109 results about "Voltage oscillation" patented technology

The utility model discloses a lightning protection circuit and a power converter, and relates to the technical field of power electronics. According to the lightning protection circuit, for the condition that a capacitor parallel branch in a bus capacitor circuit comprises a first capacitor, a second capacitor and an inductor, and the first capacitor is connected with the inductor in series and then connected with the second capacitor in parallel, a lightning protection device is arranged to be connected with the inductor in parallel; in the lightning stroke process, the voltage at the two ends of the inductor exceeds the action voltage of the lightning protection device, so that the lightning protection device is broken down, and the voltage at the two ends of the inductor is clamped at the voltage drop after the lightning protection device is broken down, so that overlarge voltage cannot be formed on the second capacitor; therefore, the problem of voltage oscillation caused by current backflow at the lightning stroke moment can be weakened, the voltage stress borne by a corresponding power device in a post-stage circuit is reduced, and the corresponding power device is effectively protected.

The invention discloses a power semiconductor device and a manufacturing method thereof. The device comprises a first base region, a second base region, a field stop region, a plasma storage region and a bottom doped region which are sequentially arranged from top to bottom, wherein a top P region and a terminal field limiting ring are arranged in the first base region. Wherein the first base region is used for optimizing the terminal structure; the second base region is used for improving a self-clamping function and adjusting power consumption and static breakdown voltage; the field termination region is used for terminating an electric field and suppressing current and voltage oscillation; the plasma storage area is used for expanding the safe working area and improving the self-clamping function. By optimizing and compromising the structural parameters of each area, the device can achieve the beneficial effects of self-clamping, low loss, wide safe working area and small terminal size.

The invention discloses a multi-agent-based virtual power plant layered voltage coordination control system and method, and relates to the technical field of coordination control, and the method comprises the steps: obtaining the original operation data of a distributed energy unit in a virtual power plant, and constructing a dynamic mapping model representing the relation between node voltage and control input; decomposing the dynamic mapping model into a fast dynamic sub-model and a slow dynamic sub-model; generating a fast loop control law based on the fast dynamic sub-model, and performing residual calculation and online correction on the slow dynamic sub-model according to the fast loop control law; establishing a global optimization objective function according to the corrected slow dynamic sub-model, and solving a reference value of each node through a distributed algorithm; issuing the node reference value to a local inverter, and generating a control input signal in combination with a fast loop control law; according to the method, the problems of voltage oscillation, tracking errors and slow convergence caused by virtual power plant fast and slow control conflicts are solved through fast and slow dynamic layering cooperative control.

The invention relates to the technical field of ship electric energy storage, and discloses a ship distributed electric energy storage and distribution balance control system which comprises a plurality of distributed storage units, a direct current bus, a plurality of power conversion modules and a dynamic balance control module. The dynamic balance control module is used for collecting the voltage deviation value of the direct current bus and the current response rate and the charge state parameter of each storage unit and determining a transient charge deviation compensation value, and the system determines the transient power flux of each node according to the current response rate and the charge state parameter. And dynamic linear calibration of feedback gain is realized based on the charge deviation compensation value so as to adjust the power output flow rate of each storage unit, the charge throughput of the direct current bus is balanced through real-time hedging of the surplus or deficient state of the transient charge of the bus, voltage oscillation during ship propulsion load switching is effectively inhibited, and the reliability of the ship propulsion load switching is improved. And the transient stability of the bus voltage is maintained.

The invention discloses a control method and equipment for a full-control device clamping circuit, and relates to the technical field of full-control device clamping circuits, and the method comprises the steps: determining a product of a reflection voltage oscillation period and a time coefficient, and enabling the product to be a reference time interval of a corresponding bridge arm; in a same-bridge-arm inner and outer tube double-turn-on scene or a same-bridge-arm inner and outer tube double-turn-off scene, acquiring an instantaneous current of a current bridge arm; determining an actual time interval according to the reference time interval and the time interval adjustment amount; and controlling the current bridge arm based on the actual time interval. The current bridge arm is controlled by determining the actual time interval through real-time adjustment, overvoltage of a full-control device is prevented, the reflection voltage of the load end is reduced, and insulation of the load and the electric wire is protected.

The invention provides a permanent magnet direct drive fan bus voltage oscillation suppression method after power grid fault recovery, and belongs to the technical field of permanent magnet direct drive fans. The technical problem of DC bus voltage oscillation after symmetric fault recovery is solved. According to the technical scheme, the method comprises the following steps that S1, the power difference value P between a computer side and a network side during a fault period and the maximum unbalanced power Pmax absorbed by the rotational inertia of a fan rotor are included, if P is smaller than or equal to Pmax, the step S2 is executed, and if P is larger than Pmax, the step S3 is executed; s2, controlling a direct-current bus voltage outer ring by a grid-side converter, and turning to S5; s3, a DC bus voltage outer ring is controlled by a fuzzy PI adaptive controller; and S4, carrying out fuzzy processing. According to the invention, adaptive adjustment of DC bus voltage outer loop PI parameters is realized, the dynamic response capability is enhanced, voltage oscillation is effectively suppressed, and the stability is improved.

The invention relates to the technical field of systems for adjusting electrical variables, and discloses an automatic adjusting system for voltage fluctuation in an electroplating process, and the system comprises a feature extraction module which is used for obtaining an original sampling signal of voltage transient change of a controlled load end and extracting voltage differential information; the logic damping operation module is used for generating a logic compensation instruction according to the voltage differential information and a preset logic damping operator; and the pulse width modulation instruction reconstruction module is used for reconstructing a carrier phase and a placeholder edge time sequence according to the logic compensation instruction to correct the duty ratio. Virtual damping vectors with opposite polarities are implanted into a digital control loop, so that the output voltage generates a damping response which is subjected to exponential attenuation along with time to suppress transient voltage oscillation; according to the method, high-frequency ringing signals caused by coupling of parasitic parameters of the power transmission line and equivalent impedance of the controlled load are eliminated, and the voltage stability of the controlled load group during frequent switching of multiple task positions is guaranteed.

The invention belongs to the technical field of converter stability analysis and control, and discloses a new energy converter low-pass control dominated voltage oscillation parameter feasible region construction method, system and equipment and a medium, so as to solve the problem that accurate description of a system stability boundary is difficult to realize in the prior art. The method comprises the following steps: establishing a converter grid-connected system model considering low-voltage ride-through control, and generating a data set comprising a multi-parameter combination and a corresponding repeated low-voltage ride-through state tag based on the model; taking the data set as training data, and training the repeated low-crossing risk discrimination model by adopting a fast kernel learning algorithm to obtain a trained model; and inputting converter grid-connected system parameters needing to be analyzed into the trained model for classification prediction, and drawing a parameter region without repeated low-voltage crossing based on a result to obtain a multi-parameter feasible region schematic diagram. According to the method, the technical blank of carrying out accurate quantification and visualization on the repeated low-penetration stable boundary in a complex parameter scene is filled.

The present invention relates to the field of voltage control technology, and specifically to a wind power cluster multi-station reactive voltage collaborative control device and method, the device comprising: an AVC master station, responsible for the overall voltage optimization control of the system; an AVC cooperative control substation, located between the AVC master station and the AVC substation, receiving the voltage control instructions sent by the AVC master station, converting the voltage control instructions into reactive instructions, and sending them to each AVC substation for execution; the AVC substation, receiving the reactive instructions sent by the AVC cooperative control substation, controlling the reactive sources in their respective areas, and performing closed-loop control of the voltage target value; a parameter control system, which uses two sets of control parameters to respectively apply the control requirements of the same application scenario and switch the control parameters. Through the present invention, the problems of voltage oscillation and control difficulty caused by the large discreteness of the response time in the prior art are effectively solved, the response speed of the system and the stability of voltage control are improved, and it is adapted to different wind farm layouts and control requirements.

The invention relates to the technical field of power distribution network intelligent regulation and control, and discloses a stock area charging load dynamic matching and balancing method, device and medium, and the method comprises the steps: dividing a stock area into a plurality of local control sub-areas according to topological information, constructing a low-delay communication link according to communication delay parameters, calculating the average communication delay, and calculating the average communication delay; carrying out delay compensation on the voltage sampling sequence and the charging load power sequence to obtain a voltage trend quantity and a load power trend quantity, carrying out dynamic matching adjustment on the local control subarea to obtain a voltage trend quantity mean value and power distribution data, and carrying out global asynchronous coordination control on the local control subarea to obtain power distribution data; and performing oscillation detection and damping control on the updated voltage, and adjusting distribution according to the control voltage and the load power to generate a global dynamic balance state. Under the condition that communication delay and node coordination are inconsistent, secondary voltage oscillation is reduced, the frequency of voltage fluctuation and power reverse impact is reduced, and the dynamic stability is improved.

Embodiments of the application disclose a direct-drive wind turbine low-voltage ride-through control method and related equipment. The method comprises: generating a ride-through high-level signal to activate a low-voltage ride-through mode when a low-voltage ride-through trigger module detects that a current voltage value of a target power grid where a target direct-drive wind turbine is located is lower than a preset reference value; calculating a voltage drop depth according to the current voltage value and the preset reference value; a low-voltage period reactive power control module of a grid-side control system controls the target direct-drive wind turbine to output reactive power to the target power grid to support the power grid according to the voltage drop depth; and an active power control module of a machine-side control system controls output power of the target direct-drive wind turbine according to the voltage drop depth. The direct-drive wind turbine low-voltage ride-through control method overcomes the direct-current voltage overvoltage oscillation defect of the prior art and limits the machine-side electromagnetic power during the wind turbine low-voltage ride-through period from the source.

The present invention relates to a grid-connected control method for an active damping LCL inverter based on capacitor current negative feedback, which includes a voltage outer loop plus a capacitor current inner loop control, and in the process of switching between grid connection and off-grid connection, switching into grid voltage full feedforward control of the grid-connected inverter to offset grid voltage disturbances. The capacitor current feedback active damping method has lower additional losses and output current total harmonic distortion in the inverter output power. In actual power grids, in addition to the power frequency fundamental component, the grid voltage also contains a large number of low-order harmonics. The grid voltage harmonics also cause the grid-connected current to generate harmonics. The influence of the grid voltage on the grid-connected current can be suppressed by proportional feedforward, first differential feedforward, and second differential of the grid voltage. In order to reduce the distortion of the filter capacitor voltage during the switching between grid connection and off-grid connection, the grid current reference can be linearly reduced to zero within the time required by the specification to cope with the adverse situation of the inverter switching from grid-connected full load to independent no-load. The above method has a very obvious effect in suppressing load voltage oscillation.

The invention discloses a fuel cell response test method, which is characterized by comprising the following steps of: carrying out rapid variable load test: simulating 0-100% rated power step change, and recording voltage oscillation, local hot spots and water logging phenomena; a start-stop cycle test: high-frequency on-off of hydrogen / air supply is carried out, and the oxidation-reduction attenuation characteristic of the catalyst is evaluated; and transient disturbance test: superposing current fluctuation of random frequency, and analyzing the dynamic evolution rule of the pile impedance spectrum. The invention has the following advantages: 1, a gas supply rapid following mode is provided; 2, a high-precision dew point controllable technology is provided; and 3, a high-precision simulation actual road condition load mode is provided.

The utility model relates to the technical field of electronic equipment power supply, in particular to an electronic equipment power supply circuit based on a USB (Universal Serial Bus) interface, which comprises a power supply connecting end, a reference power supply connecting end, a voltage comparator, a reference voltage generator, a trigger, a power switch and a voltage output end, wherein the power supply connecting end is respectively connected with the voltage comparator, the reference voltage generator and the power supply switch; the voltage comparator is connected with the trigger through the first switch, the trigger is connected with the power switch through the second switch and the third switch in sequence, and the power switch is further connected with the voltage output end. The reference power supply connecting end is arranged on a line between the voltage comparator and the reference voltage generator, and the reference power supply connecting end is further connected with the first switch, the trigger and the second switch. Through the logic control of the voltage comparator and the trigger, the circuit is ensured to stably supply power to equipment in a proper current mode, and the adverse effect caused by the oscillation of the input voltage is avoided.

The invention discloses a direct-current converter for oscillation suppression and surplus power absorption and a control method thereof, and relates to the technical field of direct-current power transmission and distribution, a function module unit is formed through the parallel design of an oscillation suppression subunit and a power absorption subunit, and then a function module is formed through cascading the function module unit. And the function module and the starting module are connected in series to form the direct-current converter for oscillation suppression and surplus power absorption. By adopting the embodiment of the invention, accurate suppression of direct current voltage oscillation and efficient absorption of surplus power can be integrated, and safe, stable and reliable operation of a direct current power transmission and distribution system is ensured while hardware cost and space occupation are reduced.

An oscillator comprises a reference current generating circuit, a voltage modulator circuit and an oscillating circuit. The reference current generating circuit is used for generating a reference current. The voltage modulator circuit is configured to receive a feedback voltage and perform a voltage modulation operation according to a first reference voltage and the feedback voltage to generate a modulated voltage. The oscillation circuit is coupled to the reference current generating circuit and the voltage modulator circuit and is used for generating an oscillation signal with an oscillation frequency according to the reference current and the modulated voltage.

The application discloses a voltage-controlled oscillator and electronic equipment, the voltage-controlled oscillator comprises a sampling module, a voltage lifting module and an oscillator module; the sampling module is connected with the voltage lifting module, and the voltage lifting module is connected with the oscillator module; wherein the sampling module is used for inputting a clock signal and maintaining a voltage unchanged during a low voltage period of the clock signal; the voltage lifting module is used for lifting an input voltage signal; the oscillator module comprises a frequency control unit and an inverter chain; the frequency control unit is used for controlling an oscillation frequency and performing a one-phase transformation on a signal; the inverter chain is used for performing a signal delay and inversion; and the inverter chain comprises a plurality of inverter devices connected in sequence. The voltage-controlled oscillator does not need to use a power supply voltage as a control voltage, the oscillation amplitude is more stable, and sampling application can be conveniently and efficiently realized. The application can be widely applied in the technical field of electronic equipment.

Embodiments of the present application provide a power grid control method and device, electronic equipment, storage medium and program product. It relates to the technical field of new smart grid control. The method comprises: acquiring a first voltage and a first current of a first power grid, the control system of the first power grid comprising a plurality of voltage control devices; determining a first parameter of the first power grid based on the first voltage and the first current, the first parameter being used to indicate the strength of the first power grid; adjusting a second parameter of the plurality of voltage control devices based on the first parameter, the second parameter being used to indicate the suppression capability of voltage disturbance and the attenuation capability of voltage oscillation of the first power grid, the first parameter being negatively correlated with the second parameter; and controlling the first voltage based on the adjusted plurality of voltage control devices. The stability of the power grid system in a weak power grid can be improved.

The invention relates to the technical field of power distribution area voltage regulation and control, in particular to a power distribution area voltage treatment method in an uninterruptible power supply scene. According to the method, disturbance intensity is obtained according to a prediction residual error of voltage data at each time point and is used for representing load unpredictability of a current power distribution area working condition; a voltage offset risk indicator is further obtained based on the distribution of the voltage in the dead zone range. The adjustment cost of the two modes is determined based on the disturbance intensity and the voltage deviation risk index, the adjustment cost of the OLTC is further adjusted based on the working condition change rate, and then an effective adjustment mode instruction is selected. According to the method, dynamic and optimal distribution of functions of the voltage regulating equipment is realized, voltage oscillation possibly caused by equipment action conflicts originally is converted into a stable and ordered control right handover process, voltage treatment is completed on the premise that secondary disturbance is not introduced, and the voltage regulation efficiency is improved. And the core requirements of the uninterrupted power supply scene on the continuity and the stability of the power supply process are directly met.

The utility model relates to a kind of igniters, comprising: the connector for taking electricity from USB device, with the connector voltage-boosting oscillation circuit, with the output end of the voltage-boosting oscillation circuit is connected for producing electric arc electrode;Wherein, the voltage-boosting oscillation circuit includes high-frequency transformer, MOS switch and PWM controller;The high-frequency transformer includes primary winding and secondary winding, the primary winding is powered by the connector;The MOS switch is connected with the primary winding in series;The PWM controller is by control the MOS switch to make the circuit of the primary winding controlled opening and closing, and make the secondary winding produce high-voltage oscillation current.The igniter of the utility model uses electric arc to ignite, warm up fast, safer to use.

To provide a voltage supply circuit that can reduce the ripple in the output voltage of a charge pump circuit by suppressing the effect of changes in the power supply voltage on the voltage supplied to the charge pump circuit. [Solution] The voltage supply circuit according to the embodiment includes: a first LDO amplifier circuit that receives a power supply voltage from a power source and outputs a first control voltage from a first output unit according to a preset reference voltage; a second LDO amplifier circuit that receives a power supply voltage from a power source and outputs a second control voltage from a second output unit according to a reference voltage; an oscillation circuit; a first charge pump circuit that outputs a first output voltage generated from the first control voltage to a first output terminal; a second charge pump circuit that outputs a second output voltage generated from the second control voltage to a second output terminal; and a control circuit that controls the operation of the first LDO amplifier circuit and the second LDO amplifier circuit.

The invention relates to the technical field of semiconductors and power converters, and particularly discloses a multifunctional analysis system for electrical characteristics of a gallium nitride switching device, which is characterized in that a GUI interface implementation module comprises a double-pulse test circuit diagram displayed in a main interface, a software function selection button and a software closing button; the double-pulse test circuit diagram shows a test circuit schematic diagram of the gallium nitride switching device, the software function selection button is used for selecting different prediction analysis functions, and the software closing button is used for closing the system; and the Simulink model implementation module constructs a double-pulse test simulation circuit based on a Simscape model converted by using a Spice model, calculates simulation data, operates simulation and outputs the simulation data. According to the method, the voltage oscillation waveform and the crosstalk waveform of the gallium nitride switching device can be accurately predicted, a user can select device manufacturers and models and set parameters of a circuit used for simulation, and the voltage oscillation and crosstalk conditions of the gallium nitride switching device can be visually observed.

The utility model discloses a protection starting locking closing circuit for a power supply system, and relates to the field of power supply systems, and the protection starting locking closing circuit comprises an air switch, a first change-over switch, a second change-over switch, a high-voltage switch cabinet protection device, a circuit breaker, an intermediate relay, a closing coil, an opening coil, and a first connection pressing plate. A first terminal and a third terminal of the air switch are connected with the bus; a second terminal of the air switch is respectively connected with a first terminal of the high-voltage switch cabinet protection device, a first terminal of the first change-over switch, a third terminal of the first change-over switch and one end of a normally open contact of the intermediate relay; a fifth terminal of the high-voltage switch cabinet protection device is connected with one end of a first normally-closed contact of the circuit breaker; a fourth terminal of the air switch is respectively connected with the other end of the second normally closed contact of the intermediate relay, the other end of the opening coil and the other end of the coil of the intermediate relay; the whole circuit breaker is connected with a power supply system. According to the invention, voltage oscillation and impact on a power supply system are avoided.

This invention discloses a dual modulation method for power information in an isolated DC-DC converter based on high-frequency harmonic amplitude modulation, belonging to the technical field of power generation, substation, or distribution. This method is based on the design concept of complete separation of the high-frequency carrier and fundamental frequency bands. First, the waveform of the AC output voltage on the transmitting side is modulated, and the high-frequency harmonics carrying information are subjected to ASK (Automatic Signal-Sensing) to achieve wideband information transmission and improve channel capacity. Next, the signal is amplified through a resonant network of the magnetic cavity, which has the advantages of high signal-to-noise ratio, easy detection, and no impact on output voltage quality. Finally, the high-frequency AC voltage oscillation amplitude information on the receiving side is demodulated. This method requires only one switching cycle per communication, improving the communication rate compared to traditional methods; it also supports flexible high-frequency signal amplitude modulation, easily implements multi-level modulation, can transmit multiple bits per communication, and has almost no impact on DC voltage output quality or isolation transformer design, ensuring the integrity of power design.

The invention relates to the technical field of power devices, and discloses a method, a system, equipment, a medium and a product for evaluating the fatigue state of a bonding wire of a silicon carbide device. The method comprises the following steps: determining a voltage oscillation peak increment, a chip junction temperature difference and a turn-on delay time difference according to the voltage oscillation peak value, the chip junction temperature and the turn-on delay during the previous turn-on work, and carrying out per-unit processing on the voltage oscillation peak increment, the chip junction temperature difference and the turn-on delay time difference to obtain a voltage oscillation peak increment per-unit value, a chip junction temperature difference per-unit value and a turn-on delay time difference per-unit value; the bonding wire fatigue index of the target silicon carbide device is obtained by performing weighted calculation on the per unit value of the voltage oscillation peak increment, the per unit value of the chip junction temperature difference and the per unit value of the opening delay time difference, and the bonding wire fatigue state of the target silicon carbide device is determined by using the bonding wire fatigue index, so that the accurate evaluation of the health state of the device is realized.

This invention discloses a control method, device, electronic device, and medium for a multilevel converter, relating to the field of control. In this solution, when the flying capacitor voltage of the multilevel converter is in an uneven voltage state, a set of mutually paired upper arm switch control sequences and a set of lower arm switch control sequences are determined based on the number of switches in the multilevel converter. Corresponding upper arm PWM waves and lower arm PWM waves are generated to control the on / off states of the upper and lower arm switches. Since sequentially sending a pair of mutually paired upper arm PWM waves and a pair of lower arm PWM waves in adjacent cycles can balance the flying capacitor voltage, this solution periodically sends the first upper arm PWM wave, the second upper arm PWM wave, the first lower arm PWM wave, and the second lower arm PWM wave to balance the flying capacitor voltage as much as possible, thereby eliminating the voltage oscillation effect of the multilevel converter when the flying capacitor voltage is uneven.

A method including: charging a capacitor in parallel to the ESD; determining whether an energy storage device (ESD) is in use; monitoring temperature of the ESD, the ESD has a prescribed and operational temperature range; discharging the capacitor through an inductor by temporary actuation of a switch that couples the inductor in parallel to the capacitor, wherein oscillation of current and voltage is provided by a first circuit formed by the capacitor and the inductor, maintaining the ESD temperature within temperature range through oscillation of the ions due to high frequency oscillation of a second circuit formed by the capacitor and the internal inductance of the ESD, repeating the temporary reactuation of the switch while temperature is within the temperature range. Wherein the given temperature range is the prescribed temperature range when the ESD is not being used and is the operational temperature range when the ESD is being used.

The application discloses a control circuit applied to a photovoltaic shutdown device, the photovoltaic shutdown device and a photovoltaic system, and belongs to the photovoltaic technical field.In the control circuit of the embodiment of the application, a switch module is connected with a photovoltaic module.A switch control module is connected with the switch module, and is used for outputting a control voltage according to a comparison result of a first voltage and a second voltage, and controlling the on-off state of the switch module.A hysteresis filtering module is connected between the switch control module and the switch module at one end, and is connected between a first voltage dividing unit and the switch control module at the other end, and is used for staggering the threshold points of the switch module in the on state and the off state when the control voltage is equal to an input voltage.In this way, the switch module is prevented from being repeatedly turned on and turned off due to the influence of voltage oscillation at the on time and the off time, accurate control of the switch module is achieved, the service life of the switch module is prolonged, and the reliability and safety of the photovoltaic system are improved.

The present application relates to photovoltaic-photothermal combined power generation regional power grid voltage coordination control method and system, including: the photovoltaic-photothermal combined power generation regional power grid is divided into multiple sub-regions;According to the voltage information of the leading node in each sub-region, the voltage regulation instruction value of the leading node in each sub-region is determined;The reactive power control instruction value of the reactive power source of the photovoltaic power station and the voltage control instruction value of the photothermal power station in each sub-region are determined by using the voltage regulation instruction value of the leading node in each sub-region;The output reactive power of the reactive power source of the photovoltaic power station and the terminal output voltage of the photothermal power station in each sub-region are controlled by using the reactive power control instruction value of the reactive power source of the photovoltaic power station and the voltage control instruction value of the photothermal power station in each sub-region respectively.The technical scheme provided by the present application carries out unified coordination control on the dispersed multiple reactive power compensation devices and synchronous generator sets, realizes the nearby balance of reactive power and voltage regulation, and avoids the local power grid voltage oscillation caused by the respective control of multiple solar power stations.

The invention discloses a transient voltage control method, a transient voltage control device and transient voltage control equipment for a network construction type wind power plant based on adaptive droop, and a storage medium, and relates to the technical field of wind power generation. Determining a power control instruction for enabling the node voltage fluctuation of the grid-forming wind power plant to reach the minimum value; outputting a power control instruction to the net-forming type wind turbine; obtaining state parameters of the network-forming type wind turbine generator after responding to the power control instruction; and determining a deviation between the state parameter and the state reference value, and adjusting a network construction control parameter of the network construction type wind turbine generator according to a network construction control parameter droop coefficient of the network construction type wind turbine generator and the deviation, so that the output voltage of the network construction type wind turbine generator is in a preset voltage range and the output frequency of the network construction type wind turbine generator is in a preset frequency range, therefore, voltage oscillation and frequency oscillation are effectively suppressed when the grid-forming wind power plant is subjected to transient voltage disturbance, and the stability of the grid-forming wind power plant is improved.