56 results about "Inertial control" patented technology

The present disclosure discloses a method for controlling coordinated operation of multiple wind generators to avoid secondary frequency drop. The method includes the following steps: first, the Doubly Fed Induction Generator (DFIG) required for frequency support is dynamically selected based on a real-time disturbance power of a power grid and the rotating speed level of each DFIG; second, the virtual inertial control parameters are adaptively regulated according to the system frequency and the change in the rotating speed of the DFIG participating in frequency support, ensuring that the frequency support requirements are satisfied; and finally, the remaining DFIGs are controlled to release the rotor kinetic energy to support the rotating speed recovery of the selected DFIG, so as to reduce the extra energy absorbed from the power grid in the process.

The invention discloses a self-adaptive virtual inertia control and power distribution method of an energy storage converter suitable for a multi-direct-current micro-grid. The method comprises the following steps: establishing a virtual direct-current motor control model; based on the virtual direct current motor control model, designing an adaptive virtual inertial parameter control and power distribution algorithm, so that the energy storage converter can simulate the inertia and damping characteristics of the direct current generator; constructing a small-signal model of the common DC bus of the multi-DC micro-grid, analyzing the influence of inertia and damping parameters on the dynamic performance and stability of the system, and drawing a Nyquist curve based on an impedance ratio criterion to optimize the inertia and damping parameters; and verifying the adaptability of the adaptive virtual inertial parameter control and power distribution algorithm in the multi-direct-current micro-grid, and realizing effective control on the bus voltage stability and the power distribution of the energy storage unit by adjusting the power response characteristic of the energy storage unit. According to the invention, the stability and response speed of the multi-direct-current micro-grid system are improved, the bus voltage fluctuation is effectively slowed down, and the service life of the energy storage unit is prolonged.

The invention discloses a frequency division frequency modulation control method and system for a power system containing an energy storage unit, and the method comprises the steps: building an energy storage power station comprehensive inertia control model based on an energy storage power station model; considering the influence of energy storage on frequency modulation continuous stability caused by charging and discharging, and establishing a self-adaptive frequency modulation control model considering the energy storage charge state; establishing a frequency response model of the power system based on a balance equation of a wind-light-water-fire power supply, an energy storage unit and a load in the power system; based on the response characteristics of the energy storage unit, establishing a frequency divider model; and comprehensively establishing a frequency control model considering frequency division frequency modulation of the energy storage power supply and other power supplies to realize frequency modulation control of the power system. The frequency modulation advantages that the energy storage unit is high in power supply response speed and can restrain high-frequency fluctuation are brought into play, the frequency response speed of the system is increased, and the frequency response capacity of the system is improved.

In one aspect, a wheel hub assembly including a wheel hub body having an interior, bearing assemblies to rotatably connect the wheel hub body to a spindle, and a vent associated with the wheel hub body that opens to the interior of the wheel hub body. The wheel hub assembly further includes an inertia-controlled valve of the vent rotatable with the wheel hub body. The inertia-controlled valve is configured to open in response to rotation of the inertia-controlled valve with the wheel hub body and permit air to flow out of the interior of the wheel hub body.

The application provides a wind power active support frequency modulation parameter optimization method for suppressing frequency drop, comprising the following steps: establishing a system model of a doubly-fed wind turbine connected to a power grid; determining frequency drop characteristics of the doubly-fed wind turbine when participating in power grid frequency modulation, wherein the doubly-fed wind turbine participates in power grid frequency modulation through a comprehensive inertia control strategy, and the frequency drop characteristics include primary frequency drop characteristics, secondary frequency drop characteristics and system frequency characteristics when the doubly-fed wind turbine exits power grid frequency modulation; selecting frequency modulation parameters to be optimized based on the frequency drop characteristics of the doubly-fed wind turbine when participating in power grid frequency modulation; and searching for optimal values of the frequency modulation parameters by using an improved particle swarm algorithm, wherein constraint conditions of the improved particle swarm algorithm include a coupling term of rotor safety and power output safety of the doubly-fed wind turbine. The frequency modulation parameters obtained by using the method provided by the application can effectively suppress the secondary frequency drop problem of the doubly-fed wind turbine when participating in power grid frequency modulation.

The invention relates to an energy storage battery self-adaptive cooperative primary frequency modulation control method based on SOC and frequency difference partition, and the method comprises the steps: obtaining a frequency deviation value, and calculating a frequency deviation change rate; comparing the frequency deviation value with the frequency modulation dead zone; judging and selecting virtual inertia control or negative virtual inertia control, and calculating output of a primary frequency modulation response stage; calculating droop control output in a primary frequency modulation response stage; and calculating the total output of the energy storage battery. According to the method, rapid response is performed aiming at the initial rate of frequency change, and rapid fluctuation of the frequency is effectively inhibited; the stability of the frequency recovery process is remarkably improved, smooth and continuous adjustment can be carried out according to the real-time system frequency requirement and the energy storage SOC level, the energy storage output process is more stable and more friendly, the frequency modulation power requirement is preferentially guaranteed under the frequency emergency condition, the frequency modulation capacity of energy storage can be fully exerted in the SOC normal interval, and the energy storage efficiency is improved. And the battery safety is guaranteed preferentially.

The invention relates to a frequency response analysis method for a wind power grid-connected system through MMC-HVDC (modular multilevel converter-high voltage direct current) based on H2 and H infinity norms. The method comprises the following steps: firstly, based on a small signal linearization theory, deducing a power frequency transfer function between active power variations of DFIG, MMC-HVDC and frequency modulation units of a synchronous generator containing a control system detailed model and frequency variations of a receiving end power grid, and establishing a system detailed frequency response model; obtaining a transfer function between the system frequency variation and the load disturbance quantity; secondly, analyzing the influence of the comprehensive inertia control parameters Kp and Kd, the virtual inertia time constant Hmmc of the converter station and the difference adjustment parameter R of the synchronous machine on the system frequency response characteristic of the detailed frequency response model of the established system based on the H2 and H infinity norm theory;

This invention provides an inertia estimation system, an inertia estimation device, a simulated inertia inverter, and a program that can calculate inertia in a power grid and control a simulated inertia inverter. [Solution] The inertia estimation system of the embodiment comprises an inertia estimation device and a simulated inertia inverter. The inertia estimation device comprises a measuring instrument database which includes at least the locations in the power system of measuring instruments that acquire measurement information used for inertia estimation, an inertia estimation unit which estimates the inertia in the power system, a setting calculation unit which calculates an inertia setting value to be set in the simulated inertia inverter, a communication unit which communicates the calculated inertia setting value, and an inertia calculation unit which calculates the inertia in the power system based on the inertia estimated by the inertia estimation unit and the inertia setting value. The simulated inertia inverter comprises a simulated inertia control unit which simulates the inertial operation of a generator, an inverter communication unit which receives the inertia setting value, and a constant setting unit which sets the inertia setting value in the simulated inertia control unit.

The application belongs to the technical field of structural vibration control, and relates to a mechanical-electrical clutch variable inertial damper, which is a semi-active damping device applicable to civil structures and used for inhibiting the vibration of the structure under the action of an earthquake or wind load. The device is realized by matching a mechanical inertial system, an electrical inertial system, an energy recovery control system and an active inertial mass control system. The application ensures that the device provides an inertial force in the acceleration stage of the structure and does not provide a force in the deceleration stage of the structure. The electrical inertial system can effectively reduce the design capacity of the mechanical inertial system, and in combination with the active inertial mass control system, the semi-active variable inertial control similar to bang-bang control can be realized, and in combination with the energy recovery control system, the kinetic energy of the flywheel can be recovered in the deceleration stage.

The invention provides a control method and device of an off-grid storage-free hydrogen production system, equipment and a medium, and relates to the technical field of new energy hydrogen production, and the method comprises the steps: obtaining a current output electrical parameter of an output side of a grid-forming photovoltaic inverter at a current moment, and a historical output electrical parameter of the output side at a previous moment of the current moment; if the current output electrical parameters meet the configured mode conversion conditions, virtual inertia control parameters are calculated according to the current output electrical parameters and historical output electrical parameters; based on the virtual inertia control parameter, determining a target output electrical parameter of the output side of the grid-forming type photovoltaic inverter at the next moment of the current moment; and based on the target output electrical parameters, controlling the grid-forming photovoltaic inverter to supply power to the hydrogen production power supply. The hydrogen production system is rapidly and stably started, the frequency and voltage deviation is reduced, and the hydrogen production efficiency is improved.

The application provides a temperature-controlled load frequency response comprehensive inertia control parameter design method. The method comprises the following steps: a temperature-controlled load is integrated into a frequency response model of a power system by using comprehensive inertia control; a frequency response frequency domain expression of the system is obtained; a design scheme is given for response delay, droop control parameters and virtual inertia control parameters by considering the dual constraints of system frequency stability and load regulation capacity; and the design scheme has great reference significance for additional frequency response control of the temperature-controlled load.

This application relates to the field of artificial bee colony algorithm technology, providing a method and system for optimizing energy storage frequency regulation strategies based on the artificial bee colony algorithm, addressing the problems of slow suppression speed and low stability of power grid frequency fluctuations. The method includes: acquiring power grid frequency deviation data under load abrupt changes, extracting frequency change characteristics through sliding time window processing, and performing extreme value normalization to form a standard fluctuation sequence characterizing the dynamic characteristics of the frequency. After converting this sequence into an initial power compensation demand signal, phase compensation preprocessing is performed to obtain an optimized power compensation signal. A parameter optimization model is established with virtual inertial control parameters as optimization variables, and the optimal parameter combination is obtained by iteratively solving using the artificial bee colony algorithm, thereby constructing a frequency-power mapping function. Based on the mapping function, an adaptive virtual inertial control strategy is formed, and after processing the power compensation signal, an energy storage output command is generated. This application improves the suppression speed and stability of power grid frequency fluctuations.

The present disclosure relates to curtailment control technology for photovoltaic power generation, and more particularly, to a gridforming type curtailment control system and method in link with a photovoltaic inverter. According to the present disclosure, inertia control that cannot be performed in existing photovoltaic inverters may be performed more continuously in link with a gridforming inverter, thereby having an effect of efficiently managing and utilizing existing photovoltaic inverter facilities.

The invention discloses a sending-end power grid frequency characteristic analysis method, system and device considering multiple dead zones and multiple control modes and a medium, and belongs to the technical field of power system planning operation. Constructing a droop control model of the new energy, a virtual inertia control model, rotor motion models under a plurality of synchronous units, a second-order speed regulation system model, a frequency regulation model of a load, a set value of a primary frequency modulation dead zone of the synchronous units, a direct current frequency limit control model, a dead zone set value and virtual inertia control of a direct current sending part; identifying parameters of the synchronous unit speed regulation system through a time domain simulation method; establishing a power grid frequency response model; and analyzing frequency characteristics and influence factors of the sending-end power grid by adopting a Routh criterion and a root locus method. The auxiliary sending end power grid planning operation provides decision support for a new energy control mode and a control mode of a direct current power transmission system.

The present invention discloses a wind power frequency modulation step-by-step inertia control method based on deep learning. This method mainly includes the following three steps: 1) Obtain the optimal wind power frequency modulation step-by-step inertia control parameters using the Golden Eagle optimization algorithm in time-domain simulation and generate a data set; 2) Extract features from the data set based on a stacked denoising autoencoder; 3) Generate an optimal wind power frequency modulation step-by-step inertia control scheme by learning data features based on a deep neural network. The present invention can quickly and accurately provide the optimal wind power frequency modulation step-by-step inertia control scheme under the current system when power imbalance occurs in the power system; it can prompt the wind farm to actively provide power support for the power system, effectively participate in the power system frequency control, timely suppress the system frequency drop, is beneficial to compensating for the system inertia, effectively improves the quality and efficiency of wind power frequency modulation, provides an important scheme for power system planning and decision-making work, and has great significance for the safety and stability of power system operation.

In one aspect, a wheel hub assembly including a wheel hub body having an interior, bearing assemblies to rotatably connect the wheel hub body to a spindle, and a vent associated with the wheel hub body that opens to the interior of the wheel hub body. The wheel hub assembly further includes an inertia-controlled valve of the vent rotatable with the wheel hub body. The inertia-controlled valve is configured to open in response to rotation of the inertia-controlled valve with the wheel hub body and permit air to flow out of the interior of the wheel hub body.

The invention discloses a control method, device and equipment for an energy storage converter of an electric vehicle charging station and a medium, and the method comprises the steps: measuring reactive power and actual voltage through a voltage regulation module, and obtaining reference voltage; inputting the reference voltage into an inertia control module, and determining a reference frequency through the inertia control module based on Q-V droop control; the reference voltage and the reference frequency are sent to a double-layer current and voltage inner loop controller, and the output voltage is determined through the double-layer current and voltage inner loop controller; the output voltage is input into a DC / DC module, a battery charging and discharging instruction is determined through the DC / DC module based on P-f droop control, and the two-stage electric vehicle charging station energy storage converter is controlled through the battery charging and discharging instruction. According to the invention, Q-V droop control is utilized by the inertia control module, the output frequency is adjusted according to the deviation of the DC link voltage, and a power grid is supported through capacitance inertia in a network construction mode; and the DC / DC module detects the DC link voltage deviation, and the voltage proportion controller realizes P-f droop control to ensure that the DC link voltage is adjusted within an allowable safety range, so that the energy storage converter can adjust energy storage and energy release in time when the power demand changes, and the energy storage efficiency is improved. And instability and unreliability of power supply are improved.

The invention discloses an SOC adaptive constraint double-layer fuzzy primary frequency modulation control method, which comprises the following steps: S1, analyzing a control model of an energy storage system responding to system primary frequency modulation, and respectively using virtual droop control, virtual inertia control and virtual negative inertia control to cooperate with output for different output stages; s2, designing double-layer fuzzy control containing a system fluctuation state and SOH (state of health), and performing depth constraint on energy storage units of different SOHs; s3, designing different SOC constraint outputs by adopting a piecewise function; and S4, performing frequency modulation control through SOH double-layer fuzzy control and SOC constraint output. According to the method, output coefficients of system fluctuation and SOH constraints are determined by adopting double-layer fuzzy control; and meanwhile, the real-time SOC of the energy storage unit is considered, the output depth is adjusted by adopting a piecewise function, the response capability is improved, and energy storage over-charging and over-discharging are avoided.

The invention provides a new energy vehicle safety power connection device, and relates to the technical field of vehicle power connection, the new energy vehicle safety power connection device comprises a power connection installation part, and the power connection installation part is provided with an inertia control device; a safety separation part is slidably mounted on the power connection mounting part; the safety separation piece is attached to the inertia control device; the inertia control device is used for controlling power connection and power failure between the safety separation part and the power connection installation part. By means of an inertia detection structure, all-directional detection work of vehicle collision can be achieved, the failure rate is low, reliability is higher, detection work can be achieved without electric power, the detection work is not affected by the electric power condition, short circuit of a circuit is prevented, and the detection efficiency is improved. The problems that according to an existing new energy vehicle power connection device, power connection protection work without electrical signal control cannot be achieved conveniently, power connection safety depends on electronic devices, and power connection safety control work in all aspects around the vehicle cannot be achieved conveniently are solved.

The application provides a kind of data-driven based multi-area power grid energy storage adaptive virtual inertia control method and related device, comprising: establishing at least two regional power grid models;Adopt the deep Q network improvement algorithm under the competition framework to adjust the inertia constant of the virtual inertia control unit of two regions, establish the action space required for Dueling DQN agent, state space and reward function establish target loss function, the neural network parameters of Dueling DQN agent are iterated, L1 parameter norm penalty term is introduced to improve the target loss function, improve the generalization ability of Dueling DQN agent.The inertia constant in the virtual inertia control unit of different regions can be adaptively adjusted, the reasonable compensation of inertia power in different scenarios and the cooperation between multi-area energy storage are realized, and the stability of multi-area power grid is improved.

The invention relates to the technical field of artificial bee colony algorithms, provides an energy storage frequency modulation strategy optimization method and system based on an artificial bee colony algorithm, and solves the problems of low suppression speed and low stability of power grid frequency fluctuation. The method comprises the following steps: acquiring power grid frequency deviation data under a load sudden change working condition, extracting frequency change characteristics through sliding time window processing, and performing extreme value normalization to form a standard fluctuation sequence representing frequency dynamic characteristics; and after the sequence is converted into an initial power compensation demand signal, phase compensation preprocessing is carried out to obtain an optimized power compensation signal. Establishing a parameter optimization model taking virtual inertia control parameters as optimization variables, performing iterative solution by adopting an artificial bee colony algorithm to obtain an optimal parameter combination, and constructing a mapping function of frequency and power according to the optimal parameter combination. And forming a self-adaptive virtual inertia control strategy based on the mapping function, and generating an energy storage output instruction after processing the power compensation signal. According to the invention, the suppression speed and stability of power grid frequency fluctuation are improved.

The present invention discloses a transient adaptive virtual inertia control method for a battery in a DC microgrid. The method comprises determining a system operating condition based on the DC bus voltage of the microgrid and its rate of change, determining an inertia compensation requirement and designing a virtual capacitor input amount based on the system operating condition, determining a droop coefficient increment based on the accumulated power on the source side and the virtual capacitor requirement, and influencing the transient duration after load fluctuation by adjusting the battery power output in real time. When the absolute value of the DC voltage deviation gradually increases, the virtual capacitor adaptive term provides stronger inertia support for the system. When the absolute value of the DC voltage deviation gradually decreases, the virtual capacitor adaptive term reduces the influence of the constant virtual capacitor and accelerates the voltage recovery speed, thereby providing the DC microgrid with flexible virtual inertia support capability and effectively improving the voltage quality and dynamic characteristics of the system.

The invention relates to the technical field of circulating water pumps, in particular to an anti-inversion circulating water pump which comprises a pump body, a water inlet pipe is arranged at the top of the pump body, one end of a middle shaft is in running fit with the inner wall of the pump body, and the other end of the middle shaft sequentially penetrates through the pump body and a protective cover and then is fixed to the output end of a motor. The motor is fixed with the inner wall of the protective cover; at least one group of impellers is arranged in the pump body and is fixed with the periphery of the middle shaft, a limiting assembly is arranged on the surface of the middle shaft in the protective cover, when the water pump rotates reversely, the limiting assembly is fixed with the protective cover, and the limiting assembly is controlled by inertia, so that manual control of a user is not needed; when the water pump rotates reversely, the middle shaft can be automatically locked, and the water pump is prevented from rotating reversely.

An example apparatus for controlling one or more inverters is provided herein. In some embodiments, the apparatus for controlling one or more inverters may include one or more controllers. In some embodiments, each of the one or more inverters is associated with at least one power source. In some embodiments, each of the one or more controllers may configured to provide droop control, voltage magnitude control, phase control, frequency control and inertia control for an associated inverter of the one or more inverters. In some embodiments, each of the one or more controllers comprises a voltage control loop, a virtual inertia control loop, and a droop control loop enabling the power supplies to sync with a power grid and / or other power supplies when the power supply is disconnected from the power grid and / or other power supplies and / or connected to a power supply to the power grid and / or other power supplies.

The invention discloses a threshold optimization method, system and equipment for an inerter control strategy and a medium. The method comprises the following steps: determining influence factors about control frequency in the inerter control strategy; according to the distribution condition of inertia force in the inerter control strategy, determining a key threshold value for intervening the change of the influence factor; performing simulation analysis on the influence rule of the key threshold value on the vibration damping performance of the suspension system, and determining the value range of the key threshold value according to a simulation analysis result; executing an inerter control strategy according to the key threshold value in the value range; through optimal control of the inertia force threshold value, useless inerter switching frequency in an inerter switch control strategy is reduced, high control frequency is avoided, loads of inerter and damping elements are reduced, the service life of the elements is prolonged, the stability of the elements is improved, the control effectiveness and the engineering applicability of the control strategy are improved, the defects in the prior art are overcome, and the method is suitable for popularization and application. And the method has a relatively high application value.

This invention relates to the field of frequency control technology for new energy systems, and particularly to a method and system for online identification and evaluation of virtual primary frequency regulation for wind and solar turbine units. The method includes: determining the steady-state output power benchmark, maximum available power, and reserve capacity of the doubly-fed induction generator (DFIG) and photovoltaic (PV) units; collecting frequency data and active power data at the grid connection point and preprocessing them to obtain time-series data; dividing the time-series data into stages, and identifying the actual effective parameters corresponding to the virtual primary frequency regulation control components online during the steady-state frequency regulation stage; identifying the actual effective parameters corresponding to the virtual inertial control components online during the transient inertial stage; and evaluating the validity of the parameters based on the actual effective parameters, reserve capacity, and controller preset parameters to determine whether the DFIG and PV units have entered a power saturation state. This invention effectively solves the problem that existing new energy units easily enter a power saturation state under large disturbance conditions, causing theoretical control parameters to fail to reflect actual frequency regulation capabilities.

This invention provides a method, system, equipment, and medium for frequency regulation optimization control of a wind-storage combined power station. During primary frequency regulation, the system releases rotor kinetic energy through virtual inertial control of the wind turbine to dampen frequency drops during the inertial response phase. Energy storage compensates for the later-stage power output decline of the wind turbine and avoids secondary frequency drops caused by the wind turbine, effectively improving the frequency response characteristics of the system during primary frequency regulation. During secondary frequency regulation, aiming to minimize the cost of automatic power generation control involving the frequency-regulating power source, reference values ​​for wind turbine power variation and energy storage power variation are determined. Secondary frequency regulation control is then performed based on these reference values, taking into account not only the state of charge of the energy storage power station itself but also coordinating with the wind turbine's operating conditions in real time. This extends the lifespan of the energy storage while improving the dynamic frequency characteristics of the system.

The invention discloses a steering control method, a related device and a vehicle, and relates to the field of vehicle control. If it is judged that the control rotation direction is inconsistent with the target rotation direction and the actual rotation direction of the rear wheel is inconsistent with the target rotation direction, whether safety risks exist or not is judged based on the deviation value and a second deviation threshold value, and if the control rotation direction is consistent with the target rotation direction, the safety risks exist. When the actual rotating direction of the rear wheel is inconsistent with the target rotating direction, namely, the rear wheel is running towards the target position by overcoming the inertia control of the actuator, whether a safety risk exists or not is judged according to a deviation value between the actual rotating angle of the rear wheel and the target rotating angle represented by the target steering instruction and a first deviation threshold value; the first deviation threshold value is greater than the second deviation threshold value. The judgment threshold value of the rear wheel steering controller is properly prolonged, and the situation that the front impulse generated by an actuator exceeds the preset monitoring threshold value due to rapid reversing operation, and consequently the rear wheel steering controller enters a safe state unexpectedly is avoided.

Self-locking seatbelt retractor with -a belt winding shaft (1) rotatably mounted in a frame (2) that can be permanently attached to a vehicle, and -a locking system (3) for the belt winding shaft (1) that is controlled at least by the vehicle, in which, in the event of triggering, a vehicle-sensitive sensor mass (5) moves a locking lever with its engagement tip into engagement with a toothing (9) of a control disc (4) into a trigger position, thereby stopping the control disc (4) in its common rotational movement with the belt winding shaft (1) and activating the locking system (3), wherein -the sensor mass (5) is arranged in a carrier part (6) on a support surface and, in the event of vehicle accelerations, is inertially controlled from a neutral position to the trigger position in the carrier part (6) on the support surface, wherein -the carrier part (6) with the sensor mass (5) arranged therein is arranged in a housing (11) comprising the control disk (4) with a first ring toothing (13), wherein -a fastening ring (12) with a second ring toothing (14) is provided, and -the housing (11) with the carrier part (6) and the sensor mass (5) arranged therein can be attached to the belt winder in different rotational angle positions relative to the control disc (4) by means of an engagement of the first ring toothing (13) with the second ring toothing (14) of the fastening ring (12), wherein -the fastening ring (12) has at least one first fastening projection (16) with which it is attached to the frame (2) of the belt retractor, and -the retaining ring (12) has at least one second retaining projection (17) to which the housing (11) is attached by an engagement of the first ring toothing (13) with the second ring toothing (14), characterized in that -the second fastening point (17) is formed by an annular radially projecting collar, and -the housing (11) has one or more locking edges (7) with which the housing (11) is positively locked to the collar, and -the housing (11) has a first ring wall (8) encompassing the fastening ring (12) with several recesses (10), and -the locking edges (7) are formed by radially inwardly directed projections of the first ring wall (8) in the area of ​​the recesses (10), and -the housing (11) has a second annular wall (20) which defines an annular space (21) to the first annular wall (8), into which the retaining ring (12) with the first ring toothing (13) projects.

The invention discloses a frequency modulation method and device for a doubly-fed fan, equipment and a medium, and the method comprises the steps: carrying out the lag compensation of a variable pitch system of a wind turbine generator through a Smith estimation controller, and obtaining an improved variable pitch system; introducing a fuzzy control rule into the comprehensive inertia controller of the wind turbine generator to obtain an optimized comprehensive inertia controller; and performing frequency modulation on the wind turbine generator based on the improved variable pitch system and the optimized comprehensive inertia controller. On one hand, the Smith pre-estimation control is introduced to improve the variable pitch system of the wind turbine generator, the Smith pre-estimation control can effectively compensate the hysteresis characteristic of the variable pitch system, and the response speed of frequency modulation energy is increased; on the other hand, the fuzzy control rule is introduced into the comprehensive inertia controller to optimize the comprehensive inertia controller, and self-adaptive adjustment of control parameters in the comprehensive inertia controller is achieved. Through the optimization and synergistic effect of the two kinds of control, the frequency modulation effect of the wind turbine generator is effectively improved, and the stability of an operation system of the wind turbine generator is improved.