4745results about "Dc-ac conversion without reversal" patented technology

The present invention relates to the technical field of circuit control, and relates to a direct-current high-voltage generator regulation and control method and system based on intelligent feedback. A fuzzy control logic operation is performed on an output current flux value and an input voltage fluctuation factor of a load experimental object, so as to obtain the disturbance amplitude of a voltage fluctuation state for a current flux change trend; if a step-up transformer can execute a PID control technology by adjusting a transformation ratio, PID real-time adjustment parameters are calculated, and a crossover mutation operation of individuals is performed on the basis of a fitness function, so as to generate a first boost regulation and control scheme; and if the step-up transformer cannot execute the PID control technology by adjusting the transformation ratio, a calibrated state feedback controller is constructed on the basis of a state variable of the current step-up transformer and an adjustment signal output amplitude, so as to generate a second boost regulation and control scheme. The present invention achieves intelligent feedback regulation and control by independently analyzing components of direct-current high-voltage generators, improving the stability and accuracy of outputting high-voltage direct current.

The invention relates to the technical field of inverter control, and provides an MBD-based reinforcement learning inverter control algorithm optimization method, which comprises the steps of S1, establishing a state space model of an inverter, designing a baseline controller of double-loop control, and constructing an MBD simulation platform containing multiple load models; s2, defining a state space of the 12-dimensional state vector, designing a continuous action space, and constructing an adaptive multi-target reward function; s3, training a control parameter optimization strategy by adopting an Actor-Critic algorithm architecture in combination with an experience playback mechanism and a hybrid exploration strategy; s4, establishing a security constraint mechanism of three-layer security protection, designing a fault detection and isolation strategy, realizing a closed-loop online learning strategy of pre-training-transfer learning-online fine tuning, and meanwhile, adopting a self-adaptive updating mechanism; and S5, verifying the optimization effect of the control algorithm through quantitative index evaluation, an experimental verification scheme and a real-time performance requirement test. And the upgrade of inverter control from model driving to data and model cooperative driving is realized.

The invention discloses a micro-grid power control method, system and device based on fuzzy modulation and a storage medium, and relates to the technical field of intelligent grid integration of a photovoltaic system and a micro-grid, and the method comprises the steps: firstly obtaining the real-time power data of a photovoltaic system, carrying out the control processing through fuzzy logic, and calculating a reference instruction; according to the reference instruction, hysteresis time is dynamically adjusted through modulation hysteresis control, and an inverter switching signal is generated; converting direct current into alternating current based on the switching signal and a power switching device, injecting the alternating current into the micro-grid, calculating active and reactive power reference values, ensuring that the system operates according to a unit power factor, and giving active power to the reference value; according to the method, the power control precision and adaptability of the micro-grid are improved, excessive switching of the inverter is avoided, loss is reduced, the service life is prolonged, power matching and stable transmission are achieved, reactive loss is reduced, bus voltage is stabilized, harmonic waves can be reduced, the electric energy quality is improved, and efficient and stable operation of the micro-grid is guaranteed.

The invention discloses a converter collaborative current limiting method based on adaptive virtual impedance and a power loop, and the method comprises the steps: firstly building an equivalent impedance model of a converter and a power grid, analyzing the steady-state and transient characteristics of fault current, and extracting key parameters for current limiting design; when it is detected that the voltage drop of the grid-connected point exceeds a threshold value, a self-adaptive virtual impedance link is automatically put into use, and virtual resistance and reactance values are dynamically calculated according to the variation amplitude of voltage or current, so that the virtual resistance and reactance values are proportionally adjusted along with the fault degree; and when the system voltage returns to normal, the virtual impedance automatically quits, and the control continuity is ensured. Then, the active and reactive power reference values are dynamically corrected according to the voltage drop depth, a power reference signal matched with the voltage amplitude is generated, it is guaranteed that power output does not exceed the limit, and the voltage supporting capacity is improved. Finally, real-time current-limiting control of the converter and stable operation of the system are realized on the premise of not switching the control mode through the synergistic effect of the virtual impedance ring and the power ring. The method has the advantages of being high in response speed, excellent in current limiting effect, good in control continuity and the like, and is suitable for fault current limiting and voltage support control of the grid-forming converter.

The invention discloses a grid-connected inverter control method based on second-order linear active disturbance rejection, and particularly relates to the field of grid-connected inverter control. Voltage and frequency error signals between the output side of the inverter and the power grid are obtained, a pre-synchronization control model is constructed, and voltage amplitude and frequency synchronization is achieved; a second-order linear active-disturbance-rejection controller is introduced in the frequency synchronization control process, an extended state observer is adopted to estimate the output frequency, the frequency change rate and a disturbance term, and a state error feedback control law is combined to generate a frequency regulation control quantity, so that accurate frequency control is realized; after grid connection, a dual-channel LADRC power regulation controller is constructed, and decoupling tracking control is carried out on active power and reactive power; meanwhile, on the basis of fast Fourier transform processing as a stable grid-connected state criterion, the method has the advantages of being high in control precision, high in anti-interference capability, good in current waveform quality, high in adaptability and the like, and is suitable for various grid-connected application scenes.

The invention belongs to the technical field of power electronics of power supply or power distribution, and provides a control method of a three-phase four-wire inverter, a controller and an inversion control system. A first control component is generated by using a phase angle, an inversion side three-phase current sampling value and a proportional integral compensator; a second control component and a third control component are generated by using a power grid voltage angular frequency, a neutral line current sampling value, a repetitive controller and a proportional resonance controller, the three control components are combined to control an inverter power switch tube, a proportional integral compensator is still adopted, the algorithm is simple, parameters are easy to design, and the reliability is high. And meanwhile, a repetitive-proportional resonance (RC-PR) composite controller is utilized to realize suppression of neutral line fundamental wave and harmonic current, and the method has faster dynamic response to load abrupt change, so that optimization of dynamic performance and steady-state performance is realized.

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 invention discloses a power equipment control method based on cloud edge collaboration and electronic equipment. The method comprises the following steps: receiving initial resonance waveform data corresponding to a plurality of inverters in power equipment sent by an edge server; based on the initial resonance waveform data corresponding to the plurality of inverters, determining the resonance frequency dynamic correlation strength between every two inverters in the plurality of inverters; generating a cooperative control parameter based on the resonant frequency dynamic correlation strength between every two inverters; and sending the cooperative control parameters to an edge server, so that the edge server determines real-time resonance fluctuation data corresponding to the plurality of inverters, calculates a resonance suppression compensation control signal based on the real-time resonance fluctuation data, and compensates the initial control signals corresponding to the plurality of inverters based on the resonance suppression compensation control signal. According to the invention, the technical problem that the compensation accuracy is low when resonance compensation is carried out on the inverter in the power equipment in the prior art is solved.

The invention relates to the technical field of power system control, in particular to a direct-current capacitor self-synchronizing grid-connected control strategy method, system, equipment and medium, a direct-current capacitor energy dynamic model is established based on an actual energy balance relation, a direct-current voltage signal is acquired in real time, and a synchronous compensation signal is calculated based on the acquired direct-current voltage signal; performing phase compensation and gain adjustment on the synchronous compensation signal through a correction link based on the calculated synchronous compensation signal, adjusting the internal frequency of the inverter based on the synchronous compensation signal after phase compensation and gain adjustment, controlling the DC voltage through the internal frequency of the inverter, and establishing a self-synchronization control model; and based on the self-synchronization control model, establishing an adaptive control algorithm, generating a damping coefficient and a virtual inertia coefficient through the adaptive control algorithm, and dynamically adjusting control parameters according to the damping coefficient and the virtual inertia coefficient.

The invention discloses a current source type LCCL double-frequency resonance system and a parameter matching method thereof, which are suitable for synchronous double-frequency induction quenching of complex workpieces such as gears. The system is composed of two current type resonant inverters working at a low frequency and a high frequency respectively and a dual-frequency LCCL resonant cavity, and dual-frequency current superposition is realized through parallel output. The double-frequency LCCL resonant cavity has two parallel resonance points, a mode based on simplified topology is adopted to simplify parameter design, and meanwhile design errors are maintained at a low level. A power matching coefficient is introduced, the ratio of high-frequency output power to low-frequency output power is adjusted by adjusting the value of the power matching coefficient, and the problem of double-frequency power unbalance caused by frequency variation characteristics of load equivalent resistance and the like is solved. The superposed double-frequency current forms a low-frequency envelope embedded high-frequency oscillation composite waveform on the induction heating coil, cooperative control of tooth root deep quenching (low frequency) and tooth surface hard quenching (high frequency) is achieved, and the method has the advantages of being simple in parameter design, high in power decoupling performance, high in operation stability and the like.

The embodiment of the invention relates to the technical field of energy storage, and provides an energy storage converter and an energy storage system thereof. The capacitor assembly and the inductor assembly are arranged on the two sides of the plate body assembly respectively; the two ends of the connecting assembly are electrically connected with the capacitor assembly and the inductor assembly respectively; and the heat dissipation assembly is provided with a heat dissipation air channel, and at least part of the capacitor assembly is located in the heat dissipation air channel, so that the problem of low working efficiency of an inductor and a capacitor in the energy storage converter in the prior art is at least favorably solved.

A power converting apparatus includes a photovoltaic inverter configured to convert direct current power from a photovoltaic module into alternating current power, and a controller configured to control the photovoltaic inverter, wherein the photovoltaic inverter includes a first switcher configured to perform switching on the direct current power, a transformer having an input side connected to an output end of the first switcher, and a second switcher connected to an output side of the transformer, and the controller is configured to control at least one of a voltage and current of the first switcher and a voltage and current of the second switcher.

A system includes: an inverter, wherein the inverter includes: a power module including: a flex layer including a gate trace, a first substrate, a second substrate including a source plane and a gate plane separated from the source plane by a full trench, the source plane including a step trench, and the gate plane including an electrical connection through the gate trace of the flex layer to a gate input connection of the power module, a semiconductor die disposed between the first substrate and the second substrate, the step trench formed in a portion of the source plane corresponding to at an edge of the semiconductor die, and the semiconductor die including a gate connected to the gate plane, and a sinter element disposed between the semiconductor die and the second substrate to connect the semiconductor die to the second substrate; a battery; and a motor.

The present application belongs to the grid-connected converter technical field, disclose a kind of droop control inverter current-limiting control method and system, the virtual impedance size and active reference value restriction condition when the fault current is equal to current-limiting value are accurately obtained by phasor analysis, virtual impedance-current difference proportional coefficient and active reference value-current difference proportional coefficient are designed considering the most serious situation of current-limiting, proportional increase virtual impedance and reduce active reference value with the change of adaptive current at fault, can meet the current-limiting requirement under different depth grid voltage drop.The current-limiting control method proposed in the present application is adaptive to fault current, without fault detection device, the transient stability of inverter is enhanced due to the reduction of active reference value at fault, and the fault current is indirectly limited by adjusting virtual impedance and active reference value, the voltage source characteristics of droop control inverter are retained, and the system fault ride-through capability is significantly enhanced.

The invention, which relates to the technical field of distributed power generation, discloses a modularized distributed photovoltaic inverter cluster intelligent regulation and control system comprising an impedance identification module, an impedance control module, a state sensing module, a fault diagnosis and isolation module, a power distribution module and a cluster fault control module. The power grid impedance monitoring module is used for monitoring voltage and current signals of a grid-connected point of the photovoltaic inverter, calculating a power grid equivalent impedance value, an impedance change trend and a harmonic component proportion of the current photovoltaic inverter, and generating power grid impedance information. The impedance identification module and the impedance control module are arranged, adjustment is carried out based on the virtual impedance parameters, the resonance problem caused by power grid impedance fluctuation is effectively suppressed, the situation that grid-connected current distortion affects the electric energy quality is avoided, the photovoltaic inverter cluster stably operates in a power grid impedance change scene, and the power grid impedance change efficiency is improved. And the cluster grid-connected power quality and the adaptability to the power grid environment are improved.

A power converter, includes: a first terminal, a second terminal, a third terminal and a fourth terminal; stored-energy-source terminals, to which a stored energy source can be connected; four inverter bridge branches, which are formed from semiconductor switching devices, the inverter bridge branches each having a center tap, each center tap being assigned to one of the terminals, and the inverter bridge branches being interconnected and controllable such that electrical energy can be transferred bidirectionally between the stored-energy-source terminals and the first terminal, the second terminal, the third terminal and / or the fourth terminal; and a control unit, which is designed to control the semiconductor switching devices of the inverter bridge branches.

An electric power conversion apparatus includes an inverter configured to convert input DC power into AC power, and a control device configured to control the inverter, wherein the control device is configured to prioritize limiting one of an active current and a reactive current output from the inverter over the other of the active current and the reactive current, so that an apparent current output from the inverter becomes less than or equal to a limit value.

The invention relates to an electrical traction network (1) for a motor vehicle, comprising a separately excited synchronous machine (2), a pulse-controlled inverter (3), a high-voltage battery (4), a DC / DC converter (6) and a charger (5), wherein the charger (5) has a mains connection (9) for an external AC voltage network, wherein the charger (5) is connected to AC voltage outputs of the pulse-controlled inverter (3) via first switching elements (S1), wherein the AC voltage outputs of the pulse-controlled inverter (3) are connected to the phases of the synchronous machine (2) via second switching elements (S2), wherein the DC voltage connections (HV+_PWR, HV-_PWR) of the pulse-controlled inverter (3) and an output of the DC / DC converter (6) are connected to the high-voltage battery (4) via third switching elements (S3), wherein the inputs of the DC / DC converter (6) are connected to the DC voltage connections (HV+_PWR, HV-_PWR) of the pulse inverter (3),wherein fourth switching elements (S4) are arranged between the output of the DC / DC converter (6) and two half-bridges of the DC / DC converter (6), wherein the DC / DC converter (6) is connected to a rotor winding of the synchronous machine (2) via fifth switching elements (S5), and a method for operating such an electrical traction network.

The invention provides a zero-voltage ride-through control method for a self-synchronizing voltage source doubly-fed wind turbine generator, which comprises the following steps that: when the self-synchronizing voltage source doubly-fed wind turbine generator is in a transient state, a grid-side converter adopts vector control, and a rotor-side converter adopts additional virtual impedance and annular current limiting; the transient overcurrent of the grid-side converter and the rotor-side converter can be effectively suppressed, so that the continuous operation capability of the wind turbine generator in the zero-voltage ride-through period can be maintained; meanwhile, by improving the transient capacity and the transient reactive current amplitude of the converter, the transient voltage supporting capacity of the wind turbine generator during the zero voltage ride-through period can be effectively provided; when the self-synchronizing voltage source doubly-fed wind turbine generator set is in a transient state, overvoltage of direct-current bus voltage is limited by a Chopper circuit, active-priority current amplitude limiting control is adopted by a grid-side converter, parameters of a current inner ring PI controller of a rotor-side converter are optimized, energy balance of a direct-current side can be achieved in the zero-voltage ride-through period, and stability of the direct-current bus voltage is maintained.

A system includes: an inverter configured to convert DC power to AC power, wherein the inverter includes: a power module including: a first substrate, a second substrate including a source plane and a gate plane separated from the source plane by a full trench, the source plane including a step trench, and the gate plane including an electrical connection through the second substrate to a gate input connection of the power module, a semiconductor die disposed between the first substrate and the second substrate, the step trench formed in a portion of the source plane corresponding to an edge of the semiconductor die, and the semiconductor die including a gate connected to the gate plane, and a sinter element disposed between the semiconductor die and the second substrate to connect the semiconductor die to the second substrate; a battery; and a motor.

The invention relates to an alternating-current and direct-current integrated power supply system and a control method, a power conversion unit comprises a parallel high-frequency rectification module, an inversion module and a communication power supply module, and a direct-current side is connected in parallel to a common direct-current bus; the energy storage unit realizes energy interaction between a storage battery pack and a bus through a bidirectional DC / DC converter, and a matched health monitoring circuit acquires internal resistance, temperature and voltage data in real time; the dynamic voltage support unit is formed by connecting a filter network and a transient suppression device in series and is directly connected with a bus to suppress voltage fluctuation caused by load abrupt change; the electromagnetic protection unit integrates an input-stage surge protector, a cabinet body grounding copper bar and an anti-interference device, so that the electromagnetic compatibility of the system is guaranteed; the intelligent control unit is combined with the communication bus through the main controller, and the functions of multi-mode power supply switching, energy storage unit temperature compensation charging and cooperative fault protection are achieved. The system meets the AC / DC load hybrid power supply requirement through the modular design and the cooperative control strategy, and improves the reliability and adaptability of the power supply system.

The invention discloses a rectification feedback control method and system. The method comprises the following steps: acquiring a power grid voltage and an inversion output current, and obtaining an active current through phase locking and coordinate transformation; whether feedback is started or not is determined by judging whether id is lower than a first threshold value or not, if yes, a driving signal is generated according to the phase of the power grid, a power switch device in the rectification feedback unit is conducted, and energy is fed back to the power grid; if id is higher than the second threshold value, the unit is turned off. According to the method, by detecting the energy flow direction in real time, self-adaptive on-demand switching of the rectification feedback unit is achieved, unnecessary switching actions of a power device are effectively reduced, switching loss and the aging speed of the device are reduced, and therefore system efficiency and reliability are improved, the service life of the device is prolonged, and energy waste is avoided.

The invention relates to the technical field of micro-grids, in particular to a direct-current component suppression method of a grid-connected inverter, the inverter and a storage medium. The direct-current component suppression method comprises the following steps: determining an expression of a direct-current component in grid-connected current according to a grid-connected inverter circuit model and a Kirchhoff's law; based on the expression of the direct-current component in the grid-connected current, virtual impedance capable of inhibiting the direct-current component in the grid-connected current is constructed; the virtual impedance is introduced into a control loop of the grid-connected inverter, and a calculation model of a modulation wave compensation item is obtained through equivalent transformation; and superposing the original modulation wave signal output by the current loop controller and the modulation wave compensation signal obtained based on the calculation model of the modulation wave compensation item to obtain a final modulation wave signal. According to the method, enhanced suppression is carried out on the direct current component by introducing the virtual impedance, the problem is solved from the source, the suppression effect is remarkable, and the alternating current fundamental wave performance is not affected.

The utility model discloses an integrated power module, a compressor controller, a compressor and a vehicle, the integrated power module is applied to the compressor controller, the compressor controller comprises a control unit, and the integrated power module comprises a plate body; the inverter circuit and the switching circuit are arranged on the plate body, the inverter circuit is configured to control a compressor motor based on a received first driving control signal, and the switching circuit is configured to control a PTC heater based on a received second driving control signal, the first drive control signal and the second drive control signal are generated based on a control instruction output by the control unit. According to the integrated power module, the inverter circuit and the switching circuit are integrated in the integrated power module of the compressor controller, so that the compressor controller can control the PTC heater, a PTC controller in the PTC heater can be omitted, and the size and the cost of a vehicle air conditioning system are reduced.

The embodiment of the application provides a kind of power conversion equipment, it is related to power electronics field.The power conversion equipment includes shell, circuit board, radiator and first heat exchanger, power cavity is formed in shell, heat dissipation cavity is formed outside shell, shell includes the partition between power cavity and heat dissipation cavity, opening is arranged on the partition, circuit board is arranged in power cavity and the side of opening has first power device;Radiator is arranged in heat dissipation cavity and includes first substrate and first heat dissipation part, first substrate is arranged at opening and is in contact with first power device, first substrate is provided with first gas-liquid passage, first heat dissipation part is provided with second gas-liquid passage communicated with first gas-liquid passage, and cooling working medium for gas-liquid conversion is arranged in first gas-liquid passage;First heat exchanger is located in power cavity or heat dissipation cavity.Through the above technical scheme, the device that can be targeted to heat seriously in power conversion equipment is cooled, so that power conversion equipment is stably operated.

The invention discloses a multi-frequency induction heating power supply and a control method thereof, and the power supply comprises an inverter circuit module which is used for outputting a multi-frequency driving voltage, a bidirectional switch module which is used for controlling a heating mode, and a multi-frequency resonance module which is used for multi-frequency induction heating and power decoupling. The control method corresponds to the multi-frequency induction heating power supply. According to the invention, the inversion module outputs a multi-frequency driving voltage, the bidirectional switch module controls a heating mode, and the multi-frequency resonance module realizes multi-frequency heating and power decoupling; the whole structure is simple, the module collaboration is high, a hardware basis is provided for multi-frequency heating, the requirements of different workpieces can be met, meanwhile, multi-frequency crosstalk is avoided in an assisting mode, and the heating reliability and adaptability are improved.

The invention discloses a network construction converter fault ride-through method, system and device considering a current limiting requirement, and the method comprises the steps: obtaining the active power and reactive power outputted by a network construction converter according to the three-phase capacitor voltage of the network construction converter and the three-phase current of an inverter side; obtaining a synchronization angle of the network construction converter according to the active power, and obtaining an internal potential amplitude of the network construction converter according to the reactive power; and obtaining dq-axis components of the three-phase capacitor voltage in a synchronous rotating coordinate system according to the synchronous angle, obtaining a dq-axis instruction of the current of the grid-forming converter by combining the internal potential amplitude, performing PI control to obtain an initial modulation voltage, subtracting the initial modulation voltage from the voltage drop of the transient virtual resistor to obtain a modulation voltage meeting the current limiting requirement, and performing SVPWM control to obtain the current limiting current of the grid-forming converter. And obtaining a switch control signal of the network construction converter. According to the method, the steady-state operation of the grid-forming converter is not influenced while fault ride-through is completed under the condition that the inverter is not over-current in the transient state, and the reliability and the effectiveness are ensured under a relatively deep voltage drop fault.

The invention discloses a method, device and equipment for determining parameters of a proportional resonance controller and a medium, the proportional resonance controller is applied to a current controller of a three-phase grid-connected inverter, the parameters of the proportional resonance controller comprise a proportionality coefficient, a first damping coefficient and a second damping coefficient, the first damping coefficient is greater than the second damping coefficient, and the second damping coefficient is greater than the first damping coefficient. The three-phase grid-connected inverter further comprises a filter. The proportional resonance controller is low in parameter coupling, can be independently designed, and is simple in engineering implementation; in the target open-loop transfer function, the proportionality coefficient determines the basic proportional gain, the damping coefficient controls the attenuation speed of the corresponding resonance factor, the difference between the first damping coefficient and the second damping coefficient can influence the gain bandwidth, and the larger the difference between the first damping coefficient and the second damping coefficient is, the more significant the attenuation speed difference between the second resonance factor and the first resonance factor is. The wider the high gain interval at the specific frequency of the power grid is, the higher gain is still kept even if the frequency of the power grid fluctuates, and the adaptability and robustness to the frequency deviation of the power grid are improved.

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

The invention relates to a single-loop control method for a static synchronous phase modifier, which belongs to the technical field of power systems, and comprises the following steps of: comparing a maximum voltage difference value in three phases with a preset voltage threshold value to obtain a voltage difference value after amplitude limiting, and obtaining a first virtual reactance by using the voltage difference value after amplitude limiting and a preset current amplitude limiting threshold value; performing proportional integral control on the difference between the maximum current value in the three phases and the current amplitude limiting threshold to obtain a second virtual reactance; virtual impedance is calculated according to the first virtual reactance and the second virtual reactance; the product of the virtual impedance and the current of each phase is used as the current amplitude limiting voltage of the corresponding phase; the modulation wave of the corresponding phase is generated by using the internal potential and the current amplitude limiting voltage of each phase, so that the voltage single-loop control and the fault current amplitude limiting of the static synchronous phase modifier are realized, the broadband oscillation risk and the overcurrent risk of the converter are effectively reduced, and the safety and the reliability of static synchronous phase modifier equipment are improved.