluctuation through the target function, the transient voltage sensitivity equation, the active power and the reactive power comprises:

[0027] obtaining a constraint condition of the output power reference value, the constraint condition of the output power reference value being:

[0028]

[0029] wherein, is the active power reference value of the kth step, i is the active power reference value of the kth step, is the reactive power reference value of the kth step, i is the reactive power reference value of the kth step, is the maximum active power output by the kth step, i is the maximum active power output by the kth step, is the maximum reactive power output by the kth step, i is the maximum reactive power output by the kth step, is the number of grid-connected wind turbine generators;

[0030] 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.

[0031] 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:

[0032] 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.

[0033] The droop control optimization model is as follows:

[0034]

[0035] 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 the number of grid-connected wind turbine generators, i reactive power output by the grid-connected wind turbine generator;

[0036] the grid-connected control parameter constraint condition is:

[0037]

[0038] wherein, the number of grid-connected wind turbine generators, i maximum virtual damping of the grid-connected wind turbine generator, the number of grid-connected wind turbine generators, i maximum virtual inertia of the grid-connected wind turbine generator, the number of grid-connected wind turbine generators, i maximum voltage coefficient of the grid-connected wind turbine generator, the number of grid-connected wind turbine generators, i minimum virtual damping of the grid-connected wind turbine generator, the number of grid-connected wind turbine generators, i minimum virtual inertia of the grid-connected wind turbine generator, the number of grid-connected wind turbine generators, i minimum voltage coefficient of the grid-connected wind turbine generator, the number of grid-connected wind turbine generators.

[0039] In an embodiment, before the step of adjusting the grid-connected control parameter of the grid-connected wind turbine generator based on the grid-connected control parameter reference value, the frequency reference value and the reactive power reference value by the droop control optimization model, and outputting the grid-connected control parameter reference value to the grid-connected wind turbine generator, so that the output voltage of the grid-connected wind turbine generator is in a preset voltage range and the output frequency is in a preset frequency range, the grid-connected control parameter reference value includes virtual damping reference value, virtual inertia reference value and voltage coefficient reference value, the method further comprises:

[0040] determining a grid-connected transient coupling model according to the line parameters and the unit parameters, the grid-connected transient coupling model being:

[0041]

[0042] wherein, the number of grid-connected wind turbine generators, i output frequency of the grid-connected wind turbine generator, the number of grid-connected wind turbine generators, i output frequency reference value of the grid-connected wind turbine generator, the number of grid-connected wind turbine generators, i converter voltage of the grid-connected wind turbine generator, the number of grid-connected wind turbine generators, i reactive power output by the grid-connected wind turbine generator, the number of grid-connected wind turbine generators, i reactive power reference value output by the grid-connected wind turbine generator, For the first i Virtual damping of grid-connected wind turbine, For the first i Virtual inertia of grid-connected wind turbine, For the first i Voltage coefficient of grid-connected wind turbine.

[0043] Determine a preset droop control optimization model according to the grid-connected transient coupling model.

[0044] In addition, to achieve the above-mentioned purpose, the application also proposes a grid-connected wind farm transient voltage control device based on adaptive droop, which comprises:

[0045] An instruction module is configured to determine a power control instruction for minimizing the node voltage fluctuation of the grid-connected wind farm when detecting that the grid-connected wind turbine has transient voltage;

[0046] A control module is configured to output the power control instruction to the grid-connected wind turbine;

[0047] A monitoring module is configured to obtain state parameters of the grid-connected wind turbine after responding to the power control instruction;

[0048] The control module is further configured to determine the deviation between the state parameters and the state reference value, and adjust the grid connection control parameters of the grid-connected wind turbine through the grid connection control parameter droop coefficient of the grid-connected wind turbine and the deviation, so that the output voltage of the grid-connected wind turbine is in a preset voltage range and the output frequency is in a preset frequency range.

[0049] In addition, to achieve the above-mentioned purpose, the application also proposes a grid-connected wind farm transient voltage control device based on adaptive droop, which comprises a memory, a processor and a computer program stored on the memory and executable on the processor, and the computer program is configured to implement the steps of the grid-connected wind farm transient voltage control method based on adaptive droop as described above.

[0050] In addition, to achieve the above-mentioned purpose, the application also proposes a storage medium, which is a computer readable storage medium, and the storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the grid-connected wind farm transient voltage control method based on adaptive droop as described above.

[0051] The one or more technical solutions proposed in the application have at least the following technical effects:

[0052] The application determines the power control instruction that minimizes the node voltage fluctuation of the grid-connected wind farm when detecting that the grid-connected wind turbine has transient voltage, outputs the power control instruction to the grid-connected wind turbine, acquires the state parameter of the grid-connected wind turbine after responding to the power control instruction, determines the deviation between the state parameter and the state reference value, and adjusts the grid connection control parameter of the grid-connected wind turbine through the grid connection control parameter droop coefficient and the deviation, so that the output voltage of the grid-connected wind turbine is within the preset voltage range and the output frequency is within the preset frequency range. Since the application outputs the power control instruction that minimizes the node voltage fluctuation of the grid-connected wind farm to the grid-connected wind turbine to reduce the transient voltage of the grid-connected wind turbine, and adjusts the grid connection control parameter of the grid-connected wind turbine through the grid connection control parameter droop coefficient and the deviation, so that the output voltage of the grid-connected wind turbine is within the preset voltage range and the output frequency is within the preset frequency range, therefore, the application can effectively suppress voltage oscillation and frequency oscillation while reducing the transient voltage of the grid-connected wind turbine during the transient voltage disturbance of the grid-connected wind farm, and improves the stability of the grid-connected wind farm. BRIEF DESCRIPTION OF DRAWINGS

[0053] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the application.

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0055] Figure 1 Flowchart of the first embodiment of the grid-connected wind farm transient voltage control method based on adaptive droop of the present application;

[0056] Figure 2 Flowchart of the second embodiment of the grid-connected wind farm transient voltage control method based on adaptive droop of the present application;

[0057] Figure 3 Flowchart of the third embodiment of the grid-connected wind farm transient voltage control method based on adaptive droop of the present application;

[0058] Figure 4 Module structure diagram of the grid-connected wind farm transient voltage control device based on adaptive droop of the present application;

[0059] Figure 5A structural schematic diagram of a transient voltage control device for a grid-connected wind farm based on adaptive droop is provided.

[0060] The object, functional characteristics and advantages of the present application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0061] It should be understood that the specific embodiments described herein are merely intended to explain the technical solutions of the present application, and are not intended to limit the present application.

[0062] In order to better understand the technical solutions of the present application, the specific embodiments will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0063] The main solution of the embodiments of the present application is: when it is detected that the grid-connected wind turbine exists transient voltage, determining the power control instruction that makes the node voltage fluctuation of the grid-connected wind farm reach the minimum value; outputting the power control instruction to the grid-connected wind turbine; obtaining the state parameter of the grid-connected wind turbine after responding to the power control instruction; determining the deviation between the state parameter and the state reference value, and adjusting the grid-connected control parameter of the grid-connected wind turbine through the grid-connected control parameter droop coefficient and the deviation of the grid-connected wind turbine, so that the output voltage of the grid-connected wind turbine is in the preset voltage range and the output frequency is in the preset frequency range.

[0064] Due to the prior art, when the grid-connected wind farm is subjected to transient voltage disturbance, the grid-connected wind turbine will have voltage oscillation and frequency oscillation problems, which will further reduce the stability of the grid-connected wind farm.

[0065] The present application provides a solution, by outputting the power control instruction that makes the node voltage fluctuation of the grid-connected wind farm reach the minimum value to the grid-connected wind turbine, to reduce the transient voltage of the grid-connected wind turbine, and by adjusting the grid-connected control parameter of the grid-connected wind turbine through the grid-connected control parameter droop coefficient and the deviation, so that the output voltage of the grid-connected wind turbine is in the preset voltage range and the output frequency is in the preset frequency range. Therefore, the present application can reduce the transient voltage of the grid-connected wind turbine while effectively suppressing voltage oscillation and frequency oscillation during transient voltage disturbance of the grid-connected wind farm, thereby improving the stability of the grid-connected wind farm.

[0066] It should be noted that the execution subject of the present embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, a grid-connected wind farm transient voltage control device based on adaptive droop, etc. In the following, the present embodiment and each of the following embodiments will be described taking the grid-connected wind farm transient voltage control device based on adaptive droop (referred to as control device) as an example.

[0067] Based on this, the application provides a transient voltage control method for a grid-connected wind farm based on adaptive droop. Figure 1 , Figure 1 FIG. 1 is a flowchart of a transient voltage control method for a grid-connected wind farm based on adaptive droop according to an embodiment of the application.

[0068] In this embodiment, the transient voltage control method for a grid-connected wind farm based on adaptive droop includes steps S10-S40:

[0069] Step S10: When it is detected that the grid-connected wind turbine generator set has transient voltage, determine the power control instruction that minimizes the node voltage fluctuation of the grid-connected wind farm.

[0070] It should be noted that the transient voltage can be the voltage value when the amplitude and frequency of the output voltage of the grid-connected wind turbine generator set change temporarily after being disturbed (such as short-circuit fault, lightning strike, load mutation, etc.).

[0071] It can be understood that the node voltage of the grid-connected wind farm can be the change of the voltage amplitude and phase of each key connection point (such as the output end of the grid-connected wind turbine generator set, the connection point of the collection line, the high-voltage side of the step-up transformer, etc.) equivalent to the steady-state value. When the grid-connected wind farm is disturbed, the fluctuation of the transient voltage will directly affect the stability of the node voltage. For example, when the power grid has a short-circuit fault, the node voltage at the outlet of the grid-connected wind farm will rapidly decrease, and then gradually rise in the system recovery process. In this transient process, the amplitude and phase of the node voltage will change, which may cause the output power fluctuation of each grid-connected wind turbine generator set in the grid-connected wind farm, the increase of reactive power demand, etc.

[0072] Further, the fluctuation of the node voltage will further affect the power distribution and equipment operating state inside the grid-connected wind farm, thereby producing a feedback effect on the recovery process of the transient voltage. If the node voltage fluctuation is too large, it may cause the oscillation of the transient voltage to intensify and prolong the recovery time of the system.

[0073] In a specific implementation, the control device can monitor the node voltage fluctuation of the grid-connected wind farm in real time, i.e., the amplitude fluctuation and frequency fluctuation of the output voltage of each grid-connected wind turbine generator set. When the node voltage fluctuation exceeds the set fluctuation range (i.e., the amplitude fluctuation of any grid-connected wind turbine generator set exceeds the pre-set amplitude fluctuation range or the frequency fluctuation exceeds the pre-set frequency fluctuation range), it is determined that the grid-connected wind turbine generator set has transient voltage. When the control device detects that the grid-connected wind turbine generator set has transient voltage, it can determine the power reference value that minimizes the node voltage fluctuation of the grid-connected wind farm according to the locally stored historical power data and node voltage data, and generate the power control instruction that makes the grid-connected wind turbine generator set output the power reference value.

[0074] In step S20, the power control instruction is output to the grid-connected wind turbine.

[0075] In a specific implementation, the control device can output the power control instruction to the grid-connected wind turbine in a transient voltage state, and the grid-connected wind turbine adjusts its output power to the power reference value corresponding to the power control instruction in response to the power control instruction, so that the corresponding node voltage fluctuation is minimized, thereby reducing the transient voltage, improving the stability of the grid-connected wind farm in the transient process, and reducing the risk of equipment failure and protection device misoperation.

[0076] In step S30, the state parameter of the grid-connected wind turbine after responding to the power control instruction is obtained.

[0077] It should be noted that the state parameter can be a parameter reflecting the real-time operating state of the grid-connected wind turbine, such as output frequency, active power, and reactive power.

[0078] In a specific implementation, the control device obtains the state parameter of the grid-connected wind turbine in real time during the process of the grid-connected wind turbine responding to the power control instruction, so as to monitor the real-time operating state of the grid-connected wind turbine after responding to the power control instruction.

[0079] In step S40, the deviation between the state parameter and the state reference value is determined, and the grid-connected control parameter of the grid-connected wind turbine is adjusted through the grid-connected control parameter droop coefficient of the grid-connected wind turbine and the deviation, so that the output voltage of the grid-connected wind turbine is in a preset voltage range and the output frequency is in a preset frequency range.

[0080] It should be noted that the state reference value can be a state parameter of the grid-connected wind turbine in an ideal state, such as a frequency reference value and a reactive power reference value.

[0081] It can be understood that the preset voltage range can be a pre-set range, and when the output voltage is in the preset voltage range, it indicates that the grid-connected wind turbine does not exist voltage oscillation. The preset frequency range can be a pre-set range, and when the output frequency is in the preset frequency range, it indicates that the grid-connected wind turbine does not exist frequency oscillation.

[0082] It should be noted that the grid-connected control parameter droop coefficient can be a parameter for controlling and adjusting the output power and voltage of the grid-connected wind turbine.

[0083] It can be understood that the grid-connected control parameter droop coefficient can be a coefficient for adjusting the grid-connected control parameter, which can represent the sensitivity of the grid-connected control parameter to system deviation (such as frequency deviation and reactive power deviation).

[0084] In a specific implementation, the control device can calculate the deviation between the state parameter and the corresponding state reference value in real time, and dynamically adjust the grid-forming control parameter by using the deviation and the grid-forming control parameter droop coefficient. That is, when the deviation exceeds the set threshold, the grid-forming control parameter is adjusted by the grid-forming control parameter droop coefficient, so that the grid-forming wind turbine generator can better adapt to the dynamic changes of the system, and the output voltage of the grid-forming wind turbine generator is in the preset voltage range and the output frequency is in the preset frequency range, thereby suppressing voltage oscillation and frequency oscillation.

[0085] In this embodiment, when it is detected that the grid-forming wind turbine generator has transient voltage, the power control instruction that minimizes the node voltage fluctuation of the grid-forming wind farm is determined; the power control instruction is output to the grid-forming wind turbine; the state parameter of the grid-forming wind turbine after responding to the power control instruction is obtained; the deviation between the state parameter and the state reference value is determined, and the grid-forming control parameter of the grid-forming wind turbine is adjusted by the grid-forming control parameter droop coefficient and the deviation, so that the output voltage of the grid-forming wind turbine is in the preset voltage range and the output frequency is in the preset frequency range. Since this embodiment outputs the power control instruction that minimizes the node voltage fluctuation of the grid-forming wind farm to the grid-forming wind turbine to reduce the transient voltage of the grid-forming wind turbine, and adjusts the grid-forming control parameter of the grid-forming wind turbine by the grid-forming control parameter droop coefficient and the deviation, so that the output voltage of the grid-forming wind turbine is in the preset voltage range and the output frequency is in the preset frequency range, therefore, this embodiment can reduce the transient voltage of the grid-forming wind turbine while effectively suppressing voltage oscillation and frequency oscillation during the transient voltage disturbance of the grid-forming wind farm, and improving the stability of the grid-forming wind farm.

[0086] Based on the first embodiment of the present application, the second embodiment of the present application is proposed. In the second embodiment of the present application, the same or similar contents as the above first embodiment can be referred to the above introduction, and will not be described in detail. On this basis, please refer to Figure 2 , Figure 2 The flowchart of the second embodiment of the present application based on the transient voltage control method of the grid-forming wind farm based on adaptive droop is shown.

[0087] In this embodiment, step S10 includes steps S101-S103:

[0088] Step S101, when it is detected that the grid-forming wind turbine generator has transient voltage, the transient voltage sensitivity equation of the grid-forming wind farm is obtained.

[0089] The transient voltage sensitivity equation represents the corresponding relationship between the output power of the grid-forming wind turbine and the node voltage fluctuation of the grid-forming wind farm.

[0090] In a specific implementation, historical output power and historical node voltage of different grid-connected wind turbine generators can be collected in advance, the influence of output power of different grid-connected wind turbine generators on node voltage fluctuation is analyzed, and a transient voltage sensitivity equation representing the corresponding relationship between output power of grid-connected wind turbine generators and node voltage fluctuation of grid-connected wind power plants is constructed.

[0091] In a feasible implementation, step S101 further includes steps S01-S03 before step S101.

[0092] In step S01, line parameters of the grid-connected wind power plant and unit parameters of the grid-connected wind turbine generators are obtained, wherein the unit parameters at least include active power, reactive power and output voltage.

[0093] It should be noted that the line parameters can be electrical characteristic parameters of lines of the grid-connected wind power plant for connecting the grid-connected wind turbine generators and transmitting electrical energy to the power grid, including line resistance and line inductance.

[0094] It can be understood that the unit parameters can be various electrical performance parameters exhibited by a single grid-connected wind turbine generator during operation, including active power, reactive power, output voltage and output frequency.

[0095] In step S02, a transient voltage model of the grid-connected wind power plant is determined according to the line parameters, the active power, the reactive power and the output voltage.

[0096] The transient voltage model of the grid-connected wind power plant is as follows:

[0097]

[0098] In the formula, is an output voltage increment of the i th grid-connected wind turbine generator, i is an active power increment output by the i th grid-connected wind turbine generator, is a reactive power increment output by the i th grid-connected wind turbine generator. i i

[0099] In step S03, an equation corresponding to the transient voltage model of the grid-connected wind power plant is taken as a transient voltage sensitivity equation.

[0100] In a specific implementation, according to the line parameters of the grid-connected wind power plant and the unit parameters of the grid-connected wind turbine generators, a sensitivity analysis method is used to determine the influence of output power variation of different grid-connected wind turbine generators on node voltage fluctuation of the grid-connected wind power plant, and the above-mentioned transient voltage model of the grid-connected wind power plant is constructed. An equation corresponding to the transient voltage model of the grid-connected wind power plant can be taken as a transient voltage sensitivity equation. ​​​

[0101] In step S102, the active power reference value and the reactive power reference value that minimize the node voltage fluctuation are determined by using the transient voltage sensitivity equation.

[0102] In a specific implementation, the control device uses the transient voltage sensitivity equation to determine the active power reference value and the reactive power reference value that minimize the node voltage fluctuation, with the minimization of the node voltage fluctuation of the grid-connected wind farm as the control target.

[0103] In a feasible implementation, step S102 includes steps S1021-S1022.

[0104] In step S1021, the objective function is obtained.

[0105] The objective function is as follows:

[0106]

[0107] In the formula, is the minimum value of the node voltage fluctuation, is the controller step length, is the number of grid-connected wind turbines, is the transient voltage optimization parameter, is the output voltage of the kth step, i is the output voltage of the kth step, is the output voltage of the kth step, i is the voltage reference value of the kth step.

[0108] It should be noted that the voltage reference value can be the optimal voltage output by the grid-connected wind turbine in an ideal state.

[0109] In step S1022, the active power reference value and the reactive power reference value that minimize the node voltage fluctuation are determined by using the objective function, the transient voltage sensitivity equation, the active power, and the reactive power.

[0110] In a specific implementation, the control device uses the objective function and the transient voltage sensitivity equation to set different active power and reactive power, with the minimization of the node voltage fluctuation as the target, and determines the active power and the reactive power that can minimize the node voltage fluctuation, and takes the determined active power as the active power reference value and the determined reactive power as the reactive power reference value.

[0111] In a feasible implementation, step S1022 can include steps S10221-S10222.

[0112] In step S10221, the constraint condition of the output power reference value is obtained.

[0113] The constraint condition of the output power reference value is:

[0114]

[0115] In the formula, The active power reference value of the first grid-connected wind turbine, i The active power reference value of the first grid-connected wind turbine, The reactive power reference value of the first grid-connected wind turbine, i The active power reference value of the first grid-connected wind turbine, The reactive power reference value of the first grid-connected wind turbine, i The active power reference value of the first grid-connected wind turbine, The reactive power reference value of the first grid-connected wind turbine. i The reactive power reference value of the first grid-connected wind turbine.

[0116] In step S10222, the active power and the reactive power are adjusted based on the objective function, the transient voltage sensitivity equation and the constraint condition of the output power reference value, so as to determine the active power reference value and the reactive power reference value which make the node voltage fluctuation minimum.

[0117] In the specific implementation, the control device uses the objective function to make the node voltage fluctuation minimum as the target, combines the transient voltage sensitivity equation, and uses an optimization algorithm such as gradient descent method, particle swarm optimization, etc. to continuously set different active power and reactive power within the constraint condition of the output power reference value to perform iterative calculation, so as to determine the active power reference value and the reactive power reference value which make the objective function minimum, that is, the active power reference value and the reactive power reference value which make the node voltage fluctuation minimum.

[0118] In step S103, a power control instruction is generated according to the active power reference value and the reactive power reference value.

[0119] In the specific implementation, the control device can generate a corresponding power control instruction according to the active power reference value and the reactive power reference value, so as to control the active power output by the grid-connected wind turbine to be the active power reference value and the reactive power to be the reactive power reference value, thereby making the node voltage fluctuation minimum.

[0120] 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.

[0121] 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.

[0122] 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:

[0123] 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.

[0124] The droop control optimization model is as follows:

[0125]

[0126] 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. a virtual inertia droop coefficient in the grid-forming control parameter droop coefficient, a voltage coefficient droop coefficient in the grid-forming control parameter droop coefficient, a first i frequency reference value of the grid-forming wind turbine, a first i reactive power reference value of the grid-forming wind turbine, a first i output frequency of the grid-forming wind turbine, a first i reactive power output of the grid-forming wind turbine.

[0127] The grid-forming control parameter constraint condition is:

[0128]

[0129] wherein, a first i maximum virtual damping value of the grid-forming wind turbine, a first i maximum virtual inertia value of the grid-forming wind turbine, a first i maximum voltage coefficient value of the grid-forming wind turbine, a first i minimum virtual damping value of the grid-forming wind turbine, a first i minimum virtual inertia value of the grid-forming wind turbine, a first i minimum voltage coefficient value of the grid-forming wind turbine, a first

[0130] It should be noted that the frequency reference value can be an optimal frequency output by the grid-forming wind turbine in an ideal state.

[0131] It can be understood that the grid-forming control parameters include virtual damping, virtual inertia and voltage coefficient. The virtual damping can be a damping characteristic of a synchronous generator, used to suppress oscillation of the system; the virtual inertia can be an inertia of a synchronous generator, affecting the response speed of the wind turbine to frequency change; the voltage coefficient can be a droop characteristic between reactive power and voltage, affecting the regulation speed and accuracy of the voltage. The grid-forming control parameter droop coefficient can include a virtual damping droop coefficient for adjusting the virtual damping, a virtual inertia droop coefficient for adjusting the virtual inertia, and a voltage coefficient droop coefficient for adjusting the voltage coefficient.

[0132] It should be noted that the control device can perform adaptive droop control on the above-mentioned droop control optimization model to optimize the network configuration control parameters, and achieve voltage oscillation suppression and frequency oscillation suppression of the wind turbine.

[0133] Specifically, the control device can dynamically adjust the virtual damping based on the deviation between the output frequency of the network configuration type wind turbine and the frequency reference value, using the virtual damping droop coefficient, to obtain a virtual damping reference value, and output the virtual damping reference value to the network configuration type wind turbine. After receiving the virtual damping reference value, the network configuration type wind turbine adjusts 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 the ability to suppress frequency oscillations.

[0134] The control device can dynamically adjust the virtual inertia based on the deviation between the output frequency of the network configuration type wind turbine and the frequency reference value, using the virtual inertia droop coefficient, to obtain a virtual inertia reference value, and output the virtual inertia reference value to the network configuration type wind turbine. After receiving the virtual inertia reference value, the network configuration type wind turbine adjusts 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 to frequency changes, slowing down the rate of frequency changes, keeping the output frequency within a preset frequency range, and suppressing frequency oscillations.

[0135] The control device can dynamically adjust the voltage coefficient based on the deviation between the reactive power output of the network configuration type wind turbine and the reactive power reference value, using the voltage coefficient droop coefficient, to obtain a voltage coefficient reference value, and output the voltage coefficient reference value to the network configuration type wind turbine. After receiving the voltage coefficient reference value, the network configuration type wind turbine adjusts its voltage coefficient, so that the adjusted voltage coefficient is 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 network configuration type wind turbine changes the reactive power output according to the voltage coefficient droop coefficient to stabilize the output voltage, so that the output voltage is within a preset voltage range, and the voltage oscillation is suppressed.

[0136] In one possible implementation, before step S401, steps S4011-S4012 are further included:

[0137] In step S4011, the network configuration type transient coupling model is determined according to the line parameters and the unit parameters.

[0138] The network configuration type transient coupling model is:

[0139]

[0140] In the formula, for the first i an output frequency of the grid-connected wind turbine, for the first i an output frequency reference value of the grid-connected wind turbine, for the first i a converter voltage of the grid-connected wind turbine, for the first i a reactive power output of the grid-connected wind turbine, for the first i a reactive power reference value output of the grid-connected wind turbine, for the first i a virtual damping of the grid-connected wind turbine, for the first i a virtual inertia of the grid-connected wind turbine, for the first i a voltage coefficient of the grid-connected wind turbine.

[0141] In step S4012, a droop control optimization model is determined according to the grid-connected transient coupling model.

[0142] In a specific implementation, the grid-connected transient coupling model between the grid-connected control parameters and the output frequency and the output voltage of the different grid-connected wind turbines can be established by combining the virtual synchronous control equation and the transient voltage model based on the virtual synchronous control method, and the above-mentioned droop control optimization model can be derived through the grid-connected transient coupling model.

[0143] The grid-connected transient coupling model is determined by the line parameters and the unit parameters, the preset droop control optimization model is determined according to the grid-connected transient coupling model, the grid-connected control parameters of the grid-connected wind turbine are adjusted based on the grid-connected control parameter droop coefficient, the frequency reference value and the reactive power reference value of the grid-connected wind turbine through the droop control optimization model, the grid-connected control parameter reference value is output to the grid-connected wind turbine within the grid-connected control parameter constraint condition, so that the output voltage of the grid-connected wind turbine is in the preset voltage range and the output frequency is in the preset frequency range, the grid-connected control parameter reference value includes the virtual damping reference value, the virtual inertia reference value and the voltage coefficient reference value, the adaptive droop control optimization of the grid-connected control parameter is realized, the voltage frequency oscillation suppression ability of the grid-connected wind turbine is further improved, and the transient voltage support ability of the grid-connected wind farm is effectively enhanced.

[0144] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the adaptive droop based grid-connected wind farm transient voltage control method of the present application. More forms of simple transformation based on this technical concept are within the protection scope of the present application.

[0145] The application also provides a networked wind farm transient voltage control device based on adaptive droop. Figure 4 , Figure 4 FIG. 1 is a schematic diagram of a module structure of a networked wind farm transient voltage control device based on adaptive droop.

[0146] The networked wind farm transient voltage control device based on adaptive droop comprises:

[0147] An instruction module 10 is configured to determine a power control instruction for minimizing a node voltage fluctuation of a networked wind farm when detecting that a networked wind turbine generator exists transient voltage;

[0148] A control module 20 is configured to output the power control instruction to the networked wind turbine generator.

[0149] A monitoring module 30 is configured to acquire a state parameter of the networked wind turbine generator after the networked wind turbine generator responds to the power control instruction.

[0150] The control module 20 is further configured to determine a deviation between the state parameter and a state reference value, and adjust a network control parameter of the networked wind turbine generator through a network control parameter droop coefficient of the networked wind turbine generator and the deviation, so that an output voltage of the networked wind turbine generator is within a preset voltage range and an output frequency of the networked wind turbine generator is within a preset frequency range.

[0151] The networked wind farm transient voltage control device based on adaptive droop provided by the application adopts the networked wind farm transient voltage control method based on adaptive droop in the above embodiment, and can solve the technical problem that the networked wind farm in the prior art will cause voltage oscillation and frequency oscillation of the networked wind turbine generator when subjected to transient voltage disturbance, and further cause the stability of the networked wind farm to decrease. Compared with the prior art, the networked wind farm transient voltage control device based on adaptive droop provided by the application has the same beneficial effects as the networked wind farm transient voltage control method based on adaptive droop provided by the above embodiment, and other technical features in the networked wind farm transient voltage control device based on adaptive droop are the same as the features disclosed in the above embodiment method, which will not be described here.

[0152] The application provides a network-constructed wind farm transient voltage control device based on adaptive droop, which comprises at least one processor and a memory in communication connection with the at least one processor; 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 perform the network-constructed wind farm transient voltage control method based on adaptive droop in the above embodiment one.

[0153] Reference will be made to Figure 5 , Figure 5 FIG. 1 is a structural schematic diagram of a network-constructed wind farm transient voltage control device based on adaptive droop according to an embodiment of the application. The network-constructed wind farm transient voltage control device based on adaptive droop in the embodiment of the application can include, but is not limited to, mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (Personal Digital Assistant), PADs (Portable Application Description), PMPs (Portable Media Player), vehicle-mounted terminals (for example, vehicle-mounted navigation terminals), and the like, and fixed terminals such as digital TVs, desktop computers, and the like. Figure 5 The network-constructed wind farm transient voltage control device based on adaptive droop shown is only an example, and should not bring any limitation to the functions and use range of the embodiments of the application.

[0154] As Figure 5As shown, the adaptive droop based grid integrated wind farm transient voltage control device can include a processing device 1001 (e.g., a central processing unit, a graphics processing unit, etc.) that can perform various appropriate actions and processes according to programs stored in a read only memory (ROM) 1002 or loaded from a storage device 1003 into a random access memory (RAM) 1004. In the RAM 1004, various programs and data required for operation of the adaptive droop based grid integrated wind farm transient voltage control device are also stored. The processing device 1001, the ROM 1002, and the RAM 1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; the storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the adaptive droop based grid integrated wind farm transient voltage control device to communicate wirelessly or wired with other devices to exchange data. Although the adaptive droop based grid integrated wind farm transient voltage control device with various systems is shown in the figure, it should be understood that all the shown systems are not required to be implemented or possessed. More or less systems can be alternatively implemented or possessed.

[0155] In particular, the processes described above with reference to the flowcharts can be implemented as a computer software program according to embodiments of the present disclosure. For example, embodiments of the present disclosure include a computer program product comprising a computer program carrying out the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network through a communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the methods of embodiments of the present disclosure are performed.

[0156] The adaptive droop-based grid-connected wind farm transient voltage control device provided in the application adopts the adaptive droop-based grid-connected wind farm transient voltage control method in the above embodiment, and can solve the technical problem that the grid-connected wind farm in the prior art will cause voltage oscillation and frequency oscillation of the grid-connected wind turbine when subjected to transient voltage disturbance, thereby reducing the stability of the grid-connected wind farm. Compared with the prior art, the adaptive droop-based grid-connected wind farm transient voltage control device provided in the application has the same beneficial effects as the adaptive droop-based grid-connected wind farm transient voltage control method provided in the above embodiment, and other technical features in the adaptive droop-based grid-connected wind farm transient voltage control device are the same as the features disclosed in the previous embodiment method, which will not be repeated here.

[0157] It should be understood that various parts of the present application can be realized by 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 one or more embodiments or examples in a suitable manner.

[0158] The above is merely specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0159] The present application provides a computer readable storage medium having computer readable program instructions (i.e. computer program) stored thereon, the computer readable program instructions being used to execute the adaptive droop-based grid-connected wind farm transient voltage control method in the above embodiment.

[0160] The computer readable storage medium provided in the application may be, for example, a U disk, but is not limited to an electric, magnetic, optical, electromagnetic, infrared, or semiconductor system, system, or device, or any combination of the above. More specific examples of the computer readable storage medium may include, but are not limited to, an electric connection with one or more conductive wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the embodiment, the computer readable storage medium may be any tangible medium containing or storing a program that can be used or combined with an instruction execution system, system, or device. The program code contained on the computer readable storage medium can be transmitted by any suitable medium, including but not limited to an electric wire, an optical cable, an RF (Radio Frequency), and the like, or any suitable combination of the above.

[0161] The computer readable storage medium described above can be contained in the adaptive droop based grid integrated wind farm transient voltage control device, or can exist independently without being assembled into the adaptive droop based grid integrated wind farm transient voltage control device.

[0162] The computer readable storage medium described above carries one or more programs, when the one or more programs are executed by the adaptive droop based grid integrated wind farm transient voltage control device, the adaptive droop based grid integrated wind farm transient voltage control device is caused to: determine a power control instruction for minimizing the node voltage fluctuation of the grid integrated wind farm when detecting that the grid integrated wind turbine exists transient voltage; output the power control instruction to the grid integrated wind turbine; obtain a state parameter of the grid integrated wind turbine after responding to the power control instruction; determine a deviation between the state parameter and a state reference value, and adjust a grid integrated control parameter of the grid integrated wind turbine through a grid integrated control parameter droop coefficient of the grid integrated wind turbine and the deviation, so that the output voltage of the grid integrated wind turbine is in a preset voltage range and the output frequency is in a preset frequency range.

[0163] Computer program code for carrying out operations of the present application can be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider).

[0164] The computer program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks.

[0165] The modules involved in the embodiments of the present application can be implemented in software or hardware. In some cases, the names of the modules do not constitute a limitation on the modules themselves.

[0166] The readable storage medium provided by the application is a computer readable storage medium, which stores computer readable program instructions (i.e. computer programs) for executing the above-mentioned adaptive droop-based network-constructed wind farm transient voltage control method, and can solve the technical problem that the network-constructed wind farm in the prior art will cause voltage oscillation and frequency oscillation of the network-constructed wind turbine when subjected to transient voltage disturbance, thereby reducing the stability of the network-constructed wind farm. Compared with the prior art, the beneficial effects of the computer readable storage medium provided by the application are the same as those of the adaptive droop-based network-constructed wind farm transient voltage control method provided by the above-mentioned embodiments, and will not be repeated here.

[0167] The above-mentioned is only part of the embodiments of the application, and does not limit the patent scope of the application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or direct / indirect application in other related technical fields within the technical concept of the application, including in the patent protection scope of the application.

Claims

1. A method for transient voltage control of a network-forming wind farm based on adaptive droop, characterized in that, The method comprises: When detecting that the grid-connected wind turbine has transient voltage, determining a power control instruction for minimizing the node voltage fluctuation of the grid-connected wind farm; Obtaining line parameters of the grid-connected wind farm and unit parameters of the grid-connected wind turbine, the unit parameters at least comprising active power, reactive power and output voltage; Determining a grid-connected wind farm transient voltage model according to the line parameters, the active power, the reactive power and the output voltage, the grid-connected wind farm transient voltage model being: In the formula, is the i increment of output voltage of the grid-connected wind turbine, is the i increment of active power output of the grid-connected wind turbine, is the i increment of reactive power output of the grid-connected wind turbine; Taking the equation corresponding to the grid-connected wind farm transient voltage model as a transient voltage sensitivity equation; When detecting that the grid-connected wind turbine has transient voltage, obtaining a transient voltage sensitivity equation of the grid-connected wind farm, the transient voltage sensitivity equation representing the corresponding relationship between the output power of the grid-connected wind turbine and the node voltage fluctuation of the grid-connected wind farm; Determining an active power reference value and a reactive power reference value for minimizing the node voltage fluctuation through the transient voltage sensitivity equation; Obtaining a target function, the target function being: In the formula, is the minimum value of node voltage fluctuation, is the controller step size, is the number of grid-connected wind turbine generators, is the transient voltage optimization parameter, is the output voltage of the kth step of the i kth grid-connected wind turbine generator, is the voltage reference value of the kth grid-connected wind turbine generator, and i is the voltage reference value of the kth grid-connected wind turbine generator. Determining an active power reference value and a reactive power reference value for minimizing the node voltage fluctuation through the target function, the transient voltage sensitivity equation, the active power and the reactive power; Generating a power control instruction according to the active power reference value and the reactive power reference value; Outputting the power control instruction to the grid-connected wind turbine; Obtaining state parameters of the grid-connected wind turbine after responding to the power control instruction; Determining the deviation between the state parameters and a state reference value, and adjusting the grid-connected control parameters of the grid-connected wind turbine through the grid-connected control parameter 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.

2. The self-adapting droop networked wind farm transient voltage control method of claim 1, wherein, The step of determining an active power reference value and a reactive power reference value for minimizing the node voltage fluctuation through the target function, the transient voltage sensitivity equation, the active power and the reactive power comprises: Obtaining a constraint condition of the output power reference value, the constraint condition of the output power reference value being: In the formula, The i Active power reference value of the grid-connected wind turbine, The i Reactive power reference value of the grid-connected wind turbine, The i Maximum active power output of the grid-connected wind turbine, The i Maximum reactive power output of the grid-connected wind turbine, The number of grid-connected wind turbines; Adjusting the active power and the reactive power based on the target function, the transient voltage sensitivity equation and the constraint condition of the output power reference value, and determining the active power reference value and the reactive power reference value for minimizing the node voltage fluctuation.

3. The self-adapting droop networked wind farm transient voltage control method of claim 2, wherein, The state parameters comprise the output frequency and the reactive power of the grid-connected wind turbine, the state reference value comprises an output frequency reference value and the reactive power reference value, and the step of determining the deviation between the state parameters and a state reference value, and adjusting the grid-connected control parameters of the grid-connected wind turbine through the grid-connected control parameter 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 comprises: The step of adjusting the grid-connected control parameter of the grid-connected wind turbine based on the grid-connected control parameter droop coefficient of the grid-connected wind turbine, the frequency reference value and the reactive power reference value, and outputting the grid-connected control parameter reference value to the grid-connected wind turbine to make the output voltage of the grid-connected wind turbine in a preset voltage range and the output frequency in a preset frequency range, the grid-connected control parameter reference value including a virtual damping reference value, a virtual inertia reference value and a voltage coefficient reference value, comprises the following steps: The droop control optimization model is: In the formula, is the virtual damping reference value of the first i grid-connected wind turbine, is the virtual inertia reference value of the first i grid-connected wind turbine, is the voltage coefficient reference value of the first i grid-connected wind turbine, is the virtual damping droop coefficient in the grid-connection control parameter droop coefficient, is the virtual inertia droop coefficient in the grid-connection control parameter droop coefficient, is the voltage coefficient droop coefficient in the grid-connection control parameter droop coefficient, is the frequency reference value of the first i grid-connected wind turbine output, is the reactive power reference value of the first i grid-connected wind turbine, is the output frequency of the first i grid-connected wind turbine, is the reactive power output of the first i grid-connected wind turbine; The grid-connected control parameter constraint condition is: In the formula, is the maximum virtual damping value of the grid-connected wind turbine, i is the maximum virtual inertia value of the grid-connected wind turbine, is the maximum voltage coefficient value of the grid-connected wind turbine, i is the minimum virtual damping value of the grid-connected wind turbine, is the minimum virtual inertia value of the grid-connected wind turbine, i is the minimum voltage coefficient value of the grid-connected wind turbine, is the minimum virtual damping value of the grid-connected wind turbine, i is the minimum virtual inertia value of the grid-connected wind turbine, is the minimum voltage coefficient value of the grid-connected wind turbine, i is the minimum virtual damping value of the grid-connected wind turbine, is the minimum virtual inertia value of the grid-connected wind turbine, i is the minimum voltage coefficient value of the grid-connected wind turbine, is the number of grid-connected wind turbines.

4. The self-adapting droop networking-type wind farm transient voltage control method of claim 3, wherein, The step of adjusting the grid-connected control parameter 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, and outputting the grid-connected control parameter reference value to the grid-connected wind turbine to make the output voltage of the grid-connected wind turbine in a preset voltage range and the output frequency in a preset frequency range, the grid-connected control parameter reference value including a virtual damping reference value, a virtual inertia reference value and a voltage coefficient reference value, further comprises the following steps: A grid-connected transient coupling model is determined according to the line parameter and the unit parameter, and the grid-connected transient coupling model is: In the formula, is the output frequency of the first i grid-connected wind turbine, is the output frequency reference value of the first i grid-connected wind turbine, is the converter voltage of the first i grid-connected wind turbine, is the reactive power output of the first i grid-connected wind turbine, is the reactive power reference value output of the first i grid-connected wind turbine, is the virtual damping of the first i grid-connected wind turbine, is the virtual inertia of the first i grid-connected wind turbine, is the voltage coefficient of the first i grid-connected wind turbine. A preset droop control optimization model is determined according to the grid-connected transient coupling model.

5. An apparatus for implementing the adaptive droop based grid forming wind farm transient voltage control method of claims 1-4, characterized in that, The device comprises: An instruction module configured to determine a power control instruction for minimizing the node voltage fluctuation of the grid-connected wind farm when detecting that the grid-connected wind turbine exists transient voltage; A control module configured to output the power control instruction to the grid-connected wind turbine; A monitoring module configured to acquire a state parameter of the grid-connected wind turbine after the grid-connected wind turbine responds to the power control instruction; The control module is further configured to determine a deviation between the state parameter and a state reference value, and adjust the grid-connected control parameter of the grid-connected wind turbine based on the grid-connected control parameter droop coefficient of the grid-connected wind turbine and the deviation, so that the output voltage of the grid-connected wind turbine is in a preset voltage range and the output frequency is in a preset frequency range.

6. A network configuration type wind farm transient voltage control device based on adaptive droop, characterized in that, The device comprises a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program being configured to implement the steps of the grid-connected wind farm transient voltage control method based on adaptive droop according to any one of claims 1 to 4.

7. A storage medium, characterized by The storage medium is a computer readable storage medium, and the storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the grid-connected wind farm transient voltage control method based on adaptive droop according to any one of claims 1 to 4.

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