53 results about "Electrical resistance meter" patented technology

The invention discloses an electric energy quality loss test method, system and device and a medium. The method comprises the following steps: acquiring three-phase voltage data and three-phase current data; calculating the equivalent total loss power in the power distribution network line through the apparent power value, the voltage and the resistance based on the collected voltage and current data; and based on the equivalent total loss power, in combination with the power factors of different line losses, carrying out line loss subentry decoupling to obtain additional line losses caused by different electric energy quality problems. According to the invention, extra loss of the line caused by electric energy quality can be accurately measured, and line resistance does not need to be measured.

The invention belongs to the technical field of glass industry, and relates to a method for calculating distribution of electrical parameters of molten glass in an advanced-generation substrate glass gas-electric kiln. Comprising the following steps: setting process boundary conditions of kiln operation; simulating an operation state of the kiln under a set boundary condition by adopting simulation software, equally dividing molten glass in the kiln into a plurality of layers along a vertical height direction, and acquiring temperature distribution data of each layer; based on the temperature distribution data of each layer, determining the resistivity corresponding to each layer of molten glass according to a temperature-resistivity fitting relationship; calculating the resistance of each layer of molten glass based on the resistivity corresponding to each layer of molten glass and in combination with the electrode spacing and sectional area corresponding to each layer of molten glass; and constructing each layer of molten glass into a parallel circuit model, and calculating the current and power of each layer of molten glass according to the loading voltage and resistance. According to the method, accurate quantification and optimal control of the electric heating parameters of the molten glass in the kiln are realized, and the method is suitable for production process optimization of high-generation large-size substrate glass.

The invention relates to the technical field of fire sensing, and discloses an electrical fire state sensing system and method for a low-voltage distribution line, and the method comprises the steps: setting a first monitoring point at a wire inlet end of a distribution loop, setting a second monitoring point at a load access end, setting a differential protection region, and calculating a first on-resistance; performing moving average processing on the first on-resistance to obtain a second on-resistance, calculating a first reference on-resistance according to the second on-resistance, and performing temperature correction on the first reference on-resistance to obtain a second reference on-resistance; according to the method, the on-resistance deviation rate, the on-resistance growth rate and the on-resistance fluctuation coefficient are calculated, whether the on-resistance is in an early warning state, an alarm state or a dangerous state is judged, the on-resistance of the section is calculated in real time according to the ratio of the differential voltage drop to the current, and the technical problem that a fault section cannot be accurately positioned through traditional whole-line monitoring is solved.

A resistance calculation device includes: a characteristic calculation portion configured to calculate a shrinkage rate for each single electrode based on a capacity shift amount of a positive electrode of a deteriorated secondary battery, a capacity shift amount of a negative electrode of the deteriorated secondary battery, a deterioration amount of the positive electrode, and a deterioration amount of the negative electrode, and to calculate a curve representing characteristics of a state of charge and an open circuit voltage of an equivalent circuit of the deteriorated secondary battery by deforming an opening end potential curve for each single electrode before deterioration of the deteriorated secondary battery by the shrinkage rate for each single electrode based on a fixed point; a change amount calculation portion configured to calculate an amount of change in the open circuit voltage of the equivalent circuit based on a difference between the opening end potential curve for each single electrode before the deterioration and the curve representing the characteristics of the state of charge and the open circuit voltage of the equivalent circuit; and a resistance calculation portion configured to calculate a DC resistance of the equivalent circuit by dividing a result of addition of an amount of change in a DC voltage of the equivalent circuit to which a pulse current is applied and the amount of change in the open circuit voltage of the equivalent circuit by a current value when the pulse current is applied to the equivalent circuit.

The application belongs to the technical field of thermal field measurement under high temperature environment, and particularly relates to a high-temperature thermal field direct measurement sensor array. In use, thermal radiation is irradiated on a heat-absorbing layer, the heat-absorbing layer absorbs the thermal radiation and transmits the heat to a high-conductivity micro region, so that a transverse thermoelectric voltage is generated between a first electrode and a second electrode, and the heat flux density at the high-conductivity micro region is calculated according to the transverse thermoelectric voltage; the temperature at the high-conductivity micro region is calculated according to the resistance between a third electrode and a fourth electrode, the heat flux density at the high-conductivity micro region is calibrated through the temperature at the high-conductivity micro region, and the spatial distribution characteristics of the heat flux are inversed by comprehensively considering the heat flux and the temperature at multiple high-conductivity micro regions. The high-temperature thermal field direct measurement sensor array can output the spatial distribution of two modes of heat flux density and temperature, and realize high-precision spatial distribution measurement of the thermal field.

The application discloses a precision hardware fatigue damage detection method and system, and relates to the field of precision mechanical detection.The method comprises the following steps: coupling a flexible impedance sensing array with a precision hardware to be detected; the array substrate is made of polydimethylsiloxane, and the surface array groove is filled with a conductive hydrophilic composite gel formed by in-situ polymerization of acrylamide monomer, sodium alginate and nanometer carbon fibers, thereby forming a plurality of miniaturized impedance units; a constant pressure is applied through a pressure feedback control system, so that the gel produces elastic deformation to cover and compensate the micron-level roughness of the surface of the detection area; a micro-amplitude sinusoidal voltage excitation is applied, current response data in the swept frequency band is collected, complex impedance information is extracted and fitted to a randall equivalent circuit model, and charge transfer resistance and interface capacitance values are obtained; and the parameter deviation degree is calculated according to the charge transfer resistance of the current detection period and historical reference, so as to determine the fatigue damage condition of the local area.

The present application belongs to the field of oil exploitation equipment monitoring, and relates to a sensor-free temperature measurement method and system for a downhole motor of an electric submersible pump, which comprises the following steps: collecting a reference resistance and a reference temperature of a winding of the motor of the electric submersible pump; collecting voltage and current data and working condition parameters of the motor of the electric submersible pump in real time; adaptively selecting a resistance calculation method according to the collected motor working condition parameters to calculate a total loop real-time resistance containing a power cable resistance; calculating a cable resistance component under a current working condition according to well temperature gradient data of the oil well and in combination with power cable parameters; calculating a temperature value of the downhole motor of the electric submersible pump under the current working condition; setting a safe running temperature threshold of the motor of the electric submersible pump, and performing a protection action when the temperature value is detected to exceed a preset threshold. The method has the beneficial effect that sensors and electronic elements do not need to be arranged downhole, and temperature monitoring of the electric submersible pump can be realized only by using the electric submersible pump unit and the power cable, and important reference can also be provided for oil well regulation and control.

The invention discloses a transformer area theoretical line loss calculation method and system, and the method comprises the steps: obtaining the voltage of a user of each phase, the voltage of a low-voltage side of a distribution transformer, and the current of each phase of the low-voltage side of the distribution transformer under the selected target time granularity of a transformer area; based on the voltage of each phase user, each phase voltage of the low-voltage side of the distribution transformer and each phase current of the low-voltage side of the distribution transformer, virtual equivalent resistance of the transformer area under the target time granularity is calculated, and based on each phase current of the low-voltage side of the distribution transformer, a three-phase imbalance correction coefficient is calculated; the theoretical line loss of the transformer area under the target time granularity is calculated based on the three-phase imbalance correction coefficient and the virtual equivalent resistance, complex data difficult to obtain do not need to be depended on, and zero line loss caused by the three-phase imbalance phenomenon existing in the actual transformer area is considered by introducing the three-phase imbalance correction coefficient. The theoretical line loss calculated based on the three-phase imbalance correction coefficient and the virtual equivalent resistance is more accurate and efficient, so that the theoretical line loss calculation efficiency and accuracy are improved.

This invention relates to the field of power electronics, specifically to an online parameter identification model predictive control method for grid-connected inverters: The method involves measuring the grid-side current and voltage at the start of the current switching cycle; applying a control signal to the grid-connected inverter; calculating the reference current for future switching cycles; identifying the real-time inductance and resistance of the line through online parameters; calculating the grid-side current at the start of the next switching cycle based on the real-time inductance and resistance, and compensating for the current prediction error of the predicted grid-side current in the cycle after that; constructing a reserve set of action vectors based on the current error vector quadrant between the compensated reference current for future switching cycles and the grid-side current at the start of the next switching cycle; and selecting the optimal voltage vector from the reserve set according to a value function for use in the next switching cycle. Compared with existing technologies, this invention addresses the shortcomings of fixed parameters, corrects prediction deviations caused by fixed parameters, and achieves more accurate voltage vector selection.

The application discloses a kind of transformer area reactive power compensation capacity determination method, system and voltage out-of-limit management device, it is applied to rural transformer area voltage reactive power compensation, this method includes: obtaining transformer area daytime maximum reverse sending power, nighttime maximum load power and line basic parameters, and maximum voltage threshold, minimum voltage threshold;Line reactance and real-time line resistance are calculated in combination with line basic parameters;By maximum voltage and minimum voltage respectively compared with respective threshold, in combination with transformer area daytime maximum reverse sending power, nighttime maximum load power, line reactance and real-time line resistance, the reactive power compensation capacity of transformer area is calculated.The application is in work, according to transformer area relevant information, capacitor and reactor reactive power compensation capacity calculation is carried out, and relatively accurate reactive power compensation capacity is obtained, then voltage out-of-limit management device capacity is configured, so that reactive power voltage regulating effect can adapt to the actual situation requirement of transformer area, effectively governs transformer area voltage daytime and nighttime bidirectional out-of-limit.

Devices and methods for insulation detection are provided. The device includes a voltage acquisition unit, a calculation unit and at least two resistance units. Each resistance unit is electrically connected to a ground terminal and a target output wire. The voltage acquisition unit acquires a positive bus-to-ground voltage, a negative bus-to-ground voltage and a neutral-to-ground voltage after a target resistance unit connects a path between target output wire and ground terminal. The calculation unit calculates first current corresponding to target output wire based on voltage corresponding to the target output wire and the resistance of the target resistance unit; calculates a positive insulation resistance to ground, a negative insulation resistance to ground and a neutral-wire insulation resistance to ground based on first current, positive bus-to-ground voltage, negative bus-to-ground voltage and neutral-to-ground voltage; and determines whether insulation failure occurs in three-wire HVDC system.

The invention discloses a high-low voltage ride-through control method of a static synchronous phase modifier network following working condition. The method comprises the following steps: 1) calculating related voltage, current, inductance and resistance; 2) calculating parameters of an H-bridge power module; 3) according to a network tracking control strategy, considering high and low voltage ride-through working conditions, and calculating active current and reactive current given values; 4) obtaining a three-phase modulation wave initial value of the upper bridge arm of the static synchronous phase modifier through current decoupling control and voltage feedforward control; 5) obtaining a three-phase modulation wave initial value of the lower bridge arm of the static synchronous phase modifier through current decoupling control and voltage feedforward control; the invention belongs to the technical field of high-voltage and low-voltage ride-through control, stable operation can be kept during high-voltage and low-voltage ride-through, and the phenomena of overcurrent, voltage abrupt change and power oscillation are avoided during high-voltage and low-voltage abrupt change.

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 method and a system for measuring the under-gate electron mobility of a high-electron-mobility transistor, and mainly relates to the technical field of integrated circuit engineering. Comprising the following steps: testing gate-source currents corresponding to different gate-source voltages to obtain a first relational graph; based on the first relation graph, performing linear fitting to obtain gate-source resistance; testing gate-drain currents corresponding to different gate-drain voltages to obtain a second relational graph; based on the second relation graph, performing linear fitting to obtain gate-drain resistance; calculating the total resistance of the channel; and calculating the under-gate electron mobility. The method has the beneficial effects that the interference of parasitic resistance and contact resistance on migration rate extraction is effectively eliminated, and the calculation accuracy is improved.

This application discloses a computing system to identify a first portion of an electrostatic discharge path in a physical design layout describing an electronic device is within at least one electrostatic discharge cell of the electronic device, and to access a library including the at least one electrostatic discharge cells to identify a first resistance corresponding to the first portion of the electrostatic discharge cell. The computing system also can determine a second resistance of a second portion of the electrostatic discharge path, generate a path resistance for the electrostatic discharge path by aggregating the first resistance and the second resistance, and perform an electrostatic discharge design rule check using the path resistance of the electrostatic discharge path and electrostatic discharge design rules.

The application provides a fuel cell water management fault diagnosis method and system. The method comprises the following steps: controlling the on-off of the output current of the fuel cell by using DC / DC, periodically recording the voltage change before and after the current interruption, and processing the step data of the voltage response and the relaxation data of the voltage response; calculating the ohmic resistance according to the step data of the voltage response; calculating the diffusion resistance coefficient according to the relaxation data of the voltage response; judging the dry-wet state inside the fuel cell through the ohmic resistance and the diffusion resistance coefficient; and adjusting the operation parameters in real time according to the dry-wet state inside the fuel cell, so that the fuel cell can keep the best working state. The system comprises a data acquisition unit, an ohmic resistance calculation unit, a diffusion resistance coefficient calculation unit, a dry-wet state judgment unit and a central control unit. The application realizes the real-time feedback of the dry-wet state inside the fuel cell by periodically monitoring the change of the ohmic resistance and the diffusion resistance coefficient inside the fuel cell.

The invention discloses a resistance value testing method, device and system. The method comprises the steps that an initial calculation model is obtained, the initial calculation model can conduct electrical performance simulation on a mechanical part, and the initial calculation model comprises a part with conductivity to be determined; when a probe of the resistance meter is placed at preset positions on the two sides of the electric conductivity to-be-determined part, actually measured resistance parameters of the electric conductivity to-be-determined part of the mechanical part obtained through actual measurement are obtained; and performing simulation in the initial calculation model by adopting a measurement method which is the same as the actual measurement method to obtain a simulation resistance parameter containing a conductivity-to-be-determined part of the mechanical part, and adjusting the material attribute of the conductivity-to-be-determined part of the mechanical part until the difference between the simulation resistance parameter and the actually measured resistance parameter is smaller than a set threshold value, so as to obtain the conductivity-to-be-determined part of the mechanical part. Determining an optimization calculation model; and performing electrical performance simulation on the mechanical part in the optimization calculation model to obtain the resistance value of the to-be-determined part of the conductivity of the mechanical part, thereby improving the accuracy of the resistance value test.

The invention discloses a method for screening micro-damage after welding of a gallium arsenide battery. The method comprises the following steps: step 1, deploying a measurement and control device; 2, initializing the measurement and control device; step 3, circuit state switching; step 4, parallel resistance calculation; 5, damage judgment and shunting; according to the method, detection is synchronously carried out in the pressure maintaining stage after electric resistance welding, no extra production procedure needs to be added, and the problems that the system complexity is improved and the production takt is reduced due to electroluminescence detection are solved; the parallel resistance Rsh of the battery can be accurately measured and calculated within milliseconds, whether the battery is qualified or not can be detected after single welding, unqualified products are prevented from entering a subsequent surface mounting process, the problem of labor hour waste caused by a solar simulator scanning IV curve screening mode is solved, invalid labor hour consumption caused by whole-course welding when the battery is damaged at an early stage is thoroughly avoided, and the production efficiency is improved. And the requirements of an automatic production line can be met, the production cost is reduced, the production efficiency is improved, and the current situation of low yield of thinned batteries and flexible batteries is improved.

The invention discloses a prediction method for an operable domain of a conduction cooling superconducting cavity. The prediction method comprises the following steps: calculating field distribution under a target acceleration gradient according to electromagnetic characteristics of a real airspace of the superconducting cavity; calculating the surface loss power density and the dynamic thermal load under the target acceleration gradient based on the field distribution and the actual surface resistance; reversely calculating the temperature of a secondary cold head according to the total heat load of the superconducting cavity; solving a steady-state temperature field by taking the second-stage cold head temperature as a thermal boundary condition of a cold head mounting position to obtain temperature distribution of the cavity surface; updating parameters according to the temperature distribution until heat balance; constructing a constraint set according to the steady-state temperature field; inputting the measurement data of the superconducting cavity into the prediction model, and predicting the margin of each steady-state temperature point; correcting the prediction model according to the deviation between the prediction margin and the actual measurement margin to obtain an online prediction model; and inputting the operation data into an online prediction model to calculate the margin of each steady-state temperature point, predicting the operable region of the conduction cooling superconducting cavity and giving an action suggestion.

The invention provides a cable alternating current resistance measuring method and device and electronic equipment, and relates to the technical field of electric power measurement. The method comprises the steps that a current sampling signal and a voltage sampling signal of a cable are obtained, the current sampling signal is obtained by connecting a sampling resistor in series on the secondary side of a current transformer and measuring the voltage drop of the sampling resistor, and the voltage sampling signal is obtained by symmetrically arranging sampling points at the two ends of the cable and synchronously collecting the two ends; converting the current sampling signal and the voltage sampling signal into digital signal flows, wherein the digital signal flows comprise a current signal flow and a voltage signal flow; the digital signal flow is input into a trapezoidal integral resistance calculation model, the alternating current resistance of the cable is obtained, and the trapezoidal integral resistance calculation model is a model which is constructed based on a trapezoidal integral method and used for calculating the alternating current resistance based on the current signal flow and the voltage signal flow in the digital signal flow. According to the invention, the measurement accuracy and flexibility of the cable AC resistance are improved.

The invention relates to a high-precision current sampling integrated circuit offset calibration method and system, and relates to the technical field of current detection, and the method comprises the steps: obtaining a reference sampling resistance, a real-time voltage and an effective sampling voltage range; calculating a real-time current based on the reference sampling resistor and the real-time voltage; when the real-time current is larger than a preset heating current threshold value, the minimum sampling resistance is calculated based on the effective sampling voltage range and the real-time current; the adjustable sampling resistor is controlled to be adjusted to the minimum sampling resistor for sampling, and the minimum sampling voltage is measured; calculating a sampling current based on the minimum sampling voltage and the minimum sampling resistance; when the real-time current is smaller than a preset sampling current threshold value, the maximum sampling resistance is calculated based on the real-time current and the effective sampling voltage range; the adjustable sampling resistor is controlled to be adjusted to the maximum sampling resistor for sampling, and the maximum sampling voltage is measured; a sampling current is calculated based on the maximum sampling voltage and the maximum sampling resistance. The invention has the effect of reducing the drifting of the resistance value of the resistor.

This invention discloses a parallel system of fractional-order single-phase inverters and its circulating current suppression method, device, and medium. The method includes: establishing a mathematical model of the fractional-order single-phase inverter; constructing a dual closed-loop control loop based on the mathematical model; and controlling the output voltage and output current of the parallel fractional-order single-phase inverters. i 0 Perform tracking control; calculate the initial reference voltage through droop control. U r0 Based on the inverter's droop factor and reactive power, calculate the adaptive virtual inductance and adaptive virtual resistance of the fractional-order single-phase inverter; based on the adaptive virtual inductance and adaptive virtual resistance of the fractional-order single-phase inverter, calculate the voltage drop that should be generated by the adaptive virtual impedance; based on the initial reference voltage... U r0 The voltage drop caused by the virtual impedance is used to obtain the controller reference voltage. U r ; set the controller reference voltage U r This invention serves as the input to a controller-based dual-closed-loop control loop to control the operation of a fractional-order single-phase inverter. It effectively suppresses circulating current.

This invention discloses a method, system, device, and medium for modeling the electro-magnetic-thermal coupling characteristics of a three-phase integrated high-temperature superconducting cable. The method includes: establishing an electrical model based on the equivalent circuit of parallel multilayer tapes; considering interlayer and interphase electromagnetic coupling in the current distribution model to obtain the current in each tape layer; establishing a critical characteristic and equivalent resistance calculation model using the gold extended model considering magnetic field anisotropy and combining it with power-law relations, and calculating AC losses; establishing a two-dimensional heat transfer model considering interlayer thermal resistance with AC losses as a heat source term, and correcting the circumferential non-uniform convection heat transfer conditions and interphase heat conduction channels through angular weighting functions and shape factors; iterating based on time parameters, feeding the temperature field and equivalent resistance back to the current distribution model to achieve closed-loop updates, and outputting electro-magnetic-thermal coupling simulation results, thereby providing a calculation model that more closely matches the actual operating conditions for the steady-state and fault condition simulation of a three-phase integrated high-temperature superconducting cable.

The invention discloses a design evaluation method of a lithium ion battery, and belongs to the technical field of lithium ion batteries. Comprising the steps of determining pole piece design parameters; calculating a material characteristic coefficient according to the material system; calculating a tab position factor according to the tab position coordinates; testing the resistance of the diaphragm; calculating an evaluation coefficient; and performing multi-stage evaluation judgment and outputting optimization suggestions. According to the method, the geometric dimension of the pole piece, the resistance of the diaphragm, the material characteristics, the tab design and the tab position are comprehensively considered, the battery design scheme is comprehensively and quantitatively evaluated, whether the design scheme meets the energy efficiency requirement or not can be quickly judged, the development period is effectively shortened, and the development cost is reduced.

The battery pack diagnosis method includes a step of obtaining detection data including a current and a temperature of a battery pack, a step of obtaining function data of an open circuit voltage and a resistance which are functions of a charging state of each of the cells, a step of creating a resistance table of each of the cells using the function data and the detection data, a step of calculating the charging state of each of the cells using the current, the temperature, and the voltage of each of the cells, a step of calculating a charge capacity of each of the cells, the resistance, and a charging state per cell, and a step of calculating an energy capacity of the battery pack using the charge capacity, the charging state per cell, and the resistance.

The invention relates to the field of semiconductors, and discloses a 4H-SiC SBD device structure parameter and working voltage prediction model, which comprises the following steps: calculating based on a theoretical formula related to 4H-SiC breakdown characteristics, and determining the device structure parameter; an adaptive physical model is selected, simulation software is used for calculating electrical characteristics, and structural parameters are adjusted according to a working principle to obtain an optimal optimization scheme; obtaining an optimal simulation physical model according to process tape-out and chip test data; and in combination with an on-resistance calculation formula and a tape-out test result, completing consistency verification of simulation of chips of different specifications and tape-out data, and establishing a relation prediction model of structural parameters and working voltage of a chip of a target specification. According to the method, the forward working voltage of the SiC SBD devices of different specifications is predicted and analyzed by establishing the prediction model combining the structural parameters and the on resistance, the process tape-out period is shortened, the process cost is reduced, and the research and development efficiency is improved.

The invention relates to the technical field of wire temperature testing, in particular to a graphene copper wire temperature coefficient testing system which comprises a micro environment box and a sample loading module arranged in a temperature control cavity, and the sample loading module is used for loading a graphene copper wire sample and applying current; the voltage measuring module is electrically connected with the sample loading module and is used for measuring the sample voltage and the standard resistance voltage of the graphene copper wire sample; and the data acquisition and processing module is used for receiving the sample current, the sample voltage and the standard resistance voltage of the graphene copper wire sample, calculating the resistance of the graphene copper wire sample, obtaining a sample resistance temperature coefficient and outputting a test report. The complete, precise and automatic temperature coefficient testing technology from graphene copper wire sample treatment, environment control to final data analysis powerfully supports the fundamental research and industrial application of the new graphene copper material.

The invention discloses an intelligent power transmission and distribution equipment state monitoring and early warning system based on the Internet of Things, relates to the technical field of power transmission and distribution equipment monitoring, and is used for solving the problem of hysteresis increase of equipment alarm. Calculating a voltage peak value based on a result, evaluating electromagnetic pulse resistance in combination with conductivity, monitoring electromagnetic pulses in real time, acquiring a monitoring result at a plurality of analysis time points, calculating an electromagnetic pulse value, setting an electric energy input reduction amount in combination with equipment resistance, performing electric energy regulation and control, monitoring equipment temperature, and judging whether to give an alarm or not. Equipment is screened according to a judgment result, grounding line resistance is called in a correction interval to calculate shunting characteristics, and the equipment is subjected to point arrangement correction and secondary evaluation in combination with shunting resistance and temperature, so that dynamic monitoring and alarm of electromagnetic interference are realized, and the operation safety of a power system is improved.

The invention belongs to the technical field of resistive random access memories, and particularly relates to a PMC resistive random access memory unit model supporting historical state memory of a conductive wire. Comprising an anode and a cathode which are respectively used as a port an and a port ca; the conductive wire dynamic module is used for tracking the dynamic state of conductive wire growth SET or conductive wire dissolution RESET in real time by taking the conductive wire height h and the conductive wire radius r as core state variables and using an integrator; the state switching logic module is used for triggering the state switching of the SET or the RESET through a voltage threshold value based on the anode-cathode, and only switching the working state when the RESET is quitted without resetting the parameters of the conductive wire; and the resistance calculation and current output module is used for calculating the total resistance of the conductive wire based on the real-time state of the conductive wire and outputting safe current in combination with current-limiting protection. According to the invention, the physical process of partial growth-partial dissolution-secondary growth in a residual state of the conductive wire in a real device can be accurately reproduced.

The application discloses a current setting method and device of an anti-jump locking relay, and the method comprises the following steps: calculating the breaking current of a circuit breaker according to the rated voltage of a substation DC system, the first coil resistance of a TBJ in a relay protection device, the parallel equivalent resistance of the TBJ coil and the second coil resistance of the circuit breaker; determining the setting current which is greater than the breaking current by a preset differential; performing the refuse-to-operate processing on the TBJ by calculating the operating current of the setting current and the operating time of the operating current; and determining the final setting current of the TBJ. It can be seen that the operating characteristics of the TBJ are analyzed by calculating the operating current and the operating time, so that the ability of avoiding the current impact when the TBJ input loop is grounded is analyzed, the refuse-to-operate processing is performed on the TBJ, and the final setting current obtained can guarantee that the relay protection device will not malfunction, so that the operation accuracy of the relay protection device is improved, and the safety of the power grid is ensured.