Full-power wind turbine generator networking control method and device, computer equipment and storage medium

Abstract

The invention relates to a full-power type wind turbine generator networking control method. The method comprises the following steps: carrying out proportional link processing and series lead correction link processing on a direct-current capacitor voltage given value and a direct-current capacitor voltage feedback quantity of the full-power wind turbine generator to obtain an output frequency; based on the output frequency, the reactive power deviation is introduced into a direct-current voltage control loop of the full-power type wind turbine generator set through a first high-pass filter, and the output frequency of the grid-side converter is output; introducing a frequency difference value between the grid-side variable current output frequency after passing through a second high-pass filter and the reference frequency of the full-power type wind turbine generator set into a feedback loop synchronously controlled by the direct-current voltage to obtain a frequency deviation of the full-power type wind turbine generator set; and according to the grid-side modulation voltage instruction and the machine-side modulation voltage instruction of the full-power type wind turbine generator and the frequency deviation, performing grid construction control on the full-power type wind turbine generator. By adopting the method, the network construction control stability of the full-power wind turbine generator can be improved.

Description

Technical Field

[0001] The present application relates to the field of renewable energy power generation technology, and in particular to a full-power wind turbine generator system network control method, device, computer equipment, storage medium and computer program product. Background Art

[0002] With the continuous increase in wind power installed capacity, wind power generation technology has become a research hotspot. The basic principle of wind power generation is to use the wind to drive the wind rotor to obtain rotational torque, so as to drive the main shaft of the wind rotor to rotate, realize the conversion of wind energy into mechanical energy, and then convert the mechanical energy into electrical energy through the transmission system and generator, and finally realize grid-connected operation through the wind power converter. With the high proportion of wind power generation connected to the grid, the stable operation capacity of full-power wind turbines is facing challenges.

[0003] The traditional grid-connected converter system adopts a phase-locked loop synchronized grid-following control. This method relies on the grid connection point information and has the characteristics of low inertia and low damping. It is not suitable for high-penetration grid systems. Researchers have proposed a grid-forming control method that can achieve self-synchronization with the grid, which can provide certain voltage and frequency support for the grid. In addition, research on the voltage stability problem of grid-forming control is also quite popular. However, when the grid frequency is disturbed, the disturbance signal will affect the dynamic and steady-state process of the DC voltage. Due to the coupling between active power and reactive power, when the reactive power fluctuates, it will affect the active power through the coupling channel, thereby further affecting the stability of the DC voltage control on the grid side. Similarly, when the DC voltage fluctuates, it will also affect the fluctuation of reactive power. Therefore, the grid-forming control method has the defect of low stability. Summary of the invention

[0004] Based on this, it is necessary to provide a full-power wind turbine network control method, device, computer equipment, computer-readable storage medium and computer program product that can improve the network control stability of full-power wind turbines in response to the above technical problems.

[0005] In a first aspect, the present application provides a full-power wind turbine network control method. The method comprises:

[0006] Performing proportional link processing and series lead correction link processing on a given value of a DC capacitor voltage and a feedback amount of a DC capacitor voltage of a full-power wind turbine generator set to obtain an output frequency of the full-power wind turbine generator set;

[0007] Based on the output frequency, the value of the reactive power deviation after passing through the first high-pass filter is introduced into the DC voltage control loop of the full-power wind turbine generator set, and the grid-side converter output frequency of the full-power wind turbine generator set is output; the reactive power deviation is obtained according to the reactive power given value and reactive power of the full-power wind turbine generator set;

[0008] The frequency difference between the grid-side converter output frequency after passing through the second high-pass filter and the reference frequency of the full-power wind turbine generator set is introduced into the feedback loop of the DC voltage synchronous control of the full-power wind turbine generator set to obtain the frequency deviation of the full-power wind turbine generator set;

[0009] The full-power wind turbine is controlled to form a grid according to the grid-side modulation voltage instruction and the machine-side modulation voltage instruction of the full-power wind turbine, as well as the frequency deviation; the grid-side modulation voltage instruction is obtained according to the output frequency of the grid-side converter; the machine-side modulation voltage instruction is obtained according to the stator current of the full-power wind turbine.

[0010] In one embodiment, a DC capacitor voltage given value and a DC capacitor voltage feedback value of a full-power wind turbine generator set are processed by a proportional link and a series lead correction link to obtain an output frequency of the full-power wind turbine generator set, including:

[0011] Performing proportional link processing on the difference between the DC capacitor voltage given value and the DC capacitor voltage feedback amount to obtain first data;

[0012] Performing a series advance correction process on the first data to obtain second data;

[0013] The output frequency of the full-power wind turbine generator set is obtained according to the sum of the second data and the reference frequency of the full-power wind turbine generator set.

[0014] In one of the embodiments, based on the output frequency, the value of the reactive power deviation after passing through the first high-pass filter is introduced into the DC voltage control loop of the full-power wind turbine generator set, and the grid-side converter output frequency of the full-power wind turbine generator set is output, including:

[0015] Performing high-pass filtering on the reactive power deviation through the first high-pass filter to obtain third data;

[0016] The output frequency of the grid-side converter is obtained according to the difference between the output frequency and the third data.

[0017] In one of the embodiments, before performing grid control on the full-power wind turbine generator set according to the grid-side modulation voltage instruction and the machine-side modulation voltage instruction of the full-power wind turbine generator set and the frequency deviation, the method further includes:

[0018] According to the d-axis voltage component and the q-axis voltage component of the grid-side connection point voltage of the full-power wind turbine generator set in a synchronous rotating coordinate system, and the d-axis current component and the q-axis current component of the grid-side inductor current of the full-power wind turbine generator set in a synchronous rotating coordinate system, the reactive power of the back-to-back converter in the full-power wind turbine generator set is obtained;

[0019] The reactive power is input into the reactive AC voltage loop model of the full-power wind turbine to obtain the AC voltage amplitude of the full-power wind turbine; the reactive AC voltage loop model is constructed according to the proportional coefficient and integral coefficient of the preset reactive loop proportional-integral regulator;

[0020] The difference between the target parameter and the q-axis voltage component and the difference between the AC voltage amplitude and the d-axis voltage component are input into the voltage-current double closed loop of the full-power wind turbine generator set to obtain the grid-side modulation voltage instruction.

[0021] In one of the embodiments, before performing grid control on the full-power wind turbine generator set according to the grid-side modulation voltage instruction and the machine-side modulation voltage instruction of the full-power wind turbine generator set and the frequency deviation, the method further includes:

[0022] Obtaining a d-axis current component and a q-axis current component of a stator current of a permanent magnet wind generator in the full-power wind turbine generator set;

[0023] The d-axis current component and the q-axis current component are input into the current closed loop of the full-power wind turbine generator set to obtain the machine-side modulation voltage instruction.

[0024] In one embodiment, the grid-building control of the full-power wind turbine generator set is performed according to the grid-side modulation voltage instruction and the machine-side modulation voltage instruction of the full-power wind turbine generator set, and the frequency deviation, including:

[0025] According to the grid-side converter angle, coordinate transformation processing and space vector pulse width modulation processing are performed on the grid-side modulation voltage command and the generator-side modulation voltage command to obtain a switch tube drive signal of the full-power wind turbine generator set;

[0026] Based on the switch tube driving signal, the grid-side converter and the machine-side converter of the full-power wind turbine are controlled, and according to the frequency deviation, the DC voltage synchronization control of the full-power wind turbine is updated.

[0027] In a second aspect, the present application also provides a full-power wind turbine network control device. The device comprises:

[0028] A proportional link processing module, used for performing proportional link processing and series lead correction link processing on a DC capacitor voltage given value and a DC capacitor voltage feedback amount of a full-power wind turbine generator set to obtain an output frequency of the full-power wind turbine generator set;

[0029] A voltage synchronization control module is used to introduce the value of the reactive power deviation after passing through the first high-pass filter into the DC voltage control loop of the full-power wind turbine generator set based on the output frequency, and output the grid-side converter output frequency of the full-power wind turbine generator set; the reactive power deviation is obtained according to the reactive power given value and reactive power of the full-power wind turbine generator set;

[0030] A reactive power decoupling module is used to introduce the frequency difference between the grid-side converter output frequency after passing through the second high-pass filter and the reference frequency of the full-power wind turbine generator set into the feedback loop of the DC voltage synchronous control of the full-power wind turbine generator set to obtain the frequency deviation of the full-power wind turbine generator set;

[0031] The unit network control module is used to perform network control on the full-power wind turbine unit according to the grid-side modulation voltage instruction and the machine-side modulation voltage instruction of the full-power wind turbine unit, and the frequency deviation; the grid-side modulation voltage instruction is obtained according to the output frequency of the grid-side converter; the machine-side modulation voltage instruction is obtained according to the stator current of the full-power wind turbine unit.

[0032] In a third aspect, the present application further provides a computer device. The computer device includes a memory and a processor, the memory stores a computer program, and the processor implements the following steps when executing the computer program:

[0033] Performing proportional link processing and series lead correction link processing on a given value of a DC capacitor voltage and a feedback amount of a DC capacitor voltage of a full-power wind turbine generator set to obtain an output frequency of the full-power wind turbine generator set;

[0034] Based on the output frequency, the value of the reactive power deviation after passing through the first high-pass filter is introduced into the DC voltage control loop of the full-power wind turbine generator set, and the grid-side converter output frequency of the full-power wind turbine generator set is output; the reactive power deviation is obtained according to the reactive power given value and reactive power of the full-power wind turbine generator set;

[0035] The frequency difference between the grid-side converter output frequency after passing through the second high-pass filter and the reference frequency of the full-power wind turbine generator set is introduced into the feedback loop of the DC voltage synchronous control of the full-power wind turbine generator set to obtain the frequency deviation of the full-power wind turbine generator set;

[0036] The full-power wind turbine is controlled to form a grid according to the grid-side modulation voltage instruction and the machine-side modulation voltage instruction of the full-power wind turbine, as well as the frequency deviation; the grid-side modulation voltage instruction is obtained according to the output frequency of the grid-side converter; the machine-side modulation voltage instruction is obtained according to the stator current of the full-power wind turbine.

[0037] In a fourth aspect, the present application further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the following steps are implemented:

[0038] Performing proportional link processing and series lead correction link processing on a given value of a DC capacitor voltage and a feedback amount of a DC capacitor voltage of a full-power wind turbine generator set to obtain an output frequency of the full-power wind turbine generator set;

[0039] Based on the output frequency, the value of the reactive power deviation after passing through the first high-pass filter is introduced into the DC voltage control loop of the full-power wind turbine generator set, and the grid-side converter output frequency of the full-power wind turbine generator set is output; the reactive power deviation is obtained according to the reactive power given value and reactive power of the full-power wind turbine generator set;

[0040] The frequency difference between the grid-side converter output frequency after passing through the second high-pass filter and the reference frequency of the full-power wind turbine generator set is introduced into the feedback loop of the DC voltage synchronous control of the full-power wind turbine generator set to obtain the frequency deviation of the full-power wind turbine generator set;

[0041] The full-power wind turbine is controlled to form a grid according to the grid-side modulation voltage instruction and the machine-side modulation voltage instruction of the full-power wind turbine, as well as the frequency deviation; the grid-side modulation voltage instruction is obtained according to the output frequency of the grid-side converter; the machine-side modulation voltage instruction is obtained according to the stator current of the full-power wind turbine.

[0042] In a fifth aspect, the present application further provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the following steps are implemented:

[0043] Performing proportional link processing and series lead correction link processing on a given value of a DC capacitor voltage and a feedback amount of a DC capacitor voltage of a full-power wind turbine generator set to obtain an output frequency of the full-power wind turbine generator set;

[0044] Based on the output frequency, the value of the reactive power deviation after passing through the first high-pass filter is introduced into the DC voltage control loop of the full-power wind turbine generator set, and the grid-side converter output frequency of the full-power wind turbine generator set is output; the reactive power deviation is obtained according to the reactive power given value and reactive power of the full-power wind turbine generator set;

[0045] The frequency difference between the grid-side converter output frequency after passing through the second high-pass filter and the reference frequency of the full-power wind turbine generator set is introduced into the feedback loop of the DC voltage synchronous control of the full-power wind turbine generator set to obtain the frequency deviation of the full-power wind turbine generator set;

[0046] The full-power wind turbine is controlled to form a grid according to the grid-side modulation voltage instruction and the machine-side modulation voltage instruction of the full-power wind turbine, as well as the frequency deviation; the grid-side modulation voltage instruction is obtained according to the output frequency of the grid-side converter; the machine-side modulation voltage instruction is obtained according to the stator current of the full-power wind turbine.

[0047] The above-mentioned full-power wind turbine network control method, device, computer equipment, storage medium and computer program product perform proportional link processing and series lead correction link processing on the DC capacitor voltage set value and DC capacitor voltage feedback of the full-power wind turbine to obtain the output frequency of the full-power wind turbine; based on the output frequency, the reactive power deviation is introduced into the DC voltage control loop of the full-power wind turbine through a first high-pass filter to output the grid-side converter output frequency of the full-power wind turbine; the reactive power deviation is calculated based on the reactive power set value and the DC capacitor voltage feedback of the full-power wind turbine Reactive power is obtained; the frequency difference between the grid-side converter output frequency after passing through the second high-pass filter and the reference frequency of the full-power wind turbine is introduced into the feedback loop of the DC voltage synchronous control of the full-power wind turbine to obtain the frequency deviation of the full-power wind turbine; according to the grid-side modulation voltage command and the machine-side modulation voltage command of the full-power wind turbine, as well as the frequency deviation, the full-power wind turbine is grid-controlled; the grid-side modulation voltage command is obtained according to the grid-side converter output frequency; the machine-side modulation voltage command is obtained according to the stator current of the full-power wind turbine. By adopting this method, the output frequency of the full-power wind turbine can be optimized through the proportional link and the series lead correction link, providing better frequency support for the power grid, thereby improving the stability of the full-power wind turbine when connected to the grid for power generation; by introducing the reactive power deviation into the DC voltage control loop through a high-pass filter, DC voltage compensation of reactive feedforward is achieved; by optimizing the DC voltage synchronous control using the frequency deviation, the stability of the wind turbine when the power grid frequency is disturbed is further enhanced, and the stability of the grid control of the full-power wind turbine is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic flow chart of a full-power wind turbine network control method in one embodiment;

[0049] Figure 2 A schematic diagram of a flow chart of steps for obtaining the output frequency of a full-power wind turbine generator set in one embodiment;

[0050] Figure 3 A diagram of a DC voltage synchronous control structure with power decoupling and frequency deviation optimization in one embodiment;

[0051] Figure 4 A reactive power-AC voltage control structure diagram in one embodiment;

[0052] Figure 5 A voltage and current double closed-loop control structure diagram in one embodiment;

[0053] Figure 6 A diagram showing a closed-loop control structure of a generator-side current in an embodiment;

[0054] Figure 7 A full-power wind turbine network control structure diagram of DC voltage synchronization with power decoupling and frequency deviation optimization in one embodiment;

[0055] Figure 8 A schematic diagram of a flow chart of a full-power wind turbine network control method in another embodiment;

[0056] Fig. 9 It is a structural block diagram of a full-power wind turbine generator network control device in one embodiment;

[0057] Fig.10 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0059] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0060] In one embodiment, Figure 1As shown, a full-power wind turbine group network control method is provided. This embodiment is illustrated by applying the method to a terminal. The terminal is used to control a full-power wind turbine group, wherein the full-power wind turbine group may be a full-power wind turbine group composed of a permanent magnet wind turbine connected to a power grid and a back-to-back converter; the terminal may be a personal computer, a laptop computer, a smart phone, a tablet computer, etc. In this embodiment, the method includes the following steps:

[0061] Step S101 , performing proportional link processing and series lead correction link processing on a DC capacitor voltage given value and a DC capacitor voltage feedback amount of a full-power wind turbine generator set to obtain an output frequency of the full-power wind turbine generator set.

[0062] The DC capacitor voltage given value refers to the DC capacitor voltage required to be achieved according to relevant regulations. The DC capacitor voltage feedback refers to the DC capacitor voltage measured in the actual circuit.

[0063] Specifically, the terminal can input the DC capacitor voltage set value and the DC capacitor voltage feedback of the full-power wind turbine into the DC voltage synchronous control model of the wind turbine to output the output frequency of the full-power wind turbine through the DC voltage synchronous control model. The DC voltage synchronous control model is constructed by proportional link processing and series lead correction link processing.

[0064] Step S102, based on the output frequency, introduces the value of the reactive power deviation after passing through the first high-pass filter into the DC voltage control loop of the full-power wind turbine set, and outputs the grid-side converter output frequency of the full-power wind turbine set; the reactive power deviation is obtained according to the reactive power given value and reactive power of the full-power wind turbine set.

[0065] Among them, the reactive power set value refers to the reactive power that needs to be achieved according to relevant regulations.

[0066] Specifically, the terminal obtains the reactive power deviation based on the difference between the reactive power set value and the reactive power of the full-power wind turbine set; then the output frequency and the value of the reactive power deviation after passing through the first high-pass filter are input into the active and reactive power decoupling control model of DC voltage compensation based on reactive feedforward, and the output frequency of the grid-side converter of the full-power wind turbine set is obtained.

[0067] Step S103, the frequency difference between the grid-side converter output frequency after passing through the second high-pass filter and the reference frequency of the full-power wind turbine generator set is introduced into the feedback loop of the DC voltage synchronous control of the full-power wind turbine generator set to obtain the frequency deviation of the full-power wind turbine generator set.

[0068] Furthermore, the terminal can also obtain the grid-side converter angle θ of the wind turbine according to the output frequency and the grid angular frequency of the wind turbine, which is used as the orientation angle used for coordinate transformation of grid-side physical quantities.

[0069] In practical applications, the frequency deviation and grid-side converter angle of a full-power wind turbine can be obtained by the following formula (1):

[0070] (1)

[0071] Where Δω1 represents the frequency deviation; B m , m1, m2 are the parameters of the second high-pass filter, and the corresponding parameters can be set according to different scenarios; ω represents the grid-side converter output frequency; ω ref Indicates the frequency difference; is the grid angular frequency, θ is the output grid-side converter angle; s represents the Laplace operator.

[0072] Step S104, performing grid control on the full-power wind turbine according to the grid-side modulation voltage instruction and the machine-side modulation voltage instruction of the full-power wind turbine, as well as the frequency deviation; the grid-side modulation voltage instruction is obtained according to the output frequency of the grid-side converter; the machine-side modulation voltage instruction is obtained according to the stator current of the full-power wind turbine.

[0073] Specifically, the terminal calculates the grid-side modulation voltage command according to the output frequency of the grid-side converter; calculates the machine-side modulation voltage command according to the stator current of the full-power wind turbine; modulates the grid-side modulation voltage command and the machine-side modulation voltage command through coordinate transformation and space vector pulse width modulation (SVPWM) links, and then outputs a switch tube drive signal to control the grid-side converter and the machine-side converter, thereby realizing full-power wind turbine group network control with DC voltage synchronous control with power decoupling and frequency deviation optimization.

[0074] In the above-mentioned full-power wind turbine grid control method, the output frequency of the full-power wind turbine can be optimized through the proportional link and the series lead correction link, providing better frequency support for the power grid, thereby improving the stability of the full-power wind turbine when connected to the grid for power generation; by introducing the reactive power deviation into the DC voltage control loop through a high-pass filter, DC voltage compensation of reactive feedforward is realized; by using the frequency deviation to optimize the DC voltage synchronous control, the stability of the wind turbine during grid frequency disturbances is further enhanced, greatly improving the stability of the grid control of the full-power wind turbine.

[0075] In one embodiment, Figure 2As shown, the above step S101 performs proportional link processing and series lead correction link processing on the DC capacitor voltage given value and the DC capacitor voltage feedback of the full-power wind turbine generator set to obtain the output frequency of the full-power wind turbine generator set, which specifically includes the following contents:

[0076] Step S201, performing proportional link processing on the difference between the DC capacitor voltage set value and the DC capacitor voltage feedback value to obtain first data.

[0077] Step S202, performing a series advance correction link process on the first data to obtain second data.

[0078] Step S203: obtaining the output frequency of the full-power wind turbine generator set according to the sum of the second data and the reference frequency of the full-power wind turbine generator set.

[0079] Specifically, the terminal uses the DC voltage synchronous control model to process and obtain the output frequency. Figure 3 The structure diagram of DC voltage synchronization control with power decoupling and frequency deviation optimization is shown in Figure 2. Figure 3 As shown in the figure, the output frequency processing process is to first make a difference between the DC capacitor voltage set value and the DC capacitor voltage feedback value, then process it through the proportional link and the series lead correction link, and finally add it to the reference frequency to output the output frequency of the full-power wind turbine. In practical applications, the output frequency can be obtained by the following formula (2):

[0080] (2)

[0081] In the formula, Indicates the given value of DC capacitor voltage; V dc Indicates the DC capacitor voltage feedback; K p is the proportional coefficient of the proportional link, a and T are the parameters of the series lead correction link, and s represents the Laplace operator. dc From the measurement, , , K p , a, and T are setting coefficients, and corresponding coefficients can be set according to different scenarios.

[0082] In this embodiment, the output frequency of the full-power wind turbine is optimized through the proportional link and the series advance correction link, providing better frequency support for the power grid, thereby improving the stability of the full-power wind turbine when connected to the grid for power generation.

[0083] In one embodiment, the above step S102, based on the output frequency, introduces the reactive power deviation into the DC voltage control loop of the full-power wind turbine through the first high-pass filter, and outputs the grid-side converter output frequency of the full-power wind turbine, specifically including the following contents: performing high-pass filtering on the reactive power deviation through the first high-pass filter to obtain third data; obtaining the grid-side converter output frequency according to the difference between the output frequency and the third data.

[0084] Specifically, the terminal uses the active and reactive power decoupling control model of DC voltage compensation based on reactive feedforward to obtain the grid-side converter output frequency. The processing process of the grid-side converter output frequency is to firstly make a difference between the reactive power given value and the reactive power, then use the first high-pass filter to perform a high-pass filter link to obtain the third data, and finally make a difference between the output frequency and the third data. In practical applications, the grid-side converter output frequency can be obtained by the following formula (3):

[0085] (4)

[0086] Where, Q ref Indicates the reactive power given value, Q ref is the setting coefficient; Q represents reactive power, which is calculated from power; A m , n1, n2 are the parameters of the first high-pass filter; Q ref , A m , n1, n2 can be designed with corresponding coefficients or parameters according to different scenarios.

[0087] In this embodiment, the reactive power deviation is introduced into the DC voltage control loop through a high-pass filter, so that the DC voltage fluctuation caused by the coupling effect can be reduced.

[0088] In one embodiment, in the above step S104, before the full-power wind turbine is controlled to form a grid according to the grid-side modulation voltage instruction and the machine-side modulation voltage instruction of the full-power wind turbine, as well as the frequency deviation, the method further includes: obtaining the reactive power of the back-to-back converter in the full-power wind turbine according to the d-axis voltage component and the q-axis voltage component of the grid-side connection point voltage of the full-power wind turbine in the synchronous rotating coordinate system, and the d-axis current component and the q-axis current component of the grid-side inductor current of the full-power wind turbine in the synchronous rotating coordinate system; inputting the reactive power into the reactive AC voltage loop model of the full-power wind turbine to obtain the AC voltage amplitude of the full-power wind turbine; the reactive AC voltage loop model is constructed according to the proportional coefficient and the integral coefficient of the preset reactive loop proportional-integral regulator; inputting the difference between the target parameter and the q-axis voltage component and the difference between the AC voltage amplitude and the d-axis voltage component into the voltage-current dual closed loop of the full-power wind turbine to obtain the grid-side modulation voltage instruction.

[0089] Specifically, the terminal is connected to the stator three-phase current i of the permanent magnet wind generator in the full-power wind turbine group. sa 、i sb 、i sc The coordinate transformation is performed to obtain the d-axis current component i of the stator three-phase current of the permanent magnet wind generator in the synchronous rotating coordinate system. sd , q-axis current component i sq . The grid-side inductor current i of the wind turbine a 、i b 、i c Perform coordinate transformation to obtain the d-axis current component i of the grid-side inductor current in the synchronous rotating coordinate system. d , q-axis current component i q . Grid-side grid connection point voltage u a 、u b 、u c Perform coordinate transformation to obtain the d-axis voltage component u of the grid-connected point voltage in the synchronous rotating coordinate system. d , q-axis voltage component u q In practical applications, the coordinate transformation process can be processed by matrix operations as shown in formula (5):

[0090] (5)

[0091] In the formula, is the orientation angle of coordinate transformation: when calculating the physical quantity on the grid side, it is replaced by the grid-side converter angle θ; when calculating the physical quantity on the machine side, it is replaced by the machine-side converter angle θ s .x a、 x b、 x cRepresents the physical quantities in the three-phase stationary coordinate system, represents the d-axis DC component and q-axis DC component of each physical quantity in the synchronous rotating coordinate system. When calculating, x is used to represent each physical quantity such as the stator three-phase current i s , the grid-side inductor current i, and the grid-side grid-connected point voltage u. Among them, the machine-side converter angle represents the orientation angle used when the machine-side physical quantity is transformed into coordinates.

[0092] The terminal is based on the d-axis voltage component u of the grid-connected point voltage in the synchronous rotating coordinate system d , q-axis voltage component u q , and the d-axis current component i of the grid-side inductor current in the synchronous rotating coordinate system d , q-axis current component i q , the active power and reactive power of the back-to-back converter in the full-power wind turbine are calculated. The active power P and reactive power Q can be obtained by the following formula (6):

[0093] (6)

[0094] Figure 4 This is the reactive power-AC voltage control structure diagram. Figure 4 As shown, the terminal inputs the reactive power into the reactive AC voltage loop model of the full-power wind turbine to obtain the AC voltage amplitude of the full-power wind turbine. The reactive AC voltage loop model can be expressed by the following formula (7):

[0095] (7)

[0096] In the formula, U represents the AC voltage amplitude; is the voltage reference value, is the reactive power reference value, K Qp and K Qi is the proportional coefficient and integral coefficient of the reactive loop proportional integral regulator. Qp , K Qi , , It is a setting coefficient, and the corresponding coefficient can be designed according to different scenarios.

[0097] Figure 5 This is the voltage and current double closed-loop control structure diagram. Figure 5 As shown, the terminal converts the target parameter (e.g., 0) to the q-axis voltage component u of the grid-connected point voltage in the synchronous rotating coordinate system. q The difference between the AC voltage amplitude and the d-axis voltage component u of the grid-connected point voltage in the synchronous rotating coordinate system dThe difference between them is input into the voltage and current double closed loop of the full-power wind turbine to obtain the grid-side modulation voltage instruction u td 、u tq Grid-side modulation voltage command u td 、u tq It can be obtained by the following formula (8):

[0098] (8)

[0099] In the formula, is the grid-side converter output frequency, K pi and K ii K is the proportional coefficient and integral coefficient of the current loop proportional integral regulator. pu and K iu is the proportional coefficient and integral coefficient of the voltage loop proportional-integral regulator, L f is the filter inductor inductance, C f is the capacitance value of the filter capacitor. f , C f , 、u d 、u q 、i d 、i q From the measurement, K pi , K ii , K pu , K iu It is a setting coefficient, and the corresponding coefficient can be designed according to different systems.

[0100] In this embodiment, the AC voltage amplitude is obtained through reactive power and AC voltage control, and the deviation between the AC voltage amplitude and feedback is sent to the voltage-current double closed loop, thereby realizing the reasonable acquisition of the grid-side modulation voltage instruction.

[0101] In one embodiment, in the above step S104, before the full-power wind turbine is controlled to form a network according to the grid-side modulation voltage instruction and the machine-side modulation voltage instruction of the full-power wind turbine, as well as the frequency deviation, it also includes: obtaining the d-axis current component and the q-axis current component of the stator current of the permanent magnet wind turbine in the full-power wind turbine; inputting the d-axis current component and the q-axis current component into the current closed loop of the full-power wind turbine to obtain the machine-side modulation voltage instruction.

[0102] Specifically, Figure 6 This is the structure diagram of the closed-loop control of the current on the generator side. Figure 6 As shown in the figure, the terminal converts the d-axis current component i of the stator three-phase current of the permanent magnet wind generator in the synchronous rotating coordinate system sd , q-axis current component i sq, input into the current closed loop of the full-power wind turbine to obtain the machine-side modulation voltage instruction u sd 、u sq . Machine side modulation voltage command u sd 、u sq It can be obtained by the following formula (9):

[0103] (9)

[0104] In the formula, is the rotor space electrical angular frequency, K pi1 and K ii1 L is the proportional coefficient and integral coefficient of the proportional-integral regulator of the machine-side current loop. sd、 L sq is the inductance value of the fan stator inductance under the dq axis, is the fan rotor flux. sd , L sq , 、i sd 、i sq , From the measurement, K pi1 , K ii1 , , It is a setting coefficient, and the corresponding coefficient can be designed according to different scenarios.

[0105] In this embodiment, the d-axis current component and the q-axis current component of the three-phase stator current of the permanent magnet wind generator in the synchronous rotating coordinate system are fed into the current closed loop, thereby realizing the reasonable acquisition of the machine-side modulation voltage command.

[0106] In one embodiment, the above step S104, according to the grid-side modulation voltage instruction and the machine-side modulation voltage instruction of the full-power wind turbine set, and the frequency deviation, performs grid control on the full-power wind turbine set, specifically including the following contents: according to the grid-side converter angle, coordinate transformation processing and space vector pulse width modulation processing are performed on the grid-side modulation voltage instruction and the machine-side modulation voltage instruction to obtain the switch tube drive signal of the full-power wind turbine set; based on the switch tube drive signal, the grid-side converter and the machine-side converter of the full-power wind turbine set are controlled, and according to the frequency deviation, the DC voltage synchronization control of the full-power wind turbine set is updated.

[0107] The frequency deviation is used to suppress the DC voltage fluctuation caused by the grid frequency disturbance.

[0108] Specifically, Figure 7 The control structure diagram of the full-power wind turbine network with DC voltage synchronization with power decoupling and frequency deviation optimization is shown. Figure 7As shown, the terminal performs coordinate transformation processing and SVPWM link on the grid-side modulation voltage command obtained in the voltage and current dual closed-loop control and the machine-side modulation voltage command obtained in the current closed-loop control according to the grid-side converter angle, and obtains the switch tube drive signal of the full-power wind turbine group; based on the switch tube drive signal, the grid-side converter and the machine-side converter of the full-power wind turbine group are controlled, and the DC voltage synchronous control of the full-power wind turbine group is updated according to the frequency deviation, and finally the full-power wind turbine group network control with DC voltage synchronous control with power decoupling and frequency deviation optimization is realized.

[0109] In this embodiment, a drive signal is generated through modulation to achieve grid control of full-power wind turbines with DC voltage synchronous control with power decoupling and frequency deviation optimization, better provide voltage and frequency support for the power grid, reduce DC voltage fluctuations caused by coupling effects, and improve the stability of full-power wind turbines under grid frequency disturbances.

[0110] In one embodiment, Figure 8 As shown, another full-power wind turbine network control method is provided, which is described by taking the method applied to a terminal as an example, and includes the following steps:

[0111] Step S801, performing proportional link processing and series lead correction link processing on the DC capacitor voltage given value and the DC capacitor voltage feedback amount of the full-power wind turbine generator set to obtain the output frequency of the full-power wind turbine generator set.

[0112] Step S802: Based on the output frequency, the value of the reactive power deviation after passing through the first high-pass filter is introduced into the DC voltage control loop of the full-power wind turbine generator set, and the grid-side converter output frequency of the full-power wind turbine generator set is output.

[0113] The reactive power deviation is obtained according to the reactive power given value and reactive power of the full-power wind turbine.

[0114] Step S803, the frequency difference between the grid-side converter output frequency after passing through the second high-pass filter and the reference frequency of the full-power wind turbine generator set is introduced into the feedback loop of the DC voltage synchronous control of the full-power wind turbine generator set to obtain the frequency deviation of the full-power wind turbine generator set.

[0115] Step S804, obtaining the reactive power of the back-to-back converter in the full-power wind turbine according to the d-axis voltage component and the q-axis voltage component of the grid-side connection point voltage of the full-power wind turbine in the synchronous rotating coordinate system, and the d-axis current component and the q-axis current component of the grid-side inductor current of the full-power wind turbine in the synchronous rotating coordinate system.

[0116] Step S805, inputting reactive power into the reactive AC voltage loop model of the full-power wind turbine to obtain the AC voltage amplitude of the full-power wind turbine; the reactive AC voltage loop model is constructed according to the proportional coefficient and integral coefficient of the preset reactive loop proportional-integral regulator.

[0117] Step S806, input the difference between the target parameter and the q-axis voltage component and the difference between the AC voltage amplitude and the d-axis voltage component into the voltage-current double closed loop of the full-power wind turbine to obtain a grid-side modulation voltage instruction.

[0118] Step S807, obtaining the d-axis current component and the q-axis current component of the stator current of the permanent magnet wind turbine in the full-power wind turbine; inputting the d-axis current component and the q-axis current component into the current closed loop of the full-power wind turbine to obtain a machine-side modulation voltage instruction.

[0119] Step S808, according to the grid-side converter angle, coordinate transformation processing and space vector pulse width modulation processing are performed on the grid-side modulation voltage command and the generator-side modulation voltage command to obtain a switch tube drive signal of the full-power wind turbine set.

[0120] Step S809, based on the switch tube driving signal, controlling the grid-side converter and the machine-side converter of the full-power wind turbine generator set, and updating the DC voltage synchronization control of the full-power wind turbine generator set according to the frequency deviation.

[0121] The above-mentioned full-power wind turbine grid control method can achieve the following beneficial effects: it can optimize the output frequency of the full-power wind turbine through the proportional link and the series lead correction link, provide better frequency support for the power grid, and thus improve the stability of the full-power wind turbine when connected to the grid for power generation; by introducing the reactive power deviation into the DC voltage control loop through a high-pass filter, DC voltage compensation of reactive feedforward is achieved; by optimizing the DC voltage synchronous control using the frequency deviation, the stability of the wind turbine during grid frequency disturbances is further enhanced, greatly improving the stability of the grid control of the full-power wind turbine.

[0122] In order to more clearly illustrate the full-power wind turbine network control method provided by the embodiment of the present disclosure, the full-power wind turbine network control method is specifically described below with a specific embodiment. Another full-power wind turbine network control method is provided, which can be applied to a terminal, and specifically includes the following contents:

[0123] Based on the synchronous output frequency through DC voltage, voltage and frequency support is provided for the power grid; the reactive power deviation is introduced into the DC voltage control loop through a high-pass filter to reduce the DC voltage fluctuation caused by the coupling effect; the difference between the output frequency after passing through the high-pass filter and the reference frequency is introduced into the DC voltage synchronous control, and the grid-side converter angle is output, thereby increasing the DC voltage stability under the grid frequency disturbance. The AC voltage amplitude is obtained through reactive power and AC voltage control. The deviation between the AC voltage amplitude and the feedback is sent to the voltage and current double closed loop, and the grid-side converter drive signal is generated after modulation. By sending the machine-side current reference value and the feedback value deviation into the current closed loop, the machine-side converter drive signal is generated after modulation, so as to realize the full-power wind turbine network control method with DC voltage synchronous control with power decoupling and frequency deviation optimization, better provide voltage and frequency support for the power grid, reduce the DC voltage fluctuation caused by the coupling effect, and improve the stability of the system under the grid frequency disturbance.

[0124] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0125] Based on the same inventive concept, the embodiment of the present application also provides a full-power wind turbine network control device for implementing the full-power wind turbine network control method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more embodiments of the full-power wind turbine network control device provided below can refer to the limitations of the full-power wind turbine network control method above, and will not be repeated here.

[0126] In one embodiment, Fig. 9 As shown, a full-power wind turbine network control device 900 is provided, comprising: a proportional link processing module 901, a voltage synchronization control module 902, a reactive power decoupling module 903 and a wind turbine network control module 904, wherein:

[0127] The proportional link processing module 901 is used to perform proportional link processing and series lead correction link processing on the DC capacitor voltage set value and the DC capacitor voltage feedback of the full-power wind turbine generator set to obtain the output frequency of the full-power wind turbine generator set.

[0128] The voltage synchronization control module 902 is used to introduce the value of the reactive power deviation after passing through the first high-pass filter into the DC voltage control loop of the full-power wind turbine group based on the output frequency, and output the grid-side converter output frequency of the full-power wind turbine group; the reactive power deviation is obtained according to the reactive power set value and reactive power of the full-power wind turbine group.

[0129] The reactive power decoupling module 903 is used to introduce the frequency difference between the grid-side converter output frequency after passing through the second high-pass filter and the reference frequency of the full-power wind turbine generator set into the feedback loop of the DC voltage synchronous control of the full-power wind turbine generator set to obtain the frequency deviation of the full-power wind turbine generator set.

[0130] The unit grid control module 904 is used to perform grid control on the full-power wind turbine according to the grid-side modulation voltage instruction and the machine-side modulation voltage instruction of the full-power wind turbine, as well as the frequency deviation; the grid-side modulation voltage instruction is obtained according to the output frequency of the grid-side converter; the machine-side modulation voltage instruction is obtained according to the stator current of the full-power wind turbine.

[0131] In one embodiment, the proportional link processing module 901 is also used to perform proportional link processing on the difference between the DC capacitor voltage set value and the DC capacitor voltage feedback value to obtain first data; perform series lead correction link processing on the first data to obtain second data; and obtain the output frequency of the full-power wind turbine generator set based on the sum of the second data and the reference frequency of the full-power wind turbine generator set.

[0132] In one embodiment, the voltage synchronization control module 902 is further used to perform a high-pass filtering process on the reactive power deviation through a first high-pass filter to obtain third data; and obtain the output frequency of the grid-side converter according to the difference between the output frequency and the third data.

[0133] In one embodiment, the full-power wind turbine network control device 900 also includes a first instruction output module, which is used to obtain the reactive power of the back-to-back converter in the full-power wind turbine according to the d-axis voltage component and the q-axis voltage component of the grid-side grid-connected point voltage of the full-power wind turbine in the synchronous rotating coordinate system, and the d-axis current component and the q-axis current component of the grid-side inductor current of the full-power wind turbine in the synchronous rotating coordinate system; the reactive power is input into the reactive AC voltage loop model of the full-power wind turbine to obtain the AC voltage amplitude of the full-power wind turbine; the reactive AC voltage loop model is constructed according to the proportional coefficient and the integral coefficient of the preset reactive loop proportional-integral regulator; the difference between the target parameter and the q-axis voltage component and the difference between the AC voltage amplitude and the d-axis voltage component are input into the voltage-current dual closed loop of the full-power wind turbine to obtain the grid-side modulation voltage instruction.

[0134] In one embodiment, the full-power wind turbine group network control device 900 also includes a second instruction output module, which is used to obtain the d-axis current component and the q-axis current component of the stator current of the permanent magnet wind turbine in the full-power wind turbine group; the d-axis current component and the q-axis current component are input into the current closed loop of the full-power wind turbine group to obtain a machine-side modulation voltage instruction.

[0135] In one embodiment, the unit grid control module 904 is also used to perform coordinate transformation processing and space vector pulse width modulation processing on the grid-side modulation voltage instruction and the machine-side modulation voltage instruction according to the grid-side converter angle to obtain the switch tube drive signal of the full-power wind turbine unit; based on the switch tube drive signal, control the grid-side converter and the machine-side converter of the full-power wind turbine unit, and update the DC voltage synchronization control of the full-power wind turbine unit according to the frequency deviation.

[0136] Each module in the above-mentioned full-power wind turbine network control device can be fully or partially implemented by software, hardware and their combination. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the corresponding operations of the above modules.

[0137] In one embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as follows: Fig.10As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, a full-power wind turbine structure network control method is realized. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0138] Those skilled in the art will understand that Fig.10 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0139] In one embodiment, a computer device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above method embodiments when executing the computer program.

[0140] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0141] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0142] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0143] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0144] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the present application. It should be noted that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A full-power wind turbine network control method, characterized in that: The method comprises: Performing proportional link processing and series lead correction link processing on a given value of a DC capacitor voltage and a feedback amount of a DC capacitor voltage of a full-power wind turbine generator set to obtain an output frequency of the full-power wind turbine generator set; Based on the output frequency, the value of the reactive power deviation after passing through the first high-pass filter is introduced into the DC voltage control loop of the full-power wind turbine generator set, and the grid-side converter output frequency of the full-power wind turbine generator set is output; the reactive power deviation is obtained according to the reactive power given value and reactive power of the full-power wind turbine generator set; The frequency difference between the grid-side converter output frequency after passing through the second high-pass filter and the reference frequency of the full-power wind turbine generator set is introduced into the feedback loop of the DC voltage synchronous control of the full-power wind turbine generator set to obtain the frequency deviation of the full-power wind turbine generator set; The full-power wind turbine is controlled to form a grid according to the grid-side modulation voltage instruction and the machine-side modulation voltage instruction of the full-power wind turbine, as well as the frequency deviation; the grid-side modulation voltage instruction is obtained according to the output frequency of the grid-side converter; the machine-side modulation voltage instruction is obtained according to the stator current of the full-power wind turbine.

2. The method according to claim 1, characterized in that The step of performing proportional link processing and series lead correction link processing on the DC capacitor voltage given value and the DC capacitor voltage feedback amount of the full-power wind turbine generator set to obtain the output frequency of the full-power wind turbine generator set includes: Performing proportional link processing on the difference between the DC capacitor voltage given value and the DC capacitor voltage feedback amount to obtain first data; Performing a series advance correction process on the first data to obtain second data; The output frequency of the full-power wind turbine generator set is obtained according to the sum of the second data and the reference frequency of the full-power wind turbine generator set.

3. The method according to claim 1, characterized in that The method of introducing the value of the reactive power deviation after passing through the first high-pass filter into the DC voltage control loop of the full-power wind turbine generator set based on the output frequency, and outputting the grid-side converter output frequency of the full-power wind turbine generator set comprises: Performing high-pass filtering on the reactive power deviation through the first high-pass filter to obtain third data; The output frequency of the grid-side converter is obtained according to the difference between the output frequency and the third data.

4. The method according to claim 1, characterized in that: Before performing grid control on the full-power wind turbine generator set according to the grid-side modulation voltage instruction and the machine-side modulation voltage instruction of the full-power wind turbine generator set and the frequency deviation, the method further includes: According to the d-axis voltage component and the q-axis voltage component of the grid-side connection point voltage of the full-power wind turbine generator set in a synchronous rotating coordinate system, and the d-axis current component and the q-axis current component of the grid-side inductor current of the full-power wind turbine generator set in a synchronous rotating coordinate system, the reactive power of the back-to-back converter in the full-power wind turbine generator set is obtained; The reactive power is input into the reactive AC voltage loop model of the full-power wind turbine to obtain the AC voltage amplitude of the full-power wind turbine; the reactive AC voltage loop model is constructed according to the proportional coefficient and integral coefficient of the preset reactive loop proportional-integral regulator; The difference between the target parameter and the q-axis voltage component and the difference between the AC voltage amplitude and the d-axis voltage component are input into the voltage-current double closed loop of the full-power wind turbine generator set to obtain the grid-side modulation voltage instruction.

5. The method according to claim 1, characterized in that Before performing grid control on the full-power wind turbine generator set according to the grid-side modulation voltage instruction and the machine-side modulation voltage instruction of the full-power wind turbine generator set and the frequency deviation, the method further includes: Obtaining a d-axis current component and a q-axis current component of a stator current of a permanent magnet wind generator in the full-power wind turbine generator set; The d-axis current component and the q-axis current component are input into the current closed loop of the full-power wind turbine generator set to obtain the machine-side modulation voltage instruction.

6. The method according to any one of claims 4 or 5, characterized in that: The grid-building control of the full-power wind turbine generator set is performed according to the grid-side modulation voltage instruction and the machine-side modulation voltage instruction of the full-power wind turbine generator set, and the frequency deviation, including: According to the grid-side converter angle, coordinate transformation processing and space vector pulse width modulation processing are performed on the grid-side modulation voltage command and the generator-side modulation voltage command to obtain a switch tube drive signal of the full-power wind turbine generator set; Based on the switch tube driving signal, the grid-side converter and the machine-side converter of the full-power wind turbine are controlled, and according to the frequency deviation, the DC voltage synchronization control of the full-power wind turbine is updated.

7. A full-power wind turbine network control device, characterized in that: The device comprises: A proportional link processing module, used for performing proportional link processing and series lead correction link processing on a DC capacitor voltage given value and a DC capacitor voltage feedback amount of a full-power wind turbine generator set to obtain an output frequency of the full-power wind turbine generator set; A voltage synchronization control module is used to introduce the value of the reactive power deviation after passing through the first high-pass filter into the DC voltage control loop of the full-power wind turbine generator set based on the output frequency, and output the grid-side converter output frequency of the full-power wind turbine generator set; the reactive power deviation is obtained according to the reactive power given value and reactive power of the full-power wind turbine generator set; A reactive power decoupling module is used to introduce the frequency difference between the grid-side converter output frequency after passing through the second high-pass filter and the reference frequency of the full-power wind turbine generator set into the feedback loop of the DC voltage synchronous control of the full-power wind turbine generator set to obtain the frequency deviation of the full-power wind turbine generator set; The unit network control module is used to perform network control on the full-power wind turbine unit according to the grid-side modulation voltage instruction and the machine-side modulation voltage instruction of the full-power wind turbine unit, and the frequency deviation; the grid-side modulation voltage instruction is obtained according to the output frequency of the grid-side converter; the machine-side modulation voltage instruction is obtained according to the stator current of the full-power wind turbine unit.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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