1022 results about "Inrush current" patented technology

The embodiment of the invention provides a closed-loop control method for power driving and protection, and the method comprises the steps: constructing a voltage feedback type circuit through a high-speed operational amplifier, and forming a closed-loop gain structure through a feedback network of the voltage feedback type circuit; the load current of the output end of the voltage feedback type circuit is monitored in real time, and when the load current exceeds a first set threshold value, a protection mechanism is triggered to turn off the output stage; the power-on surge current is limited through the soft start control circuit; phase information of a load reflection coefficient is obtained, an inductance / capacitance combination of the variable dynamic impedance matching network is selected according to phase information table look-up, inductance / capacitance parameters are switched through a relay, and the transmission standing-wave ratio between the power amplifier and a load is optimized; monitoring the temperature of the radiating fin of the power tube, and dynamically adjusting the resistance value of the feedback network; and performing cooperative control of short-circuit protection, over-temperature protection and surge suppression according to the priority. According to the embodiment of the invention, the performance bottleneck in a load fluctuation scene is broken through.

The invention relates to the technical field of power systems, and discloses a voltage regulation system of reactive power compensation equipment, which is characterized in that harmonic interference is filtered and eliminated through a voltage reactive power sensing unit, and accurate power grid parameters are acquired; a load trend pre-judgment unit analyzes the historical load curve and the real-time change trend to generate a future pre-judgment signal; the dynamic compensation calculation unit combines the current power grid state with the prediction to calculate the optimal compensation capacity and generate a switching instruction, after the hybrid switching actuator receives the instruction, a thyristor is triggered firstly to realize inrush current-free conduction, a contactor is switched to maintain low power consumption after the current is stable, and meanwhile, the compensation state monitoring unit performs closed-loop adjustment on parameter deviation, so that the optimal compensation capacity is obtained. The multi-dimensional protection unit prevents overvoltage, overcurrent and overheating, the double-path power supply guarantees continuous operation when the main power supply is abnormal, the intelligent communication unit realizes data uploading and remote cooperation, quick response switching of reactive compensation equipment and guarantee of safety of a large-scale power grid are realized, and inrush current impact in the switching process is effectively inhibited.

The invention discloses a transformer inrush current identification and early warning integrated method based on multi-sensor fusion, and relates to the technical field of transformer equipment, and the method comprises the following steps: S1, carrying out the distributed deployment of multiple sensors and the construction of a self-adaptive sensing network; s2, performing multi-dimensional feature correction and time alignment; s3, fuzzy characteristics are extracted, and a complex nonlinear relation in the operation state of the transformer is captured; s4, fusing the data after the fuzzy characteristics are extracted; s5, constructing an inrush current identification model, and carrying out the precise identification of the inrush current of the transformer; and S6, carrying out real-time early warning. According to the transformer inrush current identification and early warning integrated method based on multi-sensor fusion, dynamic extraction and deep learning modeling of multi-modal features are realized by introducing a distributed multi-sensor fusion technology, and real-time dynamic threshold calculation, reinforcement learning optimization and Bayesian fault probability inference are combined, so that the transformer inrush current identification and early warning integrated method is realized. And integration of inrush current identification and early warning of the transformer is realized.

According to the heterogeneous multi-core chip power consumption state control system and the heterogeneous multi-core chip provided by the invention, the power consumption state request of each sub power supply domain is received through the set system hardware power consumption management module, and the driving signal is sent to the corresponding sub power supply domain according to the preset hardware time sequence, so that the corresponding sub power supply domain enters the target state; generating a PMU control signal; and the power management module drives an internal voltage regulator to execute corresponding regulation operation according to the PMU control signal. A special control processor (SCP) is not needed, the system hardware power consumption management module realized by pure hardware is adopted to directly control the power consumption state of each sub power supply domain in the heterogeneous multi-core SoC, the software processing delay is eliminated, the response speed is high, the static power consumption of the power consumption management module is remarkably reduced, and the system is particularly suitable for an ultra-low power consumption scene and has a wide application prospect. And hardware-level surge current protection is realized in a multi-core power-on process.

The invention relates to the technical field of transformers, in particular to an intelligent excitation surge current identification method based on machine learning, which comprises the following steps of: firstly, constructing a simulation model of a high-impedance transformer, and optimizing the model so that the model can output an oscillogram of excitation surge current according with an experimental result according to specified input parameters; a simulation experiment is carried out on the basis, so that the difficulty and the time cost of a manual experiment are greatly reduced; processing and analyzing the data of the simulation experiment to obtain a feature vector; deep learning is carried out on the feature vectors to find the relation between the feature vectors of different parameters; and finally, decision-level fusion is carried out on the multi-modal data set, each parameter independently obtains a decision result and then is fused together, and a final waveform result is output according to positive and negative correlation gains. The prediction and identification of the excitation inrush current are realized; and a basis is provided for suppression of excitation inrush current.

A system for providing inrush current limiting for induction motor starting. The system utilizes a pre-start controller to initialize operation of a controller including multiple switches for controlling the voltage delivered to a motor having multiple phases. The pre-start controller activates each switch and determines whether a phase current flowing through the switches satisfies a threshold current. The switches are deactivated a phase current satisfies the threshold current. The pre-start controller determines an activation order for each phase and orders phases having higher phase currents higher in the order than lower phase currents, and determines an activation timing. Based on whether the highest phase current is positive or negative, the pre-start controller then activates, using a voltage at a corresponding angle and based on the activation order and activation timing, the phases to de-saturate the flux generated by the phase currents, thereby limiting an inrush current provided to the motor.

A current control module is for controlling an in-rush current resulting from the initiation of an electrical connection of a battery to an electrical load, wherein a metal-oxide-semiconductor field-e

Inrush current in a memory such as SRAM cache may be managed by using one or more integrated delay elements such as inverters, RC delay lines, and the like to significantly slow down power down signal propagation between memory instances in a memory array. The delay in some examples may be between memory instances, while in other examples the delay is also introduced between bitcell arrays within a memory instance. By staggering the power up times of interconnected or chained memory instances, inrush current when powering the memory instances on or resuming from an inactive state may be reduced.

The grid connection method is suitable for the field of connection of a low-voltage load independent power supply system into a medium-voltage power grid, and is an independent power supply system grid connection method which can give consideration to important load uninterrupted power supply and transformer starting inrush current suppression at the same time. Considering that the capacity of an energy storage battery is limited and power supply of all loads is difficult to support, the loads are divided into sensitive loads and general loads, and when a main network loses power, the energy storage battery supplies power to important loads through a hybrid transformer; in the reclosing grid connection process, the starting inrush current and time of the transformer are effectively reduced through voltage and current multi-control mode switching of a converter in the hybrid transformer device, and meanwhile uninterrupted power supply of an important load is guaranteed; and after the grid-connected starting of the passive transformer is completed, the medium-voltage power grid is switched to supply power, and a general load at a low-voltage side is put into use. According to the method, the problem that the sensitive load needs secondary power failure after the power grid loses power in a traditional power supply mode is solved, the service life of the passive transformer is effectively prolonged, and the working efficiency of the low-voltage important load is effectively improved.

The invention relates to the technical field of transformer excitation inrush current suppression, in particular to a high-impedance transformer excitation inrush current suppression method and system, and the system comprises a data collection module, a data preprocessing module, a calculation module, a main control module, an output module and an execution module. The method comprises the following steps: firstly, establishing a finite element model based on hysteresis characteristics, and collecting real operation data of a transformer and taking the real operation data as input to train the finite element model; continuously optimizing the model, and performing a simulation experiment by using the optimized finite element model to obtain simulation experiment data so as to construct a data set R, thereby greatly reducing the labor capacity of a manual experiment and quickly obtaining a large amount of simulation data; feature extraction and deep learning are carried out based on a neural network model, so that a prediction model about the excitation surge current is trained; then actual operation data of the transformer are collected, and the magnetizing inrush current is predicted by using the prediction model; and a proper closing angle or opening angle is selected to control the operation of the transformer, so that the purpose of reducing excitation inrush current is achieved.

The invention discloses a power distribution network island grid-connected smooth switching control method and system, belongs to the field of power distribution networks, and particularly relates to power distribution system control, and the method comprises the steps: carrying out the feature extraction of a first voltage signal at the island side of a power distribution network and a second voltage signal at the main network side of the power distribution network, and obtaining a quantitative feature value; inputting the quantized characteristic value into an inrush current prediction model to output a closing inrush current prediction range, calculating a width value and a peak amplitude of the prediction range corresponding to each phase time sequence to identify a target phase interval, and evaluating stability contribution of each phase time sequence in the target phase interval to determine a target closing time sequence; and adjusting the output characteristic parameters of the inverter according to the target closing time sequence to obtain an inverter output signal, performing iterative optimization to adjust phase difference compensation, and generating a grid-connected control instruction to control grid-connected smooth switching of the power distribution network island, so that smooth switching during grid connection of the power distribution network island and the main network can be realized, and the stability of the power distribution system is improved.

The invention discloses a power type negative temperature coefficient thermistor and method for suppressing surge current, and relates to the technical field of negative temperature coefficient thermistors, the thermistor comprises a core body and pins, the pins are respectively arranged on electrodes on two sides of the core body by adopting a multi-contact-surface structure, and the pins are arranged on the two sides of the core body. The core body is made of a Mn-Co-Ni-La oxide with a nano composite gradient structure; the Mn-Co-Ni-La oxide with the nano-composite gradient structure determines the upper limits of core capabilities such as surge suppression, wide temperature stability and low power consumption of the thermistor, and the redesign of the pin is the key of performance transfer, so that the electrical properties (low contact resistance and high surge tolerance) of the Mn-Co-Ni-La oxide with the nano-composite gradient structure are not counteracted by structural defects; the arrangement of the bracket prevents the Mn-Co-Ni-La oxide with the nano-composite gradient structure from losing the effect due to heat accumulation and physical damage through thermal management and mechanical protection, and the three components supplement one another and cooperate with one another, so that the performance of the thermistor of the Mn-Co-Ni-La oxide with the nano-composite gradient structure is guaranteed.

The invention belongs to the technical field of power transformation equipment, and particularly relates to a low-voltage dynamic reactive compensation switching device which comprises a shell, a photoelectric isolation module and a communication module. The shell is in an inverted-T shape, a switching switch is arranged at the front end of the shell, wiring ports are symmetrically formed in the upper side and the lower side of the shell, and wiring bolts are installed on the wiring ports. A photoelectric isolation module is arranged on one side of the shell, and the heat dissipation holes dissipate heat for the photoelectric isolation module. According to the scheme, a thyristor and contactor hybrid switching switch is adopted, zero-crossing switching is realized by the thyristor during dynamic load fluctuation, and inrush current control is less than or equal to 10 times of rated current. And when the static state is stable, the contactor is automatically switched to be conducted, and the power consumption is reduced to 1.5 W and is greatly reduced compared with a pure thyristor scheme, so that the impact is avoided and the energy consumption is reduced. The thyristors are in bidirectional anti-parallel connection, and are matched with zero-cross detection logic of the controller, so that overvoltage and transient harmonic waves in the switching process are thoroughly eliminated, no interference is caused to a power grid, and the service life of the device and power grid equipment is prolonged.

The utility model discloses a soft start system based on excitation current reduction, which is characterized in that a time relay mainly controls the switching of a live wire between a power resistor and an alternating current contactor, the power resistor magnetizes a transformer at the moment of electrification, and the alternating current contactor is connected into a circuit by the time relay after the magnetization is completed; and after the power resistor is short-circuited, the circuit is cut out, so that the purpose of suppressing the excitation inrush current is finally achieved, the excitation effect caused by voltage abrupt change at the power-on moment of the isolation transformer can be avoided, and the excitation abrupt change of the isolation transformer during power-on is effectively reduced.

The utility model provides a pre-charging circuit and an energy storage power supply. The pre-charging circuit comprises a constant current driving module, a pre-charging switch module, a power supply switch module and a voltage conversion module; the constant current driving module is respectively connected with the pre-charging switch module and the photovoltaic power supply, the pre-charging switch module is also connected with the voltage conversion module, and the power supply switch module is respectively connected with the photovoltaic power supply and the voltage conversion module; the constant-current driving module is used for outputting a constant-current signal when the input voltage of the photovoltaic power supply is greater than or equal to a first preset voltage so as to drive the pre-charging switch module to work, so that the photovoltaic power supply pre-charges a capacitor in the voltage conversion module through the pre-charging switch module; the power supply switch module is used for conducting when the voltage of the capacitor is greater than a preset value, so that the photovoltaic power supply supplies power to the voltage conversion module through the power supply switch module. According to the circuit, the surge current at the initial stage of capacitor charging can be reduced, meanwhile, smooth transition from pre-charging to normal power supply can be achieved, and the safety and stability of the circuit are improved.

The embodiment of the invention discloses a power distribution network intelligent grounding inrush current suppression method and device, and the method comprises the steps: collecting the state data of a power distribution network, and generating a line state data set, the state data comprising real-time load characteristics and impedance parameters; analyzing the line state data set based on an edge calculation model, and predicting an inrush current peak value and a waveform characteristic of the inrush current peak value at the grounding moment in combination with a nonlinear load fluctuation characteristic caused by the access of a distributed power supply; a particle swarm optimization model is constructed according to the predicted inrush current peak value, waveform characteristics and load characteristics, a search space is constrained through a local heuristic rule, capacitance and resistance parameters of an RC damping loop are dynamically adjusted, and an optimal damping scheme is generated; on the basis of inter-phase cooperative control logic of a three-phase system, dynamically determining grounding trigger time sequences of all phases in combination with the predicted inrush current waveform characteristics; and a grounding instruction is sent to the three-station integrated mechanism, and the three-station integrated mechanism executes an inrush current suppression operation. According to the invention, efficient inrush current suppression is realized.

Circuits and methods that limit current through power FETs of power converter to reduce damaging current in-rush events, independent of switching frequency, device mismatches, and PVT variations. Embodiments utilize a closed-loop feedback circuit and / or a calibrated compensation circuit to regulate, substantially independent of frequency, the control voltage VGATE applied to a power FET gate. In a reduced gate-drive mode, connecting a feedback or compensation circuit to the gate of an LDO source-follower FET allows the gate voltage to be regulated to control the LDO output voltage to a final inverter coupled to the gate of a power FET so that VGATE is adjusted to provide a reduced gate-drive to the power FET; connecting to the output of the LDO allows the LDO output voltage to the final inverter to be directly regulated to adjust VGATE; connecting to the gate of the power FET allows VGATE to be directly set.

The invention discloses an adaptive virtual impedance-based fault current limiting method for a network-forming converter, and belongs to the technical field of converter control. Comprising the following steps: collecting grid-side voltage, converter-side voltage and converter output current; carrying out current amplitude calculation on the grid-side voltage quantity to obtain a current effective value of the port of the converter; judging whether the current effective value of the current transformer port exceeds a current threshold value of the current transformer; and if yes, self-adaptive virtual impedance is introduced to carry out converter fault current limitation. The resistance part of the virtual impedance is used for suppressing surge current at the beginning of a fault; and the reactance part is used for suppressing the effective value of the fault transient current within the current limiting range. In the fault process, the current virtual impedance value is adaptively changed according to the effective value of the current overcurrent, and the virtual impedance can be automatically quitted after the fault end stage. The method is suitable for fault current suppression of the network-forming converter in various control modes, and has good feasibility and practical value.

The invention discloses a composite switch for reactive compensation capacitor bank switching and a control method thereof, and relates to the technical field of capacitor switching, and the method comprises the steps: detecting the capacity and switching data of each branch in a back-to-back capacitor bank through a reactive compensation controller, and determining a group capacitor to be subjected to switching operation according to a preset switching control condition; the reactive compensation controller determines the switching time sequence of each phase of each group capacitor according to the confirmed input / output operation instruction to be executed and the reference voltage of each group capacitor; and calculating the reactive state and the switching state of the switched power system through the reactive compensation controller. Compared with a conventional switching control method, the automatic phase selection switching control method has the advantages that closing inrush current and overvoltage are lower, the accuracy of phase control switching of the capacitor bank can be improved, high-frequency inrush current and pre-breakdown arcing phenomena can be reduced, meanwhile, the probability of rebreakdown can be reduced, and the service life of the capacitor bank can be prolonged. And the performance of the composite switch switched capacitor bank is improved.

The invention discloses a surge current suppression method and a surge current suppression system for an electricity utilization and acquisition terminal power supply, and the method comprises the steps: designing a surge current suppression circuit which comprises a current input circuit, an EMI circuit, a rectification circuit, a low-power-consumption surge current suppression circuit, an energy storage capacitor and a flyback power conversion circuit; external alternating current is obtained through the current input circuit, and then the external alternating current is converted into first high-voltage direct current through the EMI circuit and the rectifying circuit; the first high-voltage direct current is limited to charge the energy storage capacitor through the low-power-consumption surge current suppression circuit; and the second high-voltage direct current in the energy storage capacitor is transmitted to the flyback power conversion circuit for voltage conversion, and the low-voltage direct current is acquired and transmitted to an acquisition terminal power supply. The low-power-consumption surge current suppression circuit can automatically switch working states, efficiently suppress surge current and reduce circuit power consumption, is high in portability, can adapt to different power supply products by adjusting elements, and meets various surge suppression requirements.

The invention discloses a transformer excitation inrush current suppression method, system and device, a medium and a program, and relates to the field of ships, the method is applied to a ship power generation system, and the ship power generation system comprises a transformer and a circuit breaker connected with the transformer; the method comprises the following steps: acquiring the state of the circuit breaker; if the state of the circuit breaker is a switching-on state, the magnetizing inrush current of the transformer is determined; determining the magnetic flux of the transformer based on the magnetizing inrush current, and selecting a moment when the magnetic flux of the transformer is minimum as an opening moment; determining an opening control angle; correcting the opening control angle based on the opening moment to obtain a corrected opening control angle; if the state of the circuit breaker is the opening allowing state, the transformer is controlled to be opened, and the opening angle is the corrected opening control angle. According to the technical scheme, the technical problem that an existing structure is complex can be solved.

The invention relates to a magnetizing inrush current detection method and device, computer equipment, a readable storage medium and a program product. The method comprises the following steps: collecting a current signal of a transformer port; determining a time domain characteristic parameter, a frequency domain characteristic parameter and a time-frequency domain characteristic parameter of the current signal; determining importance parameters and correlation parameters of the time domain characteristic parameters, the frequency domain characteristic parameters and the time-frequency domain characteristic parameters; selecting a target characteristic parameter from the time domain characteristic parameter, the frequency domain characteristic parameter and the time-frequency domain characteristic parameter according to the importance parameter and the correlation parameter, and constructing a target characteristic vector of the current signal by using the target characteristic parameter; and adopting a pre-trained classification model to generate an excitation surge current detection result of the transformer port based on a comparison result of the target feature vector and a pre-stored excitation surge current feature. By adopting the method, the multi-dimensional characteristics of the current signal in the time domain, the frequency domain and the time-frequency domain can be fully utilized to improve the recognition precision and speed of the excitation surge current.

The utility model discloses a power supply input surge protection and isolation device, which comprises a piezoresistor, a surge decoupling power resistor and a TVS (Transient Voltage Suppressor) tube which are sequentially connected in series, and a self-adaptive surge control circuit which is connected with the surge decoupling power resistor in parallel, when surge overvoltage occurs, the TVS tube is firstly broken down, and transient large current flows through the adaptive surge control circuit; the surge decoupling power resistor is used for enabling the passing surge current to generate relatively large voltage drop after the TVS tube is broken down; the self-adaptive surge control circuit comprises a first MOS tube which is used for conducting transient large current passing through a TVS (Transient Voltage Suppressor) tube; when the voltage drop on the MOS tube is greater than the breakdown voltage of the voltage-regulator tube, the voltage-regulator tube is broken down to trigger the conduction of the triode; when the voltage-regulator tube is broken down, the triode is conducted, so that the GS voltage drop of the first MOS tube is reduced, and the first MOS tube is turned off; when the sum of the clamping voltage of the TVS tube end and the voltage drop of the surge decoupling power resistor exceeds the minimum action voltage of the piezoresistor, the piezoresistor acts, so that high-energy transient interference flows through the piezoresistor, and surge protection is realized. According to the utility model, the surge protection and isolation protection functions of the input end of the power supply can be effectively realized, and the safety and stability of the use of the power supply are ensured.

The invention discloses a pre-synchronization control method for a network-building converter based on a virtual synchronous generator, and the method comprises the steps: collecting the three-phase voltage of the output end of the virtual synchronous generator VSG and the three-phase voltage of a power grid side, converting the three-phase voltage into a voltage component in a two-phase static coordinate system through Clark conversion, and extracting a positive-sequence component; calculating a phase difference compensation coefficient based on the positive sequence component; based on the phase difference compensation coefficient, adaptively setting a PI parameter; and calculating and adjusting the amplitude of the internal potential to finish pre-synchronization. In the working process, through self-adaptive PI parameter setting and amplitude accurate judgment, the pre-synchronization time is shortened, the grid-connected impact current is reduced, and the grid-connected success rate of the micro-grid in a weak grid scene is improved.

The disclosed techniques include reducing inrush current due to the bulk capacitance by pre-charging the bulk capacitance using a charge from a battery provided by a battery charging circuit. An example apparatus includes a switching circuit with an input terminal and an output terminal. The input terminal of the switching circuit is coupled to a power adapter. The apparatus includes a battery charging circuit with a first terminal and a second terminal. The first terminal of the battery charging circuit is coupled to the output terminal of the switching circuit. The second terminal of the battery charging circuit is coupled to a battery. The apparatus includes a bypass circuit with an input terminal and an output terminal, with its input terminal coupled to the output terminal of the switching circuit and the first terminal of the battery charging circuit. The apparatus includes a bulk capacitor coupled to the bypass circuit.

A battery pack charger may include a housing. The battery pack charger may include a battery pack interface provided on the housing and configured to removably receive a battery pack. The battery pack charger may include a power input. The battery pack charger may include an LLC converter including a dual transformer electrically connected between the power input and the battery pack interface. The battery pack charger may include a power factor correction (PFC) boost converter electrically connected between the power input and the battery pack interface. The battery pack charger may include an input inrush current control circuit electrically connected between the PFC boost converter and the battery pack interface.

Provided is a transformer exciting inrush current suppression equipment assembly that realizes the cleaning ability of the mesh ventilation opening by utilizing natural wind power, ensures the cleaning functions of smog and windblown sand, and realizes the fall of attached dust. 【Solution means】 The transformer exciting inrush current suppression equipment assembly includes a transformer 1, a mesh ventilation opening 2 is fixedly attached to the side wall of the transformer, a stopper chute 3 is provided on the inner wall of the transformer, a slide lever 4 is slidably connected inside the stopper chute, a rotating piece 5 with dust is rotatably attached to the side wall of the slide lever, an interlocking block is fixedly attached to the side wall of the slide lever, a fixed plate 7 is attached to the side wall of the transformer, and an interlocking spring is fixedly attached between the fixed plate and the interlocking block. The present invention utilizes the interaction between the slide lever, the rotating piece with dust, the fixed plate, the interlocking spring and the pneumatic assembly, and between the dust collection tank and the rotating piece with dust.

The embodiment of the invention provides a photovoltaic loss reduction device, a switching-on control method, electronic equipment and a storage medium, and belongs to the technical field of circuit breaker switching-on. The device comprises a vacuum circuit breaking module, an inrush current suppression module and an overvoltage limiting module. Step-by-step closing of the inrush current suppression module is controlled at an optimal closing phase angle before closing and pre-discharging of the vacuum circuit breaking module, step-by-step control is performed on primary on-off of a load and an external photovoltaic power grid, steady-state closing of the vacuum circuit breaking module is realized, and a large-scale photovoltaic power station is basically free of inrush current during no-load closing and directly enters steady-state excitation current; the overvoltage generated by the vacuum circuit breaking module is limited through the overvoltage limiting module, and the problem of overvoltage caused by reignition of the circuit breaking module when the capacitor is cut off is effectively solved. During power generation in the daytime, the photovoltaic power grid and the load power grid are subjected to accurate phase selection closing or non-impact access, so that the off-grid no-load loss of the photovoltaic power station which does not generate power at night and in rainy days is effectively reduced.

The invention discloses a high-side driving circuit and a vehicle body controller. The high-side driving circuit relates to the field of vehicle body controllers, and solves the problem that the existing high-side driving circuit cannot meet the requirements of low cost and high reliability. The switching circuit adopts a combined structure of switching tubes and is connected in series between a power supply and a load, and more stable on-off control is realized through cooperation of multiple tubes; the starting threshold circuit responds to an external control signal only when the load impedance meets a preset threshold value, and large-current load driving in the starting stage or forced starting during load abnormity is carried out. The over-current threshold circuit is connected in series with a driving loop of the switching circuit and provides constant over-current turn-off. A voltage negative feedback circuit is introduced into the voltage and potential stabilizing module to realize self-turn-off and keep a turn-off state when overcurrent and short circuit occur, and self-recovery is realized after a fault disappears without depending on logic judgment of an external control unit. The port protection module absorbs the instantaneous high voltage and the surge current. Through the characteristics, the current-carrying capability of the triode is improved, and the application range of the triode switching circuit is widened.

The utility model discloses a surge protection circuit, a power supply circuit and electronic equipment, and the surge protection circuit comprises an energy storage circuit which is used for being coupled with a power supply input circuit and a load circuit so as to receive a power supply input signal provided by the power supply input circuit, and outputting a load power supply signal to the load circuit; the surge suppression circuit is coupled with the energy storage circuit; a bypass tank circuit coupled to the tank circuit and the surge suppression circuit; and the bypass switch circuit is coupled with the energy storage circuit, the surge suppression circuit and the bypass energy storage circuit, and the bypass switch circuit is configured to store energy for the bypass energy storage circuit by using the power input signal when the load power supply signal is lower than a first set threshold value so as to limit the load power supply signal within a second set threshold value. By means of the scheme, the surge protection circuit can effectively restrain the surge current from damaging related circuits, and effectively restrain the surge current from being generated when power input is interrupted for a short time and then recovered, so that it is guaranteed that a load circuit maintains normal work and operation.