180 results about "Voltage loop" patented technology

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 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 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 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 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 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 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.

The present application relates to the technical field of ripple suppression, and discloses a ripple suppression method and system for a high-voltage electrical network of a vehicle, the method comprising: obtaining a bus voltage ripple waveform under a target operating condition, determining a peak frequency through frequency spectrum analysis; establishing an equivalent impedance model of a high-voltage loop to identify a resonance frequency range; when the peak frequency falls within the resonance frequency range, solving an equivalent inductance increment required by the high-voltage loop under the constraint of a switching frequency characteristic point set and a minimum allowable frequency interval; implementing inductance tuning through equivalent length adjustment of a wire harness or a series inductor device on a high-voltage connection wire harness at a front drive and a rear drive port; re-measuring a ripple index after tuning and comparing it with a threshold value, and if the ripple index does not meet the threshold value, updating the inductance increment and repeating the tuning process. Through frequency domain feature extraction, impedance modeling and frequency avoidance constraint, the present application improves the adaptability and consistency of ripple suppression under different conditions and parameter conditions.

The invention discloses a permanent magnet synchronous motor self-correcting torque ripple suppression system and method, and the system comprises a voltage filtering module which is used for outputting a direct-axis voltage estimation value and a quadrature-axis voltage estimation value of a motor according to the inputted current electrical angular speed of the motor and the direct-axis current and quadrature-axis current after Park transformation; the unscented Kalman filtering module is used for outputting a direct-axis current estimated value and a quadrature-axis current estimated value according to the input direct-axis current and quadrature-axis current after Park transformation as well as the direct-axis voltage estimated value and the quadrature-axis voltage estimated value; the method comprises the following steps: a pole assignment mechanism module, a PI parameter self-correction control module, a current loop PI control module and a voltage loop PI control module, and the method is implemented by adopting the system. According to the method, the estimated value of equivalent direct-axis and quadrature-axis current is observed and obtained in the form of double filtering modules, the observation effect is enhanced compared with that of traditional Park conversion, the robustness of the system is improved, and the anti-interference capability and the control effect are better.

The invention provides a grid-connected inverter frequency coupling suppression and stability improvement method under a weak power grid condition, and belongs to the technical field of new energy. Comprising the following steps: S1, establishing a dq impedance model of a grid-connected inverter based on a main circuit signal and a control signal in a three-phase grid-connected system; s2, analyzing a dq-axis asymmetric coupling characteristic introduced by the phase-locked loop based on the impedance model, and weakening control structure asymmetry caused by the phase-locked loop by constructing a biaxial input symmetric phase-locked loop structure; s3, on the basis of the symmetry principle of a control structure, reconstructing a direct-current voltage control loop, and introducing a q-axis compensation amount into a direct-current voltage control channel to weaken dq-axis asymmetric coupling introduced by the voltage loop; and S4, introducing a feedback regulation mechanism based on the power grid frequency into the symmetric phase-locked loop structure. According to the method, the frequency coupling degree of the grid-connected inverter can be reduced, and the grid-connected stability and the operation reliability in a weak power grid environment are improved.

The invention relates to a network-following and network-constructing mode switching method and device of an inverter and a controller. The method comprises the following steps: acquiring an actual output voltage signal in a network following mode when the inverter operates in the network following mode, and determining a voltage component of a dq coordinate system; the step of configuring the inverter to simulate the operation in the network construction mode comprises the following steps: determining virtual feedback power of the network construction mode according to the actual output voltage signal and the initial virtual voltage signal, inputting the virtual feedback power and virtual reference power into a virtual power ring of the network construction mode, and determining a virtual voltage signal; integral output of the voltage loop is set as a current loop reference instruction in a network following mode; determining a reference current in a network construction mode according to the proportional output voltage and the integral output voltage; and updating the virtual voltage signal to the initial virtual voltage signal, re-determining the virtual feedback power signal until a preset synchronization condition is met, and controlling to switch from the network following mode to the network construction mode. According to the invention, the switching stability of the network construction mode with the inner ring structure can be improved.

This invention relates to the field of power quality management devices, and provides a three-phase voltage balancing control method and system based on a power quality manager. The method includes: sampling the DC-side voltage and three-phase current, load current, and grid-side three-phase voltage of the power quality manager; obtaining phase information through phase-locked loop and combining it with the obtained load current to obtain the harmonic reactive power signal to be compensated; calculating the current value that needs to be adjusted for voltage balancing based on a ramp-up algorithm, and obtaining the reference current of the inner loop by combining the output of the outer voltage loop and the harmonic reactive power signal; obtaining the modulation value after repeated control, and then obtaining the three-phase PWM wave required for the switching transistor control in the power quality manager, thereby achieving the control objectives of grid voltage balancing and harmonic reactive power compensation. This invention solves the problems of insufficient grid-side voltage balancing control performance and current harmonic control management performance during the operation of the power quality manager.

The embodiment of the invention provides an energy storage battery grid-connected peak load shifting control method, device and system, and belongs to the technical field of power system energy storage. The method comprises the following steps: acquiring a real-time sampling value of an output current of a direct-current converter at an energy storage battery side; performing moving average processing on the real-time sampling value of the output current of the direct-current converter to obtain an output value after moving average processing; obtaining a first current value according to the output value after moving average processing and an output current reference value of a rectifier at a generator side, and obtaining a dynamic output voltage reference value of the energy storage battery through dynamic droop control according to the first current value and a real-time sampling value of the output current of the direct current converter; and taking the dynamic output voltage reference value as the input of a voltage loop, and controlling the duty ratio of a power device in the direct current converter through the adjustment of the voltage loop and a current loop.

The application discloses a kind of detection device and method of electric energy metering secondary circuit.The detection device of electric energy metering secondary circuit includes measurement module and control module;Measurement module is used to select A phase voltage output end, B phase voltage output end, C phase voltage output end, A phase current output end, C phase current output end, A phase voltage input end, B phase voltage input end, C phase voltage input end, A phase current input end, C phase current input end and ground terminal at least two are connected, to measure the resistance between any two phase voltage loops of voltage transformer secondary circuit, the resistance between any two phase voltage loops of electric energy meter, B phase ground resistance, A phase current loop resistance of current transformer secondary circuit, C phase current loop resistance and the resistance between voltage loop and current loop of electric energy meter;Control module is used to detect whether the wiring of electric energy metering secondary circuit is correct based on the resistance measured by measurement module.

The invention relates to a frequency converter control method, a frequency converter, a readable storage medium and a program product. The method comprises the following steps: acquiring a power supply phase current under an alpha-beta coordinate system; determining a power supply phase voltage according to the power supply phase current; acquiring a reference voltage and a bus voltage of the output end of the rectification inverter; performing voltage loop control according to the reference voltage and the bus voltage to obtain voltage loop current; performing power control according to the voltage loop current, the power supply phase voltage and the power supply voltage, and determining a reference phase current; the power supply voltage is determined according to the power supply phase voltage; performing current loop control according to the reference phase current and the power supply phase current to obtain a target phase voltage; the target phase voltage is used for adjusting the voltage output by the rectification inverter. By adopting the method, the voltage control is accurate.

The invention relates to the technical field of power electronic control, in particular to a double-closed-loop control method, system and equipment for a network-forming converter and a storage medium, and aims to solve the problems of poor resonance suppression effect, slow dynamic response and weak unbalanced load carrying capacity caused by insufficient damping in the prior art. Firstly, a converter model is established under a synchronous rotating coordinate system, and decoupling is carried out through feedforward; and secondly, the core is that capacitor voltage feedback is introduced to the output of the current controller, a current loop open-loop model is constructed, controller parameters are designed based on root locus analysis, and a current loop pole is configured at an optimal damping point with the damping ratio of 1, so that the resonance of the filter is thoroughly suppressed. And finally, on the basis of the optimized inner ring, voltage ring controller parameters are designed to meet the phase margin requirement. According to the method, the system stability can be effectively enhanced, the voltage response speed and the unbalanced load carrying capacity are greatly improved, and the method is suitable for scenes of new energy grid connection, energy storage, micro-grids and the like.

The application discloses a high-voltage alternating-current submarine cable grounding system fault current calculation method and system and a storage medium, and steps are as follows: based on Thevenin equivalent theorem, power supply and power consumption equipment are respectively equivalent to impedance and series voltage source combination and load impedance; combined with double-ended grounding characteristics, the submarine cable loop is equivalent to a π type, and a three-phase equivalent circuit is constructed; the fault phase is determined, and the submarine cable is divided into left and right sides at the fault point; based on Kirchhoff's theorem, voltage loop equations are written, and matrix recursive rules are derived combined with double-side elimination principle. The analytical relationship between the power supply side, the short-circuit side submarine cable main section and the fault circulating current is established according to the recursive rules. The fault point current equation is taken as a boundary condition, and the left side sheath fault circulating current distribution is solved. The right side distribution is obtained by repeating the above steps on the right side, and then the whole line distribution of the fault phase is obtained. The method can accurately calculate the circulating current distribution, improve the fault analysis accuracy and efficiency, and provide support for submarine cable operation and maintenance.

The utility model relates to the field of electric energy detection, in particular to an insulation monitor for high-voltage direct-current equipment, and the monitor comprises a resistance detection module which is used for detecting the resistance value of an HVPos end to the ground and the resistance value of an HVNeg end to the ground; and the voltage detection module is used for detecting the voltage of the high-voltage loop. The method has the effects of realizing higher reaction speed and reducing the cost.

The application is suitable for the field of energy storage power supply technology improvement, and provides a control circuit and method for high-speed switching of bidirectional DCDC power supply charging and discharging, which acquires the output current of the bidirectional DCDC power supply in real time through an output positive and negative current sampling detection circuit and converts the output current into a differential voltage signal; an output current detection comparison circuit compares the signal and outputs a high / low level signal corresponding to the current direction; a master control unit digital control processor DSC1 controls the power supply to switch between the discharging and charging states immediately according to the jump of the level signal. The application uses simple differential amplification and high-speed comparison circuit to realize microsecond-level fast charging and discharging state following, solves the switching delay problem caused by the dependence of the prior art on communication or voltage loop, and has the advantages of fast response speed, high reliability, low cost, and wide application scenarios.

The invention discloses a novel adaptive terminal sliding mode reaching law-based sliding mode control method for a grid-forming inverter, and the method comprises the steps: 1, collecting inverter side current and voltage and grid side current, and calculating the dq-axis components of the inverter side current and voltage and the grid side current through coordinate transformation; 2, calculating active power P and reactive power Q output by the inverter and active power Pf and reactive power Qf after filtering by using the dq-axis components uod and uoq of the inverter-side voltage and the dq-axis components iod and ioq of the grid-side current; 3, calculating a coordinate transformation angle theta and voltage command values uodref and uoqref of the dq axis of the voltage loop; 4, calculating dq-axis current instruction values idref and iqref of a current loop according to the uodref, the uoqref and a voltage loop sliding mode controller; and 5, according to the idref, the iqref and the current loop sliding mode controller, calculating d-axis and q-axis voltage wave sending instructions udref and uqref, and generating an inverter driving signal through modulation. According to the invention, the harmonic distortion rate of the grid-connected current of the inverter can be reduced, and the dynamic response speed and the anti-interference performance of the grid-forming inverter can be improved.

The invention discloses a display device and a test system thereof, and a voltage regulation circuit, and the voltage regulation circuit for the display device comprises a power unit which is used for providing a turn-on voltage for a display panel of the display device; the current detection element is connected in series in the turn-on voltage loop and is used for detecting a current signal in the turn-on voltage loop in the display panel and outputting a detection current; and the adjusting unit is used for judging whether the display panel has a voltage drift condition or not according to the detection current, and controlling the power supply unit to adjust the magnitude of the turn-on voltage under the voltage drift condition. According to the invention, display abnormity caused by drifting of the threshold voltage of the thin film transistor is avoided. According to the invention, voltage regulation is automatically triggered when current abnormity is detected, and a good display effect can be ensured while dependence on manual intervention is avoided.

According to the automatic driving controller, a first communication interface board 1-1 is connected with ATP equipment, only ATP equipment software is modified, system transformation is easy to achieve, and a network formed by the first communication interface board 1-1 and a second communication interface board 1-3 is convenient to use. The adaptable traction brake interface is a relay, a current loop, a voltage loop, a multifunctional vehicle bus or a motor train unit of a real-time Ethernet; interface expansion is realized through the two communication interface boards, and the device can be suitable for a scene with multiple communication interfaces; the communication interface board is connected with an automatic driving network, the analog quantity acquisition board 1-5 acquires signals of a speed sensor, the ATO main control board 1-2 determines a first traction brake grade and a second traction brake grade to control door opening and closing according to line data, the pressing state of a departure button and speed information, and ATO vehicle control logic is achieved; the ATO main unit 1 can be used for achieving automatic driving of existing CTCS-2-level ATP equipment and can also be suitable for existing line transformation C2 lines, passenger lines and inter-city lines, the train operation efficiency is improved through the ATO main unit 1, and the working intensity of drivers is reduced.

The application relates to the technical field of power electronic control, in particular to a three-phase four-wire converter adaptive resonance control gain adjustment method and system, which comprises collecting real-time output current data of a three-phase four-wire converter, and calculating three-phase current effective values according to the number of sampling points in a power frequency cycle; performing numerical comparison on the three-phase current effective values to extract the maximum value of the three-phase current effective values; constructing a linear function relationship based on the maximum value of the three-phase current effective values and a preset proportional coefficient, and respectively calculating a fundamental frequency resonance control gain for a zero axis and a double-frequency resonance control gain for dq axes; and assigning the calculated fundamental frequency resonance control gain and double-frequency resonance control gain to a voltage loop controller in real time to update control parameters and perform closed-loop control on the converter. The application can adjust the resonance control gain in real time according to the power size.