34results about How to "Harmonic suppression" patented technology

The invention discloses a modeling method of a fractional order LC type three-phase inverter, and relates to the technical field of modeling and control of power electronic converters. On the basis of a traditional integer order LC type three-phase inverter, an integer order LC type filter in the inverter is replaced by a fractional order LC type filter, so that a new fractional order inverter topology is constructed. On the basis of the topology, mathematical models under a three-phase static abc coordinate system and a two-phase rotating dq coordinate system are constructed. Based on the mathematical model, a voltage and current double-closed-loop decoupling control strategy of the fractional order LC type three-phase inverter is deduced. In addition, a traditional virtual synchronous generator control link is replaced by an FOVSG control link, and the stability of the FOVSG control link is analyzed through a small signal model. According to the invention, dynamic decoupling can be effectively realized according to the order of the fractional order LC filter. In addition, an adjustable order is introduced in the FOVSG control link, and the performance of the inverter is improved under different control requirements.

The invention discloses a harmonic suppression predictive control method and module for a three-phase grid-connected inverter system, and belongs to the field of power electronic control. The method comprises the following steps: firstly, establishing a continuous domain state space model of a three-phase grid-connected inverter system under a dq coordinate system, discretizing the state space model at a k moment, and obtaining a prediction model of a k + 1 sampling power grid current; enabling the power grid current prediction model to reach a power grid current reference value at a k + 1 sampling moment, and calculating a reference inverter voltage control reference value; calculating a voltage control reference value of the inverter integrated with harmonic suppression by combining the voltage control reference value of the reference inverter and the discretized quasi-resonance controller; determining an optimal voltage vector and action time of an inverter voltage control reference value capable of synthesizing the integrated harmonic suppression; and generating a control pulse signal and applying the control pulse signal to a switching tube of the three-phase grid-connected inverter to realize harmonic suppression prediction control of the three-phase grid-connected inverter system. The steps are simple, and the harmonic prediction and suppression control effect is good.

The invention discloses a low-noise harmonic suppression radio frequency system for filter band control. The low-noise harmonic suppression radio frequency system comprises a Chebyshev low-pass frequency hopping filter, a power element parameter control module, a harmonic suppression module and a low-noise amplifier, wherein the Chebyshev low-pass frequency hopping filter comprises a plurality of power elements; an external radio frequency signal is used as the input of the Chebyshev low-pass frequency hopping filter, and the output end of the external radio frequency signal is connected with the input end of the harmonic suppression module; the power element parameter control module is connected with a power element of the Chebyshev low-pass frequency hopping filter through a multiplexer switch; the input end of the harmonic suppression module is connected with the output end of the Chebyshev low-pass frequency hopping filter; the low noise amplifier is connected with the output end of the harmonic suppression module; the input end of the low-noise amplifier is connected with the output end of the harmonic suppression module. Through cooperative work of the modules, radio frequency signals can be efficiently processed, and the targets of frequency band control, harmonic suppression and noise suppression are achieved.

The invention provides a low-harmonic strong-stability control method and system for a photovoltaic inverter under a weak power grid working condition, and the method comprises the steps: obtaining a grid-connected current of a grid-connected inverter system grid-connected point, obtaining a grid-connected current reference value, and enabling a controller to generate grid-connected current control information according to the grid-connected current and the grid-connected current reference value; and the grid-connected current is multiplied by the impedance remodeling link and then fed back to the output end of the controller, so that the output impedance of the inverter is connected with a virtual impedance in series, and the virtual impedance is utilized to generate a virtual resistance characteristic at the resonant frequency so as to suppress low-frequency harmonic waves in the grid-connected current. According to the invention, the virtual impedance is connected in series with the output impedance of the inverter, so that impedance remodeling is realized, the influence of background harmonics and low-frequency harmonics caused by small capacitance on the grid-connected current can be reduced, and the low-frequency harmonics in the grid-connected current can be effectively suppressed.

The invention relates to a model prediction fault-tolerant control method and system for a dual three-phase permanent magnet synchronous motor, and the method comprises the steps: estimating the lumped disturbance in the operation process of the motor in real time based on an extended state observer, and carrying out the feed-forward compensation of the reference voltage of the motor according to the lumped disturbance information; and based on the compensated voltage reference value, constructing a dynamic voltage vector set and correcting an initial voltage vector set, searching an optimal voltage vector in the dynamic voltage vector set, and driving the motor through three-phase decoupling space vector pulse width modulation. According to the field loss fault-tolerant control strategy designed by the invention, phase current harmonics caused by local field loss faults of the dual three-phase permanent magnet synchronous motor can be effectively suppressed, and the steady-state precision and the dynamic response capability of the system under the local field loss faults are enhanced.

The invention discloses a rare-earth-free permanent magnet synchronous motor structure and a design method, the rare-earth-free permanent magnet synchronous motor structure comprises a motor body and a rotor body arranged in the motor body, the rotor body is provided with a plurality of V-shaped magnetic steel grooves and a plurality of I-shaped magnetic steel grooves, and detachable magnetic steel is installed in the V-shaped magnetic steel grooves and the I-shaped magnetic steel grooves; the magnetic steel, the motor body and the rotor body are made of materials without rare earth metal, fluctuation of magnetic groove torque and load torque of the motor is reduced by designing the V-shaped grooves and adjusting inclination and length of the V-shaped grooves, power density is effectively improved, harmonic waves and NVH (noise vibration and harshness) of the motor are inhibited synchronously through the design methods, and the service life of the motor is prolonged. The motor has good efficiency, torque fluctuation and NVH performance under the full-rotation-speed working conditions of different permanent magnet structures, the rare-earth-free motor does not contain rare earth metal, and the manufacturing cost is greatly reduced.

The invention belongs to the technical field of grid-connected power control, and aims to provide an MMC grid-connected power control method. The passive current inner loop controller with linear damping is introduced into the current inner loop, so that energy dissipation is accelerated, the dynamic response performance and the adjusting speed of the system are improved, current harmonics can be effectively suppressed, and the stability of the system is enhanced; meanwhile, a self-adaptive power outer ring controller containing a self-adaptive rotational inertia compensation mechanism of an arctan function and a self-adaptive damping compensation mechanism is introduced into a power outer ring, so that the rotational inertia change rate in self-adaptive control is effectively suppressed, transient oscillation of the system is further suppressed, and the reliability of the system is improved. And the dynamic response performance and the transient stability of the MMC grid-connected system are further improved.

The invention relates to the technical field of permanent magnet synchronous motor control, in particular to a dual three-phase permanent magnet synchronous motor A-phase and U-phase open-circuit fault-tolerant control method, which comprises the following steps: S1, acquiring voltage and current data of a dual three-phase permanent magnet synchronous motor under an A-phase and U-phase open-circuit fault; s2, acquiring components of current harmonics under the A-phase and U-phase open-circuit faults, and acquiring harmonic characteristic information through the components of the current harmonics; s3, based on the harmonic characteristic information, current harmonics are suppressed through a multiple proportional-integral quasi-resonance controller; and S4, converting the voltage data into a static coordinate system, calculating to obtain voltage vectors after A and U phase open circuits in the static coordinate system, dividing the distribution of the voltage vectors in the static coordinate system into eight sectors, and calculating the duty ratio of each sector, the application designs a post-fault SVPWM algorithm, the SVPWM algorithm is expanded to a fault state, and the A and U phase open circuit faults can be processed.

The utility model provides a photovoltaic SVG dynamic compensation cabinet, which comprises a compensation cabinet main body and a capacitor, an operation control box is arranged in the compensation cabinet main body, a high-voltage load switch is arranged above the operation control box, a vacuum contactor is arranged below the operation control box, and the capacitor is arranged above the high-voltage load switch. An SVG module is installed below the vacuum contactor and located below the left side of the compensation cabinet body, a first inversion power unit and a second inversion power unit are arranged on the right side of the operation control box side by side, a centrifugal fan is installed at one end of the top of the compensation cabinet body, and one end of the centrifugal fan is connected with an air pipe. The capacitor is located in the middle of the interior of the compensation cabinet body. According to the utility model, the SVG dynamic reactive power compensator is adopted, the power factor of a power grid can be monitored in real time, accurate reactive power compensation can be provided according to requirements, and the SVG dynamic reactive power compensator can help a photovoltaic power generation system to maintain a high power factor and improve the power generation efficiency by adjusting the phase difference between current and voltage.

The application provides a novel dead-time adaptive control method and device for a bridge arm topology. When complementary driving, the first dead-time is shortened as much as possible to reduce the dead-time freewheeling loss and effectively reduce a large number of harmonics caused by the dead-time insertion under the premise of avoiding bridge arm shoot-through, thereby improving the operation stability of an electrical system. Meanwhile, the second dead-time is dynamically adjusted according to the load current change to ensure that the second dead-time value can eliminate the output capacitor loss and reduce the dead-time freewheeling loss in the full power range, thereby improving the efficiency. Moreover, the second dead-time is too large to affect the output waveform quality of the circuit, and therefore, the second dead-time harmonic restriction is added to relieve the contradiction between the efficiency and the reliability.

The application relates to the technical field of electric drive transmission equipment, and discloses a multi-stage planetary rotor group large-torque direct drive system and a control and assembly method thereof. The sealed high-strength load-bearing shell is integrally cast and has a completely closed high-pressure sealed cavity formed by being enclosed inside. The single-field excitation stator assembly is fixed to the inner wall of the load-bearing shell through a hot-pressing process, the stator core is uniformly provided with embedded grooves in the circumferential direction, three-phase distributed excitation windings are wound in the grooves, and the winding ends are subjected to insulation curing treatment. The axial multi-stage planetary rotor assembly is coaxially arranged along the central axis of the whole machine. The single-stator axial multi-stage planetary rotor coaxial series connection, magnetic field coupling and mechanical planetary composite transmission structure are adopted, the rotors at all stages share the same central output main shaft to realize step-by-step superposition of the torque, and the inter-stage non-magnetic-conducting magnetic shielding ring completely blocks the magnetic field cross talk. Compared with the combination of a traditional permanent magnet motor and an external speed reducer, the torque density, transmission efficiency and structural integration degree are significantly improved.

The utility model discloses a kind of flat wire short-pitch winding and motor, flat wire short-pitch winding includes the U-phase parallel branch circuit wound on motor stator, V-phase parallel branch circuit and W-phase parallel branch circuit;U-phase parallel branch circuit to the outgoing line end of U-phase parallel branch circuit is set in outermost flat wire layer, neutral point is set in innermost flat wire layer;U-phase parallel branch circuit to the outgoing line end of U-phase parallel branch circuit is set in innermost flat wire layer, neutral point is set in outermost flat wire layer;3Q stator slots are spaced between the neutral point of U-phase parallel branch circuit to the outgoing line end of U-phase parallel branch circuit;The number of the U-phase parallel branch circuit, V-phase parallel branch circuit and W-phase parallel branch circuit is equal and equidistantly arranged;The utility model ensures that each parallel branch circuit is evenly distributed, avoids circulation problem;By using short-pitch winding, the harmonic of motor operation is reduced.

This application provides a method and apparatus for suppressing current harmonics in an electrolytic capacitor-free drive system, relating to the field of permanent magnet synchronous motor drive control, and used to improve grid-side current quality. The method includes: acquiring a sawtooth wave of the same frequency, which is generated based on the LC resonant frequency; comparing the sawtooth wave with a given value to obtain a rectangular wave, and amplifying the rectangular wave to obtain a given damping pulse; shifting the phase of the given damping pulse according to the three-phase grid-side current to obtain an applied damping pulse; obtaining an α-axis voltage compensation component and a β-axis voltage compensation component based on the applied damping pulse; superimposing the α-axis voltage compensation component onto the α-axis voltage to obtain an α-axis voltage command; superimposing the β-axis voltage compensation component onto the β-axis voltage to obtain a β-axis voltage command; and applying the α-axis voltage command and the β-axis voltage command to a space vector pulse width modulation (SVPWM) inverter.

The utility model discloses a low-ripple and low-harmonic power supply charger. The internal circuit comprises a commercial power input and over-current protection circuit, an EMI filtering electromagnetic anti-interference circuit, a harmonic improvement circuit, a rectification filter circuit, a PWM control IC and MOSFET tube driving circuit, a high-frequency transformer conversion circuit, an output rectification filter circuit, an MCU protection and charging control circuit, a loop control circuit, a load short circuit prevention and reverse insertion circuit and an output low ripple and EMI circuit. According to the lead-acid battery power supply charger of the utility model, the EMI filtering electromagnetic anti-interference circuit, the harmonic improvement circuit, the output rectification filter circuit and the output low ripple and EMI circuit are designed, and the high-frequency transformer is adopted, so that the power supply charger is provided with a multi-stage ripple and harmonic suppression circuit, and therefore, ripple and harmonic generated in the charger can be improved and suppressed; working stability and power supply efficiency of the power supply charger are ensured.

The application provides a method for suppressing sideband harmonics of a multi-rate staggered sampling NLM modulation VSC system. In the method, a plurality of sub-modules of each bridge arm are evenly divided into M independent sub-module groups; a specific time is sequentially offset relative to a global time reference to trigger the sampling of the modulation wave and the calculation of the number of sub-modules of each sub-module group; the number of sub-modules required by each group is independently calculated, and the corresponding sub-module is selected from the group according to the global capacitor voltage sorting result to perform the switching action. Through the staggered action of each group, the equivalent update frequency of the bridge arm total voltage is increased, the sideband harmonic frequency caused by the sampling-holding effect is shifted, and the amplitude is reduced. Without increasing the sub-module switching frequency, without changing the original control period and communication load, the low-order sideband harmonics in the bridge arm voltage are effectively suppressed, the AC side power quality is improved, and the filter design pressure is reduced.

The utility model relates to the field of microwave communication, and specifically relates to a circuit for improving broadband ping-pong local oscillator output amplitude consistency. Comprising a first attenuator, a programmable frequency divider, a first filter, a first amplifier, a second attenuator, a second filter, a second amplifier and a third filter which are sequentially connected end to end, the input end of the first attenuator is connected with the output end of the ping-pong local oscillator; and the programmable frequency divider is configured to be in a 1 frequency division mode and is used for carrying out amplitude stabilization processing on the signal output by the first attenuator. According to the invention, the consistency and stability of the output amplitude are significantly improved. The circuit design is simplified, the debugging difficulty is reduced, and the overall performance of the system is improved, so that the system is more suitable for the requirements of a modern microwave communication system.

The invention discloses a miniaturized Beidou III dual-frequency down-conversion board, comprising a dual-frequency down-conversion module, wherein the dual-frequency down-conversion module is arranged between a low-noise amplifier and a whole mainboard of a receiver, and comprises a feeding circuit, an amplifying circuit, a power dividing circuit, a B3 filtering circuit, a B1c filtering circuit, a frequency conversion processing circuit, and a power conversion circuit. The invention completes the superheterodyne receiving function of Beidou III satellite navigation signals, and provides corresponding intermediate frequency digital signal output, thereby providing intermediate frequency information for Beidou III satellite positioning and navigation solution.

The invention discloses a time delay estimation system for suppressing intermodulation and harmonic waves of a short wave transmitter, which comprises a preprocessing module, a digital pre-distortion algorithm module, an up-conversion module, a digital-to-analog converter, a power amplifier, an analog-to-digital converter and a down-conversion module, and also discloses a time delay estimation method for suppressing intermodulation and harmonic waves of the short wave transmitter. Comprising the following steps of 1, performing amplitude alignment on a baseband signal and an output signal of a down-conversion module, 2, performing preliminary time delay alignment calculation by utilizing the baseband signal and the output signal, a real part or an imaginary part of the down-conversion module, and 3, performing time delay alignment calculation on the basis of the preliminary time delay alignment of the baseband signal and the output signal of the down-conversion module. And carrying out time delay alignment on the module value of the signal again. According to the method provided by the invention, the modeling of the digital pre-distortion model on intermodulation and harmonic waves is more accurate, so that the suppression of intermodulation and harmonic waves is realized, and the linearity of a short wave transmitter system is improved.

The invention relates to the technical field of motors and magnetic fluids, in particular to an axial flux permanent magnet motor rotor passive radial restraining and limiting method based on a stator back side magnetic fluid, a magnetic fluid forming limiting assembly is arranged on the back side of a stator, the magnetic fluid forming limiting assembly corresponds to the back face of a stator magnetic flux area, and an annular back side cavity area is formed; magnetic fluid is introduced into the back side cavity area, and the magnetic fluid is preliminarily distributed and attached to the back face area corresponding to the teeth / poles of the stator under the static or low-speed condition; when the motor runs, a rotating magnetic field generated by the rotor is utilized to magnetize the magnetic fluid and orientate the magnetic fluid along magnetic lines of force, so that the magnetic fluid is attached and keeps continuity under the action of the magnetofluid forming and limiting assembly; when the rotor generates radial eccentricity or pitching swing, a radial restoring force and a limiting effect on a boundary are generated by virtue of a coupling effect of a rotating magnetic field and fluid viscosity, so that passive radial constraint and limiting on the rotor are realized.

The invention discloses a method for suppressing harmonics of a brushless doubly-fed motor, which belongs to the technical field of brushless doubly-fed motors and comprises the following steps: S1: three sets of windings with pole pairs of P1, P2 and P3 are used to form a motor stator winding, and a composite span arrangement is used between each set of windings; S2: the positive directions of magnetic flux, current and voltage are selected; S3: the rotor winding is transformed to the stator side through a turns ratio, the number of turns of the stator and the rotor windings are equal, and the mutual inductance magnetic flux between each winding passes through an air gap; S4: the air gap magnetic field characteristics are analyzed to obtain an air gap magnetic field waveform; S5: a four-quadrant frequency converter is used to adjust the speed of the three sets of stator windings to obtain the harmonic magnetomotive force fluctuation amplitude; three sets of windings with adjustable spans are used to form the stator winding, and the spans between the power winding, the control winding and the pitch-adjusting winding and the spans between the coils of each winding are gradually shortened within a certain range so that the harmonic magnetic fields overlap with each other, the short-distance effect is increased, and the harmonic magnetomotive force intensity is reduced.

This invention relates to a speed control method and electronic device for permanent magnet synchronous motors (PMSMs) based on singular perturbation theory. The method includes: establishing a singular perturbation model of the PMSM and decoupling it into a fast-changing subsystem and a slow-changing subsystem; constructing an amplitude control set model predictive controller to obtain a voltage amplitude candidate set and establishing a current prediction model; calculating a q-axis current reference value based on a deadbeat controller; constructing a cost function based on the q-axis current reference value; using the cost function and the current prediction model to traverse the voltage amplitude candidate set; selecting the voltage combination with the minimum cost function as the optimal voltage control signal; and driving the PMSM based on the optimal voltage control signal. Compared with existing technologies, this invention has advantages such as improved current tracking accuracy, suppression of harmonics and torque ripple, ensuring rapid tracking of speed commands, and simultaneously meeting the requirements of high dynamics, high precision, and robust control of motor speed.

The utility model discloses a kind of intermediate frequency DC reactors, including magnetic core, coil, input conductive row and output conductive row, the magnetic core is oppositely equipped with two iron columns, the coil is equipped with two groups and is respectively wound on the two iron columns of the magnetic core, the coil is wound with thin wide metal foil and is formed, the input conductive row is located in the lower portion of this intermediate frequency DC reactor and is connected with the coil, the output conductive row is located in the upper portion of this intermediate frequency DC reactor and is connected with the coil. The utility model winding loss is small, and the heat dissipation performance is excellent, compact structure, high reliability, strong environmental adaptability, can be adapted to intermediate frequency working condition.

The utility model relates to the technical field of electromagnetic wave conduction, especially a kind of power combining device of harmonic can be inhibited, including the branch line being connected with main road, still including harmonic suppression line, the one end of harmonic suppression line is connected with main road and / or branch line, the other end is grounded, the length of harmonic suppression line is n / 2 of harmonic wavelength, the n is not the natural number of 0;Or / and, the one end of harmonic suppression line is connected with main road and / or branch line, the other end is open circuit, the length of harmonic suppression line is n / 4 of harmonic wavelength, the n is odd, provide a kind of power combining device of harmonic can be effectively inhibited.

The invention relates to the technical field of island detection, and discloses an island detection method and system based on the combination of a particle swarm algorithm and an improved AFDPF algorithm, and the method comprises the steps: adding a frequency disturbance initial value at an inverter control side, and detecting the PCC point frequency; judging whether the PCC point frequency exceeds a power grid standard operation specified range or not, if not, returning to the previous step to add disturbance again, and if yes, performing the next step; detecting active power and reactive power of a load, updating a positive feedback coefficient in real time through a particle swarm algorithm, and substituting the improved AFDPF algorithm to update a disturbance direction; and judging whether an islanding effect occurs or not according to the PCC point frequency, and generating a solution. The particle swarm optimization algorithm is used for improving the positive feedback coefficient h in real time, meanwhile, the AFDPF algorithm is optimized, the detection accuracy is improved, the detection blind area is greatly reduced, the detection time is greatly shortened, and meanwhile harmonic waves disturbed and injected into a power grid are restrained.

The present invention discloses a method for suppressing harmonics of permanent magnet synchronous motor current, which comprises: establishing a mathematical model of permanent magnet synchronous motor in synchronous rotating coordinate system d-q; setting a reduced-order vector resonance controller, and connecting the reduced-order vector resonance controller in parallel to a current loop; setting a controller based on reduced-order vector resonance and generalized anti-disturbance control, wherein the reduced-order vector resonance and generalized anti-disturbance control are connected in parallel and serve as a current loop controller. The method for suppressing harmonics of permanent magnet synchronous motor current disclosed by the present invention reduces the harmonic components and can well suppress the harmonics of permanent magnet synchronous motor current.

The invention relates to a voltage stabilizer voltage control method and system based on an adaptive filter. The method comprises the following steps that filter parameters are initialized, and an expected signal is set; obtaining a direct-current voltage of the transmission line, and obtaining an output signal of the filter according to the weight vector of the filter and the direct-current voltage; an error signal is obtained according to the output signal of the filter and the expected signal, and then the output voltage of the voltage stabilizer is adjusted; if the error signal meets the precision requirement, the current output signal is transmitted to an inverter to adjust the output voltage of the voltage stabilizer; if the error signal does not meet the precision requirement, dynamically adjusting a step factor in combination with an NLMS algorithm and a dynamic step factor method, updating a weight vector of the filter in real time according to the dynamically adjusted step factor and the error signal so as to adjust an output signal of the filter, and when the error signal meets the precision requirement, outputting the output signal of the filter. And adjusting the output voltage of the voltage stabilizer according to the output signal. Compared with the prior art, stable high-quality voltage output is realized.

The utility model discloses a frequency hopping frequency source module based on DDS relates to microwave radio communication technical field, including crystal oscillator, power divider and frequency mixer, and power divider and frequency mixer are connected in parallel through first branch and second branch, and first branch includes FPGA chip, PLL chip, DDS chip and first filter who connects in order series connection, and FPGA chip and power divider first output electric connection, and first filter and frequency mixer first input electric connection, and the second output of FPGA chip and the frequency control input of DDS chip electric connection. The utility model discloses the hardware construction under relevant layout, still makes it have the advantage that the output frequency coverage is wide under the original already having the advantage that the frequency switching speed is fast, and the frequency resolution is high.

The utility model discloses a harmonic suppression interdigital filter, which comprises a dielectric substrate, the upper surface and the lower surface of the dielectric substrate are metal layers, the dielectric substrate comprises a plurality of resonators, input / output ports and a grounding plane, the resonators are quarter-wavelength transmission lines, and the tail end of each resonator is provided with a metalized through hole to form the metalized through hole. The metalized through holes of the adjacent resonators are distributed at two opposite tail ends; the input port is a microstrip line with 50 ohm characteristic impedance and comprises an L-shaped or T-shaped demetalized groove; the upper surface of the dielectric substrate is provided with a plurality of resonators which are arranged in parallel, and every two resonators are arranged in opposite directions, so that an interdigital structure is formed. According to the utility model, out-of-band harmonic waves are suppressed without adding extra circuits, and the filter has the advantages of miniaturization, easy processing, large bandwidth and strong harmonic wave suppression.

The application provides a control method and device of a permanent magnet synchronous motor and the permanent magnet synchronous motor, and the method comprises the following steps: S1, obtaining a phase-lagged bus voltage sampling signal by sampling and filtering a bus voltage of the permanent magnet synchronous motor; S2, performing phase compensation filtering on the bus voltage sampling signal to obtain a compensated bus voltage; S3, calculating a real-time duty cycle signal according to a Park inverse transformation output voltage and the compensated bus voltage; and S4, controlling an inverter according to the real-time duty cycle signal to drive the permanent magnet synchronous motor to operate. The application proposes a phase compensation algorithm by using the repetitive periodicity of the bus voltage, so that the compensated bus voltage value is closer to the actual bus voltage value, and the accuracy of bus voltage measurement is improved. The harmonics of the motor current can be effectively filtered out.

The invention belongs to the technical field of inverters, and particularly relates to a three-phase inverter resonance compensation control method, which comprises a power module and a resonance compensation module, and is characterized in that the power module comprises a power conversion circuit, a CL output filter and a protection circuit of a three-phase inverter; the resonance compensation module is mainly a proportional resonance controller (PR controller) and is used for generating harmonic feedback compensation. The control architecture of the whole inverter is double closed-loop control, the voltage control is an outer loop, the current control is an inner loop, and the PR controller is feedback control. Wherein a voltage outer loop adopts proportion and integral control, and a current inner loop only adopts proportion control, so that phase delay introduced by PI of the inner loop and PI of the outer loop is avoided. By setting the control parameters of the voltage control loop and the current control loop, multiple harmonics can be effectively suppressed.