95 results about "Electric conductance" patented technology

The invention discloses a grounding grid electric heating power multi-field coupling modeling method and system considering soil nonlinear breakdown, and belongs to the technical field of power system grounding grids. The method comprises the following steps: establishing a three-dimensional geometric model containing a soil domain and a grounding grid conductor; defining non-linear conductivity characteristics of the soil; setting multi-physical field parameters and corresponding boundary conditions of the three-dimensional geometric model; and establishing a multi-physical field coupling control equation set including an electric field equation, a heat conduction equation and a thermal stress equation, and solving by adopting a finite element method to obtain three-dimensional space distribution data of the grounding grid under lightning current impact. According to the invention, on the basis of fully considering the nonlinear breakdown characteristic of the soil, the accurate simulation of the electric heating power multi-physical field behavior of the grounding grid under the impact current effect is realized, and the accuracy of impact impedance, potential distribution and temperature rise prediction is obviously improved.

The invention provides a brain deep electrical stimulation electrode parameter determination method and related equipment, and the method comprises the steps: building a head simulation model which comprises conductivity distribution; determining one or more target stimulation target spots and one or more non-target inhibition areas on the head simulation model; based on one or more target stimulation target spots and one or more non-target inhibition areas, multiple groups of electrode configuration schemes are determined through an electrode positioning method, each group of electrode configuration scheme is configured on the head simulation model, and multiple groups of stimulation simulation models are obtained; performing finite element solution based on the anatomical structure and the conductivity distribution of each group of stimulation simulation models, and optimizing the electric field intensity of one or more target stimulation target spots and the electric field intensity of one or more non-target suppression regions to obtain a plurality of electrode parameters; and determining a target electrode parameter in the plurality of electrode parameters, and taking an electrode configuration scheme corresponding to the target electrode parameter as a target electrode configuration scheme.

Systems and methods are provided for modeling and for providing a graphical representation of tissue heating and electric field distributions for medical treatment devices that apply electrical treatment energy through one or a plurality of electrodes. In embodiments, methods comprise: providing one or more parameters of a treatment protocol for delivering one or more electrical pulses to tissue through a plurality of electrodes; modeling electric and heat distribution in the tissue based on the parameters; and displaying a graphical representation of the modeled electric and heat distribution. In another embodiment, a treatment planning module is adapted to generate an estimated target ablation zone based on a combination of one or more parameters for an irreversible electroporation protocol and one or more tissue-specific conductivity parameters.

The invention relates to the technical field of soil physical parameter in-situ measurement, and discloses a soil layer natural water content portable intelligent measuring instrument based on multi-source sensing fusion, which comprises a composite probe assembly and an intelligent measurement and control host which are physically connected, the composite probe assembly is configured to be inserted into a soil layer to be tested to construct a multi-physical field test environment, and an electrical transceiving unit and an acoustic transceiving unit are integrated in the composite probe assembly. By constructing a cross physical field excitation and multiphase parameter collaborative decoupling mechanism, a multidimensional dynamic correlation model is established by using the thermosensitive drift characteristic of the sound velocity of a mixed medium during thermal disturbance and the transient step response of a dielectric constant under an acoustic radiation force field; the problems that the coupling influence of the water content and the volume weight cannot be distinguished and the conductivity of bound water and the conductivity of free water are difficult to separate in a traditional means are effectively solved, and four independent physical quantities including the volumetric water content, the in-situ dry volume weight, the bound water content and the actual conductivity of pore water are synchronously inverted through a single probe. And the decoupling precision of the equipment on complex multi-phase soil medium parameters is improved.

The invention relates to the field of grounding technology and electrical measurement, and discloses a grounding electrode current diffusion characteristic and environment correlation analysis method, which comprises the following steps: acquiring a ground electricity state vector representing soil electrochemical characteristics; constructing and calibrating a state phase space evolution model for describing time-space evolution of the vector; an adaptive dynamic analysis closed loop is executed, a state vector at the next moment and uncertainty are predicted through the model, an adaptive sensing protocol is generated based on the uncertainty to guide new data collection, a prediction result is corrected through new data, and a corrected state vector is obtained; and finally, based on the continuous corrected state vector, analyzing the causal association between the environment and the state, reconstructing three-dimensional complex conductivity distribution, and determining current diffusion characteristics such as grounding impedance through numerical calculation. According to the method, the limitation of static evaluation in the prior art is solved, and the dynamic prediction of the performance of the grounding system and the physical tracing of the abnormal cause are realized.

The invention discloses a dam anti-seepage body integrity detection method based on an artificial power supply. Comprising the following steps: injecting a broadband excitation current signal into a dam anti-seepage body through a multi-frequency program control constant current source; a modular distributed electrode array is adopted to collect and obtain voltage data of the surface of the dam anti-seepage body in real time; high signal-to-noise ratio voltage data is obtained by adopting filtering processing and a digital phase-locked amplification technology; carrying out three-dimensional inversion calculation by adopting an improved electrical impedance tomography algorithm, and reconstructing an internal conductivity distribution image of the dam anti-seepage body; analyzing, identifying and positioning defects through a deep learning model; and constructing an electro-seepage coupling inversion model, converting the internal conductivity distribution image based on the dam anti-seepage body into permeability coefficient distribution, and generating an integrity evaluation report of the dam anti-seepage body. Compared with a traditional detection method, the method is high in detection precision, wide in application range and high in detection efficiency, and a brand new technical means is provided for evaluating the health state of the dam seepage-proofing body.

This invention relates to the field of machine learning technology, and particularly to a machine learning control method for LIG laser-induced high thermal conductivity and high electrical conductivity performance. The method includes calculating the contribution weights of processing parameters to dual performance characteristics, identifying key dominant and auxiliary parameters, and generating a training dataset for both performance characteristics. Two machine learning models are trained separately to obtain initial core hyperparameters for the two prediction models, and then the core hyperparameters are tuned. The two prediction models process candidate datasets respectively, outputting thermal conductivity and electrical conductivity prediction sets, and a comprehensive evaluation is performed to obtain recommended laser processing parameters. The contribution weights of key related laser processing parameters are updated based on a comparison between the target dual performance characteristics and the measured dual performance characteristics. The recommended laser processing parameters are then trained and updated again. By training the dual performance relationship model using the contribution weights of processing parameters and optimizing hyperparameters from multiple aspects, global collaborative optimization is achieved, enabling rapid and accurate prediction of the dual performance characteristics of LIG thermal conductivity and electrical conductivity.

This invention discloses a method for predicting the dynamic conductivity of biological tissues considering the pulse dispersion effect. The method includes: constructing a two-dimensional dual-needle electrode geometric finite element model, setting boundary conditions and initial treatment parameters; introducing a Debye function into the finite element model to characterize the change of tissue dielectric constant with frequency; performing frequency domain analysis on the applied pulse signal and converting the Debye function from the frequency domain to the time domain, allowing the polarization vector to couple with the electric field to participate in transient solutions, thereby obtaining a voltage and current dataset including the effect of pulse dispersion; constructing a tissue dynamic conductivity prediction model and training the prediction model using the voltage and current dataset; inputting the voltage and current response data of the tissue to be determined into the trained model to obtain the tissue dynamic conductivity prediction result. This invention can improve the consistency between the finite element current calculation results and the actual tissue electrical response, and improve the accuracy of tissue dynamic conductivity prediction. It is applicable to dynamic conductivity prediction in electroporation therapy, providing a reference for electroporation therapy.

Methods include functionalizing, into a compressible pressure varying electrical conductance device, a portion of a compressible nonwoven material (CNM) cushion. A process includes forming within a three-dimensional (3D) target region of the CNM cushion a columnar distribution of non-solidified conductive polymer, and converting the columnar distribution of non-solidified conductive polymer into a columnar compressible pressure varying electrical conductance structure. The columnar distribution of non-solidified conductive polymer extends along a column axis. Forming the columnar distribution includes injecting into at least a portion of the 3D target region a liquid carrying conductive polymer in suspension. The columnar compressible pressure varying electrical conductance structure includes mutually separated masses of solidified conductive polymer respectively supported by mutually separated flexible fibers of the compressible nonwoven material. Optionally, forming the columnar distribution of non-solidified conductive polymer includes a first injection followed by partial drying, and a second injection.

This invention belongs to the field of plant seedling technology, specifically relating to a method for improving the survival rate of Forsythia suspensa cuttings. Specifically, fruiting mother trees are selected, and semi-lignified branches of the current year are collected as cuttings, retaining plump buds. The cuttings are soaked in a rooting agent compound solution and then dried for later use. The treated cuttings are then inserted into a gradient substrate and thoroughly watered after planting. The stomatal conductance of the cutting leaves and the electrical conductivity at the base of the cuttings are monitored in real time. The substrate temperature, spraying frequency, shading rate, and ventilation are adaptively adjusted in a closed-loop manner according to the physiological thresholds of different rooting stages of Forsythia suspensa cuttings. Stress-resistant fertilizer is applied according to the physiological state of the cuttings, and disease control and daily management are carried out. This method improves the survival rate of Forsythia suspensa cuttings, reduces the rate of cutting rot, exhibits strong environmental adaptability, and high seedling stability.

The invention relates to the technical field of high-voltage direct-current cables, in particular to a load circulation system of a high-voltage direct-current cable system and an operation method, and the system comprises a temperature circulation module which comprises a PID temperature control unit and a conductor heating unit, and the conductor heating unit is electrically connected with the PID temperature control unit; the multi-polarity voltage loading unit is provided with a high-voltage source, and the high-voltage source can output voltage from the negative polarity to the positive polarity; and the distributed electric field sensor is embedded at the interface of the cable accessory stress cone and the insulation, and the distributed electric field sensor is in contact with the surface of the cable accessory stress cone. The method has the beneficial effects that the tangential electric field distribution at the cable accessory stress cone and the insulation interface is monitored in real time through the distributed electric field sensor, and the maximum electric field intensity is reduced in combination with the low ripple design of the multi-polarity voltage loading unit and the design of the interface conductivity matching layer, so that the electric field distortion and the surface discharge risk are effectively inhibited, and the reliability of the cable accessory is improved. And the operation stability of the high-voltage direct-current cable system under complex working conditions is improved.

The invention provides an oxidation stability evaluation method, detection equipment and a detection method for agent-free transformer oil, and belongs to the technical field of power grid power transmission and transformation. According to the method, copper wires are added into the agent-free transformer oil, air is introduced into the agent-free transformer oil at a preset experimental temperature in a preset experimental period, oxidation of the agent-free transformer oil is accelerated, and the conductivity value of volatile acid in the oil oxidation process is continuously monitored; and evaluating the oxidation stability of the transformer oil without the additive according to the conductivity value of the volatile acid in the preset experimental period. According to the method, the oxidation stability evaluation efficiency of the agent-free transformer oil is improved, the working intensity and technical requirements of operators are reduced, and the cost is reduced.

The invention discloses an aluminum alloy cable accessory conductor material with high thermal cycle performance and a preparation method thereof, and relates to the technical field of aluminum alloy conductor materials. The conductor material comprises the following components in percentage by mass: 0.5-1.5% of Si, 0.05-0.15% of Mg, 0.07-0.08% of Fe, 0.05-0.1% of Cu and the balance of Al and inevitable impurities, wherein the mass ratio of Si to Mg is controlled to be (10-30): 1; through component optimization and process innovation, the relation between the conductivity and the thermal cycle performance of a conductor material is effectively balanced, the thermal cycle performance of the material is remarkably improved, the use requirement of a power transmission conductor in a specific environment is met, and in 1000 times of thermal cycle tests carried out according to the GB / T 9327-2008 standard, the excellent resistance stability is shown, and the thermal cycle performance of the conductor material is greatly improved. The resistance ratio variation D is less than or equal to 0.10, the average dispersion beta is less than or equal to 0.25, and the conductivity is more than or equal to 62% IACS, so that the composite material is particularly suitable for cable connection fittings with strict requirements on long-term electrical connection stability.

The application belongs to the field of hypersonic active flow control, and discloses a drag reduction and heat protection system and method for a hypersonic aircraft. The method combines energy deposition and magnetic fluid flow control. Energy deposition has excellent drag reduction characteristics, which can bring good drag reduction effect to the aircraft. Meanwhile, energy deposition can be used as auxiliary ionization technology to improve the magnetic control effect of magnetic fluid flow control by improving the electrical conductivity of the fluid. Magnetic fluid flow control has outstanding heat protection performance, which can bring excellent heat protection effect to the aircraft after dealing with the heat flow growth caused by energy deposition. Meanwhile, the Lorentz force of the magnetic field fully suppresses the resistance impact and shock caused by pulse energy deposition. The method can achieve better hypersonic drag reduction and heat protection effect, effectively reduce the resistance of the hypersonic aircraft and improve the heat protection ability of the aircraft, and has wide application prospect.

The invention relates to a method for determining an electrical conductivity value. The invention relates to a method for determining an electrical conductivity value of a measuring medium by means of an electrical conductivity sensor (1), wherein the method comprises the following steps: providing an electrical conductivity sensor (1) having at least one transmitting unit (2), at least one receiving unit (3) and a control unit (4) having a storage module (5), transmitting a stimulus signal into the measuring medium at the transmitting unit by means of the control unit, receiving a detection signal at the receiving unit, determining a signal quality indicator on the basis of the detection signal by means of the control unit, determining an electrical conductivity signal corresponding to the detection signal, storing the electrical conductivity signal, determining a dynamic factor on the basis of the electrical conductivity signal by means of the control unit, filtering the electrical conductivity signal by means of a filtering function depending on the determined signal quality indicator (SI) and the dynamic factor, outputting a filtered measurement value of the filtered electrical conductivity signal.

The invention relates to a method, a device and equipment for determining the electrical tortuosity of a reservoir core and a storage medium, and belongs to the technical field of resistivity or conductivity measurement. Based on the microstructure image and fractal theory modeling, pore structure parameters are generated; constructing a digital core model based on the pore structure parameters, and generating pore distribution of the digital core model through a three-dimensional reconstruction technology; finite element electrical conduction simulation is executed based on the pore distribution of the digital core model to calculate electric field distribution and generate electrical parameters, and the electrical parameters are used for determining the electrical tortuosity; the finite element electrical conduction simulation refers to discretizing a continuous electric field into a finite element grid, and solving an electrostatic field equation to simulate current distribution; according to the method, high-precision digital characterization of the heterogeneity of the pore structure of the reservoir core is realized, and the electric tortuosity reflecting the conductivity of the pore structure is accurately calculated.

A coolant drain system for an ion filter can prevent a reduction in the filtration performance of an ion exchange resin and improve its service life. The coolant drain system is operated such that when the electrical conductivity of the coolant circulating through a fuel cell stack is equal to or greater than a predetermined level, the coolant circulates through the interior of the ion filter in such a way that metal ions from the coolant can be easily removed by the ion exchange resin. When the electrical conductivity of the coolant decreases to a level below the predetermined threshold, the coolant remaining in the ion filter is drained to a pressure vessel using the pressure of the air supplied from the pressure vessel.

The invention discloses a numerical simulation method, device, equipment and medium for surface charges of an epoxy core in a direct-current gas insulation sleeve, and relates to the field of electrical equipment insulation design, and the method comprises the steps: determining a conductivity tensor based on a pre-prepared epoxy core sample; constructing a target geometric model of the direct-current gas insulation sleeve based on the geometric parameters and the working environment information of the direct-current gas insulation sleeve and the parameter information of the aluminum foil in the epoxy core body; based on the conductivity tensor and the physical process of charge accumulation on the surface of the epoxy core body, constructing an electric-thermal-wet multi-physical field coupled target simulation model; and performing grid encryption processing on the target geometric model, and based on the processed model, a preset finite element solver and the target simulation model, determining a surface charge numerical simulation result so as to utilize the simulation result to complete insulating sleeve design operation. According to the invention, the charge accumulation rule on the surface of the epoxy core body in the direct-current gas insulation sleeve under different working conditions can be accurately output, and the operation reliability of related equipment is improved.

This invention discloses a method for dynamic modeling of the temperature field and prediction of overheating risk in cable connectors, relating to the field of electrical equipment condition monitoring and thermal management technology. The method includes constructing the connector's geometric domain and establishing a fully coupled electro-magnetic-thermal-mechanical initial value model containing Lorentz force correction terms and eddy current loss heat source terms; jointly assembling the Lorentz force and eddy current loss terms to form a magneto-thermal coupling correction matrix, calculating the equivalent heat source field of a strong magnetic field; solving the temperature field and updating the conductivity and permeability distributions in reverse, forming a bidirectional coupled iterative loop until a converged temperature field is output; extracting hot spot trajectories and temperature gradient vector fields based on the converged temperature field, inputting them into the thermal aging kinetic model of the insulation material to generate a multidimensional indicator surface for overheating risk, determining the risk level and outputting a warning signal. This invention improves the accuracy of connector temperature field prediction and the reliability of overheating risk warning under strong magnetic field environments through bidirectional coupled iterative correction and fully coupled modeling.

The invention discloses an organic light-emitting diode with a doped crystalline thin film as a hole and electron transport layer and a preparation method thereof, and the organic light-emitting diode comprises a substrate (1), an anode (2), an induction layer (4), the hole transport layer (5), a light-emitting layer (7), the electron transport layer (9) and a cathode (11) from bottom to top in sequence. Wherein the induction layer (4) is an organic semiconductor film with a crystalline structure; the hole transport layer (5) and / or the electron transport layer (9) comprises a thin film with a crystalline structure and a dopant; an epitaxial relationship and / or an orientation relationship exists between crystal lattices of the crystalline-structure film in the hole transport layer (5) and crystal lattices of the crystalline-structure organic semiconductor film in the induction layer (4). Compared with the prior art, the conductivity of the film is further improved, the resistance of the device is reduced, and the power consumption of the device under the same brightness is reduced.

The invention discloses an optimization method of a graphene nanobelt edge structure, and belongs to the technical field of material preparation. Joule heat generated by bias voltage is used for driving edge atom migration and interlayer sublimation, in single-layer GNR treatment, edge recrystallization is achieved through constant bias voltage, the edge structure is improved, and a foundation is laid for subsequent conductivity optimization and width reduction; the step bias strategy further regulates the width and the conductivity in a coordinated mode, the performance is gradually improved by accurately controlling the change and the holding time of the bias, and a new thought is provided for preparation of high-performance nano electronic devices.

A method for electrochemical disinfection of an aqueous solution, the method comprising the steps of: providing one or more disinfecting cells for retaining an aqueous solution, each disinfecting cell including one or more electrode pairs positioned therein; arranging the one or more disinfecting cells along a flow path, the flow path including an inlet to and an outlet from the one or more disinfecting cells; determining at the one or more disinfecting cells the electrical conductivity, or specific conductance of the aqueous solution; determining from the electrical conductivity, or specific conductance of the aqueous solution a voltage to apply across the one or more electrode pairs at a current sufficient to produce disinfection species therein; and passing the current from the one or more electrode pairs to the aqueous solution to produce a modified aqueous solution.

The application discloses a power distribution line single-phase tree contact grounding fault risk assessment method and system, and the method comprises the following steps: a fractal tree network model is used to simplify and simulate the real shape of a tree to build a tree model; the initial moisture content of the tree model is obtained, and the temperature and transition resistance of the tree model are continuously monitored; a single-phase tree contact fault model is built, a conductor phase voltage is obtained, the current heat production, heat dissipation and heat absorption of the tree are continuously calculated, the water evaporation quality is calculated and obtained, and the moisture content of the tree is updated using the water evaporation quality; the binary relationship between the conductivity, moisture content and temperature of the tree model is fitted and obtained; the binary relationship is applied to the iterative calculation of the fault model to obtain the highest temperature of the tree in the whole process; and the risk level of the tree is assessed according to the highest temperature by taking a set temperature threshold value. The application can accurately realize the fire risk assessment of the size of the tree, and is helpful to the safe operation of the power grid and the protection of the ecological environment.

The utility model discloses a special alternating current resistance box for detecting a conductivity meter, which relates to the technical field of alternating current resistance boxes and comprises a resistance box main body, wiring grooves are arranged on the back of the resistance box main body at equal intervals, a wiring mechanism is arranged on the outer side of the resistance box main body, and the wiring mechanism comprises a bearing assembly and a pressing assembly. The bearing assembly and the pressing assembly are used in cooperation, the bearing assembly comprises rotating shafts, the rotating shafts are symmetrically and rotatably connected to the outer side of the resistance box body, and rotating ends are fixedly connected to the outer sides of the two rotating shafts. According to the alternating-current resistance box special for detecting the conductivity meter, due to the arrangement of the ground wiring mechanism, it can be ensured that electric wires are arranged in the wire grooves of the bearing columns in order, the electric wires are kept stable and prevented from loosening or falling off through the tension of the tension springs, the situation that the electric wires are not attached due to the toughness of the electric wires is avoided, the structure is simple, and the practicability is high. And the practicability is high.

The invention relates to a wireless charging module, a mobile terminal, wireless charging equipment and a wireless charging system. The wireless charging module comprises a wireless charging coil, a magnetic attraction piece and a conductive piece. The magnetic attraction piece is arranged on the periphery of the wireless charging coil in a surrounding mode. The conductive piece is arranged on one side of the wireless charging coil, and the conductivity of the conductive piece is larger than that of the magnetic attraction piece. According to the wireless charging module, the charging efficiency of the wireless charging module is improved, the situation that the quality factor of the wireless charging module is too low due to the arrangement of the magnetic attraction part, and consequently the foreign matter recognition function is misjudged is avoided, and meanwhile the structural reliability of the wireless charging module is improved.

To accurately measure the dielectric properties of dielectric materials and the conductivity of conductors that make up a wiring board. [Solution] The resonator comprises a pair of conductor layers, a plate-shaped dielectric located between the pair of conductor layers, and a plurality of first via conductors and a plurality of second via conductors extending within the dielectric in a direction intersecting the conductor layers. In a plan view, each of the plurality of first via conductors is located at a predetermined interval on the outer periphery of a predetermined region. In a plan view, each of the plurality of second via conductors is located inside the predetermined region. Each of the plurality of first via conductors is mechanically connected to each of the pair of conductor layers. The dielectric is located between each of the plurality of second via conductors and each of the pair of conductor layers.

The invention discloses a skin tumor three-dimensional electrical impedance tomography method and device and a storage medium. The method comprises the following steps: acquiring a skin surface boundary voltage signal by using a planar electrode, and generating a space virtual electrode equivalent voltage through nonlinear mapping from a planar electrode domain to a space virtual electrode domain; mapping the voltage into a two-dimensional voltage feature map through bilinear interpolation, inputting the feature as prior information into a three-dimensional electrical impedance imaging reconstruction network, and performing depth matching inversion on the body area conductivity distribution based on a sliding window SwinUNet network to obtain a three-dimensional conductivity image; constructing a skin tissue finite element model, and generating a simulation data set; and training nonlinear mapping by adopting the simulation data set and verifying the depth matching inversion performance. The method can still keep stable reconstruction quality under uncertain conditions such as poor electrode contact, channel loss and skin structure change, has high robustness and adaptability, and has good clinical application value.

The invention relates to a converter valve cooling water system corrosion and scaling combined simulation test method and device. The method comprises the following steps: building a closed circulation loop; raising the water temperature to 24-26 DEG C by using a tubular heater; adjusting the concentration and conductivity of scaling ions in a closed circulation loop to realize an acid-base environment for accelerated simulation of the scaling process, and adjusting the concentration of aluminum ions in initial circulating water to 2.5 mg.L <-1 > when the conductivity is adjusted to be lower than 0.5 mu S.cm <-1 >; applying a high-voltage direct-current voltage, and establishing an electric field through a voltage-sharing electrode; continuously operating for at least 336 hours, and regularly detecting water quality parameters through the sampling measurement pool; and after the test is finished, taking out the voltage-sharing electrode, analyzing the scaling morphology and components on the surface of the voltage-sharing electrode, and evaluating the scaling characteristics under different water quality conditions. Compared with the prior art, the device has the advantages of accurately simulating the multi-field coupling operation environment of the water cooling system in the flexible direct current converter valve, realizing accurate analysis of the scaling characteristics of the converter valve and the like.

A well plate stimulator includes a lid configured to be coupled to a well plate comprising a plurality of wells. The well plate stimulator also includes a plurality of pairs of well conductors. Each of the pairs is configured to be inserted into a different one of the wells in the well plate when the well plate stimulator is coupled to the well plate. Each of the pairs includes a first well conductor that is coupled to a first wire and a second well conductor that is coupled to a second wire. Positive and negative portions of a signal generate an electrical current between the first and second well conductors in each pair to stimulate cells within the wells. The well conductors have an electrical conductivity that is greater than about 8×106 S / m.

The invention discloses a simulation system and method for a medium-voltage cable, and particularly relates to the field of cable performance experiments. The device comprises an electric heating bidirectional coupling unit, and the electric heating bidirectional coupling unit comprises an electric field module which loads corresponding excitation current into a cable model according to different simulation working conditions, and a conductor in the cable model generates Joule heat; and the solid heat transfer module takes the Joule heat as a heat source, the electric field module and the solid heat transfer module are combined to obtain the temperature distribution of the cable, at the moment t, the temperature change generates new conductivity, and the new conductivity is fed back to the electric field module. The problems of high cost, difficulty in data acquisition, high safety risk, insufficient dynamic detection capability and the like in the existing medium-voltage cable thermal performance test are solved.