287 results about "Active power control" patented technology

The invention relates to a shared energy storage virtual inertia compensation control method for wind power cluster collection, and belongs to the technical field of power system control. In order to solve the problem of insufficient cooperative control of a wind power system and an energy storage system in the prior art, a dynamic model is established by obtaining operation parameters, and the dynamic model comprises a wind turbine generator active power control model and an energy storage system charging and discharging model; designing a virtual inertia control strategy, and introducing virtual inertia control to simulate inertia response characteristics of the synchronous generator; shared energy storage coordination control is carried out, and a strategy is designed by using an MPC method according to an inertia demand and an SOC state; establishing a frequency dynamic response model and calculating inertia response time as a virtual inertia control start-stop condition; and optimizing controller parameters and designing locking logic by adopting an intelligent algorithm. The method can improve the system performance and efficiency, enhance the frequency stability, improve the energy utilization efficiency of the energy storage system, optimize the system performance, and improve the system stability and reliability.

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 relates to a design and parameter setting method for an active power controller of a network construction type converter. The method comprises the following steps: determining performance index requirements of the active power controller of the network construction type converter; according to performance index requirements and an automatic control principle, a mathematical model of an active power loop of a grid-connected inverter is used as a to-be-corrected object, proper rotational inertia and damping coefficient are selected to calculate steady-state gain, and then a controller is designed; according to a Bode diagram of a system open-loop transfer function after the controller is added, verifying whether the controller meets performance index requirements or not; the controller is corrected, a system open-loop transfer function at the moment is regarded as a new object to be corrected, and a correction network is designed according to frequency domain characteristics of the new object to be corrected; and correcting the new to-be-corrected object by adopting the correction network to obtain the final active power controller of the network construction type converter. According to the method, the active power controller meeting the performance index requirements is efficiently designed, and a theoretical basis is provided for the design of a control loop of a network-forming converter.

The present invention belongs to the field of smart grids, and relates to a DC voltage adaptive coordinated control system and method under fault of a VSC-HVDC receiving-end power grid. The present invention checks the MSR and compares it with the expected fastest fault clearance time to provide key activation conditions for the active power control of an SEC. When DC overvoltage is prevented, the active power regulation of the SEC and a dynamic brake resistor is reduced by optimizing the control activation thresholds and reference values of the SEC and a REC.

The invention provides an active load shedding optimization control method, system and device of a wind power plant and a storage medium, and belongs to the technical field of active power control of the wind power plant, and the method comprises the steps: constructing and training an SAC intelligent agent through an SAC algorithm; acquiring a wind power plant state quantity; inputting the state quantity of the wind power plant into the SAC intelligent agent to obtain a vector # imgabs0 # composed of active power initial reference values of all wind turbine generators; inputting the # imgabs 1 # into a constraint controller for secondary calculation to obtain a vector # imgabs 2 # composed of active power optimization reference values of the wind turbine generators; the wind power plant executes # imgabs3 #; and repeating the steps, and adjusting the active power of each wind turbine generator in real time. The model is high in generalization, stability, reliability and learning efficiency, real-time online calculation of the equivalent fatigue load can be achieved, reasonable distribution of the active power of the wind power plant can be achieved under the condition that the active power constraint of the wind power plant is met, the equivalent fatigue load of the whole wind power plant can be reduced, and the maintenance cost can be reduced.

The present invention belongs to the technical field of wind farm active power control and discloses a wind farm frequency modulation power distribution method that takes into account the historical fatigue load of the unit. The method comprises the following steps: collecting the frequency data of the wind farm grid connection point; when the frequency change exceeds the frequency modulation dead zone, calculating the wind farm active power change reference value ΔP farm ; Match the station active power change reference value ΔP in the formed scenario strategy set farm The corresponding optimized active power distribution results of the units. This distribution method is compared with the traditional proportional distribution scheme. While meeting the system frequency response requirements, the present invention improves the problems of sudden increase in fatigue load in wind farms and large differences in fatigue accumulation between units, and verifies the effectiveness of the proposed method.

The invention discloses a photovoltaic power station multi-source inverter active power control method and system, and relates to the technical field of photovoltaic power station active power control, and the method comprises the steps: calculating the dynamic performance score of each inverter based on the response time, conversion efficiency and health degree data of a multi-source inverter of a target photovoltaic power station; dividing the multi-source inverter into a response group and a steady-state compensation group based on the dynamic performance score and the dynamic division threshold; based on a preset allocation proportion, allocating the scheduling power regulation quantity to the response group and the steady-state compensation group; monitoring the overall output power of the target photovoltaic power station in real time; if the overall output power does not reach the target power range within the preset time, the active power output proportion of the response group is adjusted based on the prediction model; and after the overall output power of the target photovoltaic power station reaches the target power range, starting steady-state power replacement. The technical problem that the prior art cannot adapt to real-time working condition changes is relieved.

The static synchronous phase modifier comprises a DC / AC converter and a controller, the direct current side of the DC / AC converter is connected with an energy storage unit composed of the hybrid supercapacitor, and the alternating current side of the DC / AC converter is provided with an LC filter circuit; the controller adopts a virtual synchronous machine control technology to control the DC / AC converter, and comprises a power calculation part, an active power control part and a reactive power control part; the power calculation part is used for calculating actual active power and actual reactive power according to the current of the filter inductor, the voltage of the filter capacitor and the line current; the active power control part performs active power control according to the actual active power and the reference active power; the reactive power control part performs reactive power control according to the actual reactive power and the reference reactive power. According to the invention, frequency and voltage support can be provided when a short-circuit fault occurs in the line, frequency collapse is prevented, the low-voltage ride-through success rate of the wind turbine generator is improved, and the grid-connected strength is improved.

The invention relates to a fault current analysis method based on first-order Taylor expansion, and the method comprises the following steps: 1, determining a system control strategy which is a network construction type control strategy and comprises a power loop, a virtual impedance link and a voltage and current loop; the power loop comprises an active power control loop and a reactive power control loop; 2, constructing a differential algebraic equation set model capable of representing the dynamic state of the system; 3, according to the characteristic that the integral value does not suddenly change at the moment before and after the fault occurs, the steady state before the fault is utilized to solve and obtain an instant state variable value after the fault, and then an instant dq-axis current value after the fault and an instant current amplitude value after the fault are obtained; 4, performing first-order Taylor expansion on the constructed differential algebraic equation set at the solved post-fault instant state variable value and the dq-axis current value, and converting a nonlinear differential algebraic equation set model into a linear differential algebraic equation set; and 5, analyzing the fault current.

The invention relates to an active power control method and device of a pumped storage unit, computer equipment, a computer readable storage medium and a computer program product, which can be used in the technical field of electric power. The method comprises the following steps: acquiring a set active power value and a set capacity value of the pumped storage unit; determining a target active value according to the set active value and the set capacity value; determining the number of target operating units according to the target active value; determining a distribution active value according to the number of the target operation units and the target active value; generating a unit start-stop instruction corresponding to the number of the target operating units, and sending the unit start-stop instruction and the distributed active value to a control unit to control start-stop and active output of the pumped storage unit; according to difference information between the real active value and the distributed active value, an adjusting instruction of the pumped storage unit is determined; and sending the adjusting instruction to a control unit to adjust the active power output of the pumped storage group. By adopting the method, the efficiency of active control of the pumped storage unit can be improved.

The invention provides a wind-light-heat-storage large-scale new energy base frequency coordination control method, and belongs to the field of power system active power control, and the method comprises the steps: carrying out the simulation analysis based on a wind-light-heat-storage large-scale new energy base DC sending-out system through a photo-thermal power generation system dynamic model, and obtaining a wind-light-heat-storage large-scale new energy base frequency coordination control model; analyzing the frequency modulation energy of the network-following type energy storage and the network-constructing type energy storage, constructing a wind-light-heat storage frequency response model, performing difference analysis on the response speed, and performing off-line solution to obtain a frequency response characteristic table; frequency modulation resources under different operation conditions are researched, and a coordinated output relation is obtained; deviation calculation is carried out to obtain a real-time deviation result, strategy matching is carried out by utilizing a frequency response characteristic table, a frequency modulation strategy is obtained and optimized in combination with a coordinated output relation, and a completely distributed frequency control strategy is obtained; according to the invention, reliable interaction of heterogeneous resource operation states in the primary frequency modulation scale and reasonable distribution of power output are realized.

The invention relates to a wind turbine generator active power control method and system based on the lowest inertia demand of a power system, and belongs to the technical field of wind turbine generator power control methods. The method comprises the following steps: (1) estimating the minimum inertia demand of the power system under the transient frequency security constraint of the system; (2) hierarchical adaptive virtual inertia control strategies including wind power plant virtual inertia demand calculation, a wind power plant virtual inertia hierarchical control strategy and a single machine virtual inertia control strategy; and (3) applying the strategy in the step (2) to power system control. Coordinated frequency modulation among the wind power station, the traditional thermal power plant and multiple machines in the wind power station is realized, and the problem of secondary frequency disturbance caused by group modulation and group control rolling optimization and frequency modulation quitting is solved.

The invention discloses a safety control method and system for an emerging control main body, and belongs to the technical field of power system active control, and the method comprises the steps: carrying out the bidirectional data interaction through a master station AGC and a field station AGC, and carrying out the bidirectional data interaction based on a bidirectional data interaction result and a cooperative anti-error parameter; whether the emerging control main body is in a controllable state or not is judged in real time through collaborative security locking logic; if the control main body is in the controllable state, active measurement data of the emerging control main body are obtained, and jump detection and multi-source checking are carried out on the active measurement data; after verification is passed, a pre-control instruction is generated based on the control strategy, and reasonability verification and control effect simulation verification are carried out; and after the control effect simulation verification is passed, the pre-control instruction is taken as a final control instruction to be issued to the emerging control main body for execution. The method can greatly improve the safety control capability of AGC on an emerging control main body, guarantees the frequency operation safety of a power grid, and improves the safe and reliable power supply capability of the power grid.

Disclosed in the present invention are a control method and system capable of providing frequency support for a flexible interconnected power distribution network. The method comprises: using a permanent-magnet direct-drive wind turbine connected to a flexible interconnected power distribution network to provide frequency support, measuring a direct-current voltage of a grid-side converter of the wind turbine, calculating a per-unit value and the phase of the direct-current voltage, and calculating the amplitude of a modulation voltage; generating a trigger pulse signal; monitoring the rotation speed of a wind turbine rotor and the rotor position angle of a synchronous generator, and acquiring a per-unit value of optimal power; calculating an active power reference value; on the basis of active power control and current control, outputting a d-axis component and a q-axis component of a modulation voltage of a generator-side converter, and by means of rotating coordinate transformation, generating a three-phase modulation voltage in a stationary coordinate system; and generating a trigger pulse signal by means of a pulse width modulation stage. The present invention enables wind turbines to provide quick response for power distribution networks in a frequency support stage, and prevent rotation speed stalling and suppress secondary frequency drop in a rotation speed recovery stage, thereby improving the support capability of the wind turbines for power grids.

The invention discloses a method for improving stability of a network-forming converter by considering voltage and phase transients, which solves the problem of over-current control blind areas existing at the initial stage of a fault and at the moment of clearing in a traditional single current limiting method and overcomes the defect that the stability is sharply deteriorated when a traditional strategy is used for coping with a composite fault. The method comprises the following steps: S1, obtaining a virtual synchronous machine swing equation under a synchronous rotating coordinate system and an equivalent circuit model under the action of a circular current limiter; and S2, obtaining a nonlinear relation between the output power and the power angle of the converter, and analyzing a transient stability domain of the converter during a fault period. And S3, obtaining a mixed current limiting strategy, deducing an equivalent circuit model corresponding to the strategy, and further obtaining an output power expression corresponding to the strategy. And S4, obtaining a power damping term acting on an active power control loop, further obtaining a synchronization stability improvement strategy, and deducing a closed-loop model describing the system at the moment.

The invention provides a VSG transient support capability improvement strategy based on active deviation integral feedback. The strategy comprises the following steps: constructing a VSG active control loop based on active power deviation integral feedback; based on the VSG active control loop, calculating an integral feedback compensation value based on power deviation control; and based on the integral feedback compensation value, the limit fault clearing time is prolonged. According to the strategy provided by the invention, the power angle change rate of the VSG can be effectively inhibited in the fault process, the limit fault clearing time is prolonged, and the transient power angle stability is improved.

The invention discloses a distributed new energy active power regulation and control method, device and equipment and a storage medium, and is used for solving the technical problems that an existing distributed new energy regulation and control mode is low in accuracy and poor in self-adaptability and real-time performance. Comprising the following steps: calculating a distribution network voltage compensation vector by adopting voltage deviation values of all distribution network nodes and an inverse matrix of a voltage sensitivity matrix; equally dividing the whole network power regulation quantity according to the number of the distributed energy equipment accessed to the distribution network node to generate a main network demand regulation vector; performing weighted fusion on the main network demand adjustment vector and the distribution network voltage compensation vector to obtain a global active adjustment target vector; calculating an equipment adaptation index of the distributed energy equipment by adopting an equipment adjustment capability parameter of the distributed energy equipment, a dominant frequency component in a global active adjustment target vector, a main network real-time power margin and a voltage deviation value; and allocating the adjustment task in the global active adjustment target vector to the distributed energy equipment for execution by adopting the dominant frequency component and the equipment adaptation index.

The invention relates to the technical field of new energy station power control, and discloses a wind and light storage active power control method and system based on a whale optimization algorithm, and the method comprises the steps: obtaining the equipment parameters of all wind and light storage equipment, and generating the dynamic priority of all equipment in combination with the real-time operation state; the initial whale population is generated as a plurality of power distribution schemes, each whale represents a group of power distribution coefficients, and the sum of the distribution coefficients is 1; constructing a fitness function for calculating a fitness value based on a weighted error term determined by a dynamic priority and a device and system dual penalty term; executing a main optimization loop, dynamically adjusting a search strategy through a convergence factor, updating the whale position by combining a bubble attack strategy and a surrounding strategy, generating a distribution scheme meeting a preset constraint condition, normalizing the optimal whale position, and outputting a power distribution coefficient of each device; and according to the distribution coefficient and the total power instruction, generating a specific power instruction value of each device for controlling the active power of each device, so that dynamic adjustment can be performed in real time according to the operation state of the device and the demand of the system, stable operation of the system and effective output of energy are ensured, and economic benefits are improved.

The invention discloses a time sequence fault current-limiting control method and system compatible with a grid-connected guide rule for a network construction type doubly-fed wind turbine generator, and the method comprises the following steps: freezing external power control when a low-voltage ride-through event of a power grid is detected at the initial stage of a fault, and suppressing transient overcurrent through dynamically adjusting the resistance component of virtual impedance; in the fault stable stage, an electromotive force compensation increment is calculated on the basis of grid-connected guide rule requirements at the moment 4 tau after the fault occurs; in the fault clearing stage, after it is detected that the fault is cleared, electromotive force compensation is stopped; gradually recovering the virtual impedance to a rated value through the dynamic coefficient A; in the fault recovery stage, active control and reactive control are recovered in sequence, power output is recovered to the level before the fault within one second, and meanwhile the virtual impedance amplitude is gradually recovered to the rated value along with the voltage phase difference; the voltage phase jump amplitude and the voltage drop amplitude determined by the method have high robustness.

The invention relates to a virtual inertia-damping cooperative adaptive control method for a voltage source type direct-driven permanent magnet wind turbine generator. The method comprises the following steps: constructing a voltage source type direct-driven permanent magnet wind turbine grid-connected equivalent model; constructing a wind turbine generator frequency response model based on a dynamic coupling relationship between virtual inertia and virtual damping; collecting a frequency signal of a common connection point of a power grid, and carrying out collaborative optimization processing on the frequency signal by adopting a composite filter to obtain a virtual power increment; the active power reference value is introduced into an active power control loop of the grid-side converter; and controlling the power grid side converter after the additional power reference value is introduced by adopting a rotational inertia and damping coefficient adaptive control method based on a nonlinear function. According to the method, frequency steady-state deviation compensation and dynamic change rate correction can be realized, the frequency stability under wide-range disturbance can be improved through segmented nonlinear adjustment, and the requirements of unit active inertia response and power grid frequency stability are met.

The present invention discloses a method for self-clearing DC faults in a new energy island power grid transmission system. The sending end adopts a constant AC voltage and frequency control strategy, and there is only one receiving end that adopts a constant DC voltage control strategy, while the remaining receiving ends adopt a constant active power control strategy. At the same time, each pole of the flexible DC converter station at the sending end real-time detects the DC current flowing out of this pole, and each pole of the flexible DC converter station at the receiving end real-time detects the DC current flowing into this pole. After detecting the occurrence of a DC fault, the DC fault is automatically cleared according to their respective control strategies, and the energy balance of the sending end island is achieved in cooperation with the AC energy consumption at the sending end. It solves the technical problems of coordinated control between flexible DC and new energy, power surplus, and self-clearing of DC faults on the DC side, and improves the power regulation ability and system stability of the new energy island power grid transmission system.

The invention belongs to the technical field of power grid control, and relates to a transformer area flexible interconnection system three-phase imbalance control method and device and a medium. Taking the transformer area converter controlled by the PQ control algorithm as a target transformer area converter; collecting a first control parameter output by an active power PI controller of the target transformer area converter; based on the upper and lower limits of the voltage target value of the DC bus, performing amplitude limiting setting on the first control parameter of the target transformer area converter to obtain the voltage target value; subtracting the voltage target value from the actual voltage value of the direct-current bus, inputting the difference value into the PI controller, and outputting a second control parameter of the target transformer area converter; taking the second control parameter as a direct-axis current target value, subtracting the direct-axis current target value from a direct-axis current actual value, and taking the difference value as the input of a direct-axis current PI controller; and controlling the target transformer area converter based on the voltage modulation signal output by the PQ control framework. The scheme can effectively improve the power supply reliability of the power distribution area and stabilize the DC bus voltage.

The invention relates to the technical field of power systems, and discloses an active control method and related equipment for a distributed new energy station, and the method comprises the steps: receiving an active adjustment instruction issued by a main station through an edge gateway, verifying the active adjustment, and generating verified instruction data; dynamically selecting a control mode based on the verified instruction data and the real-time operation state of the new energy station, and adjusting the active power output of the power generation equipment according to the control mode; and triggering a corresponding safety protection strategy after detecting that the power grid operates abnormally so as to isolate the abnormities according to the safety protection strategy and maintain stable operation of the power grid. Accuracy, timeliness, flexibility and safety of active control of the distributed new energy station can be improved, stable operation in a complex and changeable power grid environment can be ensured, and stability and reliability of power grid operation are improved.

The invention relates to the technical field of offshore wind power grid connection, in particular to a low-frequency oscillation suppression method for an offshore wind power synchronous machine grid connection system, which comprises the following steps: acquiring inherent parameters of the synchronous machine grid connection system and active power reference instructions of each fan of an offshore wind power plant; according to the inherent parameters, control parameters of a preset damping controller are determined, and the damping controller is configured based on the control parameters; acquiring an actual operation frequency signal of the offshore low-frequency power grid in real time, and comparing the actual operation frequency signal with a preset rated frequency of the offshore low-frequency power grid to obtain a frequency deviation signal; inputting the frequency deviation signal into a configured damping controller, and outputting a damping power instruction; and superposing the damping power instruction and the active power reference instruction to generate an active power control instruction. According to the invention, the low-frequency oscillation of the new energy synchronous machine grid-connected system can be effectively suppressed, and meanwhile, the situation that the grid-connected safety is threatened due to the great fluctuation of the terminal voltage of the motor caused by suppression measures is avoided.

The invention discloses a control method, device, equipment, medium and product of a network-forming type permanent magnet wind power system, and the method comprises the steps: calculating the maximum wind energy tracking power outputted by the network-forming type permanent magnet wind power system under the optimal wind energy tracking based on the maximum wind energy tracking coefficient; calculating a direct-current voltage damping control coefficient of a side damping controller according to the inertia coefficient and the damping coefficient of the direct-current voltage; calculating an electromagnetic power reference value output by the permanent magnet synchronous generator according to the maximum wind energy tracking power and the DC voltage damping control coefficient; and subtracting the electromagnetic power reference value from the electromagnetic power actual value, and inputting the difference value into a machine side active power controller so as to adjust the electromagnetic power output by the permanent magnet synchronous generator. According to the method, on the basis of not adding hardware equipment, the transient stability of the grid-forming type permanent magnet wind power system during the short-circuit fault period of the power grid can be remarkably improved only by changing the control strategy of the machine-side converter of the grid-forming type permanent magnet wind power system.

The invention discloses an active power control method for a flyback topology micro inverter system, and the method comprises the steps: calculating the load power of a load end through a current sampling module, and carrying out the uniform power distribution of a PV primary side branch when the load power is greater than or equal to the rated power of an inverter system; when the load power is smaller than the rated power of the inverter system, the PV primary side branch is closed step by step according to the load power difference; and when the load power is smaller than the minimum set power sum, one PV primary side branch is kept to operate. When the load power is smaller than the minimum set power, all the PV primary side branches are closed, and when the load power is larger than the minimum set power of the PV primary side branch with the lowest minimum set power, the system is started. According to the invention, multi-path regulation and control can be realized, and the control stability of the system is improved. And uniform distribution control, step-by-step adjustment distribution control, minimum power control and active power control are relatively flexible and efficient, so that the service life of the system is remarkably prolonged, and the reliability of the system is remarkably improved.

The invention provides a distributed secondary control method for convergence of voltage frequency of an island alternating-current micro-grid within preset time, relates to the technical field of micro-grids, and describes a communication network among distributed power supplies in the island alternating-current micro-grid based on a graph theory. Based on an output frequency equation and a voltage amplitude equation of droop control in a primary control layer of the distributed power supply, and in combination with a communication network diagram, a frequency controller and an active power controller in a secondary control layer are respectively designed; the frequency of the distributed power supply is recovered to the rated value within the preset time, and meanwhile, the target of distributing the active power according to the proportion is achieved. And designing a voltage controller in the secondary control layer to achieve the target that the output voltage of the distributed power supply is recovered to a rated value within a preset time, so that the minimum upper bound of the voltage / frequency convergence time of the island alternating current micro-grid can be preset within any physical allowable range to adapt to different application requirements.

The invention provides an off-grid micro-grid adaptive frequency voltage secondary control method and device, and belongs to the technical field of power system operation and control. The method comprises the following steps: constructing a frequency control variable and a voltage control variable for secondary control of a controlled inverter in an off-grid micro-grid; based on the frequency control variable and the voltage control variable, respectively constructing interference-related dynamic linearization models of frequency and voltage secondary control of the micro-grid; and calculating an active power control instruction and a reactive power control instruction of the inverter based on the interference-related dynamic linearization model so as to realize secondary control of the frequency and the voltage of the micro-grid. According to the method, the efficiency, safety and flexibility of micro-grid voltage and frequency control under the scene of high renewable energy source permeability and incomplete model can be greatly improved, and the running safety and stability of the micro-grid are improved.

The invention relates to the technical field of wind power plant active power control, and discloses an active power control method and system for a wind power plant, and the method comprises the steps: obtaining the historical data of a fan, and constructing a training set according to a wake flow influence result of a fan state; based on an AdaBoost algorithm, constructing a strong classifier in combination with the training set; the method comprises the following steps: determining fans influenced by wake flow by using a strong classifier, determining upstream fans generating wake flow by using a wake flow center line deflection angle, and defining all wind turbine generators which are not influenced by wake flow and generate wake flow which does not influence downstream fans as a controllable fan group; and solving the wind turbine generator groups with the minimum number of execution actions in the wind power plant by utilizing a dynamic programming algorithm, and executing active power control operation. According to the method, the space-time coupling influence caused by the wake effect in the active power control process of the wind power plant can be eliminated, the environmental disturbance generated by the execution of the power control action of the fan to the wind power plant is reduced to the minimum, and the real-time accurate control of the active power of the wind power plant can be realized.

The invention discloses a frequency damping-based parameter identification method for active power control of a grid-forming photovoltaic converter, and the method comprises the steps: collecting the voltage and current of a grid-connected point, and obtaining a corresponding DC component after coordinate transformation; obtaining active power and reactive power output by the photovoltaic grid-connected converter and active power and reactive power after passing through a low-pass filter; outputting frequency and voltage amplitude through active power control and reactive-voltage droop control of frequency damping; and the voltage amplitude and the feedback deviation are sent to a voltage and current double closed loop, and a converter driving signal is generated through modulation. When parameter identification is carried out on an active power control equation based on frequency damping, an active power control model is discretized and then transformed into a difference equation; unknown parameters in the difference equation are identified, and active power control parameters are calculated. According to the method, frequency damping optimization enhancement in active power control of the grid-forming type photovoltaic converter can be realized, identification prediction of control parameters is realized, and the photovoltaic converter is enabled to operate more stably.