1129results about "Emergency protection detection" patented technology

The invention relates to the technical field of power distribution protection cabinet fault diagnosis, and discloses an intelligent fault diagnosis and rapid isolation method for a power distribution protection cabinet, and the method comprises the steps: synchronously collecting electrical parameters, environment states and equipment motion signals in the cabinet as multi-source monitoring data when the power distribution protection cabinet operates; parameter fluctuation, state change and action time sequence features are extracted after preprocessing, cross-data association analysis is carried out through a multi-dimensional association model to generate an association feature set, a fault diagnosis information set is formed based on the identified abnormal types, fault positions and development trends, an isolation strategy is formulated according to severity levels and influence ranges, and a fault diagnosis result is obtained. And generating a rapid isolation instruction and dynamically adjusting along with fault evolution. According to the method, multi-source data fusion analysis is realized, faults can be accurately diagnosed and rapidly isolated, the operation safety and reliability of the power distribution protection cabinet are improved, and the method is suitable for fault processing of the power distribution protection cabinet in a power system.

The invention discloses a primary and secondary fusion pole-mounted intelligent circuit breaker. The primary and secondary fusion pole-mounted intelligent circuit breaker comprises a fault detection module, a protection action module, a reclosing module and an information reporting module, the fault detection module collects multi-dimensional electrical quantity through a current transformer and a voltage transformer, and judges a fault and identifies the type in combination with a dynamic normal range and a duration threshold. The protection action module calculates the fault distance based on the correction impedance, judges whether to act or not by combining the current flow direction and the protection range, and selects a protection level according to the fault severity; the reclosing module dynamically sets an observation time window, distinguishes instantaneous or permanent faults through a retest verification mechanism, and adaptively adjusts a reclosing strategy; and the information reporting module uploads fault related information. According to the method, the problems of high misjudgment rate, poor protection selectivity, rigid reclosing logic and the like of a traditional circuit breaker are solved, and the accuracy, quickness and self-healing capability of power distribution network fault processing are remarkably improved.

The invention provides an intelligent socket control system and method based on an overvoltage and undervoltage protector, and relates to the technical field of intelligent socket control. Load bias utility of an intelligent socket under different working conditions is extracted, load attribute identification is performed on voltage state information, and a load identification tag of a load side in an intelligent socket access circuit is generated; determining a voltage out-of-limit level of the voltage at the front end of the intelligent socket in an overvoltage and undervoltage state; after the dissimilatory breaking criterion is executed to cut off a load power supply loop, a reset response strategy corresponding to the voltage at the front end of the intelligent socket is generated, and then a tolerance adaptation rule of the voltage at the front end of the intelligent socket when the overvoltage and undervoltage fault is removed is determined; and performing adaptive resetting on the power supply planning table of the power supply state in the current intelligent socket access circuit according to the voltage out-of-limit level and the tolerance adaptation rule. According to the invention, differentiated adaptive control can be carried out on load power supply under the activation of an overvoltage and undervoltage protection mechanism, so that the adaptability of the intelligent socket to complex working conditions is improved.

The invention discloses a reclosing coordination control method and system based on electrical parameter measurement, particularly relates to the technical field of intelligent power grid fault processing and security defense, and is used for solving the problem that the reliability of fault judgment is reduced due to the fact that high-proportion distributed photovoltaic is connected to a power distribution network. A harmonic detection signal is injected during a reclosing waiting period, a response signal is measured, harmonic subspace energy distribution is extracted, an energy distribution matrix is constructed to calculate a nuclear norm change rate and form similarity, a system harmonic impedance stable state is judged through double verification, and finally a reclosing decision is executed according to a fault judgment parameter. The method can accurately identify the convergence characteristic of the dynamic process of the system, effectively distinguish the instantaneous fault from the permanent fault, and significantly improve the reclosing success rate and the power supply reliability of the distributed photovoltaic power distribution network.

The invention discloses an insulation fault edge self-healing method and device for a power conversion system, and belongs to the technical field of fault diagnosis and automatic maintenance of power electronic equipment, and the method comprises the steps: obtaining multi-modal sensing data, synchronously collected by a multi-modal sensor array, of the power conversion system; a preset lightweight CNN-Transform hybrid model is used to process the multi-modal sensing data, and a feature vector of each modal is obtained; fusing each modal feature vector by adopting a dynamic weight attention mechanism to obtain a fused fault feature vector; classifying the fused fault feature vectors based on a fault classifier, and determining a fault level; and according to the determined fault level, sending a corresponding control instruction to an execution mechanism, and triggering a hierarchical self-healing action. According to the invention, fault identification and self-healing decision can be rapidly completed, and the accuracy of fault detection is effectively improved.

The invention provides a control method and system for an energy storage PCS with an AC / DC circuit breaker and a storage medium, and the method comprises the steps: firstly, synchronously collecting the electrical parameters of a DC side and an AC side, and carrying out the preprocessing of the collected data, so as to form a standardized electrical matrix; then, all parameters in the electrical matrix are cyclically compared with corresponding early warning thresholds, first-level thresholds, second-level thresholds and fusing thresholds in a multi-level threshold mapping table; if the pre-warning threshold value is exceeded, a log is recorded, if the pre-warning threshold value is exceeded, self-healing operation is executed, if the pre-warning threshold value is exceeded, turn-off operation is executed, and if the pre-warning threshold value is reached, physical fusing is triggered; meanwhile, all operation logs are recorded, and the threshold mapping table is dynamically optimized by analyzing log data; according to the method, the fault response speed and the protection precision are improved through multi-level threshold serial comparison and a cooperative protection mechanism, the stability and the reliability under different working conditions are enhanced through the adaptive learning capability, and meanwhile, the whole life cycle cost is reduced.

The invention provides an input voltage anomaly detection method, a protection method and a control circuit. The control circuit comprises a voltage-current conversion circuit, the input end of which is coupled with the power switch for obtaining the terminal voltage of the power switch; the first capacitor is coupled to the output end of the voltage-current conversion circuit; the comparison circuit is used for comparing the first capacitor voltage with a reference signal and providing an input voltage anomaly detection signal; and a switch control circuit which controls the power switch based on the output of the comparison circuit and starts input voltage abnormality protection when the input voltage abnormality detection signal is valid. The control circuit provided by the invention can realize the anomaly detection of the input voltage based on the terminal voltage of the power switch, can reduce the use of pins, simplifies a peripheral circuit, reduces the system cost, and accelerates the protection response speed.

The invention relates to the field of display, and discloses a short-circuit protection circuit, an array substrate, a display device and a short-circuit protection method.The short-circuit protection circuit is used for an OLED device and comprises the steps that an information sensing module obtains the actual working current of the OLED device and real-time parameters related to the working state of the OLED device; the dynamic expectation calculation module calculates the dynamic expectation working current n of the OLED device according to the real-time parameters and a preset OLED electrical characteristic model; the decision module synthesizes the actual current, the expected current and the current change rate / fluctuation amplitude to generate a risk judgment signal; and the response control module executes protection operation according to the judgment signal. According to the OLED short-circuit protection method, the accuracy, the sensitivity and the intelligent management level of OLED short-circuit protection are remarkably improved through the technology of dynamically calculating the expected current and carrying out decision making and parameter self-adaptive adjustment by fusing the actual current time sequence characteristics.

The invention relates to the technical field of circuit breaker control, in particular to a control system and method for an intelligent circuit breaker controller, and the system comprises a data collection module, an abnormality judgment module, an abnormality determination module, a type determination module, an adjustment module and an execution module. According to the invention, the current, the contact displacement and the contact temperature are collected in real time, so that the operation state of the circuit breaker can be sensed in a multi-dimensional manner; in the hidden anomaly judgment, anomaly candidate generation and type identification process, the synchronous change trend of displacement and temperature is compared with historical anomaly characteristics, and a trigger amplitude threshold value and a delay tripping window are adjusted based on the anomaly type and the confidence coefficient; and furthermore, the peak amplitude threshold value is adjusted or the tripping action is executed according to the time distribution of the implicit anomaly judgment result in the preset correction duration, so that the problem of insufficient early warning capability caused by lack of a refined state recognition and prediction mechanism is effectively solved.

An electro-static discharge (ESD) protection circuit includes an ESD current discharge circuit including a first transistor, a second transistor, and a third transistor, connected in series and connected between a pad and a ground voltage, an ESD detection circuit configured to turn on the third transistor when the ESD event occurs, and a bias generation circuit configured to provide a bias voltage for turning on the first transistor to a gate of the first transistor when the ESD event occurs.

The invention discloses a control method for under-voltage tripping and voltage detection closing for a low-voltage switch, and relates to the technical field of power distribution automation. The problems of function separation, low detection precision, poor anti-interference capability and inconvenient maintenance in the prior art are solved. The method comprises the following steps: S1, acquiring a high-precision digital voltage through a voltage transformer, a voltage division network, an isolation amplifier and a 24-bit delta sigma ADC; s2, interference is suppressed by combining temperature compensation, FIR filtering, median filtering and an oversampling integration algorithm; s3, comparing the real-time voltage with a tripping / closing threshold value which can be configured online in parallel; s4 / S5, triggering a zero-crossing short pulse to drive opening / closing based on the threshold value and the time delay; s6, performing parallel fault monitoring, shielding misoperation and uploading fault data; according to the invention, the detection precision, the anti-interference capability and the operation and maintenance efficiency of the system are obviously improved.

The invention provides a primary resonance elimination device of a power distribution network voltage transformer and a management and control method, and relates to the technical field of voltage transformer resonance elimination. The primary resonance elimination device comprises a primary resonance elimination resistor, a primary resonance elimination power electronic device, a standby resonance elimination resistor and a standby resonance elimination power electronic device; the primary resonance elimination resistor and the primary resonance elimination power electronic device are connected in series and then are connected in series between a neutral point of the power distribution network voltage transformer and a ground wire; the standby resonance elimination resistor and the standby resonance elimination power electronic device are connected in series, one end of the standby resonance elimination resistor and the standby resonance elimination power electronic device which are connected in series is connected with a neutral point of the power distribution network voltage transformer, and the other end is grounded; the primary resonance elimination device further comprises a current transformer and a temperature sensor; the temperature sensor is used for monitoring the temperature values of the primary resonance elimination resistor and the standby resonance elimination resistor; the current transformer is assembled on a line where the primary resonance elimination resistor and the standby resonance elimination resistor are grounded together and used for monitoring the value of current flowing through the primary resonance elimination device.

A thermosensitive wire includes a pair of conductive wires each covered with an insulator that softens at a preset temperature, and the pair of conductive wires are configured to come into contact with each other to be short-circuited in response to the insulator softening. A power supply system includes: a second power source configured to supply power to the pair of conductive wires; a short circuit detector configured to detect that the pair of conductive wires are short-circuited; a disconnection detector configured to detect that the pair of conductive wires are disconnected; and a controller configured to perform, for power supply to a power supply wire, abnormality control that differs between in the case where the short circuit detector detects that the pair of conductive wires are short-circuited and in the case where the disconnection detector detects that the pair of conductive wires are disconnected.

The invention relates to the technical field of power distribution network fault positioning, in particular to a power distribution network fault self-healing method based on fault detection positioning and isolation recovery. Comprising the steps of collecting data; judging that a fault occurs, and judging a fault type based on a wavelet transform method; screening candidate fault branches based on a matrix method, and obtaining fault distances of the candidate fault branches based on a traveling wave distance measurement method; on the basis of topological connection of candidate fault branches, a minimum set of switches needing to be disconnected is generated, the minimum power failure range is calculated, and the isolation priority is dynamically adjusted; and constructing a physical constraint of recovery operation and a multi-objective function of power supply recovery, solving the multi-objective function of power supply recovery, obtaining an interconnection switch state, a section switch state and a distributed power supply output adjustment instruction, and executing a power supply recovery action. According to the method, the strategy transparency and the operation and maintenance efficiency are improved, the problem of positioning failure of a traditional method under noise interference and multi-branch scenes is solved, and the fault positioning precision is improved.

The invention discloses a direct current motor control and automatic detection system and method, the system comprises an upper computer, a lower computer and a CAN bus communication unit, the upper computer comprises a calibration module, a position control module, a self-inspection module and a communication interface, and the calibration module is used for initiating an automatic calibration instruction and receiving and displaying a calibration result; the position control module is used for generating a target position instruction and receiving and dynamically displaying the real-time position of the motor; the self-checking module is used for initiating a one-key self-checking instruction and displaying a self-checking result; the lower computer comprises a main control chip, the main control chip is provided with an H-bridge driving circuit and an encoder acquisition circuit, the H-bridge driving circuit is used for driving the direct current motor to rotate forwards and backwards, and the encoder acquisition circuit is used for acquiring motor position signals; the CAN bus communication unit is connected with the communication interface of the upper computer and the main control chip of the lower computer through the USB to CAN module; according to the invention, faults can be automatically detected in the production and use processes of the DC motor, and the efficiency of production personnel and the product quality are improved.

The invention provides a circuit breaker fault arc pre-detection control method and system, and relates to the technical field of circuit breaker fault arc pre-detection control. Circuit breaker main loop current signals, frequency conversion equipment operation state information, production line load level information and production scheduling plan information are collected; a noise risk index and a potential fault risk index are introduced, an electrical signal alarm threshold value is dynamically adjusted according to the two risk indexes, high-frequency characteristics of a circuit breaker main loop current signal are extracted and compared with the dynamically-adjusted threshold value, and a total risk assessment and grading early warning mechanism is combined. According to the method, early warning information with different risk levels is generated, corresponding control intervention measures are taken, the defect that in the prior art, it is difficult to accurately recognize the early fault arc of the circuit breaker in a complex industrial environment is overcome, and the accuracy and reliability of fault pre-detection are remarkably improved.

The invention discloses a load current fault diagnosis and protection system, and relates to the technical field of power electronic equipment fault diagnosis, a current data acquisition module is used for acquiring a real-time current sampling value and a current sampling timestamp of load equipment, and synchronously acquiring operation condition parameters of the load equipment; and the current anomaly index calculation module is used for calculating a current fluctuation anomaly index and a working condition adaptation anomaly index according to the real-time current sampling value, the current sampling timestamp and the operation working condition parameters, and superposing the current fluctuation anomaly index and the working condition adaptation anomaly index to obtain a comprehensive current anomaly index. According to the method, the current data and the working condition parameters are synchronously collected, the multi-dimensional abnormal indexes (current fluctuation and working condition adaptation) are constructed, the problems of misjudgment and missed judgment of traditional single threshold value diagnosis are solved, the current abnormal degree can be accurately quantified by integrating the current abnormal indexes, and a scientific basis is provided for fault recognition.

The invention relates to the technical field of bus duct thermal protection, in particular to a bus duct thermal protection method and system based on intelligent monitoring, and the method comprises the steps: obtaining a packet loss delay bandwidth generation state label, calling an unstable link collection path node congestion rate port number to generate a scheduling table, collecting a temperature rise rate displacement, calculating a thermal slope and combining field disturbance to obtain a trigger value, and comparing thermal triggering with thermal accumulation to identify a high-temperature-sensitive section mark, and calling the mark to compare a cutoff threshold value to generate a starting result. By collecting multi-dimensional data such as packet loss, delay and bandwidth for dynamic analysis, the state of a communication link can be evaluated in real time, an unstable link can be found, an accurate triggering boundary value is generated by combining parameters such as thermal load, electric field intensity and harmonic waves, cooling or power-off protection is started in time by matching with a heat flow trend before a high-temperature-sensitive area appears, and the reliability of the system is improved. Response lag of a traditional technology is avoided, an intelligent response mechanism is innovated to achieve accurate and flexible thermal protection, stable and safe operation of equipment is guaranteed, and overheating accidents are reduced.

The invention provides a method and device for increasing the rated current breaking frequency of a direct-current solid-state circuit breaker and application of the method and device, and aims to solve the problem that the breaking frequency of an existing direct-current solid-state circuit breaker is limited due to over-temperature damage caused by performance degradation after multiple current impacts of a piezoresistor and difficult measurement of the junction temperature of a power device. The system comprises a junction temperature prediction module based on a physical information neural network, an auxiliary energy absorption module and a power device voltage clamping module. The junction temperature prediction module is used for accurately predicting the junction temperature of the power device in real time by fusing a physical thermal model and a neural network; the voltage clamping module suppresses turn-off overvoltage; and the auxiliary energy absorption module is started when the junction temperature is close to the limit to absorb residual energy. According to the design, turn-off energy is reasonably distributed, the impact frequency and strength of the piezoresistor are reduced, the service life of the piezoresistor is remarkably prolonged (for example, the service life is prolonged by about 10 times under the impact of 200A), then the rated breaking frequency of the solid-state circuit breaker is greatly increased, and the solid-state circuit breaker is low in cost, high in reliability and suitable for scenes such as a direct-current power grid.

The invention relates to the technical field of power fault detection, and mainly relates to a residual voltage detection circuit and a line protection device.The residual voltage detection circuit comprises a sampling circuit and a signal holding circuit, the signal holding circuit adopts double coils and comprises a first coil and a second coil, and a loop where the first coil is located is provided with a first controllable switch tube in series; the first controllable switch tube is connected when the sampling circuit collects residual voltage, a second controllable switch tube is arranged in a loop where the second coil is located in series, the control end of the second controllable switch tube is used for being connected with a feeder terminal, and the signal holding circuit further comprises a residual voltage output branch used for being connected with the feeder terminal. The residual voltage output branch is provided with a first contact of the double coils in series. A sampling circuit is used for obtaining a residual voltage signal generated at the moment of closing of a faulty power grid line, and a signal holding circuit formed by double coils is used for transmitting a sampling signal to a feeder terminal, so that the feeder terminal can still receive the residual voltage signal when the feeder terminal loses power after power supply is recovered.

Systems, methods, and apparatuses can detect whether an electrical cable between a source device and a sink device has become disconnected. The source device and / or the sink device can be compliant with a version of a Universal Serial Bus (USB) standard, for example, USB 3.x. These systems, methods, and apparatuses can monitor peak voltage swings of data signals flowing between the source device and the sink device. The peak voltage swing of these data signals can be at a first value when the electrical cable is connected to the source device and the sink device or at a second value greater than the first value when the electrical cable is disconnected from the source device or the sink device. The peak voltage swing can switch from the first value to the second value in response to the electrical cable being disconnected from the source device or the sink device. As such, these systems, methods, and apparatuses can determine that the electrical cable has become disconnected from the source device or the sink device in response to detecting the second value for the peak voltage swing of the data signals flowing from the source device to the sink device.

The invention discloses a grounding resistance thermal-electric coupling prediction method and system suitable for various soil scenes. The method comprises the following steps: acquiring an electrode parameter, a soil parameter, a grounding fault parameter and initial temperatures of an electrode and soil; calculating an electrode current and a soil leakage current of the time step based on the electrode and soil resistivity of the time step; based on the electrode current and the soil leakage current of the time step, calculating the electrode temperature, the soil radial temperature distribution and the grounding potential rise of the time step by adopting a finite difference method; based on the electrode temperature and soil radial temperature distribution of the time step, updating the electrode resistivity and the soil resistivity of the time step + 1; if the end of the fault time is not reached, returning to continuously calculate the temperature of the electrode and the soil at the time step + 1; otherwise, outputting the electrode temperature and soil radial temperature distribution of each time step. According to the invention, thermal-electric dynamic coupling is considered, and accurate evaluation of the performance of the grounding system is realized.

The invention discloses an insulation fault detection method, an inverter and a photovoltaic system, and the method comprises the steps: detecting an MPPT unit with an insulation fault, controlling the switching tube of the MPPT unit with the insulation fault to be switched off, and controlling the switching tubes of other normal MPPT units to be switched on; and a turn-off device corresponding to the MPPT unit with the insulation fault is controlled, so that the m photovoltaic strings corresponding to the MPPT unit with the insulation fault independently charge the direct current bus capacitor in sequence, and the photovoltaic string with the insulation fault is detected. According to the invention, the photovoltaic string with the insulation fault can be accurately positioned, and the manpower, time and economic cost for manually checking the position of the fault string for the second time can be saved.

A three-phase adaptive reclosing method and system for wind farm transmission lines based on parallel reactor current is provided. When a phase to phase or three-phase fault occurs in the transmission line, the circuit breakers at both ends trip. The current transformer is used to sample the three-phase current signal of the parallel reactor, calculate the differential mode current of the parallel reactor, and perform zero crossing detection to construct a fault nature identification criterion. The fault nature is determined within the maximum discrimination time limit combined with the sliding time window. For permanent faults, the reclosing device is locked; for transient faults, calculate the time when the fault disappears and determine the reclosing time, and open the reclosing device. The method and system identifies the nature of faults by detecting whether the differential current of parallel reactors crosses the zero axis, with low sampling rate requirements, and small errors.

The utility model, which relates to the technical field of the LED, discloses a leakage protection circuit comprising a power supply circuit, a step-down circuit, an LED circuit and a detection circuit. The input end of the power supply circuit is connected to the output pin of the power supply end, the output end of the power supply circuit is connected with the input end of the step-down circuit and the input end of the LED circuit, and the power supply circuit is used for rectifying the output power supply of the power supply end so as to output the power supply to the step-down circuit and the LED circuit; the output end of the step-down circuit is connected with the detection circuit, and the step-down circuit is used for carrying out step-down processing on the power supply output by the power circuit to output reference voltage to the detection circuit; and the detection circuit is respectively connected with the output pins of the power supply end and the LED circuit, and is used for controlling the working state of the LED circuit according to the real-time voltage difference and the real-time voltage between the output pins of the power supply end and the reference voltage output by the step-down circuit. According to the utility model, the working state of the LED circuit can be controlled according to the real-time voltage difference, the real-time voltage and the reference voltage, thereby realizing anti-creeping protection.

The invention relates to the technical field of circuit breakers, and provides a self-adaptive overcurrent protection method and system for an explosion-proof circuit breaker. The method comprises the following steps: determining electrical equipment connected with an explosion-proof circuit breaker bus; carrying out load type judgment, analyzing current waveform dynamic characteristics according to the type, and constructing an overcurrent threshold mapping decision relation; collecting current environment data, analyzing the influence of the current environment data on the current bearing capacity, and generating a current bearing capacity decline index; and optimizing an over-current threshold mapping decision relation in real time according to the index, and performing over-current monitoring and protection action triggering on the bus according to the optimized mapping decision relation. The technical problems that the overcurrent setting value of a traditional explosion-proof circuit breaker is fixed, and different load working conditions and environment derating cannot be considered at the same time, so that the protection accuracy and adaptability are insufficient are solved, the overcurrent threshold value is adaptively set in real time according to the load pulse characteristic and the environment current bearing capacity, and the protection accuracy and adaptability are improved. And the over-current protection accuracy and adaptability of the explosion-proof circuit breaker are improved.

The invention relates to the technical field of relay protection, in particular to a method for identifying excitation surge current of a transformer sent out by a wind power plant based on differential current waveform characteristics and application of the method. Compared with a traditional second harmonic braking method, the method has the advantages that the time window is short, the magnetizing inrush current of the transformer can be quickly identified, and the protection reliability of the sending-out transformer of the wind power plant is improved. The objective of the invention is to solve the problem of how to reliably identify the magnetizing inrush current fault of the wind power plant transformer.

The embodiment of the invention discloses a potential risk detection and service life prediction method and device for an outdoor battery and a medium. A specific embodiment of the method comprises the following steps: acquiring relaxation voltage curve information, impedance spectrum information, lithium dendrite growth thickness information and battery internal temperature information of a preset battery in an outdoor low-temperature environment; generating battery potential risk detection information; in response to determining that risk detection information representing the risk of ion conduction fracture caused by solidification of the preset battery exists in the battery potential risk detection information, carrying out preheating protection treatment on the preset battery; in response to determining that risk detection information representing the risk that lithium dendrites pierce the diaphragm in the preset battery exists in the battery potential risk detection information, carrying out load cutting protection treatment on the preset battery; generating battery service life prediction information; and carrying out battery replacement early warning processing. According to the embodiment, the use stability and the use safety of the battery are improved.

A residual current device is configured for connection to a power supply network having at least two power supply conductors and includes a switching device for interrupting the at least two power supply conductors, a sensor for detecting residual currents in the at least two power supply conductors, and a control circuit which is designed to detect a residual current between the at least two power supply conductors using the sensor and, when a residual current is detected, to control the switching device to carry out a switching operation.

The invention relates to the technical field of electric energy metering protection, and discloses an anti-creeping protection system based on an embedded electric energy metering box. A data acquisition module of the system acquires real-time electric energy parameter data and historical electric leakage event data of an electric energy metering box; the model training module trains an artificial intelligence detection model based on the collected data; the electric leakage detection module performs real-time electric leakage detection by using the trained model; the event analysis module performs feature extraction and constraint analysis on the detected electric leakage event; the risk prediction module predicts the future electric leakage risk according to the analysis result; the optimization module continuously optimizes and iterates the artificial intelligence detection model according to the prediction result; and the protection execution module executes a leakage protection action based on the optimization model after model optimization. According to the system, through cooperative work of multiple modules, accurate detection, deep analysis, risk prediction and intelligent protection of electric energy metering box electric leakage faults are realized, the reliability and the intelligent level of electric leakage protection are effectively improved, and potential safety hazards are reduced.