459 results about "Virtual synchronous generator" patented technology

The present invention provides an inverter control method, device, computer equipment and storage medium, belonging to the field of power electronics. The method comprises: determining a frequency control equation of the inverter under a grid-connected condition when the inverter is in a VSG control mode; determining a relationship between a virtual electromotive force of a virtual synchronous generator in a reactive state and an output voltage of the inverter; constructing a voltage-current double closed-loop control structure of the inverter under the VSG control mode, and determining a current reference value and a voltage reference value of the virtual synchronous generator under dq axes through the frequency control equation and the relationship; constructing a fuzzy control rule of a virtual damping coefficient and a virtual inertia according to the current reference value and the voltage reference value; and controlling the virtual damping coefficient and the virtual inertia through the fuzzy control rule, thereby improving the stability and performance of the inverter during the grid-connected process, reducing the harmonic disturbance of the power system, and helping to improve the adaptability and reliability of the entire photovoltaic power generation system.

The invention discloses a virtual synchronous generator grid-connected current harmonic suppression method and system, and relates to the technical field of power systems, and the method comprises the steps: S1, carrying out the digital sampling of intermittent high-frequency disturbance through a wind power plant grid-connected current signal in a power grid through an analog-to-digital converter, and obtaining an original digital current sequence; s2, according to the original digital current sequence, analyzing a wind load frequency component by adopting a fast Fourier transform algorithm, and determining amplitude and phase characteristics of a high-frequency harmonic component; s3, if the amplitude of the high-frequency harmonic component exceeds a preset threshold value, extracting an intermittent disturbance harmonic sequence from the frequency component to obtain a to-be-suppressed harmonic subset; according to the virtual synchronous generator grid-connected current harmonic suppression method and system, the stability of a remote wind power plant power grid is remarkably improved, continuous monitoring and real-time suppression of intermittent disturbance are achieved, and high efficiency and reliability of power grid operation are guaranteed.

The invention provides a virtual synchronous generator adaptive control method based on line impedance identification, and relates to the technical field of power system control. The line impedance identification-based adaptive control method for the virtual synchronous generator comprises the steps of dynamically adjusting the virtual inertia J, the damping coefficient D and the droop coefficient K of the virtual synchronous generator through a multivariable constraint optimization algorithm according to the impedance-frequency coupling model, and realizing real-time matching between the output power of the virtual synchronous generator and the impedance of a power grid. By collecting power grid signals in real time and extracting impedance characteristics, the dynamic change of power grid impedance can be timely and accurately mastered, and a reliable basis is provided for subsequent control strategy adjustment, so that real-time matching of the output power of the virtual synchronous generator and the power grid impedance is realized, power fluctuation is effectively reduced, and the stability of a power grid is improved; according to the invention, a self-adaptive modulation strategy and a multi-resonant controller are adopted, harmonic oscillation can be effectively suppressed, and the quality of output electric energy of the inverter is improved.

The invention discloses a stability analysis method for a hybrid grid-connected system of a grid-following converter, and the method comprises the steps: constructing precise impedance models of a grid-following type (GFL) converter and a grid-constructing type (GFM) converter respectively based on a phase-locked loop (PLL) mechanism and a virtual synchronous generator (VSG) control strategy, and the details are shown in an abstract figure 1; deducing the total equivalent impedance of the system at a point of common coupling (PCC) according to a circuit equivalence principle; performing stability analysis and sensitivity evaluation on different converter combination proportions, topological structures and key control parameters of the hybrid grid-connected system based on an impedance ratio criterion; and verifying the accuracy of the analysis result through frequency domain simulation. The method can be widely applied to a new energy power system, solves the problem of system stability evaluation and optimization under the high-proportion renewable energy access background, and has the characteristics of high adaptability, accurate model and comprehensive analysis.

The invention relates to the field of power system frequency stability control, and discloses a virtual synchronous machine energy storage frequency modulation method and system based on model prediction and adaptive control, and the method comprises the steps: constructing a prediction model of a virtual synchronous machine, wherein a virtual inertia coefficient and a virtual damping coefficient are included; designing a cost function, wherein the cost function is a weighted sum of squares of the frequency increment and the input power increment; solving the optimal control sequence by using quadratic programming, and further correcting the input power of the VSG in real time; and in combination with the dynamic characteristics of the energy storage device, the virtual inertia coefficient and the damping coefficient are adaptively adjusted according to the frequency deviation and the frequency change rate. The method focuses on the combination of model prediction control and adaptive control, is applied to the energy storage frequency modulation of the virtual synchronous machine, and aims to effectively solve the problem of frequency stability caused by the access of high-proportion renewable energy to a power system.

A transient stability control method for an islanding system with parallel heterogeneous networking inverters comprises the following steps: when a symmetric short-circuit fault occurs in a common line, collecting a grid-connected point voltage effective value of a droop control inverter and a frequency output value of a droop control and virtual synchronous generator; calculating a fault degree based on the voltage effective value, and determining a relative frequency by combining droop control and a VSG frequency difference value; generating a transient stability improvement coefficient according to the fault degree; the lifting coefficient and the relative frequency are fused through an integrator, and adjusting power is generated; injecting the adjusting power into the droop control equation to obtain an improved droop control equation; and combining the improved droop control equation and the VSG control equation to obtain an equivalent synchronous motion equation of the heterogeneous network-building type inverter parallel system during the fault period. According to the method, the power distribution is dynamically adjusted, the power transmission limit of the system during the fault period is improved, the transient stability under the serious fault is ensured, and an effective control scheme is provided for the micro-grid containing the heterogeneous inverter.

The invention discloses a system and a method for analyzing stability and oscillation transmission of a network-forming converter system, and belongs to the technical field of virtual synchronous generator control, and the system comprises an active power control loop which takes an active power deviation value as input, and outputs a power angle of a VSG system through an active integration part and a feedback part; the reactive power control loop takes the reactive power deviation ratio as input, and outputs the voltage amplitude of the VSG system through an active integration part and a feedback part; according to the analysis method, whether each state variable is stable or not is judged firstly, and then the intensity of oscillation transmission between the state variables is judged. According to the method, the stability of the system can be evaluated more accurately, and the accuracy of system stability analysis under dynamic disturbance is ensured; an oscillation transfer effect function is introduced, and the mutual influence between different state variables is quantitatively analyzed; and the dynamic fluctuation range of each state variable in the system can be accurately evaluated.

The invention discloses a virtual synchronous machine control-based impedance modeling and virtual impedance design method for a network construction type MMC (Modular Multilevel Converter). The method comprises the following steps: firstly, establishing a mathematical model of a network construction type MMC converter based on virtual synchronous machine control through a control strategy, and establishing a sequence impedance model of the MMC by adopting a harmonic linearization method; secondly, designing virtual impedance control to optimize traditional VSG control, and proposing a sequence impedance model after introduction of the virtual impedance control; and finally, analyzing impedance characteristics and grid-connected stability of the MMC converter after virtual impedance control is introduced. According to the method, the MMC sequence impedance model based on virtual impedance control can be effectively established, the grid-connected stability of the MMC sequence impedance model is analyzed, and the method has economical and practical values.

The invention relates to an energy storage converter grid-connected method based on virtual synchronous generator control. Compared with the prior art, the defects that in an existing energy storage converter grid-connected control technology, the response capacity to power grid disturbance is weak, the power control precision and stability are insufficient, and the robustness of a controller is poor are overcome. The method comprises the following steps: designing a self-adaptive rule of virtual inertia and a damping coefficient in an active loop of a VSG controller; self-adaptive adjustment is carried out; designing a VSG power decoupling controller based on hyper-local model cooperative control; smooth power following and effective decoupling control of active power and reactive power. According to the method, the inertia and damping characteristics of a synchronous generator are achieved in the operation process of the energy storage grid-connected converter, when grid-connected active power or grid-connected frequency is disturbed, frequency fluctuation can be restrained through self-adaptive adjustment of the virtual inertia and the damping coefficient, and the good power decoupling control capacity is achieved.

The invention provides a strong series compensation grid-connected stability regulation and control method of a grid-forming type energy storage converter and a related device, and belongs to the technical field of grid connection of a power grid. According to the method, a three-phase grid-connected inverter complete sequence impedance model controlled by the virtual synchronous generator is established by using a harmonic linearization method, and reasons for causing subsynchronous oscillation by using a double-closed-loop control strategy are analyzed. In order to improve the grid-connected stability of a strong series compensation power grid of a grid-forming type energy storage converter, a PI-LADRC control strategy is provided, a sequence impedance model under the control mode is established, and grid-connected stability margin information under the PI-LADRC control strategy is obtained by comparing output impedance characteristics of a grid-connected inverter under a double closed-loop control mode and a PI-LADRC control mode. According to the invention, the PI-LADRC control strategy is adopted, so that the grid-connected stability can be effectively regulated and controlled.

The invention relates to the technical field of inverter control, and discloses a VSG-based inverter phase-locked loop-free pre-synchronization method, system and device and a medium, and the method comprises the steps: eliminating the voltage deviation between the VSG inverter voltage of a virtual synchronous generator and the output voltage of a micro-grid through a deviation integral feedback method; a general signal delay superposition operator is adopted to filter the power grid voltage so as to construct virtual power, then the virtual power is introduced into an active-frequency loop of the virtual synchronous generator as a feedback signal, and a power angle feedback control model is formed so as to adjust the VSG inverter voltage; and detecting the voltage deviation between the power grid voltage and the adjusted VSG inverter voltage in real time, and when it is judged that the voltage deviation is smaller than a deviation threshold value, generating a grid-connected connection point switching-on instruction and controlling a switch of a grid-connected connection point to be switched on, so that phase-locked loop-free pre-synchronization of the distributed power supply inverter is realized, the grid-connected stability of the distributed power supply inverter is enhanced, and the grid-connected stability of the distributed power supply inverter is improved. And the current and voltage impact of the grid-connected instant system is reduced.

A device, method, and non-transitory computer readable medium for controlling a power distribution system includes an islanded microgrid and a control system. The islanded microgrid includes battery energy storage systems (BESSs) that operate as a primary energy source, and a decentralized consensus-based virtual synchronous generator (VSG). The control system simultaneously, emulates inertial response of a synchronous generator by the virtual synchronous generator during grid disruptions to regulate and stabilizes frequency of the islanded microgrid, and maintain consensus among the plurality of battery energy storage systems (BESSs).

The invention discloses a VSG damping enhancement control method based on active lead-lag compensation, and belongs to the field of new energy converter technology control. The method comprises the steps of firstly sampling output voltage and current of a new energy converter, calculating output instantaneous active power and reactive power of a virtual synchronous generator through the sampled voltage and current, and then obtaining an output phase instruction value and a voltage control instruction value through an optimized active-frequency loop and an optimized reactive-voltage loop; and finally, through voltage and current double-closed-loop control, the control of the new energy converter is realized. According to the method, the system damping ratio is increased in the transient process through the control method that the active power is fed back to the forward channel after lead-lag compensation, overshoot and oscillation generated when the active power output by the system changes are effectively restrained, tiny overshoot which cannot be restrained cannot be generated, and when the power grid angular frequency breaks away from the rated value, the system damping ratio is increased. And the steady-state characteristics of the system are not influenced.

The invention discloses a method and system for measuring inertia and damping parameters of a grid-forming type wind turbine generator, and relates to the technical field of grid-connected converter detection, and the method comprises the steps: connecting a test device to a to-be-tested grid-forming type wind turbine generator operating in an off-grid mode, enabling the test device to apply frequency disturbance and small-phase disturbance to the to-be-tested wind turbine generator at an initial moment, acquiring voltage and current of a unit port until the virtual synchronous generator reaches a stable working state, and respectively acquiring a steady-state value of the active power variation of the unit and a transient response curve of the active power variation in the whole response process; on the basis of the steady-state value of the active power variable quantity, the applied frequency disturbance is combined, and a damping coefficient is calculated according to a first relation; and on the basis of the transient response curve, an envelope line of the curve is calculated and obtained, then a product value of the natural oscillation angular frequency and the damping ratio is obtained, the reference angular frequency and the damping coefficient are combined, and the virtual inertia is calculated according to a second relation. According to the invention, accurate and efficient measurement of inertia and damping parameters can be realized.

The invention discloses a network construction type converter control method and system based on a virtual impedance feedforward controller, and the converter comprises a DC voltage source, a three-phase half-bridge converter, a low-pass output LC filter, a virtual synchronous generator control module, a virtual impedance control module, and a voltage and current double-closed-loop control module. The method specifically comprises the following steps: establishing a small signal model considering coupling on a network construction type converter based on virtual synchronous generator control; a small signal model for coupling is analyzed and considered, an active power loop, a reactive power loop and a coupling function all contain the same conjugate pole, synchronous frequency resonance can be caused, and coupling can intensify the synchronous frequency resonance; a feedforward controller containing virtual impedance is designed to increase system damping, and unstable factors introduced by the controller are inhibited by simplifying the controller; the damping and bandwidth of the system are comprehensively considered, and the setting condition of the virtual impedance is calculated. The device can restrain synchronous frequency resonance and has the advantages of being high in response speed and good in damping effect.

The invention discloses a particle swarm and non-linear programming hybrid optimization VSG adaptive control method and system, and relates to the technical field of virtual synchronous generator control, and the method comprises the steps: collecting a filter inductor current and capacitor voltage signal, outputting an instantaneous active power and a reactive power, constructing a small signal dynamic model of a VSG, and building a parameter mapping relation; setting a constraint range based on the parameter mapping relation in combination with a second-order oscillation modal stability criterion of the power system; constructing a hybrid optimization algorithm according to the constraint range, and outputting steady-state data; constructing a two-dimensional threshold criterion system, and cooperatively generating a voltage reference value through a speed regulator and a controller; the voltage reference value is compared with the actual output voltage, and the inverter output is driven through PI control and PWM modulation. The method has the beneficial effects that the parameter optimization precision is improved, the stability of the system is guaranteed, and the calculation efficiency of the algorithm is improved.

The invention discloses an LSTM (Long Short Term Memory)-based harmonic frequency coupling model optimization method for a network construction type converter, which considers the influence of a dead zone and establishes a converter model controlled by a virtual synchronous generator based on a harmonic state space method. In the power electronic modeling process, due to approximate simplification, switch neglecting and other nonlinear relations, the model is not accurate enough, meanwhile, in the harmonic state space model modeling process, system state variable parameters need to be considered, and the precision of the model affects harmonic transmission characteristics and coupling analysis, so that the modeling efficiency is greatly improved. Errors caused by power electronic modeling are reduced through an LSTM neural network algorithm, the harmonic amplitude estimation difference is reduced, state variable parameter values in a system model are accurately estimated, the model precision is further improved, and then the harmonic coupling condition under the dead zone influence is effectively and accurately analyzed.

The invention provides a network source coordination control system and method for an offshore wind power flexible direct current transmission system, and the system comprises a receiving end converter control module which controls the output frequency of a receiving end converter through a power ring by simulating the synchronous operation mechanism of a virtual synchronous generator; the voltage loop controls the output voltage of the receiving end converter; the current reference value of the current loop is output and given through the voltage loop, and current tracking is realized through PI control; the sending-end converter control module is used for reflecting the active demand information of the system on the frequency of the sending-end offshore wind power collection alternating-current system to realize active support control of the offshore wind turbine generator to the flexible direct-current power transmission system; and the offshore wind turbine generator control module is used for participating in system frequency modulation control through the wind turbine generator when the wind turbine generator runs in a deloading mode under the normal condition and the power is unbalanced based on the variable-speed wind turbine generator control strategy.

The invention belongs to the field of networking type energy storage systems, and discloses a state of charge balance control method for a networking type energy storage unit and related equipment, and the method comprises the steps: obtaining a real-time SOC value and charging and discharging power, dynamically judging a preset working condition, determining an optimization target, and carrying out the optimization of a state of charge balance based on an optimization feedback coefficient. And the power is superposed in a power instruction to compensate the power fluctuation of the network-forming type energy storage unit so as to realize SOC balance control. The characteristics of the synchronous generator are simulated through the virtual synchronous generator model, so that the energy storage unit better adapts to the power grid; working conditions are judged according to real-time SOC and power, and different optimization targets are made for different working conditions, so that the control strategy is more targeted; a feedback coefficient is optimized to compensate power fluctuation, and the power is accurately regulated and controlled. By adopting the method, the problem of inaccurate regulation and control under a complex working condition of a traditional static balancing method can be effectively solved, the contradiction between the system efficiency and SOC balancing can be balanced, quick regulation can be realized when the SOC is close to a limit value, overcharge and overdischarge are avoided, safe and stable operation of a power grid is ensured, and the overall efficiency of an energy storage system is improved.

The invention provides a VSG inertia and damping adaptive coordination control method, and belongs to the technical field of virtual synchronous generator control. Research finds that the oscillation process can be segmented, and in each segment, the inertia and damping coefficient requirements are different. Based on the relevance between the rotational inertia / damping coefficient and the system angular frequency offset / angular frequency change rate, the arctan function is used in the control strategy provided by the invention to participate in adjusting the system inertia and damping change, and the advantage that the rotational inertia and damping coefficient parameters of the virtual synchronous machine are flexible and adjustable is fully utilized; the relevance between the angular frequency change rate / angular frequency offset and the rotational inertia / damping coefficient is studied. Through cooperative control of the rotational inertia and the damping coefficient, when the system is disturbed, sufficient inertia support can be provided, the frequency change of the system is stabilized, and the transient process of the frequency and the active power during system load disturbance is effectively improved.

A grid-connection pre-synchronization method for a virtual synchronous generator parallel system, and an electronic device. The grid-connection pre-synchronization method for the virtual synchronous generator parallel system comprises: after receiving a pre-synchronization instruction, n virtual synchronous generators start to perform grid-connection pre-synchronization, wherein the grid-connection pre-synchronization comprises frequency and phase pre-synchronization, and amplitude pre-synchronization (S110). The frequency and phase pre-synchronization comprises: calculating control amounts for the frequency and phase pre-synchronization; according to the control amounts for the frequency and phase pre-synchronization, calculating a damping power; according to a mechanical power, an electromagnetic power and the damping power, calculating an output angular frequency difference of the virtual synchronous generators; and according to the output angular frequency difference of the virtual synchronous generator sand a rated angular frequency, determining a power angle of the virtual synchronous generators.

The invention discloses a virtual synchronous generator parameter determination method and equipment, and relates to the field of power equipment. The rotational inertia and the damping coefficient can be dynamically determined, and the parameter accuracy is improved. The virtual synchronous generator parameter determination method comprises the steps that the frequency difference, the power difference and the frequency change rate of a power grid are collected in real time, a state vector at each moment is determined and input into a reinforcement learning agent, the reinforcement learning agent comprises an action network and an evaluation network, the action network outputs corresponding action parameters, and the evaluation network outputs a Q value; calculating a reward value according to the state vector and the action parameter, and extracting an experience tuple when the reward value meets a preset condition; obtaining a target Q value of the experience tuple, and calculating a time difference error between the Q value and the target Q value to update the evaluation network; calculating the strategy gradient of the action parameters to update the action network; and determining action parameters corresponding to the current state vector through the optimized reinforcement learning agent, wherein the action parameters are rotational inertia and a damping coefficient.

The invention discloses a converter grid following-grid construction control mode smooth switching method suitable for wide-range source-grid state change. The method comprises the following steps: constructing a phase-locked loop control loop, a power outer loop control loop and a current inner loop control loop of a grid following type converter based on constant power control; constructing a voltage control loop, a phase control loop and a voltage and current double-closed-loop control loop of the network construction type converter based on the virtual synchronous generator VSG; calculating real-time output active power P and reactive power Q of the converter; constructing a voltage phase synchronization loop switching control loop and a current instruction tracking loop, and realizing smooth switching of dq-axis current instruction values output by a power outer loop of a following network type and a voltage outer loop of a construction network type; and the output dq-axis current instruction value is transmitted to a current inner loop to generate a final voltage signal, and a PWM wave is output to the converter through a modulation link. According to the method, a voltage phase synchronous switching compensation mechanism is adopted, a voltage amplitude and a phase signal are synchronously corrected in the mode switching process, and smooth change of an inner ring current reference signal is achieved.

The invention discloses an off-grid and grid-connected smooth switching control method for a virtual synchronous generator based on adaptive parameters, and the method achieves the efficient switching and smooth transition of an off-grid and grid-connected mode through the dynamic adjustment of virtual impedance, rotational inertia and a damping factor based on a virtual synchronous generator control architecture of the adaptive parameters. The control architecture is divided into an inner loop current and voltage control module, an outer loop power-frequency control module and a self-adaptive parameter adjustment module, and comprises virtual impedance design, dynamic rotational inertia adjustment, self-adaptive damping factor switching and parameter optimization and modal analysis. In this way, the concept of virtual impedance is introduced into VSG control to improve the decoupling effect of active power and reactive power; a parameter alternating VSG is provided, singular value decomposition analysis and modal analysis are considered, and better performance is provided in the aspect of suppressing oscillation caused by disturbance by improving control parameters; and stable resynchronization between the converter and the power grid after grid connection and grid disconnection is realized.

The invention discloses an MMC intelligent setting and cooperative control method and system based on deep reinforcement learning, and relates to the technical field of power transmission system regulation and control, and the method comprises the steps: obtaining the current operation state data of a converter in a power transmission system, the current operation state data comprising a system frequency, a frequency reference value, a frequency deviation and a frequency change rate; establishing a third-order active closed-loop small signal transfer function based on an active transient feedback compensation algorithm, and decoupling a damping coefficient and a primary frequency modulation coefficient in VSG control through the third-order active closed-loop small signal transfer function; inputting the current operation state data into the trained DDPG intelligent agent for processing, and obtaining an optimization result of the virtual inertia; the optimized virtual inertia is applied to a rotational inertia control link of VSG control, and self-adaptive adjustment of the virtual inertia is carried out through the trained DDPG intelligent agent; the problem that control parameters of a traditional virtual synchronous generator VSG are fixed and are difficult to adapt to system operation state changes is solved.

The invention discloses a sub-microsecond simulation-based network construction type multi-converter modeling method, and relates to the technical field of converter modeling and simulation. Discretizing a switch element, and constructing a generalized constant admittance switch model based on an LC equivalent circuit; then, expansion modeling from a single converter to a multi-converter system is realized through a discrete system state matrix, and a complete network-forming type multi-converter model including a control link is established in combination with inertia characteristics of a virtual synchronous generator; and finally, building a simulation model of the network construction type multi-converter system in the PSCAD / EMTDC, and verifying the correctness and effectiveness of the method. According to the method, the generalized constant admittance switch model and the inertia characteristic of the virtual synchronous generator are fused, good applicability and stability are achieved under the sub-microsecond-level simulation step length, the system simulation precision and efficiency are remarkably improved, and meanwhile rapid convergence of the transient process of the network construction type multi-converter and active supporting of the power grid voltage frequency are achieved.

The invention discloses an energy storage type SOP black-start method, system and device based on improved VSG network construction control and a medium, and relates to the field of power grid black-start, and the method comprises the steps: an energy storage type converter MMC carries out the active and reactive control based on an improved VSG network construction control strategy; a non-fault side MMC is controlled to firstly close an isolation circuit breaker and slowly charge a direct-current capacitor, and when the voltage reaches a set threshold value, a current-limiting resistor is quitted; the fault side MMC is started by the same step as the non-fault side MMC; after synchronization is completed, AC circuit breakers between the non-fault side MMC and the feeder load and between the fault side MMC and the feeder load are closed respectively; based on the collected power grid power data, MMC output parameters are adjusted to meet the power grid connection condition, the control mode is switched according to the grid connection state, and the black start process is ended. And by arranging the black start resistor for current-limiting charging and sub-module voltage balance control, the phenomena of overcurrent and voltage unbalance in the black start process are avoided.

The invention discloses a network construction converter virtual impedance and power reference cooperative adjustment method and system, and relates to the technical field of power control, a virtual synchronous generator system introduces virtual impedance to increase equivalent output impedance of an inverter, and an internal voltage reference generated by a virtual synchronous generator algorithm of the inverter is monitored in real time; monitoring the local voltage measured by the common coupling point in real time; based on the vector difference between the internal voltage reference and the local voltage, the accurate amplitude of the virtual impedance is solved in real time by combining the maximum current limit value of the power electronic device; and determining a function relationship between an active power reference value and reactive power based on the accurate amplitude of the virtual impedance, monitoring the reactive power measured at the common coupling point in real time, and adjusting the active power reference value according to the function relationship to keep a stable balance point. And virtual impedance is dynamically calculated to accurately limit current, and active power reference is adaptively adjusted according to real-time reactive response, so that maximized power grid support and safe and stable operation of the converter are realized.

The embodiment of the invention discloses a control method and a control device of a virtual synchronous generator, and a network-forming inverter, which are used in the technical field of electrical control. According to the embodiment of the invention, the method comprises the steps: obtaining a damping gain coefficient of a virtual synchronous generator during transient fluctuation; adjusting a damping coefficient of an active ring in the virtual synchronous generator based on the damping gain coefficient to obtain a transient damping coefficient after gain; and when the virtual synchronous generator is in a steady state and the power grid frequency is changed, suppressing the change of the active power in the active loop based on the transient damping coefficient. The transient damping coefficient can control the active power not to change when the power grid frequency only has steady-state change, that is, primary frequency modulation is not carried out, so that the damping coefficient in an active ring is decoupled from a primary frequency modulation coefficient, and the accuracy of the primary frequency modulation of the virtual synchronous generator is ensured.

The invention provides a virtual synchronous generator control method based on adaptive RBF-LADRC, and the method comprises the steps: building a mathematical model of a virtual synchronous generator, introducing LADRC into a virtual speed regulator of the virtual synchronous generator as an outer loop frequency controller of an active control loop, and adjusting the active output of the virtual synchronous generator; adaptively adjusting a virtual coefficient in the mathematical model by using an RBF neural network; a voltage outer loop in voltage and current double-closed-loop control is designed based on linear active disturbance rejection control, a PI controller is replaced with an LED RC controller, a voltage and current double-closed-loop control system is obtained, and after reference voltage obtained through coupling of a virtual exciter and a virtual regulator is input into the voltage outer loop, double-closed-loop parameter adjustment control is carried out. Compared with traditional control, the method has the advantages that the system overshoot can be remarkably reduced, the active power tracking speed is increased, the power grid frequency stability is enhanced, and good anti-disturbance capacity is shown under the wind power plant short-circuit fault and low-frequency disturbance conditions.