298 results about "Voltage loop" patented technology

The invention provides a fault ride-through control method and a fault ride-through control system for a grid-forming converter, which are characterized in that the current of the grid-forming converter under an asymmetric fault is controlled by adopting a negative-sequence current reference generation strategy aiming at an inner ring of a controller, and negative-sequence reactive current is injected into a power grid; adopting a partial sequence current amplitude limiting strategy to control the maximum phase current amplitude of the injected asymmetric current not to exceed an amplitude limiting value; controlling the boundary of an active reference value by adopting an active reference value amplitude limiting strategy for an active synchronization ring; a synchronous damping link is adopted to enhance damping in power angle swing; for a reactive voltage loop, a reactive voltage variable coefficient control strategy is adopted to control the output of the maximum reactive current; and an internal potential locking strategy is adopted to suppress overvoltage. According to the invention, negative-sequence reactive power is provided, and overcurrent of each phase is avoided; the power angle characteristic is improved, and the transient stability is improved; stable transient voltage support is provided in a current output capability range; and after the fault is recovered, the voltage of the converter grid-connected point is smoothly recovered.

The invention relates to the technical field of new energy power system control, and relates to a power decoupling method for cooperative control of voltage feed-forward compensation and adaptive virtual impedance. The method comprises the following steps: acquiring a power grid current and a power grid voltage, and calculating a reactive power measured value and an active power measured value of a power grid; virtual synchronous machine control is carried out, and a voltage feed-forward pre-compensation item is introduced into a reactive power control loop; calculating a reactive power control loop after VSG compensation, and obtaining VSG output side voltage and instantaneous angular frequency; self-adaptive virtual impedance control is adopted, a self-adaptive virtual impedance reference value is calculated, line impedance is dynamically adjusted, and a voltage loop input instruction voltage is calculated according to the line impedance; and adjusting the output performance of the inverter according to the instruction voltage. According to the invention, the problem of power fluctuation caused by VSG output voltage amplitude variation is effectively solved, and the dynamic influence of a power coupling item is weakened.

The invention discloses a buck-boost circuit-based mppt charging current backflow prevention control method, and relates to the technical field of switching power supplies, and the method comprises the steps: collecting a photovoltaic input voltage, a battery output voltage, and an inductive current flowing through an inductor; the current input power is calculated based on the photovoltaic input voltage and the inductive current, and the reference voltage is dynamically adjusted through an MPPT loop algorithm; pI voltage loop operation is carried out on the output voltage and the adjusted reference voltage, and expected charging current is generated; pI current loop operation is carried out on the expected charging current and the inductive current sampling value after proportionality coefficient adjustment, and a PWM duty ratio control signal is output to adjust the driving states of the four switching tubes; when the judgment circuit is in an intermittent conduction mode and meets critical conditions, a driving signal of the fourth switching tube is shielded, and only a body diode realizes a current path to prevent reverse flow of current; the battery current is effectively prevented from flowing backwards, and the system safety and the energy utilization efficiency are improved.

The invention belongs to the technical field of new energy, and particularly relates to a fault voltage ride-through optimization method and system for a network construction type energy storage converter. Carrying out positive and negative sequence separation and Clark-Park coordinate transformation on the three-phase power grid voltage and the inversion current, calculating active power and reactive power of the network-forming type energy storage converter, and carrying out power loop control to obtain three-phase reference voltage and angular velocity; performing voltage loop control, and dynamically adjusting a positive sequence active current and a positive sequence reactive current according to whether a low-voltage-crossing indication signal exists or not; performing positive-sequence current loop control and negative-sequence current loop control, and then performing inverse Clark-park conversion to obtain positive-sequence three-phase reference voltage and negative-sequence three-phase reference voltage; and superposing the positive-sequence three-phase reference voltage and the negative-sequence three-phase reference voltage for PWM (Pulse Width Modulation). According to the invention, when the power grid voltage is unbalanced due to a fault, the oscillation of the direct current side voltage and power caused by the negative sequence component is eliminated, and the power angle stability is improved and the fault current is suppressed by dynamically adjusting the related reference value during the fault voltage ride-through period.

The invention provides a stability analysis method and system for a tracking and networking inverter hybrid system and a medium, and the method comprises the steps: selecting the active power of a tracking inverter and the reactive power of a networking inverter as core variables through working condition variable dimensionality reduction; determining a working condition range in combination with capacity constraint, performing discretization processing, and calculating dq components of voltage and current of an inverter port based on a discrete working condition; discrete impedance models of the two types of inverters are respectively constructed; the influence of a phase-locked loop controller, a current loop controller and a power loop controller is considered in a following network type, and the effect of a virtual synchronous controller, a current loop controller and a voltage loop controller is included in a construction network type; and calculating a closed-loop transfer admittance matrix of the power grid through the discretized impedance of the inverter to realize stability analysis of the hybrid system. According to the method, the modeling complexity is effectively reduced, the stable working areas of the system under different working conditions can be quantified, and an accurate reference basis is provided for stable operation of the hybrid inverter system.

The invention discloses a multiphase BUCK converter and a high-dynamic self-adaptive phase cutting method. The multiphase BUCK converter comprises a 16-phase power level, a current sampling module, an MOS driving module, a digital control module, a CMCOT simulation main control loop and a dynamic detection circuit. The MOS driving module controls a switching tube in the 16-phase power level, the current sampling module collects an inductive current signal, the input end of the CMCOT simulation main control loop is connected with the output end of the current sampling module, and a PWM control signal is output to the digital control module; the input end of the dynamic detection circuit is connected with an output signal of a voltage loop gain in the CMCOT analog main control loop, and a mark signal is generated and output to the digital control module; the digital control module generates a phase cutting signal. A phase cutting strategy is correspondingly provided, the number of PWM started by a phase cutting signal is adaptively changed, the transient voltage undershoot is reduced, meanwhile, voltage overregulation is avoided, and the transient performance is remarkably improved.

The invention provides a network construction type converter control method suitable for multiple power grid intensities, and belongs to the field of new energy grid-connected stability. The method comprises the steps that the actual output power of an inverter is calculated according to inverter side capacitor voltage and grid-connected current; the actual output power of the inverter and the power reference value control an output internal potential amplitude reference value and an internal potential phase angle through the virtual synchronous generator; subtracting the voltage drop of the grid-connected current on the virtual impedance from the internal potential amplitude reference value to obtain a virtual internal potential; inputting the virtual internal potential as a reference voltage into a voltage and current double-loop controller, inputting a grid-connected current into a proportional differential controller, subtracting the output of the proportional differential controller from the output of the voltage and current double-loop controller, inputting an obtained result into an inverter through an SPWM modulator, and controlling the inverter; the invention also provides a control system of the network-forming converter. Grid-connected current proportional differential feedback is introduced, the inner loop control bandwidth is kept constant in the dynamic change process of the power grid strength, and power-voltage loop harmful coupling is eliminated.

The invention relates to the technical field of switching power supply analog control, in particular to a control method and system for a small-duty-ratio BOOST module based on digital control, and the method comprises the following steps: S1, carrying out the sampling of the equal-proportion reduced output voltage of an operational amplifier through an ADC analog-to-digital converter, processing the sampled voltage value through a filtering algorithm to obtain an output voltage VO; and S2, carrying out calculation processing on the output voltage VO through a PID control algorithm, and obtaining an expected output voltage through a fixed-frequency adjustment duty ratio PWM and a fixed-duty ratio frequency modulation PFM. Efficient and stable voltage boosting is achieved through double-closed-loop digital control, dynamic response and anti-interference capacity are achieved, the core lies in collaborative design of power conversion and a control strategy, input direct-current voltage is boosted to higher stable output voltage, a double-closed-loop (voltage loop + current loop) control strategy is adopted, and the voltage boosting effect is achieved. And closed-loop adjustment is realized by combining PWM driving and ADC sampling.

The invention discloses a fault current calculation method and system for a high-voltage alternating-current submarine cable grounding system and a storage medium, and the method comprises the following steps: enabling a power supply device and an electric device to be equivalent to an impedance and series voltage source combination and a load impedance based on the Thevenin equivalence theorem; in combination with the double-end grounding characteristic, a submarine cable loop is equivalent according to a pi type, and a three-phase equivalent circuit is constructed; determining a fault phase, and dividing the submarine cable as a left side and a right side by a fault point; a voltage loop equation is listed based on the Kirchhoff theorem, and a matrix recursion rule is deduced in combination with a double-side elimination principle. And establishing an analytic relationship between the main sections of the submarine cables at the power side and the short-circuit side and the fault circulating current according to a recursion rule. And with a fault point current equation as a boundary condition, left sheath fault circulation distribution is solved simultaneously. And repeating the steps on the right side to obtain right side distribution so as to obtain fault phase whole-line distribution. According to the method, the circulation distribution can be accurately calculated, the fault analysis accuracy and efficiency are improved, and support is provided for submarine cable operation and maintenance and the like.

The invention relates to an improved network construction type energy storage converter control method and system, and the method comprises the following steps: constructing a conventional network construction type control framework containing P-f and Q-U control rings, and obtaining a basic control model; virtual impedance control including a virtual resistor Rv and a virtual inductor Lv is added in a voltage loop, and a primary improved control model is formed; then virtual capacitive reactance control of a virtual capacitor Cv is added in a current loop, and a final improved control model is obtained; and finally, controlling the converter through the model to realize stable support of the voltage and frequency of the power grid. Through cooperative improvement of voltage loop virtual impedance and current loop virtual capacitive reactance, the method and system can effectively improve the stability and robustness of the converter in a weak power grid environment, enhance the power grid supporting capability, solve the problem of easy instability caused by multi-loop coupling in traditional control, enable the converter to be closer to the external characteristics of a traditional synchronous generator, and improve the stability of the converter in a weak power grid environment. And the requirements of a new energy high-permeability power system are met.

The invention discloses a dual-frequency positive-sequence impedance modeling method for a network-building type energy storage converter considering frequency coupling. The method comprises the following steps: 1, injecting a dual-frequency positive-sequence disturbance voltage signal at a grid-connected point of the network-building type energy storage converter based on a virtual synchronous machine; 2, establishing a linearized small signal model for each control link of an active-frequency loop, a reactive-voltage loop, a virtual impedance-containing voltage and current double closed loop and the like to form a multi-frequency signal model; and 3, according to the multi-frequency coupling relationship between the current and the voltage, constructing a frequency coupling impedance matrix, and reducing a coupling term into output impedance to obtain the positive sequence output impedance and the negative sequence output impedance of the converter considering the frequency coupling, thereby simplifying the model stability analysis. According to the method, dual-frequency positive sequence disturbance is introduced, the coupling effect between different frequency components is effectively described, the defect that a traditional single-frequency modeling method cannot reflect the multi-frequency interaction characteristic is overcome, and the accuracy and applicability of the impedance model of the network construction type energy storage converter under the multi-frequency disturbance scene are remarkably improved.

The invention discloses a pre-synchronization control method and system for a grid-following type energy storage converter based on phase angle compensation, and the method comprises the steps: controlling the voltage amplitude and frequency of an energy storage converter side to be consistent with those of a power grid side through a control module when the energy storage converter is off-grid; measuring the phase angles of the energy storage variable current and the two sides of the power grid through a measurement module; generating a phase angle compensation amount based on the phase angles on the two sides through a calculation module, synthesizing a three-phase voltage reference value based on the amplitude and frequency of the voltage on the power grid side and the phase angle compensation amount, and performing coordinate transformation on the three-phase voltage reference value to obtain a voltage loop reference value; through a compensation module, based on a voltage loop reference value, a grid-connected point phase angle is adjusted through double-closed-loop control and current-limiting protection; and monitoring electrical values of the converter side and the power grid side through a monitoring module so as to judge and switch grid-connected conditions. According to the invention, long-time waiting under a small frequency difference is avoided, the frequency is kept relatively stable, and frequency hopping and voltage / current impact risks caused by large frequency difference adjustment are eliminated.

The invention discloses a bidirectional DC-DC double-voltage loop control method, system, medium and equipment, and relates to the technical field of electric power, and the method comprises the steps: collecting the voltage and current of an input side and an output side of a switch module, and transmitting the voltage and current to a control module; respectively calculating voltage errors based on the acquired input side and output side voltages; establishing a voltage arbitration mechanism, comparing the voltage error of the input side voltage loop with the voltage error of the output side voltage loop, and selecting a voltage loop corresponding to a smaller voltage error value as a target voltage loop; determining a proportionality coefficient and an integral coefficient of a target voltage loop, and taking a current given value of the target voltage loop as an input target value of a current loop; and the duty ratio is calculated through the current loop, the duty ratio signal after amplitude limiting is output to the switch module, and each switch device is adjusted. The target voltage loop is dynamically selected through a voltage arbitration mechanism, voltage fluctuation in the battery charging and discharging process can be handled, the risk of single-side voltage is avoided, and the voltage control precision and stability of the system are remarkably improved.

The invention relates to a new energy grid-connected control technology, in particular to a grid-following type and grid-constructing type dual-mode switching control method and system for a voltage source converter, and the method comprises the steps: building an electrical topology and mathematical model of a grid-connected system, including modeling a main circuit under a synchronous dq coordinate system with a PCC voltage phase angle as a reference, obtaining active P and reactive Q expressions injected into the power grid; under the control of the following network type GFL, a PLL unit, a power outer ring and a current inner ring are adopted to realize synchronization and active / reactive injection control; under the control of the network construction type GFM, a power synchronous ring, an excitation ring, a voltage ring and a current ring are adopted to form network construction control; in the switching process, the current inner ring structure is kept consistent with the reference, when the GFM is switched to the GFL, the output of the power synchronous ring integrator serves as the initial value of the PLL unit integrator, and when the GFL is switched to the GFM, the output of the PLL unit integrator serves as the initial value of the power synchronous ring integrator.

The invention discloses a ripple suppression method, an energy storage power supply and a storage medium, and is applied to the technical field of ripple suppression of energy storage power supplies. The method comprises sampling to obtain an output voltage; based on the output voltage and a preset multi-resonance PR controller, a plurality of first control quantities are calculated, and the first control quantities are in one-to-one correspondence based on the frequencies of the to-be-suppressed voltage ripples; calculating a third control quantity based on the first control quantity and a preset second control quantity output by a voltage loop; and calculating the duty ratio of pulse width modulation according to the third control quantity. A plurality of first control quantities that suppress a voltage ripple of an output voltage are calculated using a multi-resonant PR controller. And then, the plurality of first control quantities are superposed on a second control quantity output by the voltage loop, so that when the voltage loop realizes voltage control, a compensation waveform opposite to the ripple waveform is generated, ripple suppression is realized, and ripples of a plurality of frequencies can be suppressed at the same time. In addition, filter capacitance does not need to be increased, and the hardware cost and the system failure rate can be reduced.

The invention relates to the technical field of new energy power control, in particular to a control method of a network-forming inverter. In order to solve the problem that a traditional grid-forming type inverter can only operate stably in a weak grid environment and cannot adapt to a wide grid intensity working condition, the invention provides a grid-forming type inverter wide grid intensity adaptability control strategy based on equivalent virtual impedance, the equivalent virtual impedance of a voltage loop is improved to be matched with grid impedance, and the grid intensity adaptability of the grid-forming type inverter is improved. Therefore, the grid-forming inverter can stably operate in a strong power grid environment and a weak power grid environment, and is suitable for a power system with high-proportion new energy access.

The embodiment of the invention discloses a current sampling calibration method, electronic equipment and a storage medium. The method comprises the steps of obtaining circulating voltage output by a voltage loop, and judging whether a fluctuation value of the circulating voltage is smaller than a preset fluctuation threshold value or not; when the fluctuation value is smaller than a preset fluctuation threshold value, current loop output values in a preset number of power frequency periods are collected and subjected to filtering processing, and filtering values corresponding to the positive and negative half cycles of the input end are obtained; calculating a difference absolute value of the two filtering values, and judging whether the difference absolute value is greater than a preset calibration threshold; when the absolute value of the difference value is greater than a preset calibration threshold value, selecting one as a reference filtering value, and determining a correction coefficient according to the size relation of the two filtering values; and taking the reference filtering value and the adjustment filtering value processed by the correction coefficient as filtering values of corresponding half cycles according to the level of the polarity signal. By means of the mode, sampling gain deviation of the mutual inductor can be eliminated through self-correction, and performance indexes such as total harmonic distortion and power factors can be improved.

The invention provides a digital control system of a symmetrical half-bridge LLC resonant converter and an implementation method, and relates to the field of DC-DC converters, the digital control system of the symmetrical half-bridge LLC resonant converter comprises an output voltage loop, an output current loop, an input voltage feed-forward module and a digital controller peripheral module; the output voltage loop and the output current loop establish a parallel competition loop structure, the input end of the input voltage feed-forward module is connected with an input voltage sample VinSense, and after a final output value LoopF of the loop control unit is compared with a frequency upper limit set value fmax, a control mode of the LLC resonant converter is switched; and the control system is connected with the digital controller peripheral module and outputs two paths of MOS tube driving signals. According to the invention, rapid automatic switching of loops under different working conditions is realized, the voltage gain range is widened, the dynamic response speed is improved, and the system stability is ensured while the loop response is improved.

The invention provides a control method and device for improving strong network adaptability of a network construction converter and a storage medium, and relates to the technical field of power grids. The method comprises the following steps: acquiring active power and reactive power of a grid-connected point, and inputting the active power and the reactive power into a VSG ring to obtain a virtual synchronous machine internal potential amplitude and a virtual synchronous machine internal potential phase; adaptively acquiring a reference node phase, and subtracting the reference node phase from the internal potential phase of the virtual synchronous machine to obtain a power angle; generating an active reference current and a reactive reference current based on the power angle and the potential amplitude in the virtual synchronous machine; and inputting the active reference current and the reactive reference current into a current inner ring to obtain a switching control signal of the target grid-connected converter. The power angle observer is added in the power outer loop, the current reference value is generated according to the power angle, dependence on a voltage loop is not needed, the reference node phase is obtained in a self-adaptive mode, and better stability performance is achieved under a strong power grid and a weak power grid.

The invention discloses a thermionic cathode ionization gauge anode and cathode voltage automatic adjusting circuit, which is characterized in that a cathode stable emission control module emits electrons after a cathode reaches a red hot state, and the electrons move towards the anode under the traction of anode high voltage under a vacuum condition and flow to a cathode stable emission feedback circuit; after the first sampling voltage is compared with a preset voltage, the power of the heating cathode filament is adjusted to adjust emission electrons, and electron emission current is stabilized; and the anode voltage stabilization module adjusts the voltage output of the power supply module through the voltage division sampling circuit and compares the second sampling voltage with the standard voltage, if the anode voltage becomes large or small, the second sampling voltage is adjusted to output voltage through the voltage stabilization circuit, the output voltage is input to the high-frequency transformation primary side of the transformer, then the voltage is accompanied, a voltage loop is formed, and the anode voltage is stabilized. The circuit realizes automatic adjustment of the anode voltage and the cathode voltage of the hot cathode ionization gauge, so that the anode voltage and the cathode voltage are stable, and the vacuum test precision of the hot cathode ionization gauge is improved.

The application provides a control method, device and equipment of a permanent magnet motor power generation system and a medium, the method comprising: obtaining a capacitance value of a support capacitor in a target permanent magnet motor power generation system, and a current input power and a current output power of the target permanent magnet motor power generation system; calculating a power difference value of the current input power and the current output power; performing integral calculation on the power difference value based on the capacitance value to obtain a voltage square value of the support capacitor; and performing feedback control on a voltage loop and a current loop of the target permanent magnet motor power generation system based on the voltage square value. The control method, device and equipment of the permanent magnet motor power generation system provided by the application take the voltage square value of the support capacitor as feedback to balance the difference between the input power and the output power and enhance the voltage stability of the direct current support capacitor.

The invention discloses a multi-inverter module off-grid parallel operation control method and a storage medium. According to the control method, a three-ring series control method comprising a power ring, a voltage ring and a current ring is adopted for each inverter module; power distribution is carried out among the multiple inverter modules according to an agreed droop curve; the power loop is used for controlling power output of the system; the power loop introduces virtual synchronous machine control and power correction according to an agreed droop curve to obtain voltage frequency and amplitude needing to be output; the voltage loop is used for maintaining the stability of system output voltage; the current loop is used for controlling output current; the voltage loop and the current loop are respectively controlled by positive and negative sequences. Real-time communication of the inverter modules is removed, configuration of the master and slave modules is removed, the inverter modules operate independently, the master and slave modules are not separated, and the problems of power coordinated distribution and the like caused by downtime of part of modules in a multi-inverter module parallel system are solved.

The invention discloses a fault control method and system for a network-building type converter, and the method comprises the steps: freezing an active frequency ring of the network-building type converter when a fault is detected, and correcting a reactive voltage ring of the network-building type converter; wherein the detected fault at least comprises an asymmetric fault, freezing of an active frequency ring is used for stabilizing a transient power angle, and correction of a reactive voltage ring is used for suppressing a fault current. The system corresponds to the method. According to the application, the transient power angle stability of the network-building type converter is realized through freezing the active frequency loop, and the fault current of the network-building type converter is corrected and suppressed through the voltage instruction value of the reactive voltage loop, so that the transient power angle stability and fault current suppression of the network-building type converter during an asymmetric fault period are effectively considered; and the transient performance of the network-forming converter is obviously improved.

This invention relates to the field of industrial frequency furnace control technology, specifically to an industrial frequency furnace temperature control cabinet and a furnace temperature control method. A data acquisition module collects real-time data on the industrial frequency power supply input voltage and furnace load current. A disturbance prediction module predicts the trend of grid voltage fluctuations or load impedance changes based on a real-time data analysis model. A control unit communicates with the data acquisition module and the disturbance prediction module, generating a thyristor trigger signal based on the output of an adaptive dual-loop controller. Based on real-time data or predicted trends, the control unit identifies whether the current disturbance source is a grid-side disturbance or a load-side disturbance. When a grid-side disturbance is identified, the adaptive dual-loop controller is adjusted to increase the regulation weight of the voltage loop, allowing the voltage loop to dominate the generation of the thyristor trigger signal to compensate for voltage fluctuations. This invention achieves precise decoupling and rapid response to dual disturbances, while simultaneously improving the long-term reliability of the system.

The invention relates to an asymmetric fault ride-through control method and system based on a three-phase four-leg virtual synchronous generator, and belongs to the technical field of power electronics and new energy power generation. The invention provides a solution for solving the problems of asymmetric output current, transient overcurrent, weakening of system supporting capability and the like under the asymmetric fault of a power grid in the prior art. The method comprises the following steps: detecting an asymmetric fault of a power grid; freezing a reactive power ring and retaining an active power ring when a fault occurs; determining a voltage drop coefficient and a phase jump angle according to the fault type; directly calculating a three-phase asymmetric excitation electromotive force reference value based on a system phasor geometrical relationship and a current amplitude limiting constraint; and giving the reference value to a voltage loop, and controlling the output of the inverter.

The application belongs to the technical field of power electronic control, and particularly relates to a kind of energy storage converter parallel control method and system.The method comprises: after Clark transformation, Park transformation of three-phase voltage signal and three-phase current signal output by inverter, active power and reactive power are calculated;Reference value of voltage loop and current loop is calculated, and prediction value is superimposed on current loop to obtain direct axis front end voltage and cross axis front end voltage, and then direct axis voltage and cross axis voltage are calculated;Direct axis voltage and cross axis voltage are subjected to SPWM modulation, and inverter bridge arm switch tube is driven to turn on and off to control inverter output.The prediction value superimposed in the application can quickly compensate the reference value required by current loop when load mutates, and then maintain the stability of voltage.

The embodiment of the invention discloses a thermal runaway test method and device for an electric box, and the method comprises the steps: enabling a charging device to be connected with a to-be-tested electric box in an electric cabinet in parallel through a charging line when a housing pair of the electric cabinet is in a grounding state; the electric cabinet at least comprises two electric boxes; the to-be-tested electric box is connected with other electric boxes in the electric cabinet in series, and a series voltage loop is formed in the electric cabinet; the to-be-tested electric box is overcharged through the charging equipment, so that the to-be-tested electric box triggers thermal runaway; and determining boundary conditions of thermal runaway of the to-be-tested electric box based on the collected state parameters of the to-be-tested electric box after thermal runaway of the to-be-tested electric box.

The application provides an LLC resonant converter control circuit and method. The control circuit comprises a main control loop, an LLC resonant converter, and a compensation control loop. The main control loop comprises an output current loop, an output voltage loop and a resonant current loop. The output results of the output current loop and the output voltage loop are input into the resonant current loop. The output signals of the LLC resonant converter are fed back to the output current loop, the output voltage loop and the resonant current loop of the main control loop. The input end of the compensation control loop is connected with the LLC resonant converter, and is used for receiving the output signals of the LLC resonant converter and feeding back to the main control loop. The application can not affect the gain of a high frequency band, greatly improve the gain of a low frequency band, and effectively reduce the low frequency ripple of an output end.

The application discloses a control method and device of a PFC circuit, a power supply, a storage medium and a computer program product, wherein a series resonance module is arranged between an inductor module and a full-bridge module of the PFC circuit; the method comprises the following steps: in the case that the PFC circuit works, the on-off of the series resonance module is controlled according to the inductor current of the inductor module; the control current reference value of the PFC circuit is determined by performing PI control on the output DC voltage of the PFC circuit in a voltage loop; and the duty cycle of all switch tubes in the full-bridge module is determined by performing deadbeat control on at least one of the inductor current of the inductor module, the input AC voltage of the PFC circuit, the control current reference value and the output DC voltage in a current loop. According to the scheme, the series resonance module is arranged in the PFC circuit, PI control is adopted in the voltage loop, and deadbeat control is adopted in the current loop, so that the dynamic response speed is accelerated, the switching loss is reduced, and the overall efficiency of the PFC circuit is improved.