A fast response method and device for a new energy power generation unit converter

Abstract

The present invention discloses a rapid response method and device for a new energy power generation unit converter, which belongs to the field of new energy power generation technology. The rapid response method comprises: obtaining an outer loop control parameter by utilizing the difference between a power command value and an actual power value of the new energy power generation unit converter to control the outer loop controller to obtain an outer loop output; characterizing an inner loop feedforward by utilizing the product of the output current of the new energy power generation unit converter and an adaptive feedforward coefficient; inputting the outer loop output and the inner loop feedforward into the inner loop controller together, adding the inner loop feedforward to the outer loop output, and superimposing the control of the two to improve the response speed, wherein the inner loop feedforward is characterized by utilizing the product of the output current of the new energy power generation unit converter and an adaptive feedforward coefficient, which can avoid overshoot; therefore, it is possible to take into account the contradiction between response speed and overshoot, and accelerate the response of the new energy power generation unit converter while avoiding overshoot.

Description

Technical Field

[0001] The present invention belongs to the technical field of renewable energy power generation, and more specifically, relates to a rapid response method and device for a renewable energy power generation unit converter. Background Art

[0002] In recent years, wind and solar power generation has become a hot topic in renewable energy. Many countries, including my country, require wind and solar power generation units to have rapid frequency and reactive power response capabilities to quickly support the grid when frequency or voltage events occur. Renewable energy generation units, such as wind and solar, are typically connected to the AC grid through power electronic converters to achieve synchronized operation with the grid. As the proportion of renewable energy continues to increase, grid inertia is rapidly decreasing, and frequency and voltage events are developing rapidly, placing higher demands on converter response speed to quickly adjust active and reactive power to support the grid.

[0003] Most existing converters for renewable energy power generation units utilize dual closed-loop vector control, a control scheme with an outer voltage or power loop and an inner current loop. Both loops employ feedback control to track the command value. Controller acceleration methods can be broadly categorized into two types: First, directly modifying the controller topology, such as single-loop control, reduces the action time of one loop. However, this approach suffers from poor stability and difficulty suppressing overcurrent. It also conflicts with the existing mainstream dual closed-loop vector control architecture, resulting in high retrofit costs for existing converter control and questionable applicability of emerging advanced algorithms. Second, supplementing dual closed-loop vector control with additional control or optimizing PI parameters. Mainstream methods include adaptive PI control and feedforward control. Increasing the proportional parameter and decreasing the integral parameter is the simplest method for improving controller response speed, but this can lead to overshoot and compromised system stability. Feedforward control effectively accelerates the controller without compromising system stability, but excessive feedforward can cause overshoot, while too little can slow response.

[0004] That is, it is difficult for existing converters of new energy power generation units to balance the contradiction between response speed and overshoot, and to accelerate the response of the controller while avoiding overshoot. Summary of the Invention

[0005] In response to the above-mentioned defects or improvement needs of the prior art, the present invention provides a rapid response method and device for a new energy power generation unit converter, which aims to solve the technical problem that the existing new energy power generation unit converter is difficult to balance the contradiction between response speed and overshoot, and cannot accelerate the response of the controller while avoiding overshoot.

[0006] To achieve the above objectives, according to one aspect of the present invention, a rapid response method for a new energy power generation unit converter is provided, comprising:

[0007] S1: Obtain outer loop control parameters using the difference between the power command value and the actual power value of the new energy power generation unit converter;

[0008] S2: Inputting the outer loop control parameters into the outer loop controller in the converter of the new energy power generation unit to obtain the outer loop output;

[0009] S3: using the product of the output current of the new energy power generation unit converter and the adaptive feedforward coefficient to represent the inner loop feedforward amount;

[0010] S4: Inputting the outer loop output and the inner loop feedforward into an inner loop controller in the new energy power generation unit converter, so that the new energy power generation unit converter can achieve rapid response.

[0011] Furthermore, the power command value is an active power command, and the response method includes:

[0012] S1: Using the active power command value P of the new energy power generation unit converter eref and the actual value of active power P s The difference between and obtains the first outer loop control parameter;

[0013] S2: controlling the active outer loop controller in the outer loop controller using the first outer loop control parameter to obtain a first outer loop output;

[0014] S3: Using the active current and active adaptive feedforward coefficient k of the new energy power generation unit converter df The product of represents the first inner loop feedforward;

[0015] S4: Inputting the first outer loop output and the first inner loop feedforward into the inner loop controller to achieve a fast frequency response of the new energy power generation unit converter.

[0016] Further, using Calculate the active adaptive feedforward coefficient k df ; Among them, Δf is the absolute value of the deviation between the actual frequency value and the steady-state frequency, f th is the grid-connected bus frequency deviation threshold, k df1 is the first fixed coefficient, k df2 is the first dynamic coefficient.

[0017] Furthermore, by solving the equation Determine the first fixed coefficient k df1 and the first dynamic coefficient k df2 The value range of S c is the converter capacity.

[0018] Furthermore, the power command value is a reactive power command; and the response method includes:

[0019] S1: Using the reactive power command value Q of the new energy power generation unit converter eref and the actual value of reactive power Q s The difference between and obtains the second outer loop control parameter;

[0020] S2: controlling the reactive outer loop controller in the outer loop controller using the second outer loop control parameter to obtain a second outer loop output;

[0021] S3: Utilize the reactive current I of the new energy power generation unit converter q and reactive adaptive feedforward coefficient k df The product of represents the second inner loop feedforward;

[0022] S4: Inputting the second outer loop output and the second inner loop feedforward into the inner loop controller to achieve a fast reactive response of the new energy power generation unit converter.

[0023] Further, using Calculate the reactive adaptive feedforward coefficient k qf ;

[0024] Among them, ΔU is the absolute value of the deviation between the actual value of the grid-connected bus voltage and the steady-state voltage, U th is the deviation threshold; k qf1 is the second fixed coefficient, k qf2 is the second dynamic coefficient.

[0025] Furthermore, by solving the equation Determine the second fixed coefficient k qf1 and the second dynamic coefficient k qf2 The value range of S c is the converter capacity.

[0026] Furthermore, the outer loop controller is a proportional-integral controller, and S1 includes:

[0027] Calculating the difference between the power command value and the actual power value of the new energy power generation unit converter;

[0028] The difference and its corresponding rate of change are input into a fuzzy controller so that the fuzzy controller outputs the outer loop control parameters, where the outer loop control parameters include a proportional coefficient and an integral coefficient.

[0029] According to another aspect of the present invention, a fast response device for a new energy power generation unit converter is provided, comprising:

[0030] An acquisition module is used to obtain outer loop control parameters using the difference between the power command value and the actual power value of the new energy power generation unit converter;

[0031] An input module, configured to input the outer loop control parameters into an outer loop controller in a converter of a new energy power generation unit to obtain an outer loop output;

[0032] a characterization module, configured to characterize an inner loop feedforward amount by multiplying an output current of the new energy power generation unit converter by an adaptive feedforward coefficient;

[0033] The control module is used to input the outer loop output and the inner loop feedforward into the inner loop controller in the new energy power generation unit converter, so that the new energy power generation unit converter can achieve rapid response.

[0034] According to another aspect of the present invention, a power generation control system is provided, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the response method when executing the computer program.

[0035] According to another aspect of the present invention, 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 of the response method are implemented.

[0036] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0037] (1) The present invention provides a fast response method for a new energy power generation unit converter, which uses the product of the output current of the new energy power generation unit converter and an adaptive feedforward coefficient to represent the inner loop feedforward amount; the outer loop output and the inner loop feedforward amount are input together into the inner loop controller in the new energy power generation unit converter, and the inner loop feedforward amount is added to the outer loop output, and the superposition control of the two can improve the response speed, wherein the inner loop feedforward amount is represented by the product of the output current of the new energy power generation unit converter and an adaptive feedforward coefficient, which can avoid overshoot; therefore, it can take into account the contradiction between response speed and overshoot, and accelerate the response of the new energy power generation unit converter while avoiding overshoot.

[0038] (2) In this solution, the power command value is an active power command, and the active power command value P of the converter of the new energy power generation unit is used. eref and the actual value of active power P s The difference between the active power and the active power is used to obtain the outer loop control quantity corresponding to the active power, and the active power adaptive feedforward coefficient k of the new energy power generation unit converter is used to obtain the active power corresponding to the outer loop control quantity. dfThe product of represents the active current corresponding to the inner loop feedforward quantity; the outer loop control quantity corresponding to the active power and the inner loop feedforward quantity are input into the inner loop controller together, which can realize the fast frequency response of the converter of the new energy power generation unit. d The advantages of using it as a feedforward quantity are: ① its changes can quickly reflect on the controlled object; ② I d Abnormal fluctuations can be quickly suppressed through the feedback control of the outer loop controller; ③ There is no need to change the inner loop control framework, and it is adaptable to various existing advanced control systems.

[0039] (3) Since I d The change amplitude is small, and the weak disturbance needs to be quickly suppressed by the negative feedback of the outer loop controller; in transient state, I d The change range is large, and excessive feedforward input is prone to overshoot, which needs to be avoided. Calculate the active adaptive feedforward coefficient k df ; Introduce adaptive coefficient k df It can realize adaptive change according to the difference between the active power command value and the actual value during the frequency response process.

[0040] (4) This plan is passed Determine the first fixed coefficient k df1 and the first dynamic coefficient k df2 The value range can ensure that ① the switching time between steady state and transient state, k df The change range does not exceed the safe range; ② Comply with the over-current limit of the converter. Under normal circumstances, P eref <1.2pu, Q eref <1.2pu; ③Fixed coefficient k df1 Close to the steady-state value to ensure that small disturbances can be better suppressed after tracking is completed during the transient period.

[0041] (5) In this solution, the power command value is a reactive power command. The difference between the reactive power command value and the actual reactive power value of the new energy power generation unit converter is used to obtain the outer loop control quantity corresponding to the reactive power. The reactive current of the new energy power generation unit converter and the reactive adaptive feedforward coefficient k are used. qf The product of represents the reactive power corresponding inner loop feedforward quantity; the outer loop control quantity corresponding to the reactive power and the inner loop feedforward quantity are input into the inner loop controller together, so as to realize the fast reactive power response of the converter of the new energy power generation unit. q The advantages of using it as a feedforward quantity are: ① its changes can quickly reflect on the controlled object; ② I q Abnormal fluctuations can be quickly suppressed through the feedback control of the outer loop controller; ③ There is no need to change the inner loop control framework, and it is adaptable to various existing advanced control systems.

[0042] (6) Since I q The change amplitude is small, and the weak disturbance needs to be quickly suppressed by the negative feedback of the outer loop controller; in transient state, I q The change range is large, and excessive feedforward input is prone to overshoot, which needs to be avoided. Calculate the reactive adaptive feedforward coefficient k qf ; Introduce adaptive coefficient k qf It can realize adaptive change according to the difference between reactive power command value and actual value during reactive power response process.

[0043] (7) This plan is passed Determine the second fixed coefficient k qf1 and the second dynamic coefficient k qf2 The value range can ensure that ① the switching time between steady state and transient state, k qf There is no significant mutation, that is, k qf The change range does not exceed the safe range; ② Comply with the over-current limit of the converter. Under normal circumstances, P eref <1.2pu, Q eref <1.2pu; ③Fixed coefficient k qf1 Close to the steady-state value to ensure that small disturbances can be better suppressed after tracking is completed during the transient period.

[0044] (8) The advantages of this scheme through the design of fuzzy PI control are: ① When the actual value is far away from the command value, a large k dp or k qp Speed ​​up the response, and when approaching the stable point, by reducing k dp or k qp , which can not only improve the stability but also reduce the output overshoot, k dp or k qp The value of increases or decreases with the increase or decrease of the absolute value of the difference between the power command and the actual value and its rate of change; ② When the absolute value of the difference between the power command and the actual value is too large, in order to prevent the adjustment time from being too long and affecting the transient performance of the system, k di or k qi should become smaller; and when it approaches the instruction value, k di or k qi The value of k should be large, and the static error should be removed as much as possible to ensure the output accuracy. di or k qi The value of is opposite to the change of the absolute value of the difference between the power command and the actual value and its rate of change. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a flow chart of a rapid response method for a new energy power generation unit converter provided in Example 1 of the present invention.

[0046] Figure 2a A schematic diagram of fast frequency-reactive response control of a new energy power generation unit converter provided in Example 1 of the present invention.

[0047] Figure 2b This is a flow chart of a fast frequency response of a new energy power generation unit converter provided in Example 1 of the present invention.

[0048] Figure 2c This is a flow chart of a fast reactive power response of a new energy power generation unit converter provided in Example 1 of the present invention.

[0049] Figure 3 This is a structural diagram of a wind power grid-connected testing system provided in Example 1 of the present invention.

[0050] Figure 4 This is a schematic diagram of the fast frequency response results under the active power sudden increase condition provided by Example 1 of the present invention.

[0051] Figure 5 This is a schematic diagram of the fast frequency response results under the active power sudden drop condition provided by Example 1 of the present invention.

[0052] Figure 6 This is a schematic diagram of the fast reactive power response results under the reactive power sudden increase condition provided by Example 1 of the present invention.

[0053] Figure 7 This is a schematic diagram of the rapid reactive power response results under reactive power sudden drop conditions provided by Example 1 of the present invention. DETAILED DESCRIPTION

[0054] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0055] Example 1

[0056] like Figure 1As shown, this embodiment provides a rapid response method for a new energy power generation unit converter, including: S1: using the difference between the power command value and the actual power value of the new energy power generation unit converter to obtain the outer loop control parameter. S2: inputting the outer loop control parameter into the outer loop controller in the new energy power generation unit converter to obtain the outer loop output. S3: using the product of the output current of the new energy power generation unit converter and the adaptive feedforward coefficient to represent the inner loop feedforward. S4: inputting the outer loop output and the inner loop feedforward into the inner loop controller in the new energy power generation unit converter to enable the new energy power generation unit converter to achieve rapid response. The schematic diagram of the rapid frequency-reactive response control of the new energy power generation unit converter is shown in FIG. Figure 2a shown.

[0057] As a preferred embodiment, the grid-connected bus frequency value of the new energy power generation unit is detected in real time, and when the grid-connected bus frequency is not within the safety range formed by the first frequency threshold and the second frequency threshold, a fast frequency response is initiated. Figure 2b As shown, the response method includes: S1: using the active power command value P of the new energy power generation unit converter eref and the actual value of active power P s The first outer loop control parameter is obtained by the difference between the first outer loop control parameter and the active outer loop controller in the outer loop controller to obtain the first outer loop output. S3: The active current of the new energy power generation unit converter and the active adaptive feedforward coefficient k are used to calculate the active current of the new energy power generation unit converter and the active adaptive feedforward coefficient k. df The product of represents the first inner loop feedforward quantity; the feedforward quantity of active current adaptive feedforward control can be the converter active current I d and active adaptive feedforward coefficient k df The product of the active power and the active current can be multiplied by the active power output. A constant term, preset compensation term, etc. can also be added to this product. S4: The first outer-loop output and the first inner-loop feedforward are jointly input into the inner-loop controller to achieve a fast frequency response of the new energy power generation unit converter. That is, active current adaptive feedforward control is added to the output of the active power outer-loop PI control, and the output of the active power outer-loop PI control and the output of the active current adaptive feedforward control are used as the input of the inner-loop controller.

[0058] As a preferred embodiment, the Calculate the active adaptive feedforward coefficient k df Where Δf is the absolute value of the deviation between the actual frequency value and the steady-state frequency, f th is the grid-connected bus frequency deviation threshold, set to 0.004 pu, k df1 is the first fixed coefficient, k df2 is the first dynamic coefficient. In steady state, k df Designed to be 1; during transients, the dynamics in the adaptive coefficient decrease as the tracking state approaches.

[0059] As a preferred embodiment, by solving the equation Determine the first fixed coefficient k df1 and the first dynamic coefficient k df2 The value range of S c is the converter capacity. In actual engineering, better values ​​can be obtained through simulation.

[0060] As a preferred embodiment, the effective value of the grid-connected bus voltage of the new energy power generation unit is detected in real time, and when the grid-connected bus voltage is not within the safety range formed by the first voltage threshold and the second voltage threshold, a fast reactive power response is initiated. Figure 2c As shown, the response method includes: S1: using the reactive power command value Q of the new energy power generation unit converter eref and the actual value of reactive power Q s The difference between the two gets the second outer loop control parameter. S2: Use the second outer loop control parameter to control the reactive outer loop controller in the outer loop controller to get the second outer loop output. S3: Use the reactive current I q and reactive adaptive feedforward coefficient k df The product of represents the second inner loop feedforward quantity. The feedforward quantity of reactive current adaptive feedforward control can be the converter reactive current I q and reactive adaptive feedforward coefficient k qf The product of the second outer loop output and the second inner loop feedforward is multiplied by the second outer loop output. Constant terms, preset compensation terms, and the like may also be added to this product. S4: The second outer loop output and the second inner loop feedforward are jointly input into the inner loop controller to achieve a fast reactive power response for the new energy power generation unit converter. This is to add reactive current adaptive feedforward control to the output of the reactive outer loop PI control. The output of the reactive outer loop PI control and the output of the reactive current adaptive feedforward control are combined as the input to the inner loop controller.

[0061] As a preferred embodiment, the Calculate the reactive adaptive feedforward coefficient k qf Among them, ΔU is the absolute value of the deviation between the actual value of the grid-connected bus voltage and the steady-state voltage, U th is the deviation threshold, set to 0.005pu. qf1 is the second fixed coefficient, k qf2 is the second dynamic coefficient. In steady state, k qf Designed to be 1; during transients, the dynamics in the adaptive coefficient decrease as the tracking state approaches.

[0062] As a preferred embodiment, by solving the equation Determine the second fixed coefficient k qf1 and the second dynamic coefficient k qf2 The value range of Sc is the converter capacity. In actual engineering, better values ​​can be obtained through simulation.

[0063] In a preferred embodiment, the outer loop controller is a proportional-integral controller. S1 includes calculating the difference between the power command value and the actual power value of the new energy power generation unit converter. The difference and its corresponding rate of change are input into a fuzzy controller, which then outputs outer loop control parameters, including a proportional coefficient and an integral coefficient.

[0064] Specifically, when the fast frequency response is started, the active power instruction value P of the converter of the new energy power generation unit is eref With the actual value P s The absolute value of the difference and the rate of change of the absolute value of the difference are input into the active loop fuzzy controller. When the fast reactive response is started, according to the reactive instruction Q of the converter of the new energy power generation unit eref With the actual value Q s The absolute value of the difference and the rate of change of the absolute value of the difference are input into the reactive loop fuzzy controller. The active loop fuzzy controller outputs the active loop PI control parameter k dp 、k di , the reactive loop fuzzy controller outputs the reactive loop PI control parameter k qp 、k qi .

[0065] The fuzzy controller uses the domain of the fuzzy subsets E and EC, which represent the absolute value of the difference between the command value and the actual value, e, or the absolute value of the rate of change of the difference, ec, in the range [-11, 11]. The membership function for the input variables uses a Gaussian membership function. The membership function for the output variables uses a densely centered triangular membership function. The linguistic variables can take nine linguistic values: "Negative Large" (NB), "Negative Medium" (NM), "Negative Small" (NS), "Negative Small" (NE), "Zero" (ZO), "Positive Small" (PE), "Positive Small" (PS), "Positive Medium" (PM), and "Positive Large" (PB).

[0066] In order to verify the effectiveness of the method provided by the present invention, a wind power grid connection test system was built on the Matlab / Simulink platform, such as Figure 3 shown.

[0067] Simulation setting 1: A frequency drop event occurs at 10s, and the wind turbine active power command value jumps from 0.983 to 1.2pu. Three types of control are set: Control 1: The fast frequency-reactive power response method (AFC) of the new energy power generation unit converter provided by the present invention is adopted, and the classic PI debugging is determined to be k p0 =5, k i0 =1,k df1 =0.98, k df1=0.85; Control 2: conventional PI-conventional feedforward control (FC), k p =5, k i =1,k df =1; Control 3: conventional PI-no feedforward control (noFC), k p =5, k i =1,k df = 0. Under each control, the active output characteristics are as follows Figure 4 As shown in the figure, when active power increases, the fast frequency-reactive power response method for the new energy power generation unit converter provided by the present invention allows the active power to quickly track the command value without overshoot, and the adaptive coefficient value can change with the power tracking characteristics. Conventional PI-conventional feedforward control can also enable the active power to quickly track the command value, but it causes overshoot and increases the risk of converter overcurrent lockout. Using no feedforward control, that is, conventional dual-closed-loop vector control, significantly slows the active power response speed. At 100ms after the response, the change in the response does not reach 90% of the change in the command.

[0068] Simulation setting 2: A frequency rise event occurs at 10s, and the wind turbine active power command value drops from 0.983 to 0.8pu. Three types of control are set: Control 1: Using the new energy power generation unit converter fast frequency-reactive power response method (AFC) provided by the present invention, k df1 =0.98, k df1 =0.85; Control 2: conventional PI-conventional feedforward control (FC), k df =1; Control 3: conventional PI-no feedforward control (noFC), k df = 0. Under each control, the active output characteristics are as follows Figure 5 As shown in the figure, when active power decreases, the fast frequency-reactive power response method for the new energy power generation unit converter provided by the present invention allows the active power to quickly track the command value without overshoot, and the adaptive coefficient value can change with the power tracking characteristics. Conventional PI-conventional feedforward control can also enable the active power to quickly track the command value, but it causes overshoot, and the excessive reduction in active power affects economic efficiency. Using no feedforward control, that is, conventional dual-closed-loop vector control, significantly slows the active power response speed. At 100ms after the response, the change in the response does not reach 90% of the change in the command.

[0069] Simulation setting 3: At 10s, the wind turbine reactive power command value jumps from 0 to 0.8 pu. Set three types of control: Control 1: Adopt the fast frequency-reactive power response method (AFC) of the new energy power generation unit converter provided by the present invention, and the classic PI debugging is determined to be k p0 =5, k i0=1,k qf1 =0.985, k qf1 =0.845; using conventional PI-conventional feedforward control (FC), k p =5, k i =1,k qf =1; Control 3: conventional PI-no feedforward control (noFC), k p =5, k i =1,k qf = 0. Under each control, the active output characteristics are as follows Figure 6 As shown in the figure, it can be seen that when reactive power rises, after adopting the fast frequency-reactive power response method of the new energy power generation unit converter provided by the present invention, the active power can quickly track the command value without overshoot, and the adaptive coefficient value can change with the power tracking characteristics. Using conventional PI-conventional feedforward control, although it can also make the reactive power quickly track the command value, it causes overshoot and increases the risk of converter overcurrent lockout. Using no feedforward control, that is, conventional dual closed-loop vector control, the reactive power response speed is significantly slowed down. At 20ms after the response, the change in response does not reach 90% of the change in the command, which does not meet the response requirements.

[0070] Simulation setting 4: At 10s, the wind turbine reactive power command value jumps from 0 to 0.8 pu. Set three types of control: Control 1: Using the new energy power generation unit converter fast frequency-reactive power response method (AFC) provided by the present invention, k df1 =0.985, k df1 =0.845; Control 2: conventional PI-conventional feedforward control (FC), k df =1; Control 3: conventional PI-no feedforward control (noFC), k df = 0. Under each control, the reactive output characteristics are as follows Figure 7 As shown in the figure, when reactive power decreases, the method for fast frequency-reactive power response of the new energy power generation unit converter provided by the present invention allows the active power to quickly track the command value without overshoot, and the adaptive coefficient value can change with the power tracking characteristics. Conventional PI-conventional feedforward control can also enable reactive power to quickly track the command value, but it causes overshoot, which can easily lead to reactive power undercompensation. Using no feedforward control, i.e., conventional dual-closed-loop vector control, significantly slows the reactive power response speed. 20ms after the response, the change in the response does not reach 90% of the command change, failing to meet the response requirements.

[0071] In general, the fast frequency-reactive response method of the new energy power generation unit converter provided by the present invention can enable the actual active or reactive output of the converter to quickly track the command value, avoid overshoot, and greatly accelerate the response speed of the converter.

[0072] Example 2

[0073] This embodiment provides a rapid response device for a new energy power generation unit converter, comprising: an acquisition module, an input module, a characterization module, and a control module. The acquisition module is used to obtain outer loop control parameters using the difference between the power command value and the actual power value of the new energy power generation unit converter. The input module is used to input the outer loop control parameters into the outer loop controller in the new energy power generation unit converter to obtain the outer loop output. The characterization module is used to characterize the inner loop feedforward using the product of the output current of the new energy power generation unit converter and the adaptive feedforward coefficient. The control module is used to input the outer loop output and the inner loop feedforward into the inner loop controller in the new energy power generation unit converter to enable the new energy power generation unit converter to achieve rapid response.

[0074] Example 3

[0075] This embodiment provides a power generation control system, including a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the response method when executing the computer program.

[0076] Example 4

[0077] This embodiment provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the response method are implemented.

[0078] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rapid response method for a new energy power generation unit converter, characterized in that: include: S1: Obtain outer loop control parameters using the difference between the power command value and the actual power value of the new energy power generation unit converter; S2: Inputting the outer loop control parameters into the outer loop controller in the converter of the new energy power generation unit to obtain the outer loop output; S3: using the product of the output current of the new energy power generation unit converter and the adaptive feedforward coefficient to represent the inner loop feedforward amount; S4: inputting the outer loop output and the inner loop feedforward into an inner loop controller in the new energy power generation unit converter, so that the new energy power generation unit converter can achieve a fast response; When the power command value is an active power command, the response method includes: S1: using the active power command value P of the new energy power generation unit converter eref and the actual value of active power P s The first outer loop control parameter is obtained by the difference between the first outer loop control parameter and the active outer loop controller in the outer loop controller to obtain the first outer loop output; S3: The active current of the new energy power generation unit converter and the active adaptive feedforward coefficient k are used to obtain the first outer loop output. df The product of represents the first inner loop feedforward; S4: inputting the first outer loop output and the first inner loop feedforward into the inner loop controller to achieve a fast frequency response of the new energy power generation unit converter; When the power instruction value is a reactive power instruction, the response method includes: S1: using the reactive power instruction value Q of the new energy power generation unit converter eref and the actual value of reactive power Q s The difference between the two obtains the second outer loop control parameter; S2: using the second outer loop control parameter to control the reactive outer loop controller in the outer loop controller to obtain the second outer loop output; S3: using the reactive current I q and reactive adaptive feedforward coefficient k qf The product of represents the second inner loop feedforward quantity; S4: inputting the second outer loop output quantity and the second inner loop feedforward quantity into the inner loop controller to achieve a fast reactive response of the new energy power generation unit converter; use Calculate the active adaptive feedforward coefficient k df ; Δf is the absolute value of the deviation between the actual frequency value and the steady-state frequency, f th is the grid-connected bus frequency deviation threshold, k df1 is the first fixed coefficient, k df2 is the first dynamic coefficient; By solving the equation Determine the first fixed coefficient k df1 and the first dynamic coefficient k df2 The value range of S c is the converter capacity; use Calculate the reactive adaptive feedforward coefficient k qf ; ΔU is the absolute value of the deviation between the actual value of the grid-connected bus voltage and the steady-state voltage, U th is the deviation threshold; k qf1 is the second fixed coefficient, k qf2 is the second dynamic coefficient; By solving the equation Determine the second fixed coefficient k qf1 and the second dynamic coefficient k qf2 The value range of S c is the converter capacity.

2. The rapid response method of the new energy power generation unit converter according to claim 1, characterized in that: The outer loop controller is a proportional-integral controller, and the outer loop control parameters are obtained by using the difference between the power command value and the actual power value of the new energy power generation unit converter, including: Calculating the difference between the power command value and the actual power value of the new energy power generation unit converter; The difference and its corresponding rate of change are input into a fuzzy controller so that the fuzzy controller outputs the outer loop control parameters, where the outer loop control parameters include a proportional coefficient and an integral coefficient.

3. A fast response device for a new energy power generation unit converter, characterized in that: The method for executing claim 1 or 2 comprises: An acquisition module is used to obtain outer loop control parameters using the difference between the power command value and the actual power value of the new energy power generation unit converter; An input module, configured to input the outer loop control parameters into an outer loop controller in a converter of a new energy power generation unit to obtain an outer loop output; a characterization module, configured to characterize an inner loop feedforward amount by multiplying an output current of the new energy power generation unit converter by an adaptive feedforward coefficient; The control module is used to input the outer loop output and the inner loop feedforward into the inner loop controller in the new energy power generation unit converter, so that the new energy power generation unit converter can achieve rapid response.

4. A power generation control system comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to claim 1 or 2 are implemented.

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