1439 results about "Current threshold" patented technology

The invention discloses a man-machine exoskeleton cooperation method based on multi-modal signal fusion, and relates to the technical field of exoskeleton program control. The method comprises the following steps that man-machine exoskeleton driving pre-pressure cold and hot mutation analysis is conducted in combination with man-machine exoskeleton man-machine cooperation components; and performing memory alloy spring pre-pressure optimization adjustment in combination with a man-machine exoskeleton driving pre-pressure cold and hot mutation analysis result. According to the invention, cold chain exoskeleton cooperative control is realized through multi-mode signal fusion, and three-level regulation and control are implemented based on a current threshold value and a myoelectricity state: graded current rising / falling and safety early warning are carried out in case of abnormal current; dynamic gain compensation or joint retardation protection is carried out when myoelectricity is abnormal; according to the man-machine exoskeleton cooperative control method and the man-machine exoskeleton cooperative control system, the effect of improving the accuracy of man-machine exoskeleton cooperative control for coping with cold-chain logistics is achieved, and the problem that the accuracy of man-machine exoskeleton cooperative control for coping with cold-chain logistics is disabled in the prior art is solved.

The invention relates to the technical field of electrical performance testing, in particular to a water supply equipment electrical performance detection system based on artificial intelligence, which comprises an electrical parameter acquisition module, an energy efficiency analysis module, an insulation performance evaluation module and a comprehensive diagnosis module. According to the invention, a three-phase voltage and current root-mean-square value is dynamically calculated through a broadband current transformer and a sliding window integration method, a 50Hz fundamental component amplitude is extracted to separate power frequency and high frequency harmonic waves, a continuous period energy efficiency ratio standard deviation triggers an insulation detection threshold value, and a parameter fluctuation and insulation degradation response mechanism is established. Harmonic interference correction synchronous processing energy efficiency ratio and leakage current integration, the detection error being lower than 5%, temperature rise rate linear regression and bearing current threshold value cooperative determination, winding aging cross validation, fault misjudgment rate reduction to 26%, closed-loop detection fusion transient capture, dynamic threshold value triggering and multi-parameter diagnosis, early warning success rate reaching 92%, and positioning response being reduced to 3 seconds.

The invention relates to a PFC-PWM (Pulse Width Modulation) dual-mode control method for a high-voltage direct-current power supply with a wide output voltage range. The output current of the high-voltage direct-current power supply is detected in real time, the critical threshold value of the load impedance is mapped into the hysteresis interval of the output current, the theoretical boundary of mode switching is obtained, and the control mode is dynamically adjusted. In order to further guarantee smooth switching of the two control modes, hysteresis control logic is designed, and undisturbed smooth switching of the PFM mode and the PWM mode is achieved. Based on an energy equivalence principle and a frequency consistency constraint of a critical load SWL working point, a current threshold criterion and a parameter pre-synchronization strategy are constructed, seamless connection of a mode switching process in a frequency domain and an energy domain is ensured, a transient oscillation risk is remarkably reduced, and a guarantee is provided for continuous and stable output of a full-range load working condition.

A method protects against fault arcs in an electric power distribution system in which electric power from an electric feed point is distributed via a common superordinate main distribution line and from the common main distribution line via multiple subordinate output lines. The main distribution line can be interrupted by a main switch, and each of the output lines can be interrupted by a paired output switch. A fault arc current threshold which, when exceeded by a fault arc current of a fault arc, is a precondition for triggering the main switch is matched to the maximum forward current and / or the output trigger duration of the output switches such that a fault arc is quenched selectively either by one of the output switches or by the main switch before the energy released by the fault arc exceeds a specified energy threshold.

The invention relates to a driving control circuit and a switching power supply, the driving control circuit comprises a current sampling circuit and a light-load wave sealing circuit, the current sampling circuit is electrically connected with the light-load wave sealing circuit, the current sampling circuit samples current flowing through a load to obtain sampling current, and when the sampling current is greater than a current threshold value, the light-load wave sealing circuit is electrically connected with the light-load wave sealing circuit; the light-load wave sealing circuit outputs a first control signal to enable the second group of switching tubes to work based on a received second driving signal, so that the switching power supply rapidly quits the light-load wave sealing state, the current-carrying capacity of the switching power supply is rapidly improved, and when the sampling current is smaller than or equal to a current threshold value, the switching power supply is switched off. And the light-load wave sealing circuit outputs a second control signal to drive the second group of switching tubes to stop working, so that the second group of switching tubes are ensured to be closed in a light-load state, the switching loss during light load is effectively reduced, and the light-load energy efficiency is improved.

The invention relates to the technical field of electric vehicle charging, in particular to a charging gun short-circuit fault detection method, and aims to solve the problems that in the prior art, charging gun short-circuit fault detection mainly depends on two technical paths of current threshold triggering and single parameter monitoring, when it is detected that the current exceeds a preset value, a circuit is cut off, detection hysteresis exists, and the detection time is shortened. And pre-judgment cannot be carried out before short circuit occurs, so that the equipment is damaged before the protection action is executed. According to the method, the digital twinning pre-diagnosis model is constructed by fusing multiple physical quantity data, early warning and graded protection of the short-circuit fault of the charging gun are realized by combining multi-dimensional feature fusion and a dynamic risk assessment mechanism, and the method has the advantages of improving the detection timeliness, reducing the misjudgment and missed judgment rate and enhancing the environmental adaptability.

The invention discloses a vehicle-mounted ceiling screen anti-pinch method and device, electronic equipment and a storage medium, and relates to the technical field of vehicles. The method comprises the steps that under the condition that it is determined that the vehicle-mounted ceiling screen is in a starting state, the included angle between the current starting position of the vehicle-mounted ceiling screen and a vehicle roof and the current working current value of a motor used for driving the vehicle-mounted ceiling screen to be started are determined; when it is determined that the degree of the included angle is larger than a first set degree and the current working current value is larger than a first set current threshold value, anti-pinch control operation is conducted on the vehicle-mounted ceiling screen; wherein the first set current threshold value is determined based on a target working current value of the motor after the vehicle-mounted ceiling screen is started for a target set duration. The vehicle-mounted ceiling screen can be accurately and effectively prevented from clamping foreign matters in the starting process, the riding safety of passengers is ensured, and the riding experience of the passengers is improved.

The invention discloses a residual capacity balance control method and system for an aged lithium battery, and relates to the technical field of new energy materials and devices, and the method comprises the steps: inputting quantum magnetic field response data and infrasonic wave signals into a single-chip microcomputer, carrying out the wavelet noise reduction and histogram equalization processing based on an STM32 single-chip microcomputer, and generating an acoustic-magnetic coupling feature matrix; inputting a dynamic pheromone equalization model based on the acoustic-magnetic coupling characteristic matrix, calculating a capacity difference coupling coefficient between the battery packs through an ant colony optimization algorithm, and generating a capacity redistribution path topological graph; according to the capacity redistribution path topological graph, the energy transfer direction is controlled through a bidirectional Buck-Boost circuit, and an equalizing current threshold value is dynamically adjusted based on the quantum spin resonance magnetic field gradient; according to the invention, the quantum magnetic field response data of the aged lithium battery pack and the infrasonic wave signal generated by electrolyte decomposition are collected, so that the physical and chemical states in the battery are accurately monitored.

The embodiment of the invention discloses a defrosting control method and device, an air conditioner and a computer readable storage medium, and relates to the technical field of air conditioners. The defrosting control method comprises the steps that the current of a draught fan is obtained; acquiring a plurality of current characteristics of the current; acquiring environment temperature and environment humidity; determining a dynamic current threshold according to the environment temperature and the environment humidity; based on the multiple current characteristics, the environment temperature, the environment humidity and the dynamic current threshold value, the frosting probability is determined; and when the frosting probability is larger than a frosting probability threshold value, defrosting control is carried out. Therefore, according to the scheme, whether frosting occurs or not can be accurately judged, and accurate defrosting control is achieved.

The invention discloses an intelligent circuit breaker state identification method and system based on an electric signal, and the method comprises the steps: detecting a current flowing through a circuit breaker in real time, and judging whether the current exceeds a preset overload current threshold value or not; when the current exceeds an overload current threshold value, detecting a real-time bending angle of the bimetallic strip at a preset frequency; monitoring the tripping state of the circuit breaker, and generating a circuit breaker fault alarm signal when the real-time bending angle exceeds a preset safety angle threshold value and the circuit breaker does not execute the tripping action. According to the invention, the current is monitored in real time, the bending angle of the bimetallic strip is detected during overload, and the alarm signal is generated during abnormity, so that the fault detection time is greatly shortened compared with the traditional mode, hidden dangers can be found at the early stage of overload, and the circuit is effectively prevented from being burnt out due to long overload time.

A short circuit identification method is provided for a sampling element of a battery management system. A temperature sensor is disposed in a battery management system to monitor a temperature of a discharge transistor, and the method includes: obtaining the temperature of the discharge transistor by using the temperature sensor, and calculating a temperature difference of the discharge transistor in a preset duration; comparing a discharge current obtained by using a sampling element with a preset current threshold; and determining that the sampling element is short-circuited. In embodiments of the present application, the temperature sensor is used to monitor the temperature change rate of the discharge transistor in the BMS system, it can be detected that only one sampling element has a short-circuit fault with reference to the discharge current obtained by the sampling element, and corresponding protection measures are taken, so that the BMS system runs safely and stably.

A level conversion assembly (50), an overcurrent protection method and a display device, the level conversion assembly (50) comprising a level conversion module (51), the level conversion module (51) comprising a control unit (511), a current detection unit (512), a level conversion unit (513) and an overcurrent protection unit (514). When a control unit (511) is at a first falling edge of a digital clock signal (CPV), a first analog clock signal corresponding to the first falling edge in a plurality of analog clock signals (CLK1-CLK8) is determined based on the corresponding relation of the current display mode, and a current detection unit (512) is controlled to detect the current of the first analog clock signal. Since the moment of the falling edge of the digital clock signal (CPV) is located in the last row of the high level period or the low level period in the corresponding analog clock signal, the current detection unit (512) can send an overcurrent signal to the overcurrent protection unit (514) when the current of the first analog clock signal is not located in the current threshold range. The effect of improving the accuracy of over-current phenomenon detection is achieved.

The invention provides a self-adaptive PD charging control method and system based on a double Type-C circuit and a storage medium, and the method comprises the steps: monitoring an interface connection state in real time, collecting power-on current information when peripheral access is detected, and intelligently recognizing a device type in combination with a preset current threshold range and a PD protocol handshake process. The function change-over switch and the charging management module are dynamically configured; if the device is a data device, a data path is connected and power output is limited; if the device is a charging device, charging parameters are negotiated and high-power transmission is started; when the double charging devices are connected, intelligent power distribution and priority management are executed, electrical parameters such as voltage, current and temperature are continuously monitored, and self-adaptive adjustment is triggered when the voltage, the current, the temperature and the like exceed the limit. According to the invention, intelligent function switching and safe power management of double interfaces are realized, the risk of misplug damage is effectively avoided, and the equipment compatibility, the system energy efficiency and the user experience are improved.

The invention relates to the technical field of fault diagnosis, and particularly discloses a method and a system for checking a power fault position of a controller, and the method comprises the steps: collecting the state data of the controller at the current moment; constructing a fault fusion feature vector; judging a main cause branch of a power fault; and a standby branch is accessed by adopting a first-on-second-off mechanism, and a fault branch is cut off. In the prior art, a single voltage or current threshold value is mainly depended on determination, and especially under a dynamic operation condition that a controller has multi-path redundant power supply, rapid identification and switching of a specific fault path are difficult to realize. Due to the fact that the fault vector fusing the multi-source power features is constructed and the multi-factor weighted aggregation judgment mechanism is introduced, the accuracy of fault recognition and the stability of switching operation are improved, the problem of global power failure caused by fault diffusion is avoided, and the power supply continuity and the fault self-healing capacity of a motor controller system are improved.

The invention discloses a parallel operation control method and system of an energy storage converter. The method comprises the following steps: acquiring an output current of a load end of the energy storage converter, generating a state switching signal through the main energy storage converter according to a difference between the output current and a preset current threshold value, sending the state switching signal to the ith slave energy storage converter, and sending the state switching signal to the ith slave energy storage converter through the ith slave energy storage converter. And switching the operation mode of the ith slave energy storage converter or generating an ith state signal according to the state switching signal and the operation state of the ith slave energy storage converter, and sending a state switching signal to the (i + 1) th slave energy storage converter through the main energy storage converter according to the ith state signal. According to the invention, the number of the energy storage converters in the grid-connected / off-grid mode is automatically adjusted according to the change of the load capacity, the conversion efficiency and the adaptive capability of the energy storage converters are improved, and the system benefit is maximized while the load demand of a user side is met.

A multi-phase voltage regulator circuit applied in a multi-phase power converter is provided. The multi-phase voltage regulator circuit comprises multiple comparison circuits. The comparison circuits are coupled to a power output stage circuit and configured to generate multiple control signals The power output stage circuit generates multiple output currents according to the control signals. Each of the comparison circuits comprises a comparator and a correction conversion circuit. The comparator is configured to receive a compensation signal and a reference signal, and receive a correction signal through a first correction terminal and to adjust a duty cycle of a corresponding one of the control signals according to the correction signal. The correction conversion circuit is configured to generate a correction signal according to an error current. The error current represents a difference between a current threshold value and a corresponding output current for the corresponding phase.

The invention discloses an AC excitation system self-starting control method and system, and the method comprises the steps: obtaining a rotor current rotation frequency and an actual rotor rotation frequency, and generating a slip frequency; the slip frequency is compared with a preset dynamic threshold value, and the rotating speed given value is dynamically adjusted; inquiring a preset multi-stage sectional type current control curve according to the actual rotor rotation frequency, and outputting a d-axis current given value; pI adjustment is carried out based on the slip frequency to generate a q-axis current given value, and corresponding preset current threshold limit is applied according to the frequency band where the actual rotor rotation frequency is located; performing independent parameter configuration on the magnetic flux current control loop and the torque current control loop by adopting a non-coupling parameter setting algorithm; and in the unit starting process, under the condition that the stable starting constraint condition is met, an optimal starting parameter combination is generated. According to the invention, by dynamically adjusting the rotating speed given value and controlling the current in a segmented manner, the stable self-starting of the alternating current excitation system is realized, and the reliability and efficiency of the starting process are improved.

The invention discloses an electrical fire fighting Internet of Things monitoring method and system, relates to the technical field of electrical safety and fire early warning, and aims to solve the problem that wiring or stable power supply cannot be realized in special scenes such as specified cultural relics and buildings, and realizes self-sustaining operation of a passive multi-mode sensor through a composite energy collection mode of temperature difference, vibration and light energy. A low-power-consumption mode is intelligently switched when power supply is insufficient, interference factors are collected, temperature and leakage current thresholds are dynamically adjusted by calculating the composite interference factors, the fire risk probability is analyzed and prediction errors are evaluated by combining a lightweight fire prediction model and a local loss function, and the evidence storage frequency is adjusted according to the risk probability based on the evaluation result. The problems of power supply, accurate monitoring, risk assessment, data management and the like in special scenes are effectively solved, the accuracy and reliability of electrical fire monitoring are remarkably improved, and the system has important significance in guaranteeing electrical safety of places such as cultural relics and buildings.

The invention discloses a laser fault diagnosis method based on a neural network. The method comprises the following steps: S10, setting a characteristic coefficient and a basic coefficient in lasers of different degradation types, and calculating to obtain a driving current; s20, using the normalized driving current to replace the driving current, compressing the time length to a set value, performing arrangement to obtain a plurality of data groups simultaneously comprising the optical power, the normalized driving current, the temperature, the current threshold and the wavelength, and dividing the data groups into a neural network training set and a test set; s30, an SE module is introduced to construct an SE-LSTM algorithm, and an Adam optimizer is used to optimize parameters; s40, inputting the neural network training set in the S20 into the neural network model in the S30 for training, and outputting a degradation type by using a multi-classification cross entropy as a loss function of training; s50, evaluating the trained model by using the test set in the S20 through the set evaluation index; the invention further discloses a corresponding system. The attention of the model to important features is significantly improved, and effective and reliable monitoring of the laser is realized.

The invention provides MLPE equipment, a control method thereof and a photovoltaic system, and the MPLE equipment considers that signal reception is abnormal when judging that heartbeat signals are continuously interrupted and received from a first time point to a second time point. If the output current is smaller than the current threshold value, it is indicated that a safe turn-off scene is needed, and the output voltage is controlled to be smaller than the voltage threshold value or the output power is controlled to be smaller than the power threshold value. If it is judged that the output current is larger than or equal to the current threshold value, it is indicated that output can be kept in a communication signal unstable scene, and the output voltage is controlled to be larger than or equal to the voltage threshold value or the output power is controlled to be larger than or equal to the power threshold value from the second time point to the third time point so as to prolong the output time of the photovoltaic system; and the effective hours of the photovoltaic system are improved. And if the heartbeat signal is continuously interrupted and received from the second time point to the third time point, the signal receiving is not recovered to normal all the time, and the output voltage is controlled to be smaller than the voltage threshold value or the output power is controlled to be smaller than the power threshold value.

The invention provides a caliper contact point identification method and device, a storage medium, electronic equipment and a vehicle, and is applied to the technical field of automotive electronics, and the method specifically comprises the steps: collecting the current of a motor, and when the difference value between the collected current of the motor and the predetermined steady-state current of the motor is greater than a current threshold value, determining that the current of the motor is smaller than the current threshold value; recording the position of a caliper contact point when the current of the motor is detected; and on the basis of the caliper contact point position and caliper preset parameters, identifying a caliper contact point when the clamping force of the motor is zero, and performing zero calibration on the basis of the caliper contact point. In the whole process, the contact point of the caliper with the zero clamping force can be recognized without using a pressure sensor, errors caused by temperature of the pressure sensor are avoided, the zero calibration precision is improved, the system performance is improved, a high-precision pressure sensor does not need to be used, the zero calibration cost is reduced, and the whole process is simple and easy to implement. Complex operation is not needed, and the data processing amount of the vehicle is reduced.

The application discloses a control method and device of a vehicle and a storage medium, and belongs to the technical field of vehicle control. The method comprises the following steps: in response to the fault level being a target level and the first detection result indicating that the engine and the ISG motor are in a series working mode, setting the charging target power of the power battery connected in the high-voltage loop to 0, and performing speed closed-loop control on the ISG motor with a speed threshold value as a target speed; in response to the actual torque of the engine being less than 0 and the direct-current bus current being less than a current threshold value, controlling the power battery to be disconnected from the high-voltage loop, performing speed closed-loop control on the engine and voltage closed-loop control on the ISG motor; and supplying power to the traction motor (TM) motor by the ISG motor. The DC bus voltage can be stabilized in the case that the power battery is disconnected, so that the TM motor can stably drive the vehicle to safely travel in the case that the power battery fails.

The invention discloses a control system capable of adjusting the cutting speed, a control method of the control system and an electric anastomat. The driving system is electrically connected with the power supply module; the moving assembly is connected with the driving system; the controller is electrically connected with the power supply module, and comprises a detection unit connected with the driving system and used for detecting current data of the driving system in real time; the data analysis unit is connected with the detection unit and is used for receiving the current data of the detection unit; the control unit is connected with the data analysis unit and the driving system, and the control unit is provided with a plurality of current threshold intervals; the data analysis unit compares the current data with a current threshold interval to obtain a comparison result, and the control unit is used for adjusting operation parameters of the driving system according to the comparison result, so that the cutting speed can be automatically reduced when thick tissue is cut, and the cutting and suturing effects are better.

The invention discloses a full-working-condition driving force optimal distribution control method based on an HCU, and relates to the technical field of new energy automobile control, and the method comprises the following steps: building a long slope energy flux analysis model, generating a time sequence envelope curve of recovery power based on a slope, an automobile speed and a wheel end inertia, and extracting a local peak value interval in the time sequence envelope curve; and in the peak value interval, based on the open-circuit voltage, pulse current and impedance spectrum information of the power battery, online identifying the absorption capacity of the power battery, correcting the upper limit of the state of charge of the power battery, determining a rechargeable current threshold value, carrying out coupling analysis on the threshold value and the recovery power envelope curve, and identifying the reverse current risk time period of the inverter. According to the method, real-time constraint on the absorption capacity of the power battery under the long-slope deceleration working condition is achieved, the inverter reverse irrigation risk is recognized, a peak clipping track and a transient discharge channel are constructed, micro-pulse, accessory absorption and super-capacitor shunting are fused, energy closed-loop control is formed, and the safety of the whole vehicle and the energy utilization efficiency are improved.

The invention relates to the technical field of electronics, and discloses a power supply method, a readable storage medium, a chip and electronic equipment. The electronic equipment can store the corresponding relation between the voltage parameters of the power supply modules and the phase cutting current thresholds corresponding to different power supply groups. In the operation process of the electronic equipment, the current voltage parameter of the power supply module can be obtained, and the phase cutting current threshold value matched with the current voltage parameter is determined based on the corresponding relation. And then, the electronic equipment can supply power to the load through the power supply group which corresponds to the current output current and has the highest power supply efficiency according to the relationship between the current output current of the display screen power supply module and each determined phase cutting current threshold value. Therefore, since the phase cutting current threshold is matched with the current input voltage and the current output voltage of the power supply module, the power supply module can work under the condition of a power supply phase number with relatively high efficiency, so that the power supply efficiency of the power supply module for the load is improved, and the power consumption of the electronic equipment is reduced.

The invention relates to the technical field of direct-current power transmission systems, in particular to an offshore wind power direct-current line differential protection method, device and system. The method comprises the following steps: respectively acquiring a first target current and a second target current at two ends of a direct-current submarine cable, and acquiring a direct-current voltage absolute value and a target voltage setting value at one end of the direct-current submarine cable; determining a current threshold value according to the first target current, the second target current and a preset protection threshold value; calculating a difference value between the first target current and the second target current; when the absolute value of the difference value is larger than the current threshold value, first delay time is calculated; when the absolute value of the direct-current voltage is larger than the target voltage setting value, second delay time is calculated; when the first delay time reaches the first preset time and the second delay time reaches the second preset time, differential protection is started, and the problem that an existing direct-current submarine cable differential protection method is low in reliability is solved.

A method for charging a rechargeable energy store with a charging current, wherein the energy store has at least one cell block having a number J of series-connected battery cells of which at least some having different capacitances Cn, where 1≤n≤J. Firstly, all J battery cells are charged with a charging current Io until a battery cell i reaches an end-of-charging voltage Ui,L that is specified for said battery cell i. Then, for all battery cells, the charging current is reduced to a value h. If the reduced charging current is less than a charging current threshold value, the charging current is shut off for all battery cells, and the battery cell m having the lowest cell voltage Umin and the battery cell I having the highest cell voltage Umax are determined.

The invention relates to the technical field of motor control, and discloses a chip mounter Z-axis linear motor module end-process force control method, a driver, a medium and a method, and the method comprises the following steps: S1, after a preset end-process position is reached, motor control is switched from position loop control to speed loop control, so that a motor keeps uniform motion; s2, monitoring whether a real-time current value fed back by the motor reaches a threshold current Iset1 or not and maintaining the real-time current value for a preset time length; s3, if the real-time current value reaches Iset1 and is maintained for a preset time length, continuously monitoring whether the real-time current value reaches a threshold current Iset2 and is maintained for a preset time length; and S4, if the real-time current value reaches Iset2 and is maintained for a preset time length, judging that collision occurs. According to the scheme, the speed ring is adopted to control the motor to move at a constant speed to carry out precise force control, meanwhile, the dynamic current threshold value is set to carry out two times of collision detection, collision detection is achieved while force control is carried out, a sensor does not need to be additionally used, and the requirements for mounting precision and compact structure are met.

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 relates to the technical field of electric leakage protection, and particularly discloses a self-adaptive intelligent electric leakage protection system, which comprises a real-time monitoring module used for monitoring electric leakage current magnitude data of any one electric leakage accident of electric equipment in real time, by comparing the electric leakage current magnitude of any one electric leakage accident of the electric equipment with the preset electric leakage current magnitude threshold value, the electric leakage risk of the current electric leakage accident can be analyzed to realize electric leakage protection, and then the electric leakage current magnitude change condition in historical monitoring of the electric equipment is combined; and analyzing the risk level of the future electric leakage accident of the electric equipment based on the electric leakage current magnitude data of the current electric leakage accident, namely estimating the risk level of the future electric leakage accident of the electric equipment, thereby realizing early warning of high-risk electric leakage, and optimizing the circuit electric leakage protection method based on electric leakage early warning. And the situation that the leakage current greatly exceeds the leakage protection threshold value in the future can be avoided.