26 results about "Soft switch" patented technology

The application relates to the technical field of power distribution networks of power systems, and discloses a fault post-recovery control method for a power distribution network containing flexible soft switches, which comprises the following steps: after a fault occurs, the original main station converter is exited, the active power, the reactive power and the rated capacity of the remaining converters are collected to calculate the dynamic capacity margin, the electrical distance from each converter node to the load center of the system is calculated, the comprehensive score is obtained based on the capacity margin and the electrical distance weighting, the converter with the highest comprehensive score and the capacity margin greater than the preset threshold is selected as the new main station, and the control mode of the new main station is switched; the main station selection mechanism based on the comprehensive evaluation of the dynamic capacity margin and the electrical distance is used to quickly establish a stable voltage frequency reference for the power failure area, the load shedding penalty sub-target and the load hierarchical and phased recovery strategy are used to preferentially guarantee uninterrupted power supply for the first important load under the condition that the transfer supply capacity is limited, and the influence of power failure on sensitive users is effectively reduced.

The application provides a control method, a soft switch control loop, a module, a system, a device and a chip. The method comprises the following steps: calculating the difference between the zero-voltage turn-on current reference value of a target switch in a target power converter at a target time and the preset zero-current turn-off current reference value; judging whether dead-time compensation is needed according to the numerical size relationship between the absolute value of the difference and the preset error threshold value; in the case where the dead-time compensation is needed, compensating the dead-time of the target switch at the target time, and outputting the compensated dead-time and the zero-current turn-off current reference value; or in the case where the dead-time compensation is not needed, outputting the predetermined dead-time and the zero-voltage turn-on current reference value. According to the principle that the inductor current of the power converter at the turn-on time and the turn-off time is opposite, in the case where the dead-time compensation is needed, the dead-time is pre-compensated, so that ZCS and ZVS are realized; otherwise, the realization of ZVS is preferentially guaranteed.

Provided in the present application are a soft switching control method, apparatus and system for a converter, and a readable storage medium. The method comprises: calculating a first modulation parameter of a converter, and generating a plurality of first target driving signals on the basis of the first modulation parameter, so as to control, by means of each first target driving signal, the turning-on or turning-off of a corresponding first target switching transistor, thereby implementing closed-loop control over an output voltage and an input current of the converter; on the basis of the first modulation parameter, calculating a second modulation parameter of the converter that has been subjected to closed-loop control, wherein one of the first modulation parameter and the second modulation parameter is a modulation ratio, and the other is a phase-shift ratio; and generating a plurality of second target driving signals on the basis of the second modulation parameter, wherein the driving signal corresponding to the modulation ratio is used for controlling the turning-on or turning-off of each switching transistor of a matrix circuit, and the driving signal corresponding to the phase-shift ratio is used for controlling the turning-on or turning-off of each switching transistor of a full-bridge circuit. The implementation of the solution of the present application enables the soft switching of all switching transistors over the full voltage range and the full load range.

The application discloses a kind of based on single-stage grid-connected micro-reverse soft switching online real-time monitoring and closed-loop maintenance control method and system, mainly solve the problem of existing zero-voltage opening / non-zero voltage opening boundary difficult to judge and light load zero-crossing region loss soft switch leads to hard opening, its scheme includes: sampling the real-time state variable operated in single-stage grid-connected micro-reverse circuit, based on the sampled photovoltaic side voltage, photovoltaic side current, grid side voltage and grid side phase, respectively calculate internal and external moving phasor;Custom dead time and target level, according to the dead time and the sampled bridge arm commutation current, bridge arm commutation voltage and switching node voltage judge the soft switching state when commutation event k time;Based on the soft switching state, calculate the corrected internal and external moving phasor, output the driving signal of switch tube, to realize the soft switching online real-time monitoring and closed-loop maintenance of single-stage grid-connected micro-reverse.The application can improve the robustness of soft switching implementation, reduce the risk of hard opening, and can be used for soft switching control and energy transmission of single-stage grid-connected micro-reverse.

The application discloses a full-bridge soft switching control method of a resonant converter, a charging pile and a chip, relates to the technical field of direct-current charging, and comprises the following steps: in a starting stage of the charging pile, performing PI algorithm processing on sampling data of the charging pile and preset given data to obtain loop output values of inner and outer loops of the charging pile; judging the size relationship between the loop output values and a preset threshold value to obtain a switching frequency of a driving switch tube; obtaining a period count value of the resonant converter in a period based on the switching frequency and a main clock frequency; performing timing sampling on a voltage of the driving switch tube of the resonant converter to obtain an off time of the driving switch tube; compensating the period count value based on the off time of the driving switch tube to generate a PWM driving signal; and performing full-bridge soft switching control on the resonant converter based on the PWM driving signal, so that the resonant converter is turned on in a zero-voltage state. The application can reduce the on-loss of the driving switch tube and improve the stability of the resonant converter.

The application discloses a forward converter soft switching control circuit and belongs to the technical field of analog integrated circuits, and aims to solve the problems of poor self-adaptation, low precision and difficulty in compensating system delay of an existing dead zone control scheme; the circuit comprises a zero-voltage switching detection circuit, a charge pump phase detector and a voltage-controlled dead zone time circuit, and the three components form a closed-loop negative feedback loop; the zero-voltage switching detection circuit monitors the drain voltage of a main switch tube and generates a ZVS pulse when the voltage is zero; the charge pump phase detector compares the phase difference between the ZVS pulse and the rising edge of a main switch tube driving signal and outputs an error voltage; and the voltage-controlled dead zone time circuit linearly adjusts the dead zone time according to the error voltage, so that the rising edge of the driving signal is aligned with the zero point of the drain voltage. The circuit can automatically compensate the driving delay, adaptively track the working condition change, realize soft switching, reduce the loss, optimize EMI and balance the high frequency and high efficiency of the converter.

The application provides a TCM mode soft switching control method of a multi-phase interleaved parallel bidirectional DC / DC converter, which comprises the following steps: collecting state information in the operation process of the bidirectional DC / DC converter to generate an outer loop control error; optimizing the parameters of a PID controller based on an improved whale optimization algorithm to obtain an optimized PID controller which is used to output an outer loop control variable; obtaining the outer loop control variable and the collected state information to calculate a theoretical timing variable of synchronous tube delay turn-on; obtaining the total link delay of a zero-crossing detection circuit to calculate the synchronous tube delay turn-on time after compensation; calculating a dead time timing variable according to the current state information; taking the actual switching period of a main phase as a synchronous reference to synchronize the periods of the remaining phases and set a phase offset, so that the phases can stably operate in a preset staggered phase relationship under the condition of non-fixed frequency; and the method can realize the stable soft switching operation of the multi-phase interleaved parallel bidirectional DC / DC converter under complex working conditions such as voltage fluctuation and load change.

The application discloses a kind of distributed photovoltaic access capacity evaluation methods considering extreme weather failure risk, comprising;Establish the dynamic coupling model of meteorological intensity and distribution network equipment failure rate, generate the failure probability distribution evolving with time and space;Typical failure scenario set under extreme disaster is constructed;Establish the double-layer robust optimization model with the maximum of distributed photovoltaic access capacity as upper goal, with the minimum of system active defense cost under extreme scenario as lower goal;Introduce intelligent soft switch, energy storage fast response and network reconfiguration as active defense means in the lower model of double-layer robust optimization model;The double-layer robust optimization model is iteratively solved, and the limit access capacity distribution scheme of each node distributed photovoltaic is output.The application accurately measures and calculates photovoltaic limit access capacity by coupling meteorological and equipment failure relationship, constructing double-layer robust model and introducing multiple defense means, balances photovoltaic consumption and system resilience, and guarantees the safe and stable operation of distribution network.

The application belongs to the technical field of power distribution network planning, and provides a collaborative planning method and system for a remote control switch and an intelligent soft switch of a power distribution network, comprising: determining a power supply recovery process of the power distribution network after a fault occurs in the power distribution network; according to the determined power supply recovery process, considering the collaboration of the remote control switch and the intelligent soft switch in multi-stage power supply recovery, taking the sum of the full life cycle cost of the switch device and the load power outage cost as an objective function, considering the intelligent soft switch operation constraint, the power flow constraint and the network topology constraint in multi-stage power supply recovery, constructing a collaborative planning mathematical model for the remote control switch and the intelligent soft switch; solving the constructed collaborative planning mathematical model to complete the collaborative planning of the remote control switch and the intelligent soft switch of the power distribution network.

The present application relates to the technical field of power distribution system operation planning optimization, and particularly relates to a site selection and capacity planning method based on a reconfigurable multi-terminal soft switch. The technical scheme comprises the following steps: establishing a steady-state operation model of a reconfigurable multi-terminal soft switch R-SOP, wherein the model comprises power balance constraints and capacity limit constraints; constructing a R-SOP candidate location selection model considering interconnection demand, wherein the model performs two-dimensional evaluation on the nodes of the power distribution network through a loss sensitivity index LSI and a voltage deviation index VDI. The present application precisely identifies the optimal interconnection nodes of the power distribution network by constructing a two-dimensional interconnection demand evaluation system integrating loss sensitivity and voltage deviation, and realizes precise site selection and optimal configuration of the reconfigurable multi-terminal soft switch in combination with a double-layer collaborative capacity optimization model considering economy and safety, thereby significantly improving system operation economy, effectively improving power supply power quality, and greatly improving equipment utilization and operation flexibility.

The application discloses an online collaborative optimization method and system based on reflux power and soft switch constraint, mainly solves the problems of reflux power increase caused by transient power and equivalent voltage fluctuation in the existing power frequency cycle and hard switching caused by crossing the soft switch boundary when refluxing. The scheme comprises the following steps: sampling the real-time state variables running in the dual active bridge micro-inverter circuit; calculating the internal and external phase displacement and the objective function based on the sampled photovoltaic side voltage, photovoltaic side current, leakage inductance current, bridge arm equivalent voltage and grid side voltage; outputting the soft switch judgment signal of the bridge arm commutation current at the commutation event k moment according to the judgment signal; based on the judgment signal, the optimization variables are iteratively updated online to obtain the optimal optimization variables; based on the optimal optimization variables, the corrected internal and external phase displacement are calculated, and the driving signal of the switching tube is outputted to realize the online collaborative optimization of the reflux power and the soft switch constraint of the dual active bridge micro-inverter. The application can reduce the reflux under all working conditions and meet the soft switch, and can be used for reflux power suppression of the dual active bridge converter.

This application provides a vehicle control method, a vehicle, and a computer-readable storage medium. The method includes: generating a first switch state signal in response to a touch operation based on a first setting item; synchronizing a second target function switch in a second setting item based on the first switch state signal to obtain a second switch state signal; and controlling an intelligent driving domain controller to execute a control operation corresponding to the second target function switch based on the second switch state signal. This application solves the technical problem in related technologies where multiple functional soft switch settings within a cockpit domain controller interact independently with the intelligent driving domain controller, resulting in low state synchronization and poor driver operation experience.

The utility model discloses a kind of switch machine control circuit of energy storage system multiple control mode, including main circuit, soft switch machine circuit, charging gun trigger starting circuit, high voltage secondary power supply control circuit, switch machine button and power connector circuit, button switch detection circuit and charging gun trigger detection circuit;Main circuit is connected with soft switch machine circuit, charging gun trigger starting circuit, switch machine button and power connector circuit, button switch detection circuit respectively.The utility model can reduce the quantity of power device in energy storage system switch machine loop, thereby make energy storage system cost reduce;And the circuit of the utility model can be controlled by small signal to high voltage large current signal, avoid operator direct contact with high voltage live device directly, avoid personnel to be injured.

The application discloses a transmission power limit calculation method of a DC soft switching device in a DC microgrid group, and aims at solving the problem that the transmission power limit of a DC-SOP in a DC microgrid group is difficult to accurately quantify due to double constraints of control and capacity, and comprises the following steps: firstly, a DC microgrid containing multiple distributed power sources and constant power units is equivalently aggregated into a port droop model; then, the model is combined with DAB transmission power, and the operating range of a DC microgrid bus voltage and the DAB phase shift limit are considered, and the analytical expressions of the forward and reverse power transmission of the DC-SOP are respectively given, and the asymmetry of the bidirectional transmission power limit caused by the droop control is disclosed. The application provides a clear power boundary for the planning and operation of a DC-SOP interconnected microgrid system, and is helpful to improving the safety and economy of the system operation.

The application discloses a kind of electromagnet soft switch driving circuit and vibration control system in the field of vibration control.The driving circuit includes bus capacitor, high-side switching device, low-side switching device, auxiliary switching device, resonant inductor, resonant capacitor, load electromagnet, auxiliary freewheeling diode, low-side freewheeling diode and high-side freewheeling diode.The two ends of resonant capacitor are respectively connected with the second end of load electromagnet and the anode of high-side freewheeling diode;the first end of resonant inductor is respectively connected with the second end of load electromagnet, the anode of low-side freewheeling diode and the first end of low-side switching device, and the second end is connected with the first end of auxiliary switching device and the cathode of low-side freewheeling diode connected through auxiliary freewheeling diode.The application reduces the voltage slope of the two ends of electromagnet, thereby reducing the overall EMI level of vibration control system, so that it has EMC performance passing through radiation and conduction test when full load.

This invention discloses a power regulation method, device, medium, and product for distribution networks, comprising: acquiring network topology data, first operating data, and baseline configuration parameters of flexible soft switches in the distribution network; inputting the network topology data, the first operating data, and the baseline configuration parameters into a preset decision model, aiming to minimize the sum of the configuration cost of the flexible soft switches and the line loss cost of the distribution network, and solving the model under preset constraints to obtain a target decision result, wherein the target decision result includes the target location, target capacity configuration, and target power flow allocation scheme of the flexible soft switches, and the constraints include distributed energy utilization constraints, flexible soft switch constraints, and power flow constraints; and using the target decision result to perform power regulation on the distribution network. This invention can improve the accuracy of power regulation in distribution networks.

The application discloses a soft switching control circuit and a control method of a flyback converter. The soft switching control circuit of the flyback converter comprises a negative excitation module connected with a winding of a transformer, the negative excitation module forms a current loop with the winding when turned on, a negative excitation current is generated on the transformer, and the junction capacitance charge of a first switch tube is released after the negative excitation module is turned off; and a switch control module connected with the first switch tube, a second switch tube and the negative excitation module, outputs a switch control signal to control the turn-on and turn-off of the first switch tube and the second switch tube, and outputs a negative excitation signal to control the turn-on or turn-off of the negative excitation module. The scheme of the application can generate a negative excitation current in the transformer when the first switch tube and the second switch tube of the flyback converter are both in the turn-off state, release the junction capacitance charge of the first switch tube, make the source-drain voltage drop to zero, realize the soft switching control of the first switch tube, reduce the switching loss and improve the transmission efficiency.

The application provides a high-gain DC converter, the converter is composed of two-phase interleaved parallel branches, and comprises an input power supply, a main switch, an active clamping switch, a resonant inductor, a three-winding coupled inductor unit, an energy storage capacitor, a freewheeling diode, an output diode and a load unit. The primary winding of the two coupled inductor units serves as an input filter inductor, and the secondary winding is cross-coupled to form a CLLL voltage doubling unit together with the energy storage capacitor and the freewheeling diode, thereby realizing high-gain output. The converter realizes soft switching operation of all active switches by setting the complementary conduction and dead time of the main switch and the clamping switch, and constructs a resonant circuit, thereby reducing the switching loss. The application has the characteristics of high voltage gain and high efficiency, is suitable for a power processing unit (PPU) of an electric propulsion system, and can effectively meet the stringent requirements of a high-voltage and high-power module inside the PPU on wide-range input, high-gain output and high-efficiency energy conversion.

This application provides a soft-switch setting method, apparatus, electronic device, and vehicle, relating to the field of intelligent vehicle technology. The method includes: receiving a soft-switch function requirement; determining, based on the soft-switch function requirement and a preset function database, whether a target signal identifier corresponding to the soft-switch function requirement exists; responding to the existence of a target signal identifier, determining, based on the target signal identifier, whether a target signal matrix corresponding to the target signal identifier exists in a signal matrix database; responding to the existence of a target signal matrix in the signal matrix database, determining a corresponding signal control strategy based on the target signal matrix and the soft-switch function requirement; and generating and displaying the target soft switch on a display system according to the signal control strategy. The technical solution of this application enables personalized soft-switch settings for vehicle functions, improving the adaptability of the soft switch on the display system to user needs.

The utility model discloses a kind of power supply maintaining circuit structure and electronic equipment based on POE_PD, including POE PD module, dummy load branch, control branch and MCU or CPU module.Dummy load branch is composed of resistance R1 and transistor Q1, control branch is constituted by transistor Q2 and relevant resistance, and the working state of dummy load is dynamically switched by PWR_ON signal.When PWR_ON is pulled low, dummy load access circuit provides at least 10mA current, ensures POE system online;When PWR_ON is pulled high, dummy load stops working to reduce power consumption.It can solve the problem of POE system offline caused by light load under soft switch-off state, while taking into account the power consumption optimization during normal operation, suitable for various POE power supply products.

This invention relates to the field of DC-DC converters, and particularly to a wide input / output range soft-switching DC-DC converter and its control method. It includes an input circuit, a transformer, and an output circuit; the input circuit is a half-bridge circuit; the primary winding of the transformer is connected to the midpoint of the bridge arm of the half-bridge circuit via an inductor Lr; switches BS1 and BS2 are connected between the first end and the middle end of the secondary winding of the transformer; switches SR1 and SR2 are connected between the first end and the second end of the secondary winding of the transformer; a load and a capacitor CD2 are connected between the second end and the middle end of the secondary winding of the transformer. This invention achieves ZVS soft switching over a wide input / output range and under wide load conditions. It has multiple operating modes, effectively improving converter gain, power rating, and power density, and limiting voltage stress on the output-side power devices.

The application relates to a flexible interconnected power distribution network collaborative scheduling method for post-disaster recovery, comprising the following steps: respectively establishing a time period decoupling power model of an energy storage type flexible soft switch system and a fault element repair sequence optimization model; taking the time period decoupling power model of the energy storage type flexible soft switch system, the fault element repair sequence optimization model and power distribution network topology reconstruction as pre-decision variables, constructing a collaborative optimization scheduling model considering new energy uncertainty with the lowest comprehensive cost as a target; and solving the collaborative optimization scheduling model by using a double-layer iteration extreme scene generation algorithm based on infinite dimension linear programming duality to obtain scheduling decisions. The application can fully exert a collaborative effect and improve a post-disaster load recovery ratio of a power distribution network.

The application discloses a flying capacitor type Boost converter, a soft switching control method, a medium and equipment; the converter further comprises a resonant inductor and two resonant capacitors on a traditional architecture; the resonant inductor is connected in series between the middle node of a series branch formed by an energy storage inductor and two switch tubes, and the two resonant capacitors are connected in parallel with the two switch tubes respectively, so that the resonant inductor and the resonant capacitors constitute a resonant loop for soft switching conduction of the switch tubes. The soft switching control method performs soft switching conduction on the switch tubes of the converter; the medium, equipment and system are used for implementing the soft switching control method. The application has the beneficial effects that the simple resonant loop constructed by the resonant inductor and the resonant capacitor can realize soft switching conduction of all the switch tubes, and can effectively reduce the switching loss. Since the soft switching is realized, the switching frequency can be significantly improved, and the volume of the magnetic elements in the converter can be greatly reduced.

The application provides a switching power supply system and a switching frequency adjusting method and device. The method comprises the following steps: obtaining a system total deviation of the switching power supply system; calculating a first adjusting frequency according to the system total deviation and an initial frequency; the system total deviation is determined by a device deviation of a soft switch and a deviation of a power supply control chip; the initial frequency is used to represent a switching frequency at an initial moment of the switching power supply system; calculating a first test efficiency according to the first adjusting frequency; the first test efficiency is used to represent a power conversion efficiency of the switching power supply system when the switching frequency is the first adjusting frequency; determining an optimal frequency according to an initial efficiency and the first test efficiency; the initial efficiency is used to represent the power conversion efficiency of the switching power supply system when the switching frequency is the initial frequency; and online burning the optimal frequency to the power supply control chip, so that the power supply control chip controls the soft switch to turn on and turn off according to the optimal frequency. The method is beneficial to realize the switching power supply system with high power conversion efficiency.