A wind farm reactive power control method, system, device, medium and product

Abstract

The present invention discloses a method, system, device, medium, and product for reactive power control of a wind farm, which relates to the technical field of reactive power control of power systems. The method obtains the operating parameters of the wind farm to be regulated, performs reactive compensation analysis on the operating parameters, obtains a given reactive power value, and inputs the operating parameters and the given reactive power value into a preset reactive output control model. The reactive output control model includes a voltage stabilization module and a regulation module. The voltage stabilization module is used to perform integral transformation on the operating parameters to obtain a reactive power variation. The regulation module performs power regulation processing on the reactive power variation and the given reactive power to obtain reactive power control instructions for each wind turbine. Each reactive power control instruction is used to regulate the power of the associated wind turbines. The method solves the technical problem that the existing system, which relies solely on reactive compensation devices, increases the demand for wind farms to be equipped with reactive compensation devices and increases the operating costs of wind farms.

Description

Technical Field

[0001] The present invention relates to the technical field of reactive power control of power systems, and in particular to a method, system, equipment, medium and product for reactive power control of wind farms. Background Art

[0002] With the continuous advancement of wind turbine technology, variable-speed constant-frequency (VSCF) wind turbines have gradually become the mainstream model for wind farms, primarily including doubly-fed asynchronous wind turbines and direct-drive permanent magnet synchronous wind turbines. VSCF wind turbine technology achieves decoupled control of active and reactive power, allowing independent regulation of the generator's active and reactive power. VSCF wind turbines can serve as a key reactive power source for wind farms. However, due to the thermal limitations of the wind turbine converter, wind turbines cannot consistently provide the required reactive power within the specified power factor range. This ultimately leads to voltage fluctuations and flicker at the wind farm access point. Therefore, reactive power regulation is crucial for wind farms.

[0003] At present, wind farms are equipped with reactive power compensation devices to smooth out voltage fluctuations in the power grid. However, in actual operation, relying solely on reactive power compensation devices will increase the demand for wind farms to be equipped with reactive power compensation devices, thereby increasing the operating costs of wind farms. Summary of the Invention

[0004] The present invention provides a wind farm reactive power control method, system, equipment, medium and product, which solves the technical problem that wind farms smooth out voltage fluctuations of the power grid by equipping them with reactive power compensation devices, but in actual operation, relying solely on reactive power compensation devices will increase the demand for wind farms to be equipped with reactive power compensation devices, thereby increasing the operating costs of wind farms.

[0005] A first aspect of the present invention provides a wind farm reactive power control method, comprising:

[0006] Obtaining operating parameters of the wind farm to be regulated, and performing reactive compensation analysis on the operating parameters to obtain a given reactive power value;

[0007] Inputting the operating condition parameters and the given reactive power value into a preset reactive output control model, wherein the reactive output control model includes a voltage stabilization module and a regulation module;

[0008] The voltage stabilization module is used to perform integral transformation on the operating parameters to obtain the reactive power variation;

[0009] The reactive power variation and the given reactive power are subjected to power regulation processing by the regulation module to obtain reactive power control instructions for each wind turbine in the wind farm to be regulated;

[0010] Each of the reactive power control instructions is used to adjust the power of the associated wind turbine.

[0011] Optionally, the step of performing reactive compensation analysis on the operating parameters to obtain a given reactive power value includes:

[0012] Determining the voltage of a remote control point of the wind farm to be regulated according to the operating condition parameters and a preset reactive power coefficient;

[0013] Matching the remote control point voltage with a preset reactive compensation adjustment list to obtain a reactive compensation adjustment amount;

[0014] Performing difference processing on the remote control point voltage and a preset control point reference voltage to obtain a control point voltage difference;

[0015] The control point voltage difference is multiplied by the reactive compensation adjustment amount to obtain a given reactive power value.

[0016] Optionally, the operating parameters include low-voltage bus active power, low-voltage bus reactive power, bus voltage, and wind farm impedance, and the step of determining the remote control point voltage of the wind farm to be regulated based on the operating parameters and a preset reactive coefficient includes:

[0017] Multiplying the low-voltage bus reactive power by a preset reactive coefficient to obtain a first product value;

[0018] Performing difference processing on the low-voltage bus active power and the first product value to obtain a first difference;

[0019] Ratio processing is performed on the first difference and the bus voltage to obtain a low-voltage side node current;

[0020] Multiplying the low-voltage side node current by the wind farm impedance to obtain a second product value;

[0021] Performing difference processing on the bus voltage and the second product value to obtain the remote control point voltage of the wind farm to be regulated.

[0022] Optionally, the voltage stabilization module includes a first differentiator and a first multiplier, and the step of using the voltage stabilization module to perform integral transformation on the operating condition parameter to obtain the reactive power variation includes:

[0023] Performing difference processing on the common point voltage value of the operating condition parameter and a preset common point rated voltage value by the first differentiator to obtain a common point voltage difference;

[0024] The first multiplier is used to multiply the common point voltage difference by a preset common point control coefficient to obtain a reactive power variation.

[0025] Optionally, the regulation module includes a first operation module, a second operation module, a first PI regulator, a power decomposer, and a second PI regulator group. The step of performing power regulation processing on the reactive power variation and the given reactive power by the regulation module to obtain the reactive power control instruction of each wind turbine in the wind farm to be regulated includes:

[0026] The reactive power variation and the given reactive power are summed by the first operation module to obtain a first reactive power setting value;

[0027] performing difference processing on the first reactive power setting value and the pre-acquired total reactive power by the second computing module to obtain a second reactive power setting value;

[0028] performing an integration operation on the second reactive power setting value using the first PI regulator to obtain a reactive power setting reference value;

[0029] Based on the pre-acquired number of wind turbines, the power decomposer is used to perform power distribution on the reactive power setting reference value to obtain a reactive power decomposition value;

[0030] The reactive power decomposition value and the pre-acquired motor reactive power data are input into the second PI regulator group for integration operation to obtain reactive power control instructions for each wind turbine in the wind farm to be regulated.

[0031] Optionally, the first PI regulator includes an integral controller, a proportional controller, and a third operation module, and the step of using the first PI regulator to perform an integral operation on the second reactive power setting value to obtain a reactive power setting reference value includes:

[0032] Using the integral controller to perform an integration operation on the second reactive power setting value to obtain a first setting parameter value;

[0033] Proportional adjustment is performed on the second reactive power setting value by using the proportional controller to obtain a second setting parameter value;

[0034] The first setting parameter value and the second setting parameter value are added together by the third operation module to obtain a reactive power setting reference value.

[0035] A second aspect of the present invention provides a wind farm reactive power control method, comprising:

[0036] The acquisition module is used to obtain the operating parameters of the wind farm to be regulated, and perform reactive compensation analysis on the operating parameters to obtain a given reactive power value;

[0037] An input module, configured to input the operating condition parameters and the given reactive power value into a preset reactive output control model, wherein the reactive output control model includes a voltage stabilization module and a regulation module;

[0038] A first analysis module is used to perform integral transformation on the operating parameters using the voltage stabilization module to obtain a reactive power variation;

[0039] a second analysis module, configured to perform power regulation processing on the reactive power variation and the given reactive power through the regulation module, to obtain reactive power control instructions for each wind turbine in the wind farm to be regulated;

[0040] The regulating module is used to use each of the reactive power control instructions to regulate the power of the associated wind turbine.

[0041] A third aspect of the present invention provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of any one of the wind farm reactive power control methods described above.

[0042] A fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed, implements any of the above-mentioned methods for reactive power control of a wind farm.

[0043] A fifth aspect of the present invention provides a computer program product, comprising a computer program stored on a non-transitory computer-readable storage medium, wherein the computer program comprises program instructions, wherein when the program instructions are executed by a computer, the computer is caused to execute the wind farm reactive power control method as described in any one of the above items.

[0044] It can be seen from the above technical solutions that the present invention has the following advantages:

[0045] The present invention obtains the operating parameters of the wind farm to be regulated and performs reactive compensation analysis on the operating parameters to obtain a given reactive power value. The operating parameters and the given reactive power value are then input into a reactive output control model to determine the reactive power control instructions for each wind turbine in the wind farm to be regulated. The given reactive power value is calculated based on the reactive compensation capacity of the wind farm to be regulated, maximizing the use of the wind farm's reactive compensation capacity and reducing the number of reactive compensation devices required for the wind farm. This overcomes the technical problem that existing methods, which rely solely on reactive compensation devices, increase the need for reactive compensation equipment in wind farms and increase wind farm operating costs. Compared to the prior art, the present invention calculates a given reactive power value based on the reactive compensation capacity of the wind farm to be regulated and inputs the given reactive power value into a reactive processing control model to obtain reactive power control instructions for each wind turbine in the wind farm to be regulated. This maximizes the reactive power capacity of each wind turbine and reduces wind farm operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0047] Figure 1 A flowchart of a method for controlling reactive power in a wind farm according to the first embodiment of the present invention;

[0048] Figure 2 A flowchart of a method for controlling reactive power in a wind farm according to a second embodiment of the present invention;

[0049] Figure 3 A schematic diagram of the structure of a reactive power output control model provided in the second embodiment of the present invention;

[0050] Figure 4 A schematic structural diagram of a first PI regulator provided in the second embodiment of the present invention;

[0051] Figure 5 A schematic structural diagram of a second PI regulator provided in the second embodiment of the present invention;

[0052] Figure 6 A schematic structural diagram of a power splitter provided in the second embodiment of the present invention;

[0053] Figure 7 A schematic diagram of the structure of the line between the wind farm and the power grid provided in the second embodiment of the present invention;

[0054] Figure 8This is a structural block diagram of a wind farm reactive power control system provided by the third embodiment of the present invention;

[0055] Figure 9 This is a structural block diagram of an electronic device provided in Example 4 of the present invention. DETAILED DESCRIPTION

[0056] Embodiments of the present invention provide a wind farm reactive power control method, system, device, medium, and product, which can be used to solve the technical problem that wind farms use reactive power compensation devices to smooth out voltage fluctuations in the power grid, but in actual operation, wind turbines basically do not participate in reactive power regulation, resulting in large-capacity, low-cost reactive power capacity being idle, increasing the demand for wind farms to be equipped with reactive power compensation devices, and thus increasing the operating costs of wind farms.

[0057] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0058] See also Figure 1 , Figure 1 This is a flowchart of a reactive power control method for a wind farm provided in the first embodiment of the present invention.

[0059] The present invention provides a wind farm reactive power control method, comprising:

[0060] Step 101: Acquire the operating parameters of the wind farm to be regulated, and perform reactive compensation analysis on the operating parameters to obtain a given reactive power value.

[0061] The operating parameters refer to the low-voltage bus active power, low-voltage bus reactive power, bus voltage, wind farm impedance and common point voltage value of the wind farm to be regulated.

[0062] In an embodiment of the present invention, the low-voltage bus active power, low-voltage bus reactive power, bus voltage, wind farm impedance and common point voltage value of the wind farm to be regulated are obtained, and reactive compensation analysis is performed based on the low-voltage bus active power, low-voltage bus reactive power, bus voltage and wind farm impedance to obtain a given reactive power value.

[0063] Step 102: Input the operating condition parameters and the given reactive power value into a preset reactive output control model, wherein the reactive output control model includes a voltage stabilization module and a regulation module.

[0064] In an embodiment of the present invention, the common point voltage value and the given reactive power value are input into a preset reactive output control model, wherein the reactive output control model includes a voltage stabilization module and a regulation module.

[0065] Step 103: Use the voltage stabilization module to perform integral transformation on the operating parameters to obtain the reactive power change.

[0066] In an embodiment of the present invention, the common point voltage value is input into a voltage stabilization module for voltage control to obtain a reactive power variation, wherein the voltage stabilization module includes a first differentiator and a first multiplier.

[0067] Step 104: The reactive power variation and the given reactive power are subjected to power regulation processing by the regulation module to obtain reactive power control instructions for each wind turbine in the wind farm to be regulated.

[0068] In the embodiment of the present invention, the reactive power variation and the given reactive power are input to the regulating module for reactive power distribution to obtain reactive power control instructions for each wind turbine in the wind farm to be regulated.

[0069] Step 105: Use each reactive power control instruction to adjust the power of the associated wind turbines.

[0070] In the embodiment of the present invention, power regulation of associated wind turbines is performed through various reactive power control instructions, thereby achieving reactive power regulation of the wind farm.

[0071] In an embodiment of the present invention, the operating parameters of the wind farm to be regulated are obtained, and reactive compensation analysis is performed on the operating parameters to obtain a given reactive power value. The operating parameters and the given reactive power value are then input into a reactive output control model to solve the reactive power control instructions for each wind turbine in the wind farm to be regulated. The given reactive power value is calculated based on the reactive compensation capacity of the wind farm to be regulated, and the reactive compensation capacity of the wind farm can be maximized to reduce the number of reactive compensation devices configured in the wind farm. This overcomes the technical problem that existing wind farms are equipped with reactive compensation devices to smooth out voltage fluctuations in the power grid, but in actual operation, the wind turbines basically do not participate in reactive power regulation, resulting in large-capacity, low-cost reactive power capacity being idle, which increases the operating costs of the wind farm. Compared with the existing technology, the present invention calculates a given reactive power value based on the reactive compensation capacity of the wind farm to be regulated, and inputs the given reactive power value into the reactive processing control model, thereby obtaining a reactive power control instruction for each wind turbine in the wind farm to be regulated, thereby maximizing the utilization of the reactive power capacity of each wind turbine and reducing the operating cost of the wind farm.

[0072] See also Figure 2 , Figure 2 This is a flowchart of a wind farm reactive power control method provided in the second embodiment of the present invention.

[0073] The present invention provides a wind farm reactive power control method, comprising:

[0074] Step 201: Acquire the operating parameters of the wind farm to be regulated, and determine the remote control point voltage of the wind farm to be regulated according to the operating parameters and a preset reactive power coefficient.

[0075] Furthermore, the operating parameters include low-voltage bus active power, low-voltage bus reactive power, bus voltage, and wind farm impedance. Step 201 includes the following sub-steps:

[0076] S11, multiplying the low-voltage bus reactive power by a preset reactive coefficient to obtain a first product value;

[0077] S12, performing difference processing on the low-voltage bus active power and the first product value to obtain a first difference;

[0078] S13, performing ratio processing on the first difference and the bus voltage to obtain a low-voltage side node current;

[0079] In an embodiment of the present invention, the low-voltage bus reactive power, the low-voltage bus active power and the bus voltage are input into a preset node current function to obtain the low-voltage side node current.

[0080] It should be noted that the node current function is specifically:

[0081]

[0082] in, is the low-voltage side node current, is the low voltage bus active power, is the low voltage bus reactive power, is the reactive power coefficient, is the bus voltage.

[0083] S14, multiplying the low-voltage side node current by the wind farm impedance to obtain a second product value;

[0084] S15. Perform difference processing on the bus voltage and the second product value to obtain the remote control point voltage of the wind farm to be regulated.

[0085] In the embodiment of the present invention, see Figure 7 As shown, according to the topology diagram of the line between the power grid and the wind farm, it can be deduced that the second product between the low-voltage side node current and the wind farm impedance is calculated, and the bus voltage and the second product are processed as the difference to obtain the remote control point voltage of the wind farm to be regulated.

[0086] Step 202: Match the voltage of the remote control point with the preset reactive compensation adjustment list to obtain a reactive compensation adjustment amount.

[0087] In an embodiment of the present invention, the voltage at the remote control point is matched in a preset reactive compensation adjustment list to match the corresponding reactive compensation adjustment amount.

[0088] Step 203 : performing difference processing on the remote control point voltage and the preset control point reference voltage to obtain a control point voltage difference.

[0089] In an embodiment of the present invention, the difference between the remote control point voltage and a preset control point reference voltage is calculated to obtain the control point voltage difference.

[0090] Step 204: Multiply the voltage difference at the control point by the reactive compensation adjustment amount to obtain a given reactive power value.

[0091] In the embodiment of the present invention, the multiplication value between the voltage difference at the control point and the reactive compensation adjustment amount is calculated to obtain a given reactive power value.

[0092] Step 205: Input the operating condition parameters and the given reactive power value into a preset reactive output control model, wherein the reactive output control model includes a voltage stabilization module and a regulation module.

[0093] In the embodiment of the present invention, see Figure 3 As shown, the common point voltage value of the operating condition parameter is input into the voltage stabilization module of the preset reactive output control module, and the given reactive power value is input into the regulation module of the reactive output control model.

[0094] Step 206: Use the voltage stabilization module to perform integral transformation on the operating parameters to obtain the reactive power change.

[0095] Furthermore, the voltage stabilization module may include a first differentiator and a first multiplier, and step 206 may include the following sub-steps:

[0096] S21 . Perform difference processing on the common point voltage value of the operating condition parameter and a preset common point rated voltage value through a first differentiator to obtain a common point voltage difference.

[0097] In an embodiment of the present invention, the common point voltage value of the operating condition parameter and the preset common point rated voltage value are input into a first differentiator for difference processing to obtain the common point voltage difference.

[0098] S22. Use a first multiplier to multiply the common point voltage difference by a preset common point control coefficient to obtain a reactive power variation.

[0099] In an embodiment of the present invention, the common point voltage difference and a preset common point control coefficient are input into a first multiplier to obtain a reactive power variation.

[0100] Step 207: The reactive power variation and the given reactive power are subjected to power regulation processing by the regulation module to obtain reactive power control instructions for each wind turbine in the wind farm to be regulated.

[0101] Furthermore, the regulating module may include a first operating module, a second operating module, a first PI regulator, a power decomposer, and a second PI regulator group. Step 207 may include the following sub-steps:

[0102] S31. A first operation module is used to add the reactive power variation and the given reactive power to obtain a first reactive power setting value.

[0103] In the embodiment of the present invention, the first operation module is used to calculate the sum of the reactive power change and the given reactive power to obtain the first reactive power setting value.

[0104] S32. Perform difference processing on the first reactive power setting value and the pre-acquired total reactive power through a second operation module to obtain a second reactive power setting value.

[0105] Total reactive power refers to the sum of the reactive powers of all wind turbines in the wind farm at the previous moment.

[0106] In an embodiment of the present invention, a second operation module is used to calculate the difference between the first reactive power setting value and the pre-acquired total reactive power to obtain the second reactive power setting value.

[0107] S33. Use the first PI regulator to perform an integration operation on the second reactive power setting value to obtain a reactive power setting reference value.

[0108] Furthermore, the first PI regulator may include an integral controller, a proportional controller, and a third operation module, and S33 may include the following sub-steps:

[0109] S331, using an integral controller to perform an integral operation on the second reactive power setting value to obtain a first setting parameter value;

[0110] S332, using a proportional controller to proportionally adjust the second reactive power setting value to obtain a second setting parameter value;

[0111] S333: Using a third operation module, add the first setting parameter value and the second setting parameter value to obtain a reactive power setting reference value.

[0112] In the embodiment of the present invention, see Figure 4 As shown, the second reactive power setting value is input into the integral controller and the proportional controller respectively to obtain the first setting parameter value and the second setting parameter value. The first setting parameter value and the second setting parameter value are summed using a third operation module to obtain a reactive power setting reference value.

[0113] S34. Based on the pre-acquired number of wind turbines, a power decomposer is used to perform power distribution on the reactive power setting reference value to obtain a reactive power decomposition value.

[0114] The number of wind turbines refers to the number of wind turbines in the wind farm to be regulated.

[0115] In an embodiment of the present invention, referring to FIG6 , a power decomposer performs ratio processing on a reactive power setting reference value and a pre-acquired number of wind turbines to obtain a reactive power decomposition value.

[0116] S35 , inputting the reactive power decomposition value and the pre-acquired motor reactive power data into the second PI regulator group for integration operation to obtain reactive power control instructions for each wind turbine in the wind farm to be regulated.

[0117] It should be noted that, see Figure 3 As shown, the second PI regulator group includes multiple second PI regulators, and each second PI regulator is associated with a fan.

[0118] The motor reactive power data refers to the reactive power actually output by each wind turbine in the wind farm to be controlled at the previous moment.

[0119] In the embodiment of the present invention, see Figure 5 As shown, for each wind turbine in the wind farm to be regulated, taking wind turbine 1 as an example, a differential controller is used to perform differential processing on the reactive power decomposition value and the pre-acquired motor reactive power (i.e., the reactive power actually output by wind turbine 1 at the previous moment) to obtain an intermediate power regulation value. This intermediate power regulation value is then input into the integral controller and the proportional controller, respectively, to obtain a first intermediate setpoint and a second intermediate setpoint. A summation controller is used to sum the first and second intermediate setpoints to obtain the reactive power control command for wind turbine 1.

[0120] Step 208: Use each reactive power control instruction to adjust the power of the associated wind turbines.

[0121] In the embodiment of the present invention, power regulation is performed on associated wind turbines according to each reactive power control instruction, thereby achieving reactive power regulation of the wind farm to be regulated.

[0122] In an embodiment of the present invention, the operating parameters of the wind farm to be regulated are obtained, and reactive compensation analysis is performed on the operating parameters to obtain a given reactive power value. The operating parameters and the given reactive power value are then input into a reactive output control model to solve the reactive power control instructions for each wind turbine in the wind farm to be regulated. The given reactive power value is calculated based on the reactive compensation capacity of the wind farm to be regulated, and the reactive compensation capacity of the wind farm can be maximized to reduce the number of reactive compensation devices configured in the wind farm. This overcomes the technical problem that existing wind farms are equipped with reactive compensation devices to smooth out voltage fluctuations in the power grid, but in actual operation, the wind turbines basically do not participate in reactive power regulation, resulting in large-capacity, low-cost reactive power capacity being idle, which increases the operating costs of the wind farm. Compared with the existing technology, the present invention calculates a given reactive power value based on the reactive compensation capacity of the wind farm to be regulated, and inputs the given reactive power value into the reactive processing control model, thereby obtaining a reactive power control instruction for each wind turbine in the wind farm to be regulated, thereby maximizing the utilization of the reactive power capacity of each wind turbine and reducing the operating cost of the wind farm.

[0123] See also Figure 8 , Figure 8 This is a structural block diagram of a wind farm reactive power control system provided by the third embodiment of the present invention.

[0124] The present invention provides a wind farm reactive power control system, comprising:

[0125] The acquisition module 301 is used to obtain the operating parameters of the wind farm to be regulated, and perform reactive compensation analysis on the operating parameters to obtain a given reactive power value;

[0126] An input module 302 is used to input operating parameters and a given reactive power value into a preset reactive output control model, wherein the reactive output control model includes a voltage stabilization module and a regulation module;

[0127] The first analysis module 303 is used to perform integral transformation on the operating parameters using the voltage stabilization module to obtain a reactive power change;

[0128] The second analysis module 304 is used to perform power regulation processing on the reactive power variation and the given reactive power through the regulation module to obtain reactive power control instructions for each wind turbine in the wind farm to be regulated;

[0129] The regulating module 305 is configured to use each reactive power control instruction to regulate the power of the associated wind turbines.

[0130] Furthermore, the acquisition module 301 includes:

[0131] The first analysis submodule is used to determine the voltage of the remote control point of the wind farm to be regulated based on the operating parameters and the preset reactive power coefficient;

[0132] The matching submodule is used to match the voltage of the remote control point with the preset reactive compensation adjustment list to obtain the reactive compensation adjustment amount;

[0133] The second analysis submodule is used to perform difference processing on the remote control point voltage and the preset control point reference voltage to obtain the control point voltage difference;

[0134] The voltage difference at the control point is multiplied by the reactive compensation adjustment amount to obtain a given reactive power value.

[0135] Furthermore, the operating parameters include low-voltage bus active power, low-voltage bus reactive power, bus voltage, and wind farm impedance. The first analysis submodule includes:

[0136] A first analysis unit is configured to multiply the low-voltage bus reactive power by a preset reactive coefficient to obtain a first product value;

[0137] A second analysis unit is configured to perform difference processing on the low-voltage bus active power and the first product value to obtain a first difference;

[0138] A third analysis unit is used to perform ratio processing on the first difference and the bus voltage to obtain a low-voltage side node current;

[0139] a fourth analysis unit, configured to multiply the low-voltage side node current by the wind farm impedance to obtain a second product value;

[0140] The bus voltage and the second product value are subjected to difference processing to obtain the remote control point voltage of the wind farm to be regulated.

[0141] Furthermore, the voltage stabilization module includes a first differentiator and a first multiplier, and the first analysis module 303 includes:

[0142] a third analysis submodule, configured to perform difference processing on the common point voltage value of the operating condition parameter and a preset common point rated voltage value through a first differentiator to obtain a common point voltage difference;

[0143] The fourth analysis submodule is configured to multiply the common point voltage difference by a preset common point control coefficient using a first multiplier to obtain a reactive power variation.

[0144] Furthermore, the regulation module includes a first operation module, a second operation module, a first PI regulator, a power decomposer and a second PI regulator group, and a second analysis module 304 includes:

[0145] a fifth analysis submodule, configured to perform summation processing on the reactive power variation and the given reactive power through the first operation module to obtain a first reactive power set value;

[0146] a sixth analysis submodule, configured to perform difference processing on the first reactive power setting value and the pre-acquired total reactive power through the second operation module to obtain a second reactive power setting value;

[0147] a first regulating submodule, configured to perform an integration operation on the second reactive power setting value using a first PI regulator to obtain a reactive power setting reference value;

[0148] The power distribution submodule is used to distribute the reactive power setting reference value using a power decomposer based on the pre-acquired number of wind turbines to obtain a reactive power decomposition value;

[0149] The second regulating submodule is used to input the reactive power decomposition value and the pre-acquired motor reactive power data into the second PI regulator group for integration operation to obtain the reactive power control instructions of each wind turbine in the wind farm to be regulated.

[0150] Furthermore, the first PI regulator includes an integral controller, a proportional controller and a third operation module, and the first regulation submodule includes:

[0151] an integration unit, configured to perform an integration operation on the second reactive power setting value using an integration controller to obtain a first setting parameter value;

[0152] a proportional unit, configured to proportionally adjust the second reactive power setting value using a proportional controller to obtain a second setting parameter value;

[0153] The adding unit is used to perform a summing process on the first setting parameter value and the second setting parameter value through the third operation module to obtain a reactive power setting reference value.

[0154] See also Figure 9 , Figure 9 This is a structural block diagram of an electronic device provided in Example 4 of the present invention.

[0155] An electronic device according to an embodiment of the present invention includes: a memory 401 and a processor 402, wherein the memory 402 stores a computer program; when the computer program is executed by the processor 402, the processor 402 executes the wind farm reactive power control method according to any of the above embodiments.

[0156] Memory 401 may be an electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read-Only Memory), EPROM, hard disk, or ROM. Memory 401 has storage space 403 for program code 413 for executing any of the method steps described above. For example, storage space 403 for program code may include individual program codes 413 for implementing various steps in the method described above. These program codes may be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards, or floppy disks. The program codes may be compressed, for example, in a suitable format. When executed by a processing device, these codes cause the processing device to execute the various steps in the method described above.

[0157] The fifth embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the wind farm reactive power control method according to any of the above embodiments is implemented.

[0158] Embodiment 6 of the present invention further provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the wind farm reactive power control method as described in any of the above embodiments.

[0159] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0160] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0161] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0162] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0163] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the method of the present invention. The aforementioned storage medium includes various media that can store program code, such as USB flash drives, mobile hard drives, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical disks.

[0164] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A wind farm reactive power control method, characterized in that: include: Obtaining operating parameters of the wind farm to be regulated, and performing reactive compensation analysis on the operating parameters to obtain a given reactive power value; Inputting the operating condition parameters and the given reactive power value into a preset reactive output control model, wherein the reactive output control model includes a voltage stabilization module and a regulation module; Using the voltage stabilization module to perform integral transformation on the operating condition parameters to obtain a reactive power change; The reactive power variation and the given reactive power are subjected to power regulation processing by the regulation module to obtain reactive power control instructions for each wind turbine in the wind farm to be regulated; Using each of the reactive power control instructions to adjust the power of the associated wind turbine; The step of performing reactive compensation analysis on the operating parameters to obtain a given reactive power value includes: Determining the voltage of a remote control point of the wind farm to be regulated according to the operating condition parameters and a preset reactive power coefficient; Matching the remote control point voltage with a preset reactive compensation adjustment list to obtain a reactive compensation adjustment amount; Performing difference processing on the remote control point voltage and a preset control point reference voltage to obtain a control point voltage difference; Multiplying the voltage difference at the control point by the reactive compensation adjustment amount to obtain a given reactive power value; The operating parameters include low-voltage bus active power, low-voltage bus reactive power, bus voltage, and wind farm impedance; the step of determining the remote control point voltage of the wind farm to be regulated based on the operating parameters and a preset reactive coefficient includes: Multiplying the low-voltage bus reactive power by a preset reactive coefficient to obtain a first product value; Performing difference processing on the low-voltage bus active power and the first product value to obtain a first difference; Performing ratio processing on the first difference and the bus voltage to obtain a low-voltage side node current; Multiplying the low-voltage side node current by the wind farm impedance to obtain a second product value; Performing difference processing on the bus voltage and the second product value to obtain the remote control point voltage of the wind farm to be regulated.

2. The wind farm reactive power control method according to claim 1, characterized in that: The voltage stabilization module includes a first differentiator and a first multiplier; the step of using the voltage stabilization module to perform integral transformation on the operating condition parameter to obtain the reactive power variation includes: Performing difference processing on the common point voltage value of the operating condition parameter and a preset common point rated voltage value by the first differentiator to obtain a common point voltage difference; The first multiplier is used to multiply the common point voltage difference by a preset common point control coefficient to obtain a reactive power variation.

3. The wind farm reactive power control method according to any one of claims 1 to 2, characterized in that: The regulation module includes a first operation module, a second operation module, a first PI regulator, a power decomposer, and a second PI regulator group; the step of performing power regulation processing on the reactive power variation and the given reactive power by the regulation module to obtain reactive power control instructions for each wind turbine in the wind farm to be regulated includes: The reactive power variation and the given reactive power are summed by the first operation module to obtain a first reactive power setting value; performing difference processing on the first reactive power setting value and the pre-acquired total reactive power by the second computing module to obtain a second reactive power setting value; performing an integration operation on the second reactive power setting value using the first PI regulator to obtain a reactive power setting reference value; Based on the pre-acquired number of wind turbines, the power decomposer is used to perform power distribution on the reactive power setting reference value to obtain a reactive power decomposition value; The reactive power decomposition value and the pre-acquired motor reactive power data are input into the second PI regulator group for integration operation to obtain reactive power control instructions for each wind turbine in the wind farm to be regulated.

4. The wind farm reactive power control method according to claim 3, characterized in that: The first PI regulator includes an integral controller, a proportional controller, and a third operation module. The step of using the first PI regulator to perform an integral operation on the second reactive power setting value to obtain a reactive power setting reference value includes: Using the integral controller to perform an integration operation on the second reactive power setting value to obtain a first setting parameter value; Proportional adjustment is performed on the second reactive power setting value by using the proportional controller to obtain a second setting parameter value; The first setting parameter value and the second setting parameter value are added together by the third operation module to obtain a reactive power setting reference value.

5. A wind farm reactive power control system, characterized in that: include: The acquisition module is used to obtain the operating parameters of the wind farm to be regulated, and perform reactive compensation analysis on the operating parameters to obtain a given reactive power value; An input module, configured to input the operating condition parameters and the given reactive power value into a preset reactive output control model, wherein the reactive output control model includes a voltage stabilization module and a regulation module; A first analysis module is configured to perform an integral transformation on the operating condition parameter using the voltage stabilization module to obtain a reactive power variation; a second analysis module, configured to perform power regulation processing on the reactive power variation and the given reactive power through the regulation module, to obtain reactive power control instructions for each wind turbine in the wind farm to be regulated; a regulating module, configured to use each of the reactive power control instructions to regulate the power of the associated wind turbine; The acquisition module includes: A first analysis submodule, configured to determine the voltage at a remote control point of the wind farm to be regulated based on the operating parameters and a preset reactive power coefficient; A matching submodule, configured to match the remote control point voltage with a preset reactive compensation adjustment list to obtain a reactive compensation adjustment amount; A second analysis submodule is configured to perform difference processing on the remote control point voltage and a preset control point reference voltage to obtain a control point voltage difference; Multiplying the voltage difference at the control point by the reactive compensation adjustment amount to obtain a given reactive power value; The operating parameters include low-voltage bus active power, low-voltage bus reactive power, bus voltage, and wind farm impedance. The first analysis submodule includes: A first analyzing unit is configured to multiply the low-voltage bus reactive power by a preset reactive coefficient to obtain a first product value; a second analyzing unit, configured to perform difference processing on the low-voltage bus active power and the first product value to obtain a first difference; a third analyzing unit, configured to perform ratio processing on the first difference and the bus voltage to obtain a low-voltage side node current; a fourth analyzing unit, configured to multiply the low-voltage side node current by the wind farm impedance to obtain a second product; Performing difference processing on the bus voltage and the second product value to obtain the remote control point voltage of the wind farm to be regulated.

6. An electronic device, characterized in that: The method comprises a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the steps of the wind farm reactive power control method according to any one of claims 1 to 4.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed, the wind farm reactive power control method according to any one of claims 1 to 4 is implemented.

8. A computer program product, characterized in that The computer program product includes a computer program stored on a non-transitory computer-readable storage medium, wherein the computer program includes program instructions, wherein when the program instructions are executed by a computer, the computer is enabled to execute the wind farm reactive power control method according to any one of claims 1 to 4.

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