97 results about "Transmission tower" patented technology

The present application relates to power transmission channel monitoring technical field, specifically provide a kind of power transmission channel topographic risk assessment method and device, comprising: based on the single view complex image of ascending track and descending track SAR satellite covering power transmission channel area determines the gradient observed by satellite in ascending track and descending track direction;Extract the slope angle matrix and slope direction angle matrix of pixel point in digital elevation model covering power transmission channel area, and construct the projection matrix that will be mapped to radar line-of-sight direction under the motion of topographic coordinate system based on the slope angle matrix and slope direction angle matrix;Based on the gradient observed by satellite in ascending track and descending track direction and the projection matrix, determine the soil along slope sliding gradient and soil vertical settlement gradient covering the power transmission channel area;Based on the soil along slope sliding gradient and soil vertical settlement gradient covering the power transmission channel area, power transmission channel topographic risk assessment is carried out.The technical scheme provided by the present application can realize the fine classification of power transmission tower foundation risk.

The utility model relates to transmission tower bolt loosening detection technical field, proposes a kind of non-contact transmission tower bolt loosening detection device, including physical isolation shield, acoustic detection module in being arranged in physical isolation shield, unmanned aerial vehicle hanger being rotatably connected with physical isolation shield, transmission line;Acoustic detection module is used to collect the sound signal generated by transmission tower bolt loosening, and transmission is given unmanned aerial vehicle;Unmanned aerial vehicle hanger includes: connecting support, damping component, connecting seat, angle adjusting device;Angle adjusting device is used to adjust the direction of acoustic detection module, so that acoustic detection module can be aligned with transmission tower bolt of different position and angle;Physical isolation shield includes insulating shield layer and metal shielding layer, and metal shielding layer is placed between two layers of insulating shield layer.Metal shielding layer can effectively shield external electromagnetic interference.Realized long-distance, high-precision, anti-interference transmission tower bolt loosening detection.

This invention relates to a three-dimensional imaging device for the pipe wall of a transmission tower base and a method for assessing its corrosion status, belonging to the field of non-destructive testing technology. The method includes: S1: Rotating the ultrasonic array probe in the three-dimensional imaging device horizontally around the tower base to obtain the longitudinal thickness information of the pipe wall; S2: Constructing the external contour of the pipe wall based on the angle information and horizontal radial data of the ultrasonic array probe; S3: Constructing the internal contour of the pipe wall based on the angle information and pipe wall thickness information of the ultrasonic array probe, combined with the external contour information; S4: Confirming suspected corrosion points in the internal contour of the pipe wall using multi-angle acoustic beams; S5: Constructing a three-dimensional imaging result of the tower pipe wall based on the obtained internal and external contours; or assessing the mechanical strength of the pipe wall and the degree of corrosion of the inner pipe wall based on the three-dimensional imaging result. This invention breaks through the traditional detection dimensions, achieving high-precision, high-definition, and visualized three-dimensional refined assessment.

This invention discloses an easily replaceable lightning protection device for transmission towers in the field of lightning rod maintenance. The device includes a support assembly, the lower part of which is provided with a base, to which several fixing rings are connected, to which a lifting rod is fixedly connected; and a removal assembly, which includes a lightning connection base slidably connected to the lifting rod, to which a lightning rod is fixedly connected. The base is provided with a drive motor for driving the lightning connection base to slide up and down along the lifting rod. The beneficial effects of this invention are as follows: By driving the lightning connection base with the drive motor to slide up and down along the lifting rod, rapid replacement of the lightning rod can be achieved, improving inspection and repair efficiency while reducing safety hazards.

The application discloses a kind of based on ZYNQ platform's transmission tower steel member weld surface defect detection system and method, belong to industrial vision detection and embedded intelligent identification technical field.Pass through acquisition weld image and construct defect dataset, in YOLOV3 target detection network training stage introduction self-adapting residual network structure and channel attention mechanism, enhance shallow layer detail information transmission and defect relevant feature response, realize to crack, pore, slag inclusion, undercut and weld tumor and so on Defect Effective identification.Training optimized model faces ZYNQ heterogeneous hardware and is deployed, through hierarchical data access, convolution unit reuse, multi-level parallel computing and pipeline processing, reduce data movement overhead, improve convolution operation efficiency and on-chip resource utilization, reduce the hardware scale required for edge deployment, to improve the real-time performance and engineering application capability of weld surface defect detection.

This invention discloses a method and system for assessing the grounding resistance status of transmission towers, relating to the field of grounding measurement technology for transmission towers. The method includes: acquiring a grounding impedance characteristic sequence and a three-dimensional environmental characteristic sequence; calculating the comprehensive environmental influence intensity index for each cycle; calculating the response lag coefficient for the current cycle; calculating the dominant weight index of environmental effects for the current cycle; constructing and training two types of hidden Markov models, independent and joint, to obtain the independent observation probability and joint observation probability of each hidden state in the current cycle; based on the independent and joint observation probabilities, obtaining the corrected observation probability of each hidden state in the current cycle; based on the corrected observation probabilities, calculating the confidence level of each hidden state in the current cycle, and determining the grounding resistance status for the current cycle. This invention can dynamically distinguish between normal current dissipation capacity fluctuations caused by the environment and real anomalies caused by equipment degradation, improving the accuracy of grounding status assessment.

This invention discloses a bolt loosening location method and system based on environmental vibration and multi-scale PNN. The location method includes the following steps: S1: Establishing a refined finite element simulation model of the transmission tower and dividing it into multi-scale hierarchical substructures; S2: Simulating bolt loosening conditions in the finite element simulation model and extracting operational modal analysis results; S3: Calculating the frequency change ratio and modal compliance residual matrix norm, and constructing a multi-source damage-sensitive feature vector after weighted fusion; S4: Constructing and training a probabilistic neural network with an adaptive smoothing factor adjustment mechanism; S5: Acquiring on-site environmental vibration data and identifying modal parameters; S6: Extracting and calculating the measured data of the tower using the random subspace identification method, and inputting it into the trained probabilistic neural network to obtain the location results of the main bolt loosening area. This method achieves accurate bolt loosening location through scientific substructure division and multi-source fusion strategies, providing a reference for the safe operation and maintenance of tower bolts.

The present invention provides a method and system for quantitatively describing wind speed profiles at various locations in mountainous areas, determining wind speed, and including: performing flow field simulation analysis based on a rigid boundary model of the mountain to determine the dominant wind direction and wind speed sequence at the wind speed profile data extraction points; determining the wind speed profile type and corresponding wind speed profile objective function based on the relative positional relationship between the active wind direction and the selected points in the mountain; fitting the corresponding wind speed sequence and wind speed profile objective function according to each wind speed profile type to obtain the parameters in the wind speed profile objective function, thereby determining the calculation formula for each wind speed profile type; and then using the wind speed profile type calculation formula corresponding to the wind speed profile type to calculate the wind load at any point on the transmission tower. The purpose is to establish a system that can accurately reflect the influence of complex mountainous terrain changes on the wind speed distribution along the height, accurately calculate the wind load on the tower, and thus improve the safety and economy of transmission towers under complex mountainous conditions.

The application discloses a kind of fixed camera-based power transmission network clamp loosening monitoring system and method, wherein the method includes: obtaining the sequence image data of power transmission clamp and cable containing high-contrast visual characteristic mark layer sprayed, which is collected by an image acquisition device deployed on a power transmission tower;Determine whether the quality parameter of the sequence image data is lower than a preset quality threshold according to the quality parameter;If the determination result is no, then the target detection algorithm is used to process the sequence image data to identify and locate the power transmission clamp and the cable, and obtain its position information in continuous image frames, etc.The application installs a camera on the power transmission tower, and sprays weather-resistant color marks on the clamp and cable, analyzes the small displacement or shaking of the clamp and cable using computer vision technology, realizes real-time monitoring and sends alarm information to the management personnel.

This invention discloses a 420KN round-head sandblasted suspension insulator, relating to the field of suspension insulator technology. To improve the stability, pollution resistance, mechanical load-bearing reliability, ease of installation and maintenance, and impact resistance of the sandblasted layer of the round-head sandblasted suspension insulator, it specifically includes a porcelain body, a round-head connecting assembly, a skirt assembly, and an anti-detachment sandblasting structure. The porcelain body is a columnar structure with a round head integrally formed at the top. The round-head connecting assembly is fixedly installed on the top of the round head for connection with transmission towers or adjacent insulators. The skirt assemblies are spaced apart along the axial direction of the porcelain body. The anti-detachment sandblasting structure covers the outer surface of the round head and the outer surface of the skirt assembly. This invention effectively solves the problems of easy detachment and cracking of existing sandblasted layers. Simultaneously, the protective surface layer improves the weather resistance and corrosion resistance of the sandblasted layer, extends its service life, and thus ensures the long-term stable pollution resistance and insulation performance of the insulator, making it suitable for use in particularly harsh environments.

This invention discloses a method for obtaining the wind-induced vulnerability curve of transmission towers based on failure probability, relating to structural engineering technology. The method includes the following steps: establishing a probability distribution model of the extreme response of the transmission tower to wind load; constructing a probability distribution model of the structural bearing capacity of the transmission tower; obtaining the failure probability based on vulnerability analysis using Latin hypercube sampling; plotting vulnerability curves with wind speed as the horizontal axis and failure probability as the vertical axis, drawing curves under different failure criteria to obtain vulnerability curves based on failure probability; performing vulnerability analysis in conjunction with engineering estimates to obtain the loss rate; plotting vulnerability curves; and finally, plotting a curve with wind speed as the horizontal axis and loss rate as the vertical axis to obtain vulnerability curves based on engineering estimates. This invention's method is characterized by its high efficiency in analytical calculation and is suitable for analyzing the failure probability and loss rate of transmission towers in engineering contexts.

The utility model discloses a kind of transmission tower intelligent analyzers with ground net welding point detection function, including transmitter and receiver, the transmitter is used to apply alternating current to ground net ray, one end is connected with ground stake, the other end is connected on ground net ray exposed joint;The receiver includes receiving antenna, signal analysis module, display screen, main control module, button, high-precision RTK and gyroscope. The analyzer has basic grounding resistance detection, soil resistivity detection and concealed ground net detection, real-time display ground net trend, while having the industry first ground net welding point detection function, effectively reduce the loss of manpower and material resources caused by blind excavation ground net. The equipment overall structure is simple, portable, easy to use, powerful, with greater practical value.

This application provides a multi-parameter fiber optic monitoring device for bolt loosening on transmission towers, belonging to the field of bolt loosening monitoring. It aims to solve the problems of existing bolt loosening monitoring schemes, such as susceptibility to strong electromagnetic interference, low integration, inability to cover the entire loosening cycle, and high false alarm rate. This device includes an integrated fiber optic grating-Fabry-Perot cavity sensor head and signal demodulation system, employing a coaxial push rod-mass block integrated linkage structure to achieve synchronous acquisition and mechanical decoupling of bolt axial displacement and triaxial vibration. Through a dual-band optical path architecture of 1310nm O-band and 1550nm C-band, combined with a dual-window wavelength division multiplexer, complete optical decoupling of the two parameters is achieved. It is equipped with dual-link independent wavelength calibration, hardware full-link synchronous triggering, and a dual-parameter mutual verification mechanism. This application is inherently resistant to strong electromagnetic interference and can achieve highly reliable monitoring of bolt loosening throughout its entire lifecycle.

The utility model relates to the technical field of steelwork production and processing, and disclose a kind of transmission tower steelwork hot-dip galvanizing automatic feeding equipment, including support plate subassembly, the middle installation of support plate subassembly has feeding conveying subassembly, and the outer wall fixed mounting of the beginning of support plate subassembly has adjusting brake subassembly, while the bottom fixed mounting of the end of support plate subassembly has angle adjusting subassembly, the front side of angle adjusting subassembly is correspondingly provided with balance bracket subassembly, and balance bracket subassembly is slidably installed at the bottom side of support plate subassembly.The utility model is equipped with height adjusting subassembly on device, can make when using this device, when the conveying work of different height processing device is carried out, corresponding height adjustment can be carried out by the height adjusting subassembly set, and then more extensive work application is realized.

The utility model discloses a bird repelling structure of a high-voltage power transmission tower, which comprises a clamping seat, a locking screw rod, a connecting seat, a rotating seat, a connecting spring, a rotating cap, a cross rod, a roller and a hemispherical block, the connecting seat is positioned at the top of the clamping seat, and a mounting shaft shoulder is arranged at the bottom of the rotating seat; the rotating seat is mounted by matching a mounting shaft shoulder at the bottom with a mounting bearing in a mounting hole in the connecting seat, the bottom end of the connecting spring is fixedly connected with the rotating seat, the top end of the connecting spring is fixedly connected with the rotating cap, the plurality of cross rods are horizontally fixed on the outer side of the rotating cap, and each cross rod is provided with a roller rotating relative to the cross rod; the hemispherical block is vertically arranged at the tail end of the cross rod; the bird repelling structure capable of being installed on the power transmission tower is arranged, the connecting springs, the rollers, the bells and other structures are arranged, so that birds cannot stand at the positions, where the birds easily fall, of the power transmission tower, and meanwhile, the ringtone generated by rotation of the device has a certain repelling effect on the birds, so that the purpose of protecting the power transmission device is achieved.

The utility model discloses adjustable ground wire hook device relates to power transmission line safety appliance technical field, specifically includes double tongue tension type metal hook, male head, female head, insulating operating stick and ground copper wire, and the double tongue tension type metal hook is with male head through first screw fastening connection and constitutes first detachable assembly, and female head is with insulating operating stick through second screw fastening connection and constitutes second detachable assembly, and first detachable assembly is with second detachable assembly through male head and female head realizes detachable connection. The application can set up ground wire in different angles for various types of tower in power transmission line through adding adjustable device between ground wire hook and insulating operating stick, improves the close degree of ground wire setting, the qualified proportion, simultaneously, the function of its adjustment angle can reduce the displacement frequency of high altitude operation personnel on the transmission tower, reduces the operation risk, and protects the safety of operation personnel.

Provided is a monitoring device for the settlement of a transmission tower. The monitoring device includes a laser ranging sensor, an acceleration sensor, a central processing module, a battery, and a fixing plate. The laser ranging sensor is configured to measure the distance between the installation position of the monitoring device and the ground. The acceleration sensor is configured to measure the inclination angle of a tower leg. The central processing module is configured to process measurement data of the laser ranging sensor and the acceleration sensor. The battery is configured to supply power to the laser ranging sensor, the acceleration sensor, and the central processing module. The fixing plate is configured to fix the monitoring device to the tower leg of the transmission tower. A method for monitoring a settlement of a transmission tower is further provided.

The utility model discloses a multi-directional climbing device for a transmission tower, which comprises a multi-directional climbing module and a base. The multi-directional climbing module includes a clamping mechanism, a climbing mechanism and a steering mechanism. Among them, the clamping mechanism and the climbing mechanism are connected through the steering mechanism. The clamping mechanism is used to clamp or loosen the tower during climbing; the climbing mechanism adopts a screw drive mechanism, and transmits the power of the rotating motor to the ball screw through a synchronous pulley assembly, so as to drive the ball screw platform to complete longitudinal movement; the steering mechanism is used to cooperate with the movement of the clamping mechanism during climbing, so that the device can smoothly turn when reaching the cross arm of the tower. The device of the utility model can climb and cross obstacles, is applicable to transmission towers of different structural types including main material angle steel and cross arms, has a strong load capacity, and can carry maintenance equipment to complete maintenance tasks.

The application provides a vulnerability curve model construction method and device of a power transmission tower and electronic equipment, and the method comprises the following steps: obtaining experimental data of a scaled power transmission tower model of the power transmission tower under multiple different landslide impact working conditions; determining the damage level of the scaled power transmission tower model of the power transmission tower under each working condition according to the maximum horizontal displacement of the experimental tower top and a preset damage level table; determining the exceeding damage probability of each type of damage level corresponding to each target actual landslide impact force according to the experimental landslide impact force under each working condition and the damage level under each working condition; and performing nonlinear fitting on each target actual landslide impact force and the exceeding damage probability of each damage level corresponding to each target actual landslide impact force to construct a vulnerability curve model of the power transmission tower in a landslide disaster process. The construction of the vulnerability curve model of the power transmission tower under the landslide disaster process is realized.

The application discloses a kind of based on unmanned aerial vehicle auxiliary transmission line insulating ground wire gap switching device and method;Based on unmanned aerial vehicle auxiliary transmission line insulating ground wire gap switching device includes frame body, fixed contact, movable contact, transmission assembly and traction rope;Frame body is installed at the top of transmission tower, fixed contact is installed in frame body and is connected with transmission line;Transmission assembly is installed in frame body, movable contact is installed in one end of transmission assembly, and movable contact is used to connect overhead ground wire;Transmission assembly is provided with adjusting portion away from one end of movable contact;Transmission line insulating ground wire gap switching method based on unmanned aerial vehicle assistance uses the above device by unmanned aerial vehicle assistance to hang traction rope in adjusting portion, and then ground traction rope is pulled to drive transmission assembly to change the distance of movable contact and fixed contact;Operator does not need to climb tower high-altitude operation, only needs to pull traction rope on ground to change the distance between movable contact and fixed contact, improve safety and operation efficiency.

This application provides a geological disaster safety risk assessment method based on rainfall, landslides, and transmission tower deformation, relating to the field of geological disaster prediction. The method includes: collecting multi-source data in the slope area where the transmission tower is located; constructing a rainfall-induced soil moisture content response model and dynamically correcting the soil shear strength parameters; calculating the landslide stability safety factor based on the corrected soil shear strength parameters; constructing a comprehensive deformation index for the transmission tower; obtaining a rainfall risk index; and combining the landslide stability safety factor and the comprehensive deformation index of the transmission tower to construct a comprehensive risk assessment model, outputting the risk level and early warning signal. This application constructs a dynamically coupled risk assessment model of the three elements of "rainfall-slope-tower," realizing a comprehensive analysis from meteorological disaster to structural response.

This utility model discloses a vertical clamp for angle steel used in ultra-high voltage transmission towers, including a core plate extending from the end of the core plate facing the center of the press. Side plates are detachably fixed to both ends of the core plate, and each side plate extends beyond the core plate towards the end facing the press. The upper and lower parts of the clamping cavity formed between the side plates extending from the core plate are symmetrically connected to clamping arms via a swing shaft E. The clamping arms are connected by springs. The core plate is equipped with a clamping drive rod that is driven by a cylinder C. From the above structure, it can be seen that the vertical clamp for angle steel used in ultra-high voltage transmission towers of this utility model can clamp and fix the angle steel only at the angle of the angle steel end, thereby moving the angle steel towards the press without interfering with the feed rollers.

This application discloses a method for safety assessment of uneven settlement of transmission towers, relating to the field of power engineering monitoring technology. The method includes: acquiring multiple SAR images covering the target transmission line corridor within a preset time period; determining multiple transmission towers and their tilt conditions based on the SAR images and a target detection model; determining the limit state values ​​corresponding to each tilt condition based on the tilt conditions, a surrogate model, and a finite element model. The limit state values ​​are calculated based on the allowable stress and maximum component stress of the transmission tower, and the finite element model is established based on the mechanical performance state of the transmission tower components. Based on the limit state values, a safety assessment of the transmission tower's settlement is performed to obtain the assessment results. This application obtains the limit state values ​​of the transmission tower through a surrogate model and a finite element model, correlating the tilt conditions of the transmission tower with structural mechanics, thereby improving the accuracy of the transmission tower safety assessment.

A method for calculating the water catchment of transmission towers considering the influence of multiple factors includes the following steps: calculating the component shape coefficient; calculating the tower frame filling coefficient; calculating the projected area of ​​rainfall blocked by the tower; calculating the rainfall intensity P at the tower location; determining the rainfall angle α; determining the environmental calibration factor λ; calculating the water catchment of the transmission tower; and verifying the calculation through on-site monitoring. This invention provides a method for calculating the water catchment of transmission towers considering the influence of multiple factors, enabling accurate quantification of the water catchment of transmission towers during rainfall.

A method for monitoring and calculating the rainfall collection effect of transmission towers includes the following steps: constructing a rainfall trough; constructing a diversion trough; constructing a measuring trough; installing a Parshall flume; installing a rigid frame, an ultrasonic probe, and a flow meter; calculating the catchment level; calculating the catchment flow rate; calculating the equivalent rainfall intensity; and calculating the rainfall collection effect. This invention provides a method for monitoring and calculating the rainfall collection effect of transmission towers, capable of calculating equivalent rainfall intensity and rainfall collection effect, filling the gap in the lack of indicators and calculation methods for quantifying the rainwater collection effect of transmission towers.

The present application relates to the technical field of power transmission line monitoring, and discloses a kind of intelligent analysis method of transmission tower jumper three-dimensional space form based on machine learning.The method first obtains the multi-source sensor data stream such as laser radar point cloud data, texture image data and microclimate monitoring data of transmission tower jumper area;Based on laser radar point cloud data, jumper three-dimensional space reference model is constructed, other data is fused therein by space-time registration, and fusion three-dimensional field model is generated;From the model, the key point set of jumper and the corresponding spatial curvature distribution are extracted, and the spatial deviation vector of the form of transmission tower jumper and the preset standard form is calculated;Dynamic risk parameter set is constructed in combination with microclimate monitoring data, and multi-level threshold decision mechanism is triggered to generate form anomaly response instruction.The method realizes accurate evaluation and dynamic risk judgment of jumper form through multi-source data fusion and intelligent analysis, which helps to improve the intelligent level of transmission tower jumper monitoring.

The utility model provides a kind of reinforcing cross arm structure of transmission line tower, belong to transmission tower wind resistance reinforcing technical field, the reinforcing cross arm structure of this transmission line tower includes tower body structure and bottom support seat, tower body structure includes main support structure and lateral reinforcing cross arm, both are fixedly connected by diagonal bracing, and between connection setting shock absorption mechanism;Shock absorption mechanism includes suspension damper;Reinforcing cross arm below is provided with wire slot, and the inboard end of wire slot is connected with tower body structure by elastic connecting piece;Elastic connecting piece is equipped with self-adapting adjusting buffer component;Wire slot outside is equipped with reinforcing device, and reinforcing device includes multiple locking pins and locking block;Reinforcing cross arm and diagonal bracing, shock absorption mechanism junction is provided with sealed anticorrosive cavity, and cavity is filled with anticorrosive grease;The utility model can solve the problem that the cross arm structure of existing transmission tower is deformed easily, poor shock resistance and further affect the bearing strength caused by tension.

This invention belongs to the field of vibration reduction technology for transmission tower structures, and discloses a multi-dimensional vibration damper based on a planetary gear mechanism. It includes a particle packaging box and an inertia container; the inertia container includes a planetary gear inertia container and a helical rod inertia container; the planetary carrier and the limiter both function as limiters for the particle packaging box; viscoelastic material is distributed at the contact points between the planetary carrier and the limiter and the particle packaging box. It achieves high-efficiency vibration reduction while ensuring a simple and compact structure and low overall mass. Under lateral and vertical vibration conditions, the inertia container converts the horizontal translation of the rack into the rotation of the gear ring, using the rotation of the gear ring to drive the planetary gears in a combined revolution and rotation motion, causing the sun gear to drive the flywheel to rotate at high speed. Under longitudinal vibration conditions, the inertia container converts the translation of the helical rod into the rapid rotation of the helical rod cylinder through the screw thread, thereby driving the flywheel to generate inertial force and achieving structural vibration control.

The application provides a power transmission tower conductor wind deviation prevention device and method, and belongs to the technical field of power transmission line safety equipment. The power transmission tower conductor wind deviation prevention device comprises a support assembly, an insulating rod, an information acquisition module and a controller. The support assembly is fixedly connected to a tower cross arm; a wind response damper is hingedly connected to the end of the support assembly; the wind response damper is used for absorbing the vibration of the conductor. The top end of the insulating rod is connected to the wind response damper, and the bottom end is hingedly connected to a connecting assembly; the top of the connecting assembly is fixedly connected to the tower cross arm. The information acquisition module is used for collecting and outputting wind speed information. The controller is in communication connection with the information acquisition module and the wind response damper; the controller is configured to receive the wind speed information; and the opening of a damping hydraulic valve in the wind response damper is adjusted according to the wind speed information, so as to absorb the vibration of the conductor under different weather conditions. A system with structural support and dynamic adjustment functions is constructed, and the wind deviation prevention effect is improved from the aspects of structural stability and damping adaptability.

The application discloses a lightning stroke transmission tower state monitoring and evaluation method, relates to the technical field of state monitoring, and collects the ground potential signal data set of the transmission tower at the lightning moment in the system operation, carries out time synchronization processing on the signals of each monitoring point, obtains the ground potential mutation time sequence set, calculates the propagation time delay set between the monitoring points, establishes the propagation characteristic model in combination with the geometric distance set of the tower to the grounding body, generates the propagation characteristic distance set, and compares with the preset reference propagation characteristic distance set, calculates the deviation ratio set, determines that the grounding performance is abnormal when the deviation ratio set exceeds the threshold value, obtains the grounding dynamic impedance set, calculates the grounding performance index according to the grounding dynamic impedance set and the ground potential mutation energy set, compares with the historical standard performance index set again, generates the alarm set if the deviation exceeds the safety limit value, and outputs the safety control instruction to the monitoring system.