2167 results about "Grounding line" patented technology

The invention relates to the field of cable monitoring, in particular to a high-voltage cable running state comprehensive monitoring method based on a TMR magnetic sensor. According to the method, firstly, a TMR magnetic sensor is adopted to collect sheath current and partial discharge pulse signals of a cable joint grounding wire, then amplification, filtering and AD change are carried out, Fourier transform is carried out, and low-frequency signals and high-frequency signals are separated out; carrying out frequency spectrum analysis on the high-frequency signal, preliminarily judging whether a discharge defect exists or not, carrying out Fourier inversion on the low-frequency signal, evaluating a grounding state and an insulation health state of a cable sheath, carrying out Fourier inversion on the high-frequency signal, and carrying out partial discharge fault type analysis in combination with a time domain partial discharge pulse signal and a power frequency current phase; and finally, comprehensively evaluating the operation state of the high-voltage cable by analyzing the grounding current of the sheath and the related parameters of partial discharge. According to the invention, the hardware cost is reduced, the system design and installation complexity is simplified, and the accuracy of partial discharge fault type identification is improved.

The invention relates to the technical field of sensors, in particular to a transformer dynamic magnetic bias current detection method and device based on magnetoelectric coupling sensing, and the detection device composed of a magnetoelectric coupling sensing element, an exciting coil and a rear-end processing circuit is used for measuring direct current magnetic bias current. The working principle of the magnetoelectric coupling sensing element is based on stress coupling between the magnetostrictive material and the piezoelectric material, then an output signal is generated on the piezoelectric material, and the sensitivity is remarkably improved by using the resonance amplification effect of the magnetoelectric coupling sensing element. Non-contact current detection can be realized by detecting the magnetic field generated by the magnetic bias current of the neutral point grounding wire of the transformer, and direct physical contact with power equipment is not needed, so that the safety of the system is improved, and the problem of high installation difficulty of a contact sensor is avoided; high-sensitivity, high-precision, anti-interference and real-time transformer direct-current magnetic bias current monitoring is achieved, and the transformer direct-current magnetic bias current monitoring device has the advantages of being easy to install and deploy and small in size.

The invention provides a tumor electric field treatment system, an electrode slice temperature detection method and an electrode slice anomaly detection method, the system comprises an electrode slice and an adapter provided with a first controller, the electrode slice comprises a plurality of electrode units and a plurality of temperature detection units, the plurality of temperature detection units are divided into a plurality of row groups and a plurality of column groups, and the first controller is connected with the adapter. The grounding ends of the temperature detection units in each row group are jointly connected to the same grounding wire, and the signal ends of the temperature detection units in each column group are connected to the same dual-purpose signal wire after being in short circuit with the corresponding electrode units; when the dual-purpose signal line is connected to the temperature sampling point, the grounding wires are sequentially conducted, so that temperature detection signals detected by the temperature detection units are sampled based on the temperature sampling point; when the dual-purpose signal line is connected to the alternating power line, alternating electric signals are transmitted to the electrode units. Therefore, the temperature of the electrode plate can be detected by using fewer conductive traces, and whether the electrode plate is abnormal or not can be judged through temperature detection.

The invention provides a ground wire monitoring method and system, and relates to the technical field of ground wire monitoring. The method comprises the following steps: acquiring a voltage signal of an injection point and a current signal of a grounding loop; preprocessing the signal to obtain a preprocessed signal; according to the preprocessed signals, impedance frequency spectrums of the grounding loop under different frequencies are obtained through calculation, and key feature parameters in the impedance frequency spectrums are extracted; environment parameters and operation state data of the power equipment are collected and fused with the key feature parameters, and fused data are obtained; adjusting a judgment threshold value or a reference baseline corresponding to the key feature parameters by using the fused data; and judging the current grounding loop state by using the adjusted judgment threshold value or reference baseline. According to the method, based on impedance spectrum analysis, electromagnetic interference is overcome through multi-stage signal processing, robust feature extraction and multi-dimensional data fusion analysis, and the effects of adapting to a dynamic baseline and distinguishing different electric leakage types are achieved.

The invention provides a tumor electric field treatment system, an electrode slice temperature detection method and an electrode slice anomaly detection method, the system comprises an alternating current signal generator, an electrode slice and a controller, the electrode slice comprises a plurality of electrode units and a plurality of temperature detection units, the plurality of temperature detection units are divided into a plurality of row groups and a plurality of column groups, and the plurality of electrode units are connected with the controller. The grounding ends of the temperature detection units in each row group are jointly connected to the same grounding wire, and the signal ends of the temperature detection units in each column group are connected to the same dual-purpose signal wire after being in short circuit with the corresponding electrode units; when the dual-purpose signal line is connected to the temperature sampling point, the grounding wires are sequentially conducted, so that temperature detection signals detected by the temperature detection units are sampled based on the temperature sampling point; when the dual-purpose signal line is connected to the alternating power line, alternating electric signals are transmitted to the electrode units. Therefore, the temperature of the electrode plate can be detected by using fewer conductive traces, and whether the electrode plate is abnormal or not can be judged through temperature detection.

A tool for hanging and disassembling a grounding wire of a power transmission line tower through an unmanned aerial vehicle comprises the unmanned aerial vehicle, a detachable connecting rod frame is installed on the unmanned aerial vehicle, and two hanging rings are connected to the bottom end of the connecting rod frame. And the high-altitude falling risk and the induced electric shock hidden danger caused by manual tower climbing are thoroughly eliminated. An operator can perform remote control on the ground and is prevented from being directly exposed to a high-voltage electric field and a severe tower environment, so that the life safety of the operator is fundamentally guaranteed, and the system conforms to the development trend of'few-person and unmanned 'operation and maintenance of an intelligent power grid. The unmanned aerial vehicle can quickly pass through complex terrains to approach an operation point, is particularly suitable for special tower positions such as mountainous areas and cross rivers, greatly improves the operation efficiency, and remarkably improves the operation safety. A traditional manual grounding wire hanging and dismounting mode is changed, the device is not influenced by the terrain and the tower type, the operation process is convenient and fast, the maintenance operation time is shortened, the labor intensity is reduced, and the personal safety is ensured.

The invention relates to the technical field of power equipment monitoring, in particular to a ground wire state intelligent monitoring method based on multi-modal information fusion, which comprises the following steps: acquiring ground wire multi-modal monitoring data including image data, inertial sensing data and time sequence task data; a deep learning target detection algorithm is adopted for the image data to identify key components in the image, wherein the key components at least comprise a wire clamp, a connecting bolt and a hanging point; the preliminary judgment is based on the identified key components, the spatial relation features, geometric features and visual features of all the components are analyzed, and a preliminary result of the state of the grounding wire is generated according to a preset judgment rule; fusion verification: performing multi-modal fusion verification on the judged preliminary result, the attitude data and the time sequence task data, and outputting a final state judgment result; according to the invention, by fusing the image data, the inertial sensing data and the time sequence task data, accurate judgment and graded early warning of the hitching state of the ground wire are realized, and the safety risk of electric power overhaul operation is reduced.

The invention provides a tumor electric field treatment system, an electrode slice temperature detection method and an electrode slice anomaly detection method, the system comprises an electrode slice and an adapter provided with a first controller, the electrode slice comprises a plurality of electrode units and a plurality of temperature detection units, the plurality of temperature detection units are divided into a plurality of row groups and a plurality of column groups, and the first controller is connected with the adapter. The grounding ends of the temperature detection units in each row group are jointly connected to the same grounding wire, and the signal ends of the temperature detection units in each column group are connected to the same dual-purpose signal wire after being in short circuit with the corresponding electrode units; when the dual-purpose signal line is connected to the temperature sampling point, the grounding wires are sequentially conducted, so that temperature detection signals detected by the temperature detection units are sampled based on the temperature sampling point; when the dual-purpose signal line is connected to the alternating power line, alternating electric signals are transmitted to the electrode units. Therefore, the temperature of the electrode plate can be detected by using fewer conductive traces, and whether the electrode plate is abnormal or not can be judged through temperature detection.

The invention discloses a distributed grounding line selection method and system based on phase current abrupt change, and the method comprises the steps: obtaining three-phase current of a line, and calculating a phase current abrupt change real-time value, a phase current abrupt change derivative and a phase current abrupt change effective value in the three-phase current; judging whether the phase current break variable derivative and the phase current break variable effective value meet a preset phase current break variable starting condition or not in a continuous first time period; if the preset phase current abrupt change starting condition is met, whether the phase current abrupt change line selection action in a continuous second time period meets a preset phase current abrupt change line selection action condition or not is judged; and if a preset phase current break variable line selection action condition is met, determining that the line has a single-phase earth fault and the fault phase in the line is the phase with the maximum current break variable in the three phases. And a single-phase earth fault line can be quickly positioned.

The invention relates to a hybrid supercapacitor energy storage type converter based on an H bridge and an operation method thereof, and the energy storage type converter comprises an upper bridge arm part and a lower bridge arm part. Each of the upper bridge arm part and the lower bridge arm part comprises three bridge arms, and each bridge arm is formed by connecting n H-bridge sub-modules and a bridge arm inductor in series; the upper bridge arm part is connected with a direct current bus, and the lower bridge arm part is connected with a grounding wire; the H-bridge sub-module comprises four switch elements and an energy storage unit, the energy storage unit is a hybrid super capacitor, the four switch elements form an H-bridge structure, and the hybrid super capacitor is connected to the two ends of the H-bridge structure in parallel. According to the invention, the dual functions of energy storage and current conversion in the AC-DC interconnected power grid can be realized under the cooperation of the control strategy, and various operation requirements in different scenes can be met.

The invention discloses a cable operation environment optimization method based on cable trench collection information, and relates to the technical field of intelligent operation and maintenance of a power system, and the method comprises the steps: collecting an original parameter data set in a cable trench; a pulse current signal is collected at a cable grounding wire connection point, and a standard pulse discharge capacity sequence is generated through band-pass filtering and amplitude integral conversion; based on the original relative humidity measurement value and the environment temperature value, calculating a compensated relative humidity value through a multi-scale heat conduction-diffusion coupling equation; calculating a cable insulation risk index through a quantum annealing algorithm by using the compensated relative humidity value and the standard pulse discharge capacity sequence; the dynamic measurement deviation of the temperature and humidity sensor is subjected to double compensation of thermal radiation and molecular adsorption by constructing a multi-scale heat conduction-diffusion coupling equation, so that the reliability of environmental state sensing is greatly improved, and the operation safety, stability and intelligent operation and maintenance level of a power cable system are effectively enhanced.

The invention discloses a power distribution network grounding line selection analysis and fault location method based on signal feature identification. The method comprises the following steps: extracting a fault signal of a monitoring point; adopting an AGCN-TCN model to carry out fault identification and classification on the fault signals; local outlier factors of the monitoring points are calculated, fault signals of all the monitoring points are decomposed according to sliding windows, sliding window frequency domain assignments obtained after decomposition serve as frequency domain fault indexes, fault position judgment comprehensive indexes are constructed based on the local outlier factors and the frequency domain fault indexes, and the positions of fault points are judged through the fault position judgment comprehensive indexes; according to the method, the AGCN-TCN model is innovatively constructed for the distributed power distribution network, feature extraction and analysis of fault signals are realized from the angles of space and time, and decision errors caused by faults of single monitoring equipment are avoided; according to the method, a fault position judgment comprehensive index is defined, the fault position is judged from the double angles of the time domain and the frequency domain, and inaccuracy of a single method is avoided.

The utility model relates to the technical field of power distribution network uninterruptible operation, and discloses a power distribution network uninterruptible multifunctional wire clamp, which comprises a basic pressing seat, a lifting control mechanism, a movable pressing block, a limiting pressing plate and a grounding hanging ring, the basic pressing seat comprises a crimping arc plate located at the top, a crimping back plate located in the middle and a connecting seat body located at the bottom; the movable pressing block can vertically move relative to the crimping arc plate through the lifting control mechanism, and then the movable pressing block is matched with the crimping arc plate to clamp a set cable. The limiting pressing plate is installed on the crimping backboard on the other side of the basic pressing seat, the limiting pressing plate is matched with the crimping backboard to clamp a lead cable and a grounding hanging ring, the grounding hanging ring can hang a grounding wire, the lead cable can be connected with a transfer line, and therefore the problems that in the prior art, a wire clamp structure is single in function, and the grounding wire can not be connected with the ground wire are solved. The flexible adaptability to complex operation scenes is poor, the construction labor cost is high, and the efficiency is low.

The invention provides an electric power operation ground wire intelligent positioning and early warning control method and system, and relates to the technical field of electric power operation safety monitoring, and the method comprises the steps: constructing a double-layer architecture cooperative intelligent positioning system, processing multi-source sensing data through employing a self-adaptive particle swarm optimization data fusion algorithm, and optimizing a spatial topological relation through a graph attention mechanism; extracting features from the time sequence state sequence by adopting multi-scale and cavity convolution, and constructing a space-time double-flow heterogeneous graph; and in combination with a power operation field knowledge graph and Monte Carlo tree search, risk early warning scoring is realized. According to the invention, the grounding wire position monitoring precision and the risk early warning accuracy are improved, and the power operation safety guarantee capability is enhanced.

Disclosed is a substrate treating apparatus for performing a predetermined treatment on a substrate. The apparatus includes: a spin table configured to be rotatable around a vertical axis; a rotational driving device having a grounded rotary shaft connected to a center portion of the spin table and configured to rotate the spin table in a horizontal plane; a holding mechanism having a plurality of support pins, provided on a top face of the spin table adjacent to an outer circumference and made of a conductive material, and configured to hold a substrate in a horizontal posture while the substrate is spaced apart from the top face of the spin table; and a ground line having conductivity, constituting a part of the spin table, and electrically connecting the plurality of support pins and the rotary shaft.

The invention provides an ultra-high voltage anti-overturning spiral plain end grounding clamp, and relates to the technical field of power transmission line maintenance equipment, and the grounding clamp comprises an outer frame, one side of which is provided with an opening; the movable clamping block is arranged in the outer frame, and one end of the movable clamping block is connected with the side, opposite to the opening, of the outer frame in a sliding mode; the adjusting screw rod penetrates through the upper part of the outer frame and is in threaded connection with the outer frame, and the lower end of the adjusting screw rod is rotatably connected with the movable clamping block; the upper end of the telescopic rod is connected with the outer frame; and the balancing weight is connected to the lower end of the telescopic rod. The grounding wire clamp has the beneficial effects that the interference of external force is resisted by using the torque generated by the gravity of the balancing weight, so that the wire clamp does not turn over when being influenced by the external force such as natural wind power and the gravity of the grounding wire in the working process of clamping the grounding wire, and can be always kept in a vertical state; the safety and reliability of the automatic grounding work of the ultra-high voltage transmission line are improved, and the risk is reduced.

The invention provides a modularized grounding box for centralized grounding of multiple paths of high-voltage cables, which comprises a box body, a plurality of independent compartments are arranged in the box body, and a protector grounding unit or a direct grounding unit is arranged in each compartment. Each protector grounding unit or direct grounding unit is connected with a copper shielding layer and a grounding wire of an armor layer of the corresponding high-voltage cable; a centralized grounding unit and a centralized monitoring unit are also arranged in the box body; the centralized grounding unit is used for grounding each protector grounding unit and each direct grounding unit; the centralized monitoring unit is used for analyzing the operation state of the high-voltage cable and equipment. According to the high-voltage cable grounding box, a plurality of independent compartments are designed in the box body, so that mutual crosstalk of signals among grounding units is avoided, the overhaul efficiency of the high-voltage cable grounding box is improved, centralized maintenance of the grounding box is facilitated, and the investment cost is reduced; and meanwhile, one-point grounding is uniformly concentrated in the grounding box, so that the problem of fault hidden dangers of a plurality of grounding points formed by in-situ multi-point distributed installation is solved.

The invention relates to the technical field of power transmission and distribution overhead lines, and discloses a power transmission and distribution overhead line ground wire monitoring method, a positioning forwarding circuit and a device, which are used for improving the accuracy and efficiency of ground wire hanging and dismounting management. The power transmission and distribution overhead line grounding wire monitoring method comprises the steps of obtaining operation task information, obtaining and selecting a target tower, and performing navigation operation based on geographic coordinates of the target tower; after a navigation designated position is reached according to the navigation information, a mobile terminal is used for carrying out coordinate positioning checking on a target tower, grounding hitching operation processing is carried out after checking is correct, hitching position coordinates and real-time hitching and detaching state information of a target grounding wire are collected in real time through a grounding wire monitoring device, and whether hitching succeeds or not is judged through a cloud server side; if hitching is successful, hitching success confirmation information is displayed on the mobile terminal, the operation state is updated, and hitching success records and related information are stored in a database.

The invention belongs to the technical field of equipment state monitoring and fault diagnosis, and relates to a pole-mounted switch damp defect diagnosis method and system based on multi-source information fusion, and the method comprises the steps: collecting a leakage current signal and a high-frequency pulse current signal flowing through a grounding wire in real time, and environment parameters around a target pole-mounted switch; preprocessing the leakage current signal and the high-frequency pulse current signal, and performing feature extraction based on the preprocessed leakage current signal, the preprocessed high-frequency pulse current signal and environmental parameters to obtain a leakage current feature quantity, a high-frequency discharge feature quantity and an environmental coupling factor; and based on the leakage current characteristic quantity, the high-frequency discharge characteristic quantity and the environment coupling factor, judging a damp fault of the target pole-mounted switch, and combining a D-S evidence theory and fusing multi-source information confidence to complete damp defect diagnosis of the target pole-mounted switch. According to the invention, complementarity between different information sources can be fully utilized, and the damp state of the pole-mounted switch can be accurately judged.

The invention provides a grounding wire state monitoring and early warning system and method based on a random forest algorithm, relates to the technical field of electric power safety monitoring, and solves the limitation problems of low efficiency, poor data continuity, inaccurate early warning judgment and the like in the existing scheme. In the system, a multi-source sensor network acquires multi-dimensional operation data corresponding to a grounding wire and transmits the data to a data acquisition terminal; the data acquisition terminal performs feature extraction processing to generate a feature vector set and uploads the feature vector set to the cloud data processing platform; the cloud data processing platform uses a random forest classification model, based on the feature vector set, realizes dynamic feature weight adjustment through feature importance analysis, constructs a hierarchical decision tree structure, identifies and outputs a grounding wire fault mode, and issues the grounding wire fault mode to the local early warning terminal; and the local early warning terminal provides early warning information for the ground wire site by adopting a graded and differentiated early warning mode. According to the invention, high-precision early warning and predictive maintenance of the state of the grounding wire are effectively realized.

The invention discloses a device and a method for hanging or taking a ground wire of a high-voltage wire by an unmanned aerial vehicle, and belongs to the technical field of equipment maintenance in the power industry, and the device comprises the unmanned aerial vehicle, wire hanging equipment, tower hanging equipment, a soft copper wire and a hanging buckle fixing support. The unmanned aerial vehicle is movably connected with the line hanging equipment; the line hanging equipment is movably connected with the back of the tower hanging equipment; when a wire is hung on the wire hanging equipment, the rotary self-locking mechanism seals the opening along with extrusion of the wire to form self-locking; after the unmanned aerial vehicle is separated from the hanging frame, the clamping tongue on the plate frame rotates to clamp the wire; when the tower hanging equipment is clamped on the hanging buckle fixing support, the rocker arm extrudes the arc-shaped semi-hanger to complete self-locking, and when the force arm rod swings to a preset angle, the arc-shaped semi-hanger is driven to rotate, and the rocker arm is unlocked. Through the specific mechanical structure design, the unmanned aerial vehicle can stably mount the grounding wire device in the flight process, the situation that the grounding wire device inclines due to shaking of the unmanned aerial vehicle is avoided, and the efficiency and safety of wire hanging grounding operation are improved.

The invention provides an automatic grounding wire clamp which comprises a grounding wire clamp body, an electric locking mechanism and an execution assembly, the electric locking mechanism comprises a locking sliding block driven by the execution assembly to move, and the execution assembly is started when a locking switch and an unlocking switch are triggered. The locking sliding block is driven to move close to the hook part of the grounding wire clamp main body to form a locking state for locking the cable and to move away from the hook part to form an unlocking state for unlocking the cable; a locking push block is movably arranged at the groove cavity of the hook part, is extruded by the cable sliding into the groove cavity of the hook part, and slides to trigger the locking switch; the upper part of the grounding wire clamp main body is provided with a lifting ring for lifting the unmanned aerial vehicle, the lifting ring can slide along the vertical direction, an unlocking push block is fixed on the lifting ring, and the unlocking switch is triggered when the unlocking push block slides upwards along with the lifting ring. According to the invention, automatic locking and unlocking can be realized in the mounting and dismounting process of the grounding wire clamp.

The invention belongs to the technical field of high-voltage line grounding equipment, and particularly relates to a lockable grounding wire clamp device mounted by an unmanned aerial vehicle and a method for introducing backflow in a high-voltage line into the ground, and the lockable grounding wire clamp device mounted by the unmanned aerial vehicle can be carried by the unmanned aerial vehicle to complete grounding operation of the high-voltage line in maintenance. The lockable grounding wire clamp device is time-saving and safe for on-site constructors, a unique locking and unlocking mechanism composed of a lock cylinder, a clamping jaw assembly, a spring bolt driving piece and an unmanned aerial vehicle mounting assembly enables a high-voltage wire to enter a high-voltage wire claw embracing area, and then high-voltage wire claw embracing can be completed under the self-gravity effect of the lockable grounding wire clamp device; according to the invention, connection and locking of the high-voltage line are realized, the locking mode is relatively reliable, unlocking can be realized only by pulling up the unmanned aerial vehicle mounting assembly, and safe grounding in adverse weather such as strong wind is realized. When the unmanned aerial vehicle needs to be taken down, unlocking can be achieved by connecting the unmanned aerial vehicle with the unmanned aerial vehicle mounting assembly and pulling the unmanned aerial vehicle mounting assembly upwards, and unlocking is convenient and fast.

The invention relates to the technical field of electric power operation and maintenance, in particular to an assembly type grounding device for electric power operation and maintenance, which comprises a grounding plate arranged at the top, a grounding rod arranged at the lower end of the grounding plate and a grounding head arranged at the lower end of the grounding rod, the grounding plate comprises a first flange plate arranged at the upper end, a second flange plate arranged at the lower end and connected with the grounding rod, and a grounding connecting sleeve arranged between the first flange plate and the second flange plate, a conductive sleeve is arranged in the grounding connecting sleeve, and the conductive sleeve is connected with a grounding wire arranged on the side face and a conductive rod arranged at the lower end; the conducting rod is arranged in the middle of the grounding rod and connected with the grounding plate, a grounding box is arranged at the upper end of the first flange plate, and a first motor and a winding assembly are arranged at the upper end of the grounding box in a left-right distribution mode. The assembly type grounding device has the advantages that the grounding part can be prevented from being exposed to cause touch and scratch, the safety is improved, the safety of the assembly type grounding device is guaranteed, and the safety of workers is better guaranteed.

The invention relates to the technical field of antennas, and discloses a reconfigurable transflective array antenna applied to non-line-of-sight microwave propagation, which comprises a control circuit, and a first polarization grid layer, a first dielectric layer, M * N resonant sheets, a second dielectric layer and a second polarization grid layer which are sequentially arranged, the resonance piece comprises a radiation part, a grounding wire, four extension parts and two PIN diodes, the four extension parts are symmetrically arranged on the periphery of the radiation part and are connected with the radiation part, and the two PIN diodes are respectively arranged on two adjacent extension parts and are respectively connected with the upper polarization grid layer and the lower polarization grid layer through bending wires on the extension parts and metal columns in the dielectric layer; one end of the grounding wire is connected with the radiation part, and the other end is connected with direct-current ground; and the control circuit controls the connection and disconnection of the PIN diode through the polarization gate layer to realize a transmission mode or a reflection mode. The reconfigurable transflective array antenna applied to non-line-of-sight microwave propagation is relatively simple in structure, and loss can be reduced.

The invention relates to the technical field of grounding devices, and provides a grounding device and a power system.The grounding device is used for connecting a three-phase wire to a grounding grid and comprises a supporting piece, a first conductive piece, a second conductive piece, a grounding assembly and a limiting assembly. The first conductive part is rotatably connected to the supporting part, the second conductive part is rotatably connected to the supporting part, the second conductive part and the first conductive part define a limiting cavity, the supporting part and a first wire in the three-phase wires are located in the limiting cavity, one end of the grounding assembly is connected to the first wire, and the other end of the grounding assembly is connected to the ground screen. The limiting assembly is rotatably connected to at least one of the first conductive piece and the second conductive piece, the limiting assembly is provided with a limiting part, and the limiting part is connected to at least one of a second wire and a third wire in the three-phase wires. According to the invention, the problems of complex operation and low operation efficiency in manual installation of the grounding wire on the three-phase wire can be solved.

The invention discloses a ground wire full life cycle management method, relates to the technical field of power equipment asset management, and aims to solve the problems that manual recording is easy to tamper, cloud diagnosis delay is high and an alarm mode is single and easy to neglect in traditional ground wire management. According to the method, operation fingerprints and spatio-temporal information during grounding wire hooking are recorded through the block chain technology, and it is ensured that data cannot be tampered; a built-in lightweight AI model of the edge computing unit is used for analyzing sensor data in real time to carry out localized fault diagnosis; and triggering a multi-mode sound-light alarm controlled by the PWM signal according to the diagnosis result grade. The system realizes full-life-cycle credible traceability, sub-second fault response and high-recognition-rate alarm of the state of the grounding wire, and is suitable for intelligent operation and maintenance of the grounding wire in the field of a transformer substation and the like.

The invention provides an unmanned aerial vehicle ground wire hanging and dismounting robot for medium and low voltage power transmission lines, which is an unmanned aerial vehicle and is provided with ground wire hanging and dismounting equipment at the bottom. The ground wire hanging and dismounting equipment comprises a mechanical arm with a quick-change male head, and further comprises a bistable hanging and dismounting device for fixing a ground wire through a ground cover plate. A quick-change female head is arranged at the tail end of the bistable hanging and dismounting device, and an electric push rod and a clamping jaw are arranged at the head end; when the unmanned aerial vehicle installs a grounding wire, the clamping jaw impacts a grounding hanging ring of a power transmission line through flying to trigger the hanging and dismounting triggering structure, the hanging and dismounting triggering structure drives the quick-change female head and the quick-change male head to be separated and meanwhile gathers the clamping jaw, and the grounding wire is hung at the grounding hanging ring through the bistable hanging and dismounting device separated from the unmanned aerial vehicle. The quick-change male head of the mechanical arm is used for clamping the bistable hanging and dismounting device at the grounding hanging ring, and then the electric push rod is driven to enable the clamping jaw to loosen the grounding hanging ring; the operation efficiency of hanging and detaching the ground wire can be improved, and efficient and safe unmanned operation is achieved.

The single-double-hand hammering spot welding gun comprises a gun body, a sliding rod is arranged at the front end of the gun body, one end of the sliding rod is connected with the gun body, and a spot welding head is arranged at the other end of the sliding rod; the spot welding head comprises a welding unit and a grounding unit, the welding unit is connected with a power supply line, the grounding unit is connected with a ground wire, an insulation structure is arranged between the welding unit and the grounding unit, the grounding unit is fixedly arranged on the sliding rod, and the welding unit extends out of the grounding unit. The extension end of the welding unit retracts towards the grounding unit after being pressed in contact with the metal plate, so that the grounding unit is in contact with the metal plate for welding at the same time; a sliding weight is arranged on the sliding rod, the sliding rod is sleeved with the sliding weight, and the sliding weight can slide along the sliding rod. According to the single-double-hand hammering spot welding gun, due to the fact that the single-double-hand hammering spot welding gun is provided with a ground wire connecting structure and a drawing function at the same time, matching of corresponding external devices is not needed, and the portability and convenience of equipment are improved.

According to the grounding resistance reducing device of the oil-immersed transformer and the using method of the grounding resistance reducing device, the grounding resistance reducing device is arranged on one side of a body of the oil-immersed transformer, the oil-immersed transformer is provided with a grounding wire, the grounding wire is connected with a grounding electrode inserted into the ground, and a resistance reducing device is arranged over the grounding electrode. The resistance reduction device comprises a rainwater collection pool located on the ground, a conductive material chamber arranged in the rainwater collection pool and a plurality of liquid distribution pipes communicated with the rainwater collection pool, the liquid distribution pipes are inserted underground and located around the grounding electrode, a plurality of liquid outlet holes facing the grounding electrode are formed in the liquid distribution pipes, and soil monitoring units are arranged on the lower portions of the liquid distribution pipes; a first automatic discharging valve is arranged on the lower portion of the rainwater collecting pool, a water level monitoring unit is arranged in the first automatic discharging valve, the first automatic discharging valve is provided with a liquid outlet located in the lower portion, and the upper portions of the liquid distribution pipes are all communicated with the liquid outlet. Rainwater in the rainwater collecting pool is discharged through the first automatic discharging valve, and the rainwater flows to the position near the grounding electrode through the multiple liquid distribution pipes, so that the conductivity of soil is improved.