3297 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.

The invention provides a PCB wiring method, device and equipment, a medium and a product, and relates to the technical field of computers, in particular to the field of printed circuit boards and automatic driving. According to the specific implementation scheme, the method comprises the steps of determining a DDR wiring layer used for DDR signal line deployment of the DDR memory, a ground layer used for ground wire deployment and a power supply layer used for power line deployment according to lamination information of the PCB; wherein the lamination information is used for indicating a top layer, a middle layer and a bottom layer of the PCB, and the DDR wiring layer is located in the middle layer; and wiring the DDR signal line, the ground line and the power line according to the DDR wiring layer, the ground layer and the power supply layer.

The invention provides a tumor electric field treatment system, a temperature detection method and a signal control method, the tumor electric field treatment system comprises at least one pair of electrode plates, an electric field generator and an adapter, each electrode plate comprises a plurality of electrode units and a flexible circuit board, the flexible circuit board is embedded with a plurality of grounding wires and a plurality of dual-purpose signal wires, each grounding wire enables the electrode units located in the same row to be in short circuit and grounded, and each dual-purpose signal wire enables the electrode units located in the same column to be electrically connected and can transmit alternating current electric signals and temperature detection signals. The adapter comprises a plurality of groups of multi-path circuit lines, at least part of the circuit lines in each group of multi-path circuit lines are electrically connected with the multi-path grounding lines and the multi-path dual-purpose signal lines of the corresponding electrode plates in a one-to-one mode, and at least one circuit line in each group of circuit lines is in an idle state and is not electrically connected with the dual-purpose signal lines or the grounding lines of the corresponding electrode plates. Therefore, the adapter can be adapted to various electrode plates with different numbers of grounding wires and different numbers of dual-purpose signal wires.

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 discloses a power distribution network single-phase earth fault section positioning method based on multi-source data fusion, and the method comprises the steps: obtaining a power distribution cloud master station, dispatching remote signaling data, obtaining power distribution terminal grounding, bus grounding, small-current grounding line selection, arc suppression coil and bus voltage information through data cleaning, and carrying out the positioning of a single-phase earth fault section. Any information of a power distribution terminal grounding alarm signal, bus grounding and small current grounding line selection is used as a grounding research and judgment trigger condition; and after any information of a power distribution terminal grounding alarm signal, bus grounding and small current grounding line selection triggers grounding fault section research and judgment, the power distribution cloud master station respectively researches and judges a grounding fault section by adopting three kinds of information of grounding fault alarm information, a zero-sequence current remote measurement value and grounding fault recording. According to the method, the in-station line selection result, the relation between the neutral point grounding mode and the zero-sequence current, the terminal wave recording file and the terminal alarm information are considered at the same time, and the grounding fault section positioning method which is high in reliability, practicability and accuracy is comprehensively obtained.

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 relates to the field of power construction, in particular to a power distribution line insulation grounding wire clamp live-line installation method, which comprises the following steps: S1, clamping a grounding wire clamp into an installation seat of a grounding wire clamp installation device, and enabling the grounding wire clamp installation device to reach a set installation height in an insulation rod handheld or unmanned aerial vehicle remote control mode; s2, the grounding wire is clamped into a wire clamping groove of a grounding wire clamp, a wire clamp bolt of the grounding wire clamp is automatically screwed through a locking mechanism, and the grounding wire is pressed into the wire clamping groove through a gland; s3, automatically overturning the insulating cover by a buckling mechanism, and covering the insulating cover outside the gland; s4, turning over a lock catch on the insulating cover to enable a spring bolt of the grounding wire clamp to be clamped into a lock hole of the lock catch; and S5, dismounting the grounding wire clamp mounting device to enable the grounding wire clamp mounting device to be separated from the grounding wire clamp to complete mounting. Automatic installation of the grounding wire clamp can be completed, and the operation risk is low.

The utility model discloses a duckbilled 220kv quick suspension grounding wire device, which relates to the technical field of grounding wire devices and comprises an insulating rod, an operating rod connected with the insulating rod, a screw rod connected with a clamping block, an arc-shaped block fixedly provided with a special-shaped rod and a connecting rod, a clamping block fixedly provided with a stop lever, a tongue-shaped rod connected with a first spring and a movable block, and an inserting rod inserted with an inserting groove. A spring II is fixed on the connecting block; the insulating rod is held by a hand, the cable is attached to the special-shaped rod through the special-shaped rod, the cable makes contact with the arc-shaped face of the tongue-shaped rod, the insulating rod is moved, the tongue-shaped rod moves downwards, the cable penetrates through the tongue-shaped rod, the tongue-shaped rod returns to the original position, the rotating disc is rotated to enable the arc-shaped block to clamp the cable, the arc-shaped block drives the special-shaped rod to press the tongue-shaped rod downwards, the inserting groove and the inserting rod are connected, and hanging of the grounding wire device is completed. The problem that a wire clamp of a grounding wire is not easy to hang due to a small opening is solved, the situation that the clamping effect is improved by increasing the dead weight of an insulating rod is avoided, and the burden caused by the insulating rod is reduced.

The invention relates to a power transformer with an active anti-deflagration function and a monitoring method. The power transformer comprises a transformer oil tank, an ascending flanged base, a high-voltage bushing, a short-circuit copper sheet, a neutral point bushing, a high-frequency sensor and an ultrasonic sensor. The ascending flanged base and the neutral bushing are connected to the top of the transformer oil tank; one end of the high-voltage bushing is connected with the ascending flanged base through a bolt; two ends of the short-circuit copper sheet are respectively connected with two ends of any bolt; the neutral point bushing is grounded through a grounding wire; and the high-frequency sensor is respectively connected in series with the short-circuit copper sheet and the grounding wire. The ultrasonic sensors are arranged in the ascending flanged base and the transformer oil tank respectively, and the ultrasonic sensors in the transformer oil tank are distributed on the upper portion, the middle portion and the lower portion of the transformer oil tank. According to the power transformer, two kinds of partial discharge signals at different positions are collected, whether discharge occurs at different positions in the transformer or not is accurately judged in combination with a logic judgment method, the severity degree is judged, and therefore early warning or tripping instructions are accurately output at the initial stage of a fault to remove the fault, and operation safety is ensured.

The invention discloses a method and a system for studying, judging and handling a single-phase grounding fault of a power distribution network. The method comprises the following steps: acquiring a line selection alarm signal and a line selection result of a low-current grounding line selection device in a station; according to the line selection result, calculating the zero-sequence current variation of all the off-station terminals of the corresponding line; if the line topological structure passes the verification, replacing a specified terminal in the line topological structure with a lead to obtain a new line topological structure; hierarchical clustering is carried out on the out-of-station terminals according to the zero-sequence current variable quantity, the class with the large arithmetic mean value in the clustering result is a fault class, and the class with the small arithmetic mean value in the clustering result is a normal class; marking a fault point in the new line topological structure according to the out-of-station terminal corresponding to the fault class and the normal class; and isolating the fault points, and if the line selection alarm signal is not reset after all the fault points are isolated, iteratively executing the steps until the line selection alarm signal is reset. According to the method, iterative clustering is carried out in combination with the fault reset condition, and the single-phase earth fault can be accurately handled.

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 provides an interlocking ground clamp remote management system and method, and relates to the technical field of power systems, and the method comprises the steps: collecting the historical ground resistance data of each ground clamp in a normal state, calculating the baseline threshold value of each ground clamp based on the data, reading the ground resistance of each ground clamp in real time, and calculating the baseline threshold value of each ground clamp; the base line threshold value is dynamically adjusted based on all the real-time grounding resistances to obtain a dynamic threshold value, the real-time grounding resistances are compared with the dynamic threshold value, and the grounding wire clamps with the grounding resistances exceeding the safety range are found in time; when the real-time grounding resistance of a certain grounding wire clamp is detected to exceed the dynamic threshold value, the change rate is calculated based on the previous grounding resistance of the grounding wire clamp, the change rate threshold value is dynamically adjusted, and in a preset time window, if the change rate of the grounding resistance exceeds the dynamic change rate threshold value, fault information is generated in real time; by means of real-time monitoring, dynamic adjustment of the threshold value, introduction of the change rate threshold value and the like, efficient management of the grounding wire clamp is 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.

A method and apparatus for monitoring the current of grounding wires of armored and shielded cables in a strong electromagnetic environment. In the method, the sum current of armor layer grounding wires of M cables in a terminal box and the sum current of shield layer grounding wires are respectively collected, primary and secondary grounding copper bar potentials of the terminal box and the grounding current of an adjacent terminal box are collected; a potential difference alarm can be implemented; and on the basis of whether the potential difference alarm is implemented, different criteria are used to respectively implement an alarm for the circulating current of a cable loop in the terminal box.