760 results about "Voltage variation" patented technology

The invention discloses an energy storage system state evolution trend prediction method based on multi-source data fusion. The method comprises the steps of terminal voltage, current and temperature time sequence data acquisition, time sequence segmentation normalization, multi-physics field coupling feature construction, trend prediction model construction and training and energy storage system state evolution trend prediction. According to the method, the distinguishing capacity of the model for charging and discharging physical characteristics is improved, meanwhile, the voltage change rate, the multi-dimensional feature vector of the differential internal resistance and the thermal-electric coupling effect and the explicit encoding electric-thermal-resistance coupling relation are constructed, the transient response and the temperature hysteresis effect can be effectively captured, and then the model can be used for analyzing the charging and discharging physical characteristics. A degradation-aware cross-cycle feature extraction and gating mechanism is adopted, short-term fluctuation and long-term trend are adaptively balanced in multi-scale prediction, the prediction conflict problem is relieved, finally, physical constraints based on the electrochemical law and the internal resistance temperature characteristic are embedded in a loss function, it is ensured that the prediction result is accurate in numerical value and conforms to the physical law, and the prediction accuracy is improved. And generation of physically impossible solutions is avoided.

The invention relates to the technical field of power supply equipment power control. The load power track simulation control method comprises the steps of obtaining voltage information and current information of target power supply equipment, determining power deviation information and a dynamic target voltage range generated on the basis of a preset load behavior prediction model, constructing a combined regulation and control weight vector on the basis of the power deviation information, and obtaining a load power track simulation control result. According to the combined regulation and control weight vector and the dynamic target voltage range, constructing a target power evolution trajectory curve by using a physical response inversion mechanism, executing time discretization processing on the target regulation and control trajectory curve, extracting voltage change values and current change values corresponding to each time step, and calculating the target power evolution trajectory curve; and combining the voltage change value and the current change value according to a time sequence to form a control parameter sequence, and generating an analog control instruction matched with the target power evolution trajectory curve according to the control parameter sequence. The method has the effect of improving the real-time response capability of the power supply equipment under complex working conditions.

A measurement apparatus detects a voltage change in a power storage device. The measurement apparatus supplies constant current to the power storage device; measures voltage related to the power storage device supplied with the constant current; and detects the voltage change in the power storage device subjected to the measurement. The measurement apparatus also acquires the voltage change in the power storage device based on an electrical property serving as a reference of the power storage device.

The invention discloses a dynamic virtual impedance control method for multi-machine parallel connection of a network construction type energy storage converter, and belongs to the technical field of power electronics. The method aims to solve the problem that accurate reactive power distribution, circulating current suppression, dynamic response and voltage precision are difficult to consider in a multi-machine parallel system through fixed parameter virtual impedance. A dynamic adjustable virtual impedance module is introduced into the voltage outer loop output end of each converter, and virtual resistance and virtual inductance are calculated in real time based on locally measured output current, bus voltage change rate and adjacent machine reactive power deviation information; and the average reactive power of the system is estimated through a phase synchronization mechanism under the condition of no communication so as to realize multi-machine cooperation. According to the method, the reactive power distribution error is less than 5%, the bus voltage drop is less than 3%, the high-frequency circulating current is controlled within 5% of the rated current under all working conditions, and the dynamic performance and robustness of the system are remarkably improved.

The invention relates to the technical field of semiconductors, in particular to a high-temperature reverse bias test method, an electrostatic discharge protection structure and electronic equipment, and the method comprises the steps: providing the electrostatic discharge protection structure; determining an initial leakage current at the initial voltage, and determining an initial breakdown voltage at the initial current; heating the electrostatic discharge protection structure for a preset time at a preset temperature and a preset voltage, and determining a target leakage current of the heated electrostatic discharge protection structure under the initial voltage and a target breakdown voltage of the heated electrostatic discharge protection structure under the initial current; performing current change analysis on the initial leakage current and the target leakage current to obtain a current change result, and performing voltage change analysis on the initial breakdown voltage and the target breakdown voltage to obtain a voltage change result; and according to the current change result and the voltage change result, generating a high-temperature reverse bias test result of the electrostatic discharge protection structure. According to the invention, the reliability of the electrostatic discharge protection structure can be accurately evaluated.

The invention provides a battery health state assessment method which can be applied to the technical field of artificial intelligence. The battery health state evaluation method comprises the following steps: in response to an obtained charging and discharging voltage curve of a target battery, calculating the differential of voltage along with the change of charging capacity according to the charging and discharging voltage curve, and obtaining an incremental voltage curve; the differential of the charging capacity along with voltage change is calculated, and an incremental capacity curve is obtained; extracting a peak height, a peak position and a peak area in the incremental voltage curve, and a valley depth, a valley position and a valley area in the incremental capacity curve as health factors representing the target battery; and outputting the health state of the target battery based on the health factor of the target battery and a pre-trained support vector regression prediction model. The invention further provides a battery health state evaluation device and equipment, a storage medium and a program product.

The invention relates to the technical field of power distribution network optimization, in particular to a power distribution network voltage dynamic optimization control method, system and device and a storage medium, and the method comprises the steps: judging a mode interval in real time, and judging whether the system operates in a normal state or a fault state according to voltage fluctuation; calculating the photovoltaic residual capacity and the real-time charge state of the energy storage battery; according to the operation state of the system, judging the action state of the energy storage system and the photovoltaic operation mode, and calculating the total reactive power demand of the power distribution network system; on the basis of an improved TOPSIS algorithm, a power instruction is calculated by considering the voltage variation of each node in a power distribution network, the photovoltaic power regulation capability, the charge state of an energy storage system, the available residual capacity of energy storage and the voltage variation of a dominant node caused by unit power, and the power instruction is distributed to an optical storage node. According to the invention, power dynamic distribution under dual modes of a normal state and a fault state is set to ensure stable operation of voltage; and the power distribution network always operates in an optimal state.

The invention provides a method and device for determining the health state of a supercapacitor, and relates to the technical field of supercapacitors, and the method comprises the steps: obtaining the voltage variation and the current variation of the supercapacitor in the operation process; determining a target equivalent resistance value according to the voltage variation and the current variation; determining a target equivalent capacitance value according to the voltage variation and the current value in the corresponding time period; determining a resistance growth rate and a capacitance attenuation rate according to the target equivalent resistance value and the target equivalent capacitance value; and determining the health state of the supercapacitor according to the resistance growth rate and the capacitance attenuation rate. Therefore, the capacitance attenuation rate and the ESR growth rate can be extracted online based on the voltage data and the current data acquired in real time without interrupting the system or adding the test current in the equipment operation process, the process is simplified, and the accuracy and the reliability of determining the health state of the supercapacitor are also improved through the real-time data.

The invention relates to a terminal voltage flexible regulation and control method, and the method comprises the following steps: presetting target voltage parameters which comprise an amplitude value, a frequency and an initial phase angle; calculating a three-phase sinusoidal voltage reference signal based on a virtual synchronous machine algorithm according to the target voltage parameter; according to the three-phase sinusoidal voltage reference signal, generating a driving signal by using pulse width modulation, and controlling the on and off of an IGBT power switch device to generate a three-phase sinusoidal compensation voltage; injecting the three-phase sine compensation voltage into the tail end of a power grid; monitoring the voltage state of the power grid in real time, and calculating the deviation between the actual voltage of the tail end of the power grid and the target voltage parameter; and according to the deviation, adjusting a control parameter in the virtual synchronous machine algorithm, and updating the three-phase sine compensation voltage to compensate the voltage deviation at the tail end of the power distribution network. Voltage deviation can be compensated in time, and the problem of voltage change caused by large fluctuation of electrical load can be effectively solved.

The invention belongs to the field of power device driving, particularly relates to the technical field of crosstalk suppression, and more particularly relates to a crosstalk suppression driving circuit. Through cooperative work of the driving module, the detection module, the buffering module and the clamping module, crosstalk is effectively suppressed while the switching speed is ensured. The driving module ensures normal switching action of the power device; the detection module converts the drain voltage change rate into a detection signal in real time, and recognizes the crosstalk risk in advance; the buffer module suppresses forward crosstalk by absorbing grid forward voltage spikes; the clamping module immediately conducts a low-impedance path from the grid electrode to the negative power supply when the detection signal exceeds a threshold value, and negative crosstalk is quickly eliminated. According to the design, the suppression circuit is only activated when the voltage change rate exceeds the standard, switching delay caused by a traditional fixed buffer circuit is avoided, accurate and rapid crosstalk suppression can be achieved, and finally the suppression effect and the system reliability are remarkably improved while the high-speed switching performance is maintained.

The invention belongs to the technical field of electronic circuits, and provides a low-dropout linear voltage stabilizing circuit, a low-dropout linear voltage regulator, a power supply device and electronic equipment. The low-dropout linear voltage stabilizing circuit comprises a bias module, an input module, an intermediate stage module, an output module, a first compensation module and a second compensation module, the intermediate stage module is connected with the input module, the output module, the first compensation module, the second compensation module and the bias module, and the output module is connected with the input module, the first compensation module and a load. The input module is connected with the bias module. According to the application, the first zero point which is positively correlated with the load current and irrelevant to the output voltage is generated through the first compensation module, namely, the first zero point can be increased along with the increase of the load current, is reduced along with the reduction of the load current, and is not influenced by the output voltage; therefore, the tracking compensation of the load current is realized, and the purpose that the tracking compensation effect does not change along with the output voltage is achieved.

The present application relates to power management technical field, especially to a kind of transient response optimization method based on linear voltage regulator, method includes: obtaining the transient response data of linear voltage regulator when load mutation, judge whether into transient early warning state.If into early warning state, high-frequency noise threshold segmentation is carried out to output voltage waveform, extract voltage rate of change characteristic, construct compensation efficiency model based on dynamic response time and effective compensation bandwidth, calculate optimal open-loop compensation coefficient, and generate compensation control instruction, drive compensation network to carry out dynamic compensation.If not into early warning state, the ripple uniformity data of output voltage is obtained, determine the deviation matrix of actual ripple distribution surface and ideal ripple distribution plane, judge whether there is local ripple abnormal area.The method improves the transient response speed and stability of linear voltage regulator by dynamic monitoring and intelligent compensation, optimizes high-frequency noise processing and ripple uniformity.

A demodulation circuit includes a slope detector circuit and a comparator circuit. The slope detector circuit is configured detect a change in the voltage and determine if the voltage rate of change meets or exceeds one of a rise threshold or a fall threshold. The comparator circuit is configured to set an upper limit and lower limit for rate of change, compare the voltage rate of change to the limits, determine that the voltage rate of change meets or exceeds the limits, if the voltage rate of change meets or exceeds the rising and falling rate of change limits, (v) set a lower limit for a falling rate of change, (vi) receive the voltage rate of change and determine that the voltage rate of change meets or exceeds the fall or rise threshold, if the voltage rate of change meets or exceeds the falling or rising rate of change.

The invention relates to an energy recovery control method based on voltage and voltage difference cooperative control. The method comprises the following steps: monitoring the direct current bus voltage of a lifting frequency converter of lifting equipment through a control monitoring unit; if the DC bus voltage exceeds a preset voltage absolute value threshold, activating voltage difference detection; after the voltage difference detection is activated, calculating a change value of the direct current bus voltage; and based on a comparison result of the change value and a preset voltage change value threshold value, controlling the energy storage unit to perform charging and discharging operation. The method has the beneficial effects that through the energy recovery control method based on voltage and voltage difference cooperation, the operation reliability of the energy recovery device of the lifting equipment is improved.

The invention provides a power battery health state evaluation method and device based on data driving, a medium, a terminal and a program product. The method comprises the following steps: respectively obtaining and screening operation data and laboratory data in a low SOC interval; establishing a dimensional unified mapping relationship between the accumulated discharge amount of the operation data and the cycle index of the laboratory data; calculating to obtain a minimum voltage average value corresponding to each piece of SOC data, and calculating to obtain a voltage change difference value; constructing an actual attenuation model according to the voltage change difference value to extract an actual minimum voltage average value; a reference attenuation model is constructed according to laboratory data, and a standard minimum voltage average value is obtained; comparing and judging based on a preset deviation direction judgment condition to obtain that the SOH value reported by the battery management system is too high or too low; and correcting the deviation of the SOH value based on a preset correction model. The method can adapt to SOH evaluation of a real running scene of the vehicle, the correction precision of the SOH deviation is improved, and the test cost is reduced.

The invention discloses a PT ferromagnetic resonance adaptive collaborative suppression method and system, and the method comprises the steps: sampling a voltage signal, a current signal and a PT secondary side voltage signal monitored by a high-voltage end sensing unit in real time, and calculating a primary side voltage change rate and harmonic content; comparing the calculated primary side voltage change rate and harmonic content with corresponding preset thresholds, controlling to input a neutral point reconstruction unit, and destroying resonance conditions by changing neutral point grounding impedance; after the neutral point reconstruction unit works, the input energy feedback unit is controlled and used for absorbing resonance energy; and when it is detected that the resonance threat is eliminated, the neutral point reconstruction unit and the energy feedback unit are controlled to be turned off in sequence, and active cooling of the high-voltage end sensing unit is started by using residual energy in the energy feedback unit. According to the method, by monitoring the voltage change rate and the harmonic content in real time, a neutral point is rapidly triggered to reconstruct and damage resonance, energy is absorbed and fed back through an energy feedback unit, and finally system safety recovery is achieved.

The invention relates to the technical field of intelligent power grids, in particular to an electric power measurement data intelligent management and analysis system which comprises a time registration module, a path verification module, a behavior recognition module, an exception classification module and a permission desensitization module. According to the method, the consistency of a data acquisition time sequence is realized by utilizing dynamic alignment of measurement point signal features, the capabilities of voltage anomaly identification and path traceability between nodes are enhanced in combination with multi-measurement-point voltage change direction and connection relation analysis, peak valley feature extraction and behavior mode linkage are adopted, and the reliability of the system is improved. According to the method, the identification accuracy and the real-time performance of power consumption behavior abnormity are improved, characteristic classification and standard comparison of power abnormity events are used, automatic classification of abnormity types is more accurate, data type sensitivity and authority linkage is combined, multi-role data desensitization control is optimized, the information security risk in the data management process is reduced to a lower level, and the data management efficiency is improved. And full-flow data link closed loop and automatic management and control are realized.

The invention provides an impedance identification method and system for a series dynamic voltage compensation device, and the method comprises the steps: monitoring the voltage data and current data of a power grid side in real time, and calculating the voltage change rate; judging whether the voltage change rate meets a preset disturbance event triggering condition or not, and if yes, generating a candidate disturbance event; s3, acquiring an operation state signal of the dynamic voltage compensation device, judging whether the dynamic voltage compensation device is in a non-compensation state or not according to the operation state signal, and if the dynamic voltage compensation device is judged to be in the non-compensation state, entering step S3; calculating an active power change rate based on the voltage data and the current data; if the active power change rate is negative, determining that the source of the candidate disturbance event is a power grid side; and if it is judged that the candidate disturbance event comes from the power grid side, calculating and outputting the system impedance of the power grid side based on the voltage data and the current data of the power grid side during the candidate disturbance event.

The invention relates to an active inductor assembly for a power data system and a related method. An active inductor assembly for a data on power (DoP) system includes a first active inductor and a second active inductor. The first active inductor includes a first pass element and a first control circuit. The first control circuit is configured to control the first pass element such that (i) the first pass element simulates the first inductor in response to a change in voltage across the first pass element, and (ii) the first pass unit adjusts a voltage drop across the first pass element during steady-state operation. The second active inductor includes a second pass element and a second control circuit. The second control circuit is configured to control the second pass element such that (i) the second pass element simulates the second inductor in response to a change in voltage across the second pass element, and (ii) the second pass element adjusts a voltage drop across the second pass element during steady-state operation.

According to the buffer output control circuit, the buffer output control method and the LDO circuit applying the buffer output control circuit, the second control signal generation circuit and the second transistor are arranged, and in the dropout state, the second control signal generation circuit generates the high-level second control signal based on the error amplification signal to control the second transistor to be switched on; the potential of the control end of the power tube is pulled down to the ground, the problem of voltage loss on the control end of the power tube in the prior art is avoided, the power tube can be completely conducted in the state, the output voltage changes along with the input voltage, the voltage difference between the output voltage and the input voltage is small, and then the system loss can be reduced; and compared with the prior art, the power tube with a smaller area can be adopted to realize the same technical index. When the output voltage is in a voltage stabilization state, the second control signal generation circuit generates a low-level second control signal based on the error amplification signal to control the second transistor to be turned off, namely, in the state, the buffer output control circuit does not affect the work of the power tube.

The invention relates to the technical field of power grid monitoring, in particular to an operation monitoring method and system for a distributed power distribution network, and the method comprises the steps: generating a plurality of multi-dimensional monitoring surfaces based on a topological structure, real-time electrical parameters and a load side dynamic response simulation result of the distributed power distribution network; determining a plurality of groups of electrical parameter time sequence chains and generating a parameter chain cluster based on the interaction data of the multi-dimensional monitoring surface and the distributed power distribution network and the load side dynamic response data; and the multi-dimensional monitoring surface is a monitoring carrier which is appointed by a user and covers a distribution network topology area and a load response area. According to the method, the load absorption capacity of the distribution network and the power characteristics of the operation state unit can be accurately evaluated by analyzing time series data such as load fluctuation, power change and voltage change, the dynamic response characteristics of the distribution network can be deeply analyzed, and possible load risks can be recognized in advance.

The invention discloses a conventional direct current line single-ended protection method and system based on dynamic time curling, and the method comprises the steps: 1, obtaining the positive and negative electrode voltages of a direct current transmission line, calculating the line mode voltage and the wavelet transformation modulus maximum value of the line mode voltage, and entering a step 2 when the maximum value meets a protection starting criterion; step 2, calculating the maximum value of the absolute value of the voltage change rate of the positive and negative voltage fault components in a preset time window, if the absolute value is greater than a short-distance fault auxiliary criterion threshold, entering step 5, otherwise, entering step 3; 3, calculating a line mode voltage fault component time sequence; 4, calculating a dynamic time curl distance characteristic quantity between the normalized line mode voltage fault component time sequence and the reference waveform time sequence, when the dynamic time curl distance characteristic quantity is smaller than or equal to a fault section identification judgment threshold value, entering the step 5, and otherwise, returning to the step 1; and 5, judging a fault type and a line, and determining a restart control scheme. According to the invention, the problem that the traveling wave protection far-end high-resistance fault is easy to reject operation is solved.

The invention relates to the technical field of network management, in particular to a switch voltage intelligent monitoring and abnormity regulation and control method and system, and the method comprises the following steps: reading port current and power supply voltage register conversion power consumption, writing the port current and power supply voltage register conversion power consumption into a port meter, comparing the port meter with rated power, and reading input / output and mainboard interface voltage according to an identifier; and positioning continuous periodic voltage change drop nodes, and determining a propagation node sequence by combining sampling time. According to the invention, by reading data conversion of a port current register and a port power supply voltage register and according to a power consumption accumulation result, power supply state judgment is associated with port load change, node voltage change is compared and identified by combining a continuous sampling period, and a voltage drop node is identified by combining a working voltage reference value. And a voltage propagation node sequence is obtained according to the sampling time, and the initial position of the power supply path is identified and is combined with the input voltage of the redundant power supply for register state writing, so that a voltage change source has a path association judgment basis.

The invention discloses a battery cluster short circuit rapid identification method and device based on voltage sag. The method comprises the following steps: acquiring a total voltage real-time value of a battery cluster in a current detection period; calculating an inter-frame total voltage change real-time value of the battery cluster based on the total voltage historical value of the battery cluster in the previous detection period; judging whether the inter-frame total voltage change real-time value is greater than or equal to a preset voltage abrupt change threshold value or not; and if yes, judging that the battery cluster has a short-circuit fault, and triggering a protection action. The inter-frame change of the total voltage of the battery cluster is monitored in real time and compared with the preset threshold value, millisecond-level rapid identification and protection of the full-range short-circuit current are achieved, and the technical problem that in an existing energy storage system protection system, due to the inverse time limit characteristic of a circuit breaker and the BMS delay criterion, medium and low short-circuit current cannot be rapidly cut off is effectively solved.

The invention relates to the technical field of power quality monitoring and management, and discloses a power distribution network power quality control method and computer equipment. The method comprises the following steps: acquiring real-time operation data of a power distribution network and an original electric energy quality signal of a disturbance node, decomposing the signal and determining an optimal decomposition modal number by taking minimization of a total variance as a target; determining a key time sequence feature set based on the optimal decomposition mode number and a preset disturbance type label; reasoning by taking a disturbance node as a starting point in the topological structure of the power distribution network to obtain a disturbance propagation path, and determining a voltage change rate of each node; screening candidate measures based on the voltage change rate, the feature set and a threshold value, and constructing a judgment matrix in combination with a preset evaluation index; determining a priority weight based on the judgment matrix so as to determine an optimal governance device; and determining dynamic output parameters according to the index measured values, the reference values and the real-time data, and controlling the optimal treatment equipment to operate according to the dynamic output parameters. The accuracy of controlling the power quality disturbance of the power distribution network can be improved.

The invention relates to the technical field of power distribution system control, in particular to a transformer area voltage compensation control method and system considering distributed power supply fluctuation. Constructing an electric energy quality influence coefficient of each grid-connected point in each time period according to the three-phase voltage and a difference condition among positive-sequence, negative-sequence and zero-sequence components obtained by three-phase voltage decomposition, and calculating a comprehensive disturbance coefficient of a low-voltage transformer area in each time period by combining voltage difference and voltage change trend synchronism among different grid-connected points; the distribution difference and the coupling influence relation between the grid-connected points are comprehensively considered, and the influence characteristics of the fluctuation of the distributed power supply can be evaluated more accurately; the gain coefficient in the sliding mode controller is optimized based on the obtained comprehensive disturbance coefficient, and the adjusted controller is adopted to carry out transformer area voltage compensation control, so that the defect that the transformer area voltage compensation precision and reliability are insufficient can be overcome.

The invention relates to the technical field of energy management, in particular to a mobile power supply energy-saving control system based on energy consumption analysis, which comprises a power behavior deconstruction module, a load state judgment module, a power supply behavior trend module, a pressure relief response rhythm module and an energy consumption abnormity labeling module. According to the method, the power output sequence of the mobile power supply in the non-load state is deeply analyzed, the periodic understanding of the power fluctuation mode is realized in combination with the extraction of the voltage change point location and the current trend period, and the power fluctuation mode of the mobile power supply is obtained through the matching of the power peak section and the voltage drop sequence in the load connection state. According to the method, the continuity characteristic of a power supply behavior is judged, the starting and interruption time of a daily power supply interface is marked in a time dimension, and the time intensity of power abrupt change and an abnormal interval is identified in a voltage withdrawing sequence, so that the judgment of the power supply state of the mobile power supply is more rhythmic and trend-oriented; and the redundant energy consumption is timely identified and avoided in a non-loaded or non-periodic power supply state.

The invention provides a wide voltage input self-adaptive voltage stabilization driving method and system for a direct current contactor, and particularly relates to the technical field of power electronic power conversion. According to the method, the real-time temperature of a coil is determined by monitoring the load current and the input voltage of the DC contactor coil in real time, and the dynamic safety voltage upper limit is calculated accordingly; meanwhile, the voltage change rate of the input voltage in unit time is calculated and compared with a preset threshold value to judge the transient pulse threat. Selecting a driving mode based on a judgment result; when the instantaneous pulse threat exists, selecting a voltage-stabilizing current-limiting mode; when no threat exists and the input voltage is higher than the dynamic safety voltage upper limit, a step-down regulation mode is selected; when the input voltage is lower than or equal to the dynamic safety voltage upper limit, the direct connection mode is selected. And executing the selected mode to generate and output a driving signal. The method solves the problem that in the prior art, overpressure stresses with different properties cannot be effectively distinguished and cooperatively coped with, and the intelligent response and protection capability of the driving circuit is improved.

The invention relates to the technical field of Hall sensors, and provides a Hall element with a triple isolation structure and a preparation method thereof.The Hall element comprises two pairs of Hall contact areas participating in electrical connection and oxide isolation structures located on the two sides of the Hall contact areas and having a certain gap distance. The oxide buried layer completely isolates the Hall plate area in the vertical direction, the Hall plate is completely isolated from the outside through the isolation structure and the oxide buried layer, external direct current interference is reduced to the maximum extent, meanwhile, the thickness and the current path of the Hall plate are controlled, and the effect of reducing noise interference while the sensitivity is improved is achieved. A three-circle surrounding structure is formed by utilizing a P well in contact with the side face of a Hall plate, a PBL in contact with the vertical bottom of an oxide buried layer and connected with the P well on the side face of the Hall plate, an NBL tightly attached to the lower surface of the PBL, an N well connected with the NBL and surrounding the Hall plate and the P well, and a P well connected with a substrate and surrounding the outermost layer, and Hall voltage changes caused by substrate noise and EMI electromagnetic interference are prevented.

The invention discloses a control method of an asymmetric CLLC resonant converter adopting mixed control of track control and PI control. PI control is adopted during steady-state operation of the asymmetric CLLC resonant converter, when input voltage fluctuation is detected, trajectory control is introduced, the frequency of the converter entering the steady state again after the input voltage fluctuation is calculated through the geometrical relationship of a state plane, and steady-state errors are eliminated through a PI controller. The method has the advantages that the combination of the state track control and the linear controller can reduce the voltage change of the output side and shorten the adjustment time when the input voltage fluctuates, so that the problem of severe fluctuation of the output voltage caused by the sudden change of the input voltage when the resonant converter operates is solved, the dynamic performance of the converter is remarkably improved, and the reliability of the converter is improved. Finally, the problems existing in the process of designing the linear controller are solved, the problem of voltage abrupt change of the input side is solved, and the requirements for rapidity and stability are met.