68 results about "Soil resistivity" patented technology

The invention provides a ground resistance testing method and device suitable for a railway system, and the method comprises the steps: determining a first inter-electrode voltage value between a tested ground grid and a first potential electrode based on a first testing loop and excitation current provided for the first testing loop, and determining a second inter-electrode voltage value between a tested ground grid and a second potential electrode based on a second testing loop; and determining a second inter-electrode voltage value between the tested ground grid and the second potential electrode according to the first inter-electrode voltage value provided for the first test loop and the excitation current provided for the second test loop, and determining the grounding resistance of the tested ground grid and the soil resistivity of the tested ground grid based on a predetermined correction factor, the excitation current value, the first inter-electrode voltage value and the second inter-electrode voltage value. The compensation resistance is counteracted by adding the test electrode and introducing the correction factor, so that the test method of the grounding resistance is simplified. And the zero potential region does not need to be repeatedly measured and searched, so that errors caused by manually searching the zero potential region are avoided, and the accuracy of the grounding resistance test is improved.

The invention discloses a fan blade lightning protection design method and system based on fan grounding resistance, and the method comprises the steps: analyzing a set grounding impedance model, and selecting a most suitable grounding impedance model; designing a fan grounding device according to the most suitable grounding impedance model; optimizing the grounding electrode according to the soil resistivity; based on a target of efficiently guiding and transmitting thunder and lightning, determining materials of a fan blade, a lightning protection lightning arrester and a down lead; through setting a connection mode, the lightning protection lightning arrester, the downlead, the blade root and the fan grounding device are firmly connected in pairs; according to the parameters of the fan blade and the potential difference between the fan blade and the ground, the electric field intensity in the fan blade during lightning stroke is calculated; and optimizing and adjusting the fan blade according to the electric field intensity. The fan blade can be protected from being struck by thunder and lightning, and damage to equipment and personnel is reduced.

The invention discloses a high-density electric quantitative interpretation method based on a soil resistivity calculation model, and the method specifically comprises the steps: 1, measuring the physical characteristics of a sampling soil body in a detection region, carrying out the orthogonal test of main influence factors of the resistivity of the soil body, and analyzing the primary and secondary factors which affect the change of the resistivity; 2, selecting three factors with large influence degrees to carry out a quantitative test, and determining a quantitative relationship between the resistivity of the soil sample and the influence factors; step 3, based on the quantitative relation between the resistivity and each influence factor, fitting to obtain a soil resistivity calculation model of the detection area; 4, carrying out a nondestructive testing field test on the detection area to obtain an apparent resistivity image of the area; and 5, performing qualitative and quantitative double interpretation on a field detection result by combining an indoor test and a field test. The problem that in the prior art, high-density television resistivity result analysis depends on manual subjective experience judgment, and large uncertainty exists is solved.

The invention provides a pumped storage power station differential grounding platform setting method and system and electronic equipment, and the system comprises a space-time multi-physics field feature description module which is used for collecting multi-source heterogeneous data of the whole field domain of a pumped storage power station, and a four-dimensional geoelectric structure model capable of reflecting soil resistivity space distribution and time dynamic change is constructed through the data, and a grounding short circuit fault risk distribution diagram of the whole field domain is generated according to the model and a preset short circuit current level. According to the method, the four-dimensional geoelectric structure model is constructed, so that too simplified homogenization and static assumptions in traditional design are abandoned fundamentally, the real physical environment of the complex site of the pumped storage power station can be scientifically represented with unprecedented precision and dimensionality, and a solid data and physical model foundation is laid for subsequent precise design.

The utility model discloses a split-type grounding electrode and a carbon fiber composite complete grounding device, the split-type grounding electrode comprises a grounding tip and a plurality of solid graphite grounding rods, the plurality of solid graphite grounding rods are connected end to end in series, the tail end of the solid graphite grounding rod at the rearmost end is connected with a copper movable hammer, and the tail end of the solid graphite grounding rod at the rearmost end is connected with a carbon fiber composite grounding device. The movable hammer head comprises a first belt penetrating channel and a second belt penetrating channel which are vertically arranged side by side. The complete set of grounding device comprises a grounding down lead, a carbon fiber composite graphite blanket, a carbon fiber composite graphite belt, a connector and a grounding module. The grounding electrode provided by the utility model is provided with the detachable movable hammerhead, and the movable hammerhead can be quickly connected with the graphite belt, so that the construction is convenient. The grounding electrode is combined with a carbon fiber composite graphite belt / blanket, a multi-dimensional conductive network is formed by using high conductivity of carbon fibers and excellent ionic conductivity of graphite, the diffusion efficiency is effectively improved, and the carbon fiber composite graphite belt / blanket is especially suitable for regions with high soil resistivity.

The invention relates to the technical field of gas meter controller testing, in particular to a wireless communication intelligent gas meter controller and a control method thereof. Comprising a microprocessor, an electrochemical corrosion monitoring module, a soil resistivity acquisition device, a stray current monitoring unit, a wireless communication unit, a metering unit and an anti-corrosion regulation and control unit, the signal output ends of the electrochemical corrosion monitoring module, the soil resistivity acquisition device and the stray current monitoring unit are respectively and electrically connected with the signal input end of the microprocessor; the control output end of the microprocessor is respectively and electrically connected with the control input ends of the wireless communication unit, the metering unit and the anti-corrosion regulation and control unit; the electrochemical corrosion monitoring module is used for collecting hydrogen sulfide concentration, relative humidity and environment temperature parameters, converting analog signals into digital signals and transmitting the digital signals to the microprocessor. The system can cope with the coupling influence of multiple environment factors in a cooperative mode.

The invention discloses a system and a method for in-situ measurement of thermodynamic electrical parameters of a rock-soil body. The system comprises an in-situ detection probe, a data acquisition instrument, a penetration assembly for connecting the in-situ detection probe and the data acquisition instrument, and a data analysis platform connected with the data acquisition instrument, the in-situ detection probe comprises a CPTU static sounding probe, a four-phase pole resistivity probe, a heating probe inserted into a hollow cylinder of the four-phase pole resistivity probe, and an adapter connected with the CPTU static sounding probe and the four-phase pole resistivity probe; the four-phase electrode resistivity probe comprises a hollow metal shell, and an insulating material, a voltage electrode and a current electrode are arranged on the outer ring of a cylinder at intervals. During testing, the resistivity of the soil body is firstly tested, then the heating wire is electrified and heated, and the four-phase pole resistivity probe is used as a temperature sensor of the heating probe, so that synchronous testing of soil layer classification and thermodynamic electrical parameters of the rock-soil body is realized. The invention further provides a column heat source-parameter estimation method for thermal parameter testing, and the testing accuracy is remarkably improved.

The present invention discloses a method for detecting leakage in a solid waste landfill, comprising a plurality of pre-buried electrodes. The pre-buried electrode array is buried in the soil surrounding the landfill area, and the soil resistivity between adjacent pre-buried electrodes is used to identify whether there is a leak along the path. The pre-buried electrodes include hollow balls and wires. The detection device also includes a pipe system and a suction pump. The pipe system includes a main pumping pipe, a main water supply pipe, a plurality of flow pipes, and a branch valve. The hollow balls are buried in the soil surrounding the landfill area. The inner cavity of each hollow ball is connected to a flow pipe. The end of each flow pipe away from the hollow ball is connected to the main pumping pipe and the main water supply pipe in the form of a branch pipe. The branch pipes are respectively provided with a branch valve. One end of the main pumping pipe is connected to the suction pump inlet, and the main water supply pipe is connected to the water supply source. The surface of the hollow ball is provided with a plurality of flow holes. The hollow ball is conductive and connected to an external DC power supply via a wire. When the hollow ball is connected to the negative electrode via the wire, the hollow ball is connected to the main pumping pipe via the flow pipe.

The invention discloses a power grid grounding simulation method and system based on multi-parameter coupling modeling. The method comprises the following steps: acquiring soil resistivity, lightning stroke current waveform data and morphological structure information of a grounding electrode at different depths and geographic positions; constructing a recursive coupling current equation based on time history feedback, and recursively calculating a local grounding current distribution function at the current moment and at the spatial position by adopting a multi-channel dynamic weighting mechanism based on the recursive coupling current equation; fractal dimensions are dynamically calculated according to the soil resistivity and the morphological structure information of the grounding electrode, and a fractal current distribution function is established based on the fractal dimensions and a local grounding current distribution function; the local current value and the fractal current distribution function are fused, the total grounding current is dynamically calculated in a time integration mode, and step voltage is calculated in combination with a current response function, the soil resistivity and the lightning stroke waveform; and determining the state of the grid grounding system based on the total grounding current and the step voltage.

The invention relates to the field of substation monitoring, in particular to a system for monitoring the state of a substation grounding grid. The system comprises a multi-source data acquisition module, a relay polling unit and a control unit. The multi-source data acquisition module monitors the backflow condition, the electrical integrity, the grounding resistance value of an earth screen, the soil resistivity, the contact voltage, the step voltage data, the corrosion rate of the earth screen, the corrosion amount and the soil PH value; the relay polling unit comprises a relay input control module and a relay output control module, and the relay output control module drives multiple relays to switch test loops according to a fixed sequence; the control unit displays the backflow condition, the electrical integrity, the earth screen grounding resistance value, the soil resistivity, the contact voltage, the step voltage data and the alarm information in real time, displays the earth screen corrosion rate, the corrosion amount and the soil PH value, and is integrated with a central processing unit. The state of the transformer substation grounding grid can be comprehensively and intelligently monitored in real time, and the abnormal trend can be analyzed and early warned.

The invention discloses a voltage test curve determination method and device, terminal equipment and a building site selection safety judgment method based on a voltage test curve, and belongs to the field of electrical engineering. The method comprises the following steps: obtaining structural parameters of a test building, structural parameters of a grounding grid around the test building and soil resistivity of soil where the grounding grid around the test building is located; constructing a simulation model according to the structural parameters and the soil resistivity; external excitation is applied to the simulation model, so that the simulation model to which the external excitation is applied simulates to obtain voltage values of a preset reference earth surface point under different test parameter combinations; and according to the voltage value and the test parameter combination corresponding to the voltage value, fitting to obtain a voltage test curve for representing the change of the voltage along with the test parameters. By implementing the application, the problem that the area voltage distribution rule of the building land occupation, the building and the surrounding grounding grid layout is not clear in the prior art can be solved.

The invention discloses a method for predicting and evaluating corrosion fatigue residual life of an oil pipeline, and belongs to the technical field of structural integrity management and safety engineering of oil and gas conveying pipelines. Comprising the following steps: acquiring pipeline corrosion defect original data, carrying out defect merging and identification to obtain a defect sample set, selecting a target defect sample, and obtaining the defect depth of the target defect sample at the detection moment; based on the defect sample set, statistical modeling is carried out on the corrosion defect depth, the maximum defect depth in a preset service period is obtained through prediction, and safety margin evaluation is carried out; constructing an electrochemical corrosion life model fused with a temperature-soil resistivity correction factor to predict the residual life; and carrying out pipeline residual strength evaluation and decision making by adopting an optimized ASME B31G standard and an SY / T 6151 standard. According to the method, all links are seamlessly connected, a complete solution from theory to practice and from technology to economy is provided, the operation and maintenance cost is effectively reduced, and the pipeline safety management level is improved.

The invention discloses a DC power transmission line lightning stroke risk assessment method and device, terminal equipment and a storage medium, and relates to the field of power transmission lines. The method comprises the following steps: according to historical lightning stroke times, historical rainfall, historical fault times, historical fault indexes calculated by first preset weight coefficients, material operation age limit, large-span and large-height-difference data, lightning protection facility coverage data, power transmission line length, tower span length and power transmission line characteristic indexes calculated by second preset weight coefficients, calculating a power transmission line characteristic index; the method comprises the following steps of: calculating a ground lightning density range, a soil resistivity value, topographic and topographic data, a tower altitude, a climatic environment index calculated by each third preset weight coefficient, a tower inspection frequency, a technician level, lightning protection data, and an operation and maintenance management index calculated by each fourth preset weight coefficient; and determining the lightning stroke risk level of the to-be-assessed line according to the lightning stroke risk assessment coefficient obtained through calculation according to the corresponding fifth weight coefficients. According to the invention, line lightning stroke disaster risk assessment is realized.

The invention discloses a transformer substation differentiated lightning protection grounding evaluation method, system and device and a storage medium. The method comprises the following steps: performing grid division on a region with a lightning protection insulation demand of a transformer substation; obtaining thunder and lightning meteorological data of the transformer substation and the soil resistivity of each grid; acquiring an equipment grounding mode of each grid; and setting weight factors according to the importance of the grid area, the soil resistivity and the equipment grounding mode, calculating to obtain the score of each grid, and judging the lightning protection grounding level of each grid according to the score. Lightning stroke risk points can be identified more accurately, and effective protection measures are taken, so that the lightning protection effect is improved.

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.

The invention provides a tower grounding device which is characterized in that the number of tower bases of a tower is four, the tower bases are arranged in a quadrilateral mode to form a quadrilateral area, the tower grounding device comprises a plurality of claw-shaped grounding electrodes and horizontal grounding wires, and the grounding wires extend outwards by 45 degrees along the tower bases of the tower and are arranged in a radial mode. When a tower is in an area with soil resistivity of more than 2000 ohm meters, the number of the claw-shaped grounding electrodes is four, the number of the horizontal grounding wires is four, the four claw-shaped grounding electrodes are respectively arranged at the tail ends of four epitaxial rays on the grounding wires, and grounding reinforcing materials are laid around the four claw-shaped grounding electrodes. And the periphery of the rectangular frame formed by the four claw-type grounding electrodes is also coated with a grounding reinforcing material. The grounding device is wide in application range and long in service life, the number and the angle of the claw type grounding electrodes and the number of the grounding wires, the grounding reinforcing materials and the electrolytic ion grounding electrodes can be reasonably adjusted according to the soil resistivity, and the impact grounding resistance and the laying difficulty of the grounding device can be effectively reduced.

This invention relates to the field of electromagnetic compatibility technology in power systems, and more particularly to a rail position control and suppression system based on multi-objective optimization. The invention generates a target potential distribution prediction scheme through a potential distribution prediction generation module, which then corrects the scheme using a spatial calibration unit based on real-time train position offset to generate spatial dynamic correction coefficients. The spatial optimization unit then optimizes the scheme based on historical soil resistivity drift data. Simultaneously, a target drainage action timing scheme is generated through a timing scheme generation module, corrected by a timing calibration unit based on real-time rail potential deviation to generate timing dynamic correction coefficients, and then optimized by a timing optimization unit based on historical equipment performance data. Finally, a comprehensive point-based control module achieves coordinated spatial and temporal control.

The application relates to an optimization design method of a grounding resistance of a transmission line tower based on a particle swarm optimization algorithm, which comprises the following steps: based on a control index of a transmission line back strike trip-out rate and an engineering implementation efficiency requirement of tower grounding design, constraint conditions and a target function in the optimization design of the grounding resistance of the transmission line tower are refined; particle swarm optimization algorithm parameters are set, a random initial particle swarm is generated by using the particle swarm optimization algorithm, in an iteration process, the position and speed of the particle swarm are updated according to the historical optimal value of the particle and the historical optimal position of the particle swarm, so that a global optimal solution is searched; and the global optimal solution is converted into soil resistivity grading and a grounding resistance value, which is used as an optimization design scheme of the grounding resistance. The application can guarantee that the grounding resistance value does not need to be designed too small, the cost of the grounding resistance is reduced, the proportion of a local total back strike trip-out rate exceeding the back strike trip-out rate control index is minimum, and the trip-out rate of the transmission line can meet the demand.

This utility model belongs to the field of soil drilling equipment and provides a drilling device for soil resistivity detection. It includes a base, a through groove at one end of the base, and a mounting frame fixedly connected to the upper surface of the base. The mounting frame has a U-shaped structure and contains a mounting column. This utility model mounts a screw rod to a drive motor. Starting the drive motor rotates the screw rod, and starting a first servo motor drives the screw rod to rotate via its output end. The rotation of the screw rod moves a slider within a groove, thus adjusting the height of the mounting column and the screw rod on it. This facilitates soil sampling. Furthermore, the tilt angle of the mounting column can be adjusted via an adjustment component, facilitating sampling of surrounding soil. Compared to existing soil sampling tubes, this device effectively improves the diversity of soil sampling results.

The invention discloses a method for determining cathode protection current demand quantity of a tank bottom plate of a built storage tank, and belongs to the technical field of corrosion protection of storage tanks. According to the technical scheme, the on-off potential of the peripheral area of the storage tank is determined, a geometric model of a storage tank bottom plate is established, and the polarization curve of the storage tank and the soil resistivity around the storage tank are tested; calculating the polarization potential of each storage tank peripheral recording point; then the calculated potential of each recording point is compared with the actually measured power-off potential in sequence, and the final cathode boundary corresponding to the storage tank is obtained by adjusting the coating surface; and calculating the whole potential distribution condition of the tank bottom plate of the storage tank, and determining the cathode protection current demand quantity of the tank bottom plate of the storage tank in combination with the condition of a field feed experiment. The method has the beneficial effects that the cathode protection current demand quantity of the bottom plate of the built storage tank can be accurately determined, the effectiveness of cathode protection design is ensured, the corrosion risk of the outer side of the bottom plate of the storage tank is effectively controlled, and the treatment cost, the environment and other adverse effects caused by corrosion leakage of the storage tank are reduced.

The invention provides an ultra-high voltage transmission line lightning protection simulation calculation method and system. The method comprises the following steps: creating a double-index model of lightning current; the method comprises the following steps: acquiring related data of a wire and a lightning conductor of an ultra-high voltage transmission line and corresponding tower data, and constructing a flashover judgment model of an insulator; calculating a power frequency grounding resistance value based on soil resistivity data measured at the bottom of a related tower in each region; calculating an impact grounding resistance value based on the power frequency grounding resistance value, and creating an impact grounding resistance module according to the relationship between the power frequency grounding resistance value and the impact grounding resistance value; and continuously changing the size of the lightning current of the double-index model, carrying out simulation calculation by using the impulse grounding resistance module, judging whether the insulator flashover occurs according to the flashover judgment model, and determining the amplitude of the lightning current when the line just breaks down. According to the method, errors are reduced, optimization of lightning protection simulation calculation of the power transmission line is facilitated, loss caused by lightning disasters is reduced, and economical efficiency and safety of a power system are improved.

The utility model relates to the technical field of monitoring devices, and discloses an anti-interference grounding resistance on-line monitoring device, which comprises a box body, an inverter power supply unit fixedly mounted at one end of one side in the box body, a test control unit fixedly mounted in the middle of one side in the box body, and a matched resistance unit fixedly mounted at the other end of one side in the box body, the other end of one side in the box body is fixedly provided with the adaptive power supply unit, and the middle part of the other side in the box body is fixedly provided with the high-frequency transformation unit, so that the device can be conveniently installed in any indoor and outdoor standard cabinet in the use process through the arranged installation groove; through the arrangement of the inverter power supply unit, the test control unit, the matched resistor unit and the adaptive power supply unit, the device can be used for real-time monitoring of equipment grounding resistance, soil resistivity, step voltage, contact voltage and other parameters of a traction substation and a substation of the same type.

The invention relates to an impact grounding resistance calculation method based on a three-dimensional transmission tower simulation model, and the method comprises the steps: building a three-dimensional transmission line tower model comprising a tower body, a grounding lead and a grounding grid according to the actual structure size, material attribute and burying condition of a 220kV transmission line tower by using CDEGS software; a lightning current excitation source is arranged at the top of the tower, and lightning impulses with different amplitudes, waveforms and action time are simulated; carrying out electromagnetic field simulation calculation by utilizing CDEGS software, drawing a change curve of the impulse grounding resistance along with lightning current amplitude, time and soil resistivity parameters so as to judge a change rule of the impulse grounding resistance, carrying out simulation verification on the optimized three-dimensional transmission line tower model by utilizing the CDEGS software, and if the grounding resistance does not meet a standard value, carrying out electromagnetic field simulation calculation. And if not, continuing to adjust and optimize and repeating the simulation verification process until the grounding resistance meets the standard requirement.

The invention discloses a green grounding method and system for a new energy station. The method comprises the steps of obtaining multi-source grounding parameters such as soil resistivity, station topology, meteorological data and a fault current predicted value; a grounding grid optimization configuration parameter is generated through a dynamic weighted fusion algorithm; constructing a self-adaptive grounding grid structure comprising an adjustable grounding electrode depth module and a variable topology connection module; monitoring the state of the grounding grid in real time and dynamically adjusting; when a ground fault is detected, a green arc extinguishing strategy is started, and the pre-embedded energy storage element and the power electronic device are utilized to actively guide and extinguish the arc. According to the invention, the problems of poor environmental adaptability and poor fault arc extinction effect of the grounding system of the new energy station are solved, and the reliability, safety and intelligent level of the grounding system are significantly improved through dynamic adaptive adjustment and an active arc extinction strategy.

The invention belongs to the technical field of soil sampling, and particularly relates to a soil sampling device for soil resistivity measurement, which comprises an operation platform, a rotating seat and a sampling barrel, a cutting part is arranged at the bottom of the sampling barrel; a cooling cavity is formed in the side wall of the cutting part; a heat exchange cavity is formed in the side wall of the sampling barrel; a group of drainage holes and diversion holes are uniformly distributed between the cooling cavity and the heat exchange cavity; the cooling cavity, the heat exchange cavity, the drainage holes and the flow guide holes are all filled with cooling liquid. A drainage assembly is arranged in the drainage hole; cooling liquid between the cooling cavity and the heat exchange cavity is promoted to be continuously exchanged through the drainage assembly, heat absorbed by the cooling liquid is diluted, and due to the fact that the outer wall of the sampling barrel is in direct contact with an external low-temperature frozen soil layer, high-temperature cooling liquid entering the heat exchange cavity can be cooled through low-temperature soil; and when the formed low-temperature cooling liquid returns to the cooling cavity again, the heat of the cutting part is continuously absorbed, so that the cooling efficiency of the cutting part is improved.

The invention discloses a lightning resistance level calculation method and system based on multi-factor coupling three-dimensional tower simulation, a medium and equipment. In the method, according to the actual size, the structural form, the material attribute and the grounding body connection mode of a power transmission line tower, soil resistivity data obtained through field geological survey are combined; constructing a three-dimensional tower-soil coupling model comprising a tower structure and a multi-layer soil structure; inputting impact grounding resistance data actually measured on site into the three-dimensional tower-soil coupling model; setting a lightning current source with adjustable amplitudes and waveforms in the three-dimensional tower-soil coupling model, simulating lightning current impacts with different amplitudes and waveforms to act on the transmission line tower, and performing electromagnetic field simulation calculation by using CDEGS simulation software to obtain a tower voltage peak value and a grounding current peak value under the action of the lightning current; and calculating the lightning-resistant level of the power transmission line tower according to a lightning-resistant level formula, and adjusting the size, the material or the burial depth of the grounding body.

The invention relates to a prefabricated concrete pole, the part, buried underground, of the prefabricated concrete pole comprises conductive concrete, and the conductive concrete comprises, by mass, 14-18 parts of cement, 22-34 parts of sand, 30-42 parts of gravel, 10-18 parts of water and 12-15 parts of conductive filler; the conductive filler comprises the following components in parts by mass: 20-25 parts of graphite, 5-10 parts of carbon fibers, 50-65 parts of steel slag and 5-15 parts of copper-plated steel fibers; the lightning protection performance is excellent, and the resistivity of soil near the grounding foundation is effectively reduced; the conductive chassis can integrally reduce the resistivity of soil around the lightning protection pole, the grounding foundation does not need to be provided with a radial grounding body, the excavation area needed by construction is greatly reduced, and the construction cost can be reduced by 30%. Compared with a traditional steel grounding body, the conductive concrete is made of graphite, steel slag, carbon fibers, copper-plated steel fibers and other materials, the service life of the electric pole can be greatly prolonged due to the excellent mechanical property and corrosion resistance of the conductive concrete, and the follow-up maintenance cost is reduced.

The application discloses a kind of ground electrode in time domain finite difference simulation soil ionization effect characterization method, including obtaining the geometry of the ground electrode to be characterized, soil characteristics, environment and excitation source parameters, construct electrode in FTDT simulation model;The model is meshed, the absorption boundary condition and simulation total length are determined and initialized;Current density and electric field intensity around electrode are calculated, and soil resistivity is updated;The total resistance of electrode under the distribution of current soil resistivity is calculated, and the equivalent radius of electrode is calculated correspondingly;The correction factor of time domain finite difference is calculated using the equivalent radius of electrode, and then the vertical electric field component parameter of electrode is corrected;When the current simulation length reaches the simulation total length, the ground electrode top voltage, resistance, equivalent radius characterizing soil ionization effect are output;Method can accurately characterize soil ionization effect under coarse grid, greatly improve the calculation efficiency.

The invention discloses a grounding device and a grounding method of a conductive concrete tower, and belongs to the technical field of power transmission line grounding. The grounding device of the conductive concrete tower comprises a lightning conductor, a conductive concrete column, a reference electrode, a grounding unit, a calibration unit, a first processing unit, a detection unit, a second processing unit, a first compensation unit, a second compensation unit, a control unit and a data analysis unit. The first compensation resistance can be provided according to the current column combined resistance, the first compensation resistance is connected with the initial basic grounding resistance in parallel, the comprehensive grounding resistance of the main loop is reduced, and the high-voltage current of the lightning conductor is smoothly guided to the earth soil layer. And meanwhile, a current diffusion parameter is calculated according to the soil resistivity and the column combination resistance, a second compensation resistor is provided according to the current current diffusion parameter and the voltage fluctuation probability, the second compensation resistor increases the comprehensive grounding resistance of the main loop, and charge accumulation caused by too low comprehensive grounding resistance due to the current diffusion effect is avoided.

The embodiment of the invention discloses a method, a device, a system, equipment, a medium and a product for determining the damage degree of a pipeline anti-corrosion layer, and the method comprises the steps: collecting the current values of three collection points of the pipeline anti-corrosion layer of a pipeline after a current transmitter transmits a current to the pipeline, including a damage point and a measurement point between the current transmitter and the damage point, measuring points between the two; according to the current values of the three points, determining the first conductivity of the pipeline anti-corrosion layer of the measured pipeline, calculating the average conductivity, and correcting the average conductivity according to the standard soil resistivity to obtain the corrected conductivity; and determining the damage degree of the first acquisition point according to the corrected conductivity. According to the technical scheme, the problem that the damage degree of the pipeline anticorrosive coating cannot be accurately determined at present is solved, the damage degree of the pipeline anticorrosive coating is determined by calculating the conductivity of the anticorrosive coating, the conductivity of the anticorrosive coating is related to multi-dimensional anticorrosive coating factors, and the efficiency and accuracy of determining the damage degree of the pipeline anticorrosive coating are improved.