473 results about "Power electronics converters" patented technology

The invention discloses a driving control method of a DAB converter and related equipment, and relates to the technical field of power electronic converter control, and the method comprises the steps: calculating a voltage transformation ratio based on an input voltage and an output voltage through a current stress adjustment module, and calculating an output power based on the output voltage and an output current, substituting the voltage transformation ratio and the output power into a current stress adaptive minimization algorithm to solve an internal phase shift angle; meanwhile, through a PI controller, an external shift phase angle is adjusted based on a difference value between the instruction voltage and the output voltage; outputting the inner phase shift angle and the outer phase shift angle to a PWM modulation generator to generate a switching tube driving signal; the DAB converter is controlled by the driving signal to realize rated voltage output and current stress minimization, so that the efficiency and reliability of the converter are improved.

The invention provides an impedance scanning device based on network side voltage dynamic compensation under a three-phase voltage imbalance working condition, and relates to the technical field of new energy station power electronic converter topology and control, the device comprises a three-phase rectifier, a direct current bus capacitor, an inverter, a voltage compensation device, a frequency sweeping device, a circuit breaker and a series transformer part, the three-phase rectifier is connected in series with inverters of the voltage compensation device and the frequency sweep device, a secondary side of a series transformer of the voltage compensation device is connected in series with a network side, a secondary side of a series transformer of the frequency sweep device is connected in series with a grid-connected point, and a primary side of the series transformer is connected to the inverters and is coupled to a secondary side of the series transformer; according to the device, the power grid side voltage is rectified through the voltage compensation unit and is compensated to the grid side after being subjected to single-stage inversion transformation, voltage compensation is achieved through the energy of a power grid when the voltage is unbalanced, and an external energy source or an interference source does not need to be introduced. After compensation, the accuracy of the frequency sweeping result is obviously improved.

The invention relates to a multi-energy collaborative intelligent micro-grid control method, device and equipment and a medium. According to the method, a micro-grid frequency signal is collected in real time, the change rate of the micro-grid frequency signal is calculated, the inertia requirement of a system is accurately evaluated, the maximum virtual inertia capable of being provided by each unit is dynamically calculated in combination with the physical characteristics and operation constraints of each energy unit, and the system requirement and the unit capacity are dynamically matched through grey correlation analysis to generate an optimal distribution scheme. And then the special control models of all the units are driven to generate differentiated power regulation instructions, and finally power support is cooperatively executed through the power electronic converter, so that accurate matching and efficient cooperation of multi-energy virtual inertia capability are realized, the frequency stability of a high-proportion new energy power grid is remarkably enhanced, and the system performance is improved. The problems of resource allocation mismatch, poor control adaptability and the like in a traditional method are effectively avoided, and the dynamic safety of the system is guaranteed under the complex operation working condition.

The invention discloses a cooperative control system for an input-series output-parallel dual-active-bridge inverter, and relates to the technical field of power electronic converter control, an input voltage equalizing control IVSC loop is set for m-1 DAB sub-modules, and input voltage equalization of the DAB sub-modules is realized by adjusting phase shift angles of the sub-modules; an output voltage control OVC loop is set for the output DC bus voltage of the whole ISOP-DAB system to stabilize the DC bus voltage, a PIR controller is adopted in the OVC loop, and the resonant frequency is set to be twice of the fundamental frequency of the AC side, so that selective high gain is provided at the position, the frequency doubling fluctuation of the DC bus voltage is inhibited, and the frequency doubling fluctuation of the DC bus voltage is inhibited. According to the method and the device, the regulation quantity of the IVSC loop and the regulation quantity of the OVC loop are superposed to carry out cooperative control, so that the effective suppression of the frequency doubling fluctuation of the DC bus voltage and the automatic equalization of the power of each module are accurately realized on the premise of not increasing the hardware complexity.

The invention relates to the technical field of power electronic converters, and discloses a grid-connected inverter multi-parameter online setting method, system and device and a medium. The method comprises the following steps: establishing a circuit simulation model of the grid-connected inverter; output currents of the grid-connected inverter under different power grid impedance working conditions are obtained through the circuit simulation model, and target control parameters of the grid-connected inverter under different power grid impedance working conditions are obtained through iterative search by adopting a particle swarm optimization algorithm through the circuit simulation model; performing off-line training on the parameter reasoning model through the output current of the grid-connected inverter under different power grid impedance working conditions and the target control parameter under the corresponding power grid impedance working condition; acquiring an output current of the grid-connected inverter in real time, and inputting the output current acquired in real time into the trained parameter reasoning model to obtain a corresponding target control parameter; and on-line setting is performed on the control parameters of the grid-connected inverter through the target control parameters output by the parameter reasoning model, so that rapid setting can be realized.

The invention discloses a control method for fast switching from heavy load to light load of an LCC resonant converter, and relates to the technical field of power electronic converter control. The method comprises the following steps: S1, building an LCC resonant converter; s2, monitoring load current in real time, and identifying a load abrupt change signal; s3, calculating coordinates of an intersection point of the current working point and the target light load trajectory according to the state trajectory model; and S4, triggering a switch tube advanced turn-off instruction at the switching point, and switching the driving system to a light load mode along the transition track. According to the invention, a specific switching period is introduced during frequency switching, so that the resonant converter can be rapidly and stably switched from a heavy-load working mode to a light-load working mode. According to the switching mode, the voltage overshoot phenomenon during load sudden change can be effectively suppressed, the response time can be shortened, and the dynamic response performance of the resonant converter can be greatly improved. Compared with a traditional scheme, the system stability is improved, and the power loss is reduced.

The invention discloses a variable frequency phase shift control DAB type single-stage inverter reactive power control method, system and device and a medium, and belongs to the technical field of power electronic converter control, and the method comprises the steps: setting a reactive power instruction as zero; when the reactive power instruction changes, the active power instruction and the reactive power instruction at the current moment are decomposed into a direct-axis current reference value and a quadrature-axis current reference value respectively; comparing the reference value with an actual sampling value, calculating an error compensation amount by using a PI controller, and determining the amplitude and phase of the AC side current according to the compensation amount; according to the amplitude and the phase of the voltage and the current, a DAB frequency conversion phase shift control curve is calculated; and generating a PWM (Pulse Width Modulation) signal according to the frequency conversion phase shift control curve obtained by calculation, wherein the PWM signal is used for driving a DAB inverter to carry out power transmission. According to the invention, on the premise that no extra hardware circuit is introduced, dynamic adjustment and accurate control of the instantaneous reactive power of the AC output side can be realized.

A electrical power system comprises: an electrical machine operable to output AC; a DC electrical network; a power electronics converter connected between the AC output of the electrical machine and the DC electrical network and including a plurality of transistors and associated diodes connected in parallel with the transistors; and a controller configured to control switching of the transistors of the converter so that, during normal operation of the electrical power system, the converter rectifies the AC output of the electrical machine to supply the DC electrical network with DC electrical power. The controller is further configured, responsive to a determination to the effect there is a fault in the DC electrical network, to control a voltage source, to inject a voltage to bias the diodes of the converter, and to control the switching of the transistors to control a level of current supplied to the faulted DC electrical network.

The invention discloses an energy storage converter predictive current control method based on data driving model self-learning, and belongs to the technical field of power electronic converter control. The energy storage converter is a half-bridge bidirectional DC-DC converter, and the method comprises the following steps: collecting the state quantity of the energy storage converter through a sensor in each control period, forming a data driving prediction model constructed by an input vector input neural network online parameter identification module, and outputting an initial duty ratio prediction value; constructing a value function, performing online optimization on an initial value through a gradient descent method to obtain a final optimal duty ratio, and simplifying a scene to directly use the initial value; comparing the optimal duty ratio with a carrier wave to generate a PWM (Pulse Width Modulation) signal to drive a power switch tube; actual inductive current is collected, an ideal duty ratio enabling the value function to be minimum is reversely solved to serve as a supervision signal, and the model weight is trained and updated online through a sample. The technical problem that traditional continuous set model predictive control depends on an accurate mathematical model is solved.

The invention relates to the technical field of intelligent control of power electronic converters and induction heating, in particular to an intelligent control system of a medium-frequency power supply, which comprises a data acquisition module configured to acquire end-side voltage data and end-side current data of power conversion hardware in real time; the feature extraction module is configured to receive the end-side voltage data and the end-side current data and extract broadband waveform distortion features; the state evaluation module is configured to receive the broadband waveform distortion characteristics and calculate a model trust entropy value based on the broadband waveform distortion characteristics; the self-adaptive control module is configured to receive the model trust entropy value, trigger a second control mode to generate a second switch instruction and send the second switch instruction to the power conversion hardware; the model trust entropy represents a prediction deviation degree of a preset robust control model to the current real physical state of the power conversion hardware; according to the invention, the problem of insufficient perception of fine-grained service parameters in the background technology is solved.

Examples described herein provide a circuit that includes a power electronics converter disposed in a vehicle, the power electronics converter to receive alternating current (AC) electrical power from an AC grid source and to provide AC electrical power to an AC load external to the vehicle. The power electronics converter includes an AC-AC converter that includes a rectifier and an inverter, the rectifier being electrically connected to the inverter by a direct current (DC) link. The circuit further includes an on-board charging module electrically connected to the power electronics converter and a battery disposed in the vehicle. The power electronics converter provides vehicle-to-load functionality by providing, to the AC load, AC electric power as an output of at least one of a 120 Vac output or a 240 Vac output.

The invention relates to the technical field of power electronic converter control, in particular to an LLC converter dynamic response capability optimization control method based on a neural network, and the method comprises the steps: building an LLC converter dynamic response mathematical model based on a frequency conversion modulation strategy; optimizing the dynamic response process of the LLC converter during load switching by selecting a differential evolution algorithm and combining the mathematical model, and collecting k groups of frequency data with optimal LLC dynamic performance during load switching; training a pre-constructed neural network model by taking the collected k groups of frequency data with optimal LLC dynamic performance for load switching as training data; and applying the trained neural network model to an LLC converter controller to realize optimization of a dynamic response process. According to the invention, the LLC converter has better dynamic response capability in the load switching process, so that the LLC converter can stably and quickly reach a new steady state.

The invention discloses an active-disturbance-rejection control method and system for a four-port magnetic network electric energy router, and belongs to the technical field of isolated power electronic converters. The method is based on a proportional-integral control method of a decoupling matrix, and is combined with an adaptive disturbance suppression state observer to be used in the magnetic network electric energy router, so that the active disturbance rejection of the system is improved, and particularly, the common problem of parameter mismatching in a traditional decoupling control method is solved. The method comprises the following steps: step 1, establishing a simple and effective power decoupling matrix, thereby realizing efficient power decoupling among a plurality of ports, effectively reducing mutual interference among the ports, and ensuring that control of each port can be independent and stable; and 2, introducing an adaptive disturbance suppression state observer into a feedback system, so that the system can estimate and compensate errors caused by parameter uncertainty or noise interference in real time, and the active disturbance rejection of the system under dynamic and complex working conditions is greatly improved.

The invention relates to the technical field of power electronics, discloses a management method of an intelligent power electronic converter, and aims to solve the problem that in the prior art, operation performance and long-term reliability cannot be collaboratively optimized. According to the method, voltage, current, temperature and vibration data are collected in real time through a multi-mode sensor, and a high-fidelity digital twinborn model fusing electromagnetism, thermodynamics and component aging mechanisms is constructed and calibrated online; based on the model, a multi-objective optimization function including efficiency, electric energy quality, residual life and accumulated damage is established in a prediction time domain, a Pareto optimal control parameter set is solved by adopting a multi-objective evolutionary algorithm, and an optimal solution is selected according to a dynamic utility function to generate a driving instruction. The system comprises a state sensing module, a digital twin modeling module, a prediction optimization module, a strategy decision module and a driving execution module, full-dimension self-adaptive closed-loop management of performance and service life is achieved, and the intelligent level, economical efficiency and reliability of the converter are remarkably improved.

A power electronics converter including: an input terminal; first and second DC output terminals; a branch having first and second semiconductor switches connected in series between the first and second DC output terminals, the input terminal connected to a node between the first and second semiconductor switches; a DC link capacitor connected between the first and second DC output terminals; a differential current sensor arranged to measure a differential current signal through the first or second DC terminals; and a controller configured to provide switching signals to each of the first and second switches of the power electronics converter, wherein the controller is further configured to detect a fault in a DC network connected between the first and second DC output terminals upon detection of a peak in an output from the differential current sensor.

The present invention belongs to the technical field of power electronic converters and discloses a medium-voltage distribution network flexible interconnection switch topology and control method. The medium-voltage distribution network flexible interconnection switch topology provided by the present invention includes three connected reactors L1, three connected reactors L3, two chain-type STATCOMs, two three-phase isolation transformers, two three-phase LC filters, two three-phase inverter circuits, and a DC port. Back-to-back three-phase converters are introduced at the ends of the chain-type STATCOMs of two feeders. Through the back-to-back three-phase converters, active power flow mutualization between the two medium-voltage chain-type STATCOMs, that is, between two different feeders, can be achieved. The present invention can achieve DC capacitor voltage balancing of the chain-type STATCOM submodules of the two feeders. Compared with the BTB-VSC commonly used in existing medium-voltage distribution network flexible interconnection demonstration projects, this solution has lower cost, simpler topology, easier control, and does not need to consider the active and reactive power decoupling issues between interconnected feeders, making it easy to promote and apply on a large scale.

The invention discloses a four-port magnetic network energy router prediction control method and system based on a data model, and belongs to the technical field of multi-port isolation type power electronic converters. The method comprises the following steps of: establishing a power model of the four-port magnetic network electric energy router and a power data model of each port, discretizing and matrix the data model, establishing an error between the discrete data model and actual data, and updating the data model in real time; predicting the power of each port in the future according to the data model of each port, establishing a phase shift angle set range of each port in combination with the actual power, and calculating power prediction corresponding to different phase shift angle sets; and finally, selecting a phase shift angle set corresponding to the minimum power error as an optimal set, and applying the optimal set to the next control period. According to the method, challenges caused by external environment changes and internal parameter fluctuations can be effectively handled, and the router is ensured to stably and efficiently work under different operation conditions.

The invention relates to the technical field of power electronic converters, in particular to a converter networking control method with a low-frequency impedance remodeling function. Comprising a network construction control module, a virtual impedance control module, a first coordinate transformation module, a second coordinate transformation module, a third coordinate transformation module, a current control module, a voltage filtering module, a low-frequency impedance remodeling module and a coordinate inverse transformation module. According to the method, low-frequency-band positive impedance is achieved, the stability of the power electronic converter in a weak power grid environment is improved, meanwhile, the modular design is easily integrated into an existing converter system, the oscillation risk caused by fundamental frequency negative impedance is thoroughly eliminated, broadband compatibility is achieved, the 0-200 Hz harmonic range is covered, and the performance is optimized through an adjustable remolding coefficient kz.

The invention discloses a resonant converter output overload and short circuit protection system and method without output current detection, and belongs to the technical field of power electronic converters. When a resonance tank current peak detection signal is equal to a ramp signal to trigger a comparator to output a high-level pulse, the edge triggers the microcontroller to interrupt, and the register value of the current ramp signal is captured immediately after interruption, so that a resonance current peak can be obtained. After an output overload and short circuit fault mark based on the value and the output voltage is triggered, the switching frequency is adjusted through the slope parameter self-adaptive controller to achieve output overload protection, and when the output overload is serious or short circuit occurs, rapid wave sealing protection can be achieved through a software code and a hardware comparator. And meanwhile, the soft start function of the resonant converter can be realized by gradually decreasing the initial value of the set slope descent rate cycle by cycle during starting. The control performance of the resonant converter is improved under the control of the peak current, and the output overload and short circuit protection function can be realized without adding an output current detection circuit.

The invention belongs to the related technical field of power electronic converters, and discloses an LLC resonant converter light load smooth transition control method and system, and the method comprises the steps: carrying out the PI calculation according to the real-time output voltage of an LLC, and obtaining a pre-output frequency; if the pre-output frequency is greater than or equal to the maximum output frequency, entering a second working mode; at the moment, the actual output frequency is set to be the maximum output frequency, and the duty ratio of intermittent control is set according to the exceeding degree of the pre-output frequency relative to the maximum output frequency; a PFM modulation signal is generated according to the actual output frequency, a burst signal is generated according to the intermittent control duty ratio, and a driving signal is generated according to the PFM modulation signal and the burst signal to control the LLC resonant converter. The control requirements of the PFM modulation mode under the normal working condition and the burst mode under the light-load working condition can be met by using one set of PI control parameters, and smooth transition of light-load control is achieved.

The invention discloses a self-adaptive control method, system and device for inertia coefficients of a network-forming converter and a storage medium, and relates to the technical field of power electronic converter control, and the method comprises the steps: collecting the DC side voltage of a converter in real time through a voltage sensor, and calculating the deviation between the DC side voltage and a DC voltage reference value; the output angular velocity deviation of the converter is obtained, the inertia coefficient of the converter is dynamically adjusted through a nonlinear function in combination with the direct-current side voltage deviation, and self-adaptive adjustment of control parameters of the converter is achieved; the dynamically adjusted inertia coefficient of the converter is substituted into a converter control link in real time, and the output characteristic of the converter is changed, so that the output performance of the converter is optimized; self-synchronization grid connection can be realized, the anti-interference capability of the system is enhanced, the converter adapts to complex working conditions, virtual inertia is provided for a power grid, the frequency of the power grid is stabilized, and the operation stability of the grid-forming converter and the new energy accepting capability of the power grid are improved.

The invention relates to the technical field of power electronic converter grid-connected control. The invention discloses a model prediction transient stability control method of a VSC-PLL system in a weak network environment. The model prediction transient stability control method is characterized by comprising the following steps: 1) constructing a dynamic model of the system: (1) constructing a physical model and a state equation; (2) discretizing the model; the core composition of the MPC optimization problem comprises (1) prediction model and time domain setting, (2) objective function design, (3) constraint condition set, and (3) rolling optimization and self-adaptive control mechanism: (1) real-time parameter updating, and (2) optimization solution and control execution. The method can realize on-line optimization of active / reactive current set values.

The invention discloses a compensation switching method and device and a hybrid distribution transformer system. The method comprises the following steps: firstly, obtaining the current working mode of the hybrid distribution transformer system, wherein the current working mode comprises a compensation working mode and a non-compensation working mode; in the compensation working mode, the electromagnetic transformer is in a working state, and the power electronic converter is in a compensation state; in the non-compensation working mode, the electromagnetic transformer still works, and the power electronic converter is in a bypass state and does not work; then electric energy quality parameters in the current working mode are obtained; and finally, according to the electric energy quality parameters, determining that the next working mode of the hybrid distribution transformer system is a non-compensation working mode or a compensation working mode, and switching between the compensation working mode and the non-compensation working mode. According to the method, dynamic compensation and non-compensation switching can be realized according to different electric energy quality parameters, so that the electric energy quality is optimized, and the energy consumption is reduced.

The invention discloses a leakage current suppression method and circuit for a soft switching grid-connected inverter, and belongs to the technical field of power electronic converters, and the method comprises the steps: building a space voltage vector according to a three-phase voltage, building a three-level vector space in a complex plane, and dividing sectors; defining boundary conditions, and dividing each sub-sector into six small sectors according to the boundary conditions; determining a small sector where the reference voltage vector is located according to the boundary condition and the reference vector; determining a five-segment basic vector action sequence according to the small sector where the reference voltage vector is located; according to the basic vector action sequence, boundary switching frequencies in the non-clamping two phases are obtained, and the minimum value of the boundary switching frequencies in the non-clamping two phases is selected as a unified switching frequency; and modulating the three-phase modulation wave, the unified switching frequency and the DC voltage sampling value, and outputting a pulse width control signal of each power switch tube. According to the invention, a low common-mode voltage change rate and wide-range soft switching of the power switch tube are realized, and leakage current can be effectively suppressed.

The present application relates to the technical field of power electronic converter, and discloses a grid-connected inverter multi-parameter online setting method, system, device and medium.The method comprises the following steps: establishing a circuit simulation model of the grid-connected inverter; obtaining the output current of the grid-connected inverter under different grid impedance conditions through the circuit simulation model, and obtaining the target control parameters of the grid-connected inverter under different grid impedance conditions through iterative search of the particle swarm optimization algorithm of the circuit simulation model; performing offline training on the parameter reasoning model through the output current of the grid-connected inverter under different grid impedance conditions and the target control parameters under the corresponding grid impedance conditions; obtaining the output current of the grid-connected inverter in real time, inputting the real-time output current into the trained parameter reasoning model, and obtaining the corresponding target control parameters; and performing online setting on the control parameters of the grid-connected inverter through the target control parameters output by the parameter reasoning model, so that fast setting can be realized.

The invention relates to the technical field of power electronic conversion, in particular to a seamless switching control method and system for grid-connected and off-grid modes of an energy storage converter, and the method comprises the following steps: mode pre-judgment, seamless switching, virtual inertia and damping simulation and re-grid-connected pre-synchronization. The system comprises a multi-mode detection and pre-judgment module, a unified multi-mode controller, a state synchronization and observer module and a phase-locked loop-free synchronizer. According to the method, the whole process control problem from grid connection to grid disconnection and then grid connection is solved, the seamless degree of switching reaches a new level, and the active supporting capacity and friendly grid connection performance of the energy storage converter serving as a micro-grid core control unit are comprehensively improved; and the method has an important value for promoting the construction and development of a high-reliability micro-grid.

The invention discloses an operation parameter optimization method and system for improving the overload capacity of a power electronic converter, and belongs to the technical field of power electronics. The method comprises the following steps: constructing an output current model considering current ripples in a switching period, and obtaining an accurate current waveform expression; calculating conduction loss and switching loss of each power device in each switching period based on the model; under a set temperature rise or loss constraint condition, parameters such as direct-current voltage and switching frequency are optimized through an optimization algorithm, and the optimized parameters are applied to converter operation. The method solves the problem that loss estimation is inaccurate due to the fact that a traditional simplified model ignores current ripples, through precise modeling, refined loss calculation and scientific parameter optimization, the thermal stress of a device is remarkably reduced, the overload capacity of the converter is improved, the method is suitable for various topologies such as a two-level converter, a three-level converter and a direct-current converter, and the method has wide application prospects. The method can be widely applied to the fields of new energy and rail transit.

The invention relates to the technical field of power systems, in particular to a frequency-locked loop control method and system based on a double-second-order generalized integrator. According to the method, a traditional phase-locked loop is replaced by a frequency-locked loop to provide center frequency for the bisecond-order generalized integrator, and high-precision and high-response-speed real-time tracking of power grid frequency is achieved. And based on a DSOGI-FLL structure, parallel processing is carried out on the axis signal and the axis signal after Clark transformation, an orthogonal signal is generated, a positive sequence component and a negative sequence component are decoupled, and frequency doubling fluctuation under the asymmetric working condition of the power grid is eliminated. A phase angle of a positive sequence component is locked by combining a single synchronous coordinate system phase-locked loop, a positive sequence dq-axis component and a negative sequence dq-axis component are output through dq conversion, and a power grid synchronizing signal is rapidly obtained when voltage drops, frequency abrupt changes and three-phase faults occur. According to the method, the dynamic response speed and the detection precision can be remarkably improved, additional parameter compensation calculation is avoided, the universality of the method is enhanced, and a high-reliability synchronization reference is provided for fault ride-through of the power electronic converter.

The invention provides a dual-mode parallel competition-dominated self-synchronizing voltage source wind turbine generator set and a control method thereof, and the wind turbine generator set comprises a wind power generation device which is composed of a wind turbine and a generator and is used for converting wind energy into electric energy; the alternating current / direct current conversion module consists of a power electronic converter and a chopper circuit and is used for realizing conversion between alternating current electric energy and direct current electric energy and realizing unloading when transient direct current voltage exceeds the limit; the self-synchronizing voltage source generation control module is composed of a dual-mode parallel competitive dominant control module, a modulation voltage control module and a synchronous phase angle control module and is used for autonomously establishing voltage, autonomously synchronizing a power grid and supporting transient frequency and voltage of the power grid; according to the direct current bus voltage and the power grid voltage, the self-synchronizing voltage source characteristics of the unit under multiple operation working conditions such as wind speed disturbance and power grid faults are maintained through state keeping and competitive leading of the two voltage source control modes. The invention is suitable for doubly-fed and full-power wind turbine generators, and comprises control, equipment and a system.

The invention provides an active support self-adaptive control method for a network construction type converter. The active support self-adaptive control method for the network construction type converter comprises the following steps: S01, calculating a frequency difference value and a frequency change rate value of the network construction type converter; s02, calculating an inertia coefficient according to a frequency change degree comprehensive threshold value; s03, calculating a damping coefficient according to the frequency difference threshold value; s04, realizing active support control by simulating the characteristics of a synchronous machine; and S05, performing pulse width modulation on the internal potential through vector control. According to the active support self-adaptive control method for the network construction type converter, main parameters are self-adaptively adjusted according to the external environment of the system to suppress power and frequency fluctuation, the method can be suitable for the operation occasion of a power electronic converter, and particularly, the steady state of the network construction type converter is not influenced by external disturbance; therefore, the active support control performance of the converter is improved.