99 results about "Electrical resistance meter" patented technology

The invention discloses an anti-interference measurement method for Josephson junction resistance, and belongs to the technical field of quantum chips. According to the method, n * m resistance measurement values are obtained by applying n alternating-current electric signals with different frequencies to a Josephson junction and performing m times of measurement under the action of each alternating-current electric signal; determining a weight corresponding to each numerical value based on the occurrence frequency of the numerical value of each resistance measurement value in the n * m resistance measurement values; and determining a resistance calculation value of the Josephson junction by using each numerical value and the corresponding weight. According to the method, multiple times of measurement are carried out under the alternating current signals with different frequencies, the proportion of the resistance measurement values with errors caused by noise coupling in the environment to all the resistance measurement values is reduced, and the accuracy of Josephson junction resistance measurement can be effectively improved.

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 discloses a method and a system for determining reactive compensation capacity of a transformer area and a voltage out-of-limit governance device, which are applied to voltage reactive compensation of rural transformer areas, and the method comprises the following steps: obtaining the daytime maximum reverse power, the nighttime maximum load power, the line basic parameters, the maximum voltage threshold value and the minimum voltage threshold value of the transformer area; calculating line reactance and real-time line resistance by combining the basic parameters of the line; and respectively comparing respective threshold values through the maximum voltage and the minimum voltage, and calculating the reactive compensation capacity of the transformer area by combining the daytime maximum reverse power of the transformer area, the nighttime maximum load power, the line reactance and the real-time line resistance. In the working process, reactive compensation capacity calculation is conducted on the capacitor and the reactor according to relevant information of the transformer area, the relatively accurate reactive compensation capacity is obtained, then the capacity configuration of the voltage out-of-limit treatment device is conducted, the reactive voltage regulation effect can adapt to the actual situation requirement of the transformer area, and daytime and nighttime bidirectional out-of-limit of the voltage of the transformer area is effectively treated.

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 application discloses a high-voltage vacuum arc-extinguishing chamber contact resistance and equivalent thermal analysis method, comprising the following steps: three-dimensional equivalent modeling of the high-voltage vacuum arc-extinguishing chamber; determining the number and position of the contact piece contact points; experimentally measuring the high-voltage vacuum arc-extinguishing chamber loop resistance and calculating the contact radius; establishing a conductive bridge, and obtaining a simulation loop resistance by an electromagnetic simulation software; adjusting the contact radius so that the simulation loop resistance is consistent with the experimental measurement result, and obtaining an adjusted conductive bridge; performing electromagnetic field-thermal field-airflow field two-way coupling simulation analysis based on the high-voltage vacuum arc-extinguishing chamber equivalent model of the adjusted conductive bridge, and obtaining the high-voltage vacuum arc-extinguishing chamber temperature rise distribution. The application can more accurately simulate the current constriction effect on the large-size high-voltage vacuum contact piece and more accurately simulate the high-voltage vacuum contact piece contact resistance.

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.

The invention provides a dry-type hollow shunt reactor winding inter-strand short circuit fault identification method, and relates to the technical field of power equipment fault diagnosis. The method comprises the following steps: acquiring current and voltage waveforms of a reactor; calculating a current effective value and a voltage effective value in the latest n periods, and an average phase difference between the voltage and the current in the n periods; the average equivalent resistance in the latest n current periods is calculated; calculating an average power factor in the latest n current periods; calculating the average active power loss in the latest n current periods; calculating an average power factor angle in the latest n current periods; judging whether the reactor has an inter-strand short-circuit fault or not; judging whether the reactor has a same-turn inter-strand short-circuit fault or not; judging whether the reactor has a short-circuit fault between different turns and the like; according to the method, the difference between the set parameter change rate threshold values is multiple orders of magnitude, so that the identification accuracy of the same-strand and different-turn inter-strand short-circuit faults of the dry-type shunt reactor is greatly 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.

The internal resistance calculating device of the embodiment is provided with a current acquisition section, a voltage acquisition section, a charge amount calculation section, and an internal resistance calculation section. The current acquisition section acquires a battery current flowing in a battery. The voltage acquisition section acquires a battery voltage applied to the battery. The charge amount calculation section integrates the battery current acquired by the current acquisition section with respect to time, and calculates a charge amount moved to the battery. The internal resistance calculation section calculates an internal resistance of the battery based on a change amount of each of the battery current and the battery voltage until the charge amount calculated by the charge amount calculation section becomes equal to or greater than a threshold value set in advance.

The application relates to the technical field of power electronic device state monitoring, in particular to a SiC MOSFET junction temperature monitoring method, device, equipment and medium, which comprises the following steps: obtaining a through-state current and a through-state voltage of a measured silicon carbide metal oxide semiconductor field effect transistor (SiC MOSFET); calculating a through-state resistance of the SiC MOSFET according to the through-state current and the through-state voltage; and calculating a junction temperature of the SiC MOSFET according to the measured through-state resistance based on a mapping relationship between the through-state resistance and the junction temperature established in advance. Thus, the problems in the prior art that the junction temperature monitoring method can only be applied to a relatively narrow switching frequency range and the precision is seriously affected by device aging are solved, the working frequency is improved, the cost is reduced, and the influence of device aging on the junction temperature monitoring is reduced by proposing a novel through-state voltage drop online measurement circuit and a SiC MOSFET junction temperature monitoring strategy considering aging.

The invention discloses a high-voltage direct-current support capacitor insulation resistance measuring device and method, and the device comprises a direct-current charging test loop, a test loop, a discharging test loop, and a control system. The direct-current charging test loop comprises a power supply, a first switch, a voltage regulator, a boosting transformer, a high-voltage silicon stack, a current-limiting resistor and a second switch, the test loop comprises a third switch, a first discharging resistor, a voltmeter and a high-voltage direct-current support capacitor to be tested, and the discharging test loop comprises a fourth switch, a second discharging resistor, a fifth switch and a voltage divider. The control system comprises a signal acquisition unit, a control output unit and a controller; the measurement method comprises the steps of capacitance measurement, voltage measurement and insulation resistance calculation. The device is simple in structure and convenient to operate, and can meet the insulation resistance measurement test requirements of the high-voltage and high-capacity direct-current support container.

The invention discloses an ultra-high voltage shunt reactor turn-to-turn fault detection method based on equivalent resistance variation, which comprises the following steps: dividing a fault phase winding into a grid-connected side non-short-circuit section, a short-circuit turn section and a neutral point side non-short-circuit section, and defining the number of turns, resistance, self-inductance and mutual inductance parameters of each section; constructing a Kirchhoff voltage and current equation set based on the electrical parameters of each section of winding, and deducing a phasor relationship between a fault phase head end current and a turn current in combination with a short-circuit current relational expression; the terminal voltage of the shunt reactor is expressed as a function of head end current, and an equivalent impedance analytical expression containing the short-circuit turn ratio and the transition resistance is obtained; setting a minimum identification threshold of a short-circuit turn ratio and a maximum tolerance threshold of a transition resistor, traversing all equivalent resistance calculation values in the range of the two thresholds, and multiplying the minimum value by a reliable coefficient to serve as a fault criterion setting value; three-phase voltage and current data are collected in real time, a fundamental wave phasor is extracted to calculate an equivalent resistance measurement value, and if any phase measurement value exceeds a setting value, the turn-to-turn fault is determined.

The present invention discloses a method for measuring the grounding resistance of a transmission tower. The method comprises: short-circuiting the grounding down conductors corresponding to the pole legs of the tower under test, retaining the connection between the grounding down conductor and one of the pole legs, and disconnecting the grounding down conductor from the remaining pole legs to build a test model; measuring the down conductor current value and the current value of each grounding body under a first working condition and a second working condition, and calculating the branch current of the remote multi-level grounding body; calculating the grounding resistance of the tower under test based on the down conductor current value and the current value of each grounding body under the first working condition and the second working condition, the branch current of the remote multi-level grounding body, and the preset parallel equivalent resistance of the remote multi-level grounding body. The present invention builds a test model, measures the current value of each loop of the equivalent circuit under the first working condition and the second working condition, and calculates the grounding resistance of the tower under test in combination with the preset parallel equivalent resistance of the remote multi-level grounding body; thereby improving the accuracy of the grounding resistance measurement.

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.

A motor control device includes a first power supply section, a first switch capable of disconnecting power supply from the first power supply section, a DC supply section that outputs power from the first power supply section to a bus, a capacitor connected to the bus, a switching element that converts DC supplied to the bus into AC to drive and control a motor, a second power supply section having one end connected to the bus and the other end grounded via a second switch, a current detection section that detects a current value between a coil of the motor and the bus connected to the second power supply section, and an insulation resistance calculation section that calculates an insulation resistance value of the motor based on current values detected by the current detection section at the time of disconnection and at the time of connection of the second switch, a voltage value of the capacitor, and a voltage value of the second power supply section when the power supply is disconnected by the first switch section.

The invention belongs to the technical field of capability evaluation of a network-building type micro-grid, and discloses a method and a system for calculating Thevenin equivalent impedance of the network-building type micro-grid, and the method comprises the steps: building a variable resistance model, calculating an operation point of the network-building type micro-grid under the condition of continuous resistance change in combination with a power flow equation, and drawing a resistance change voltage power curve; according to the tangent slope of two adjacent continuous solutions on the resistance change voltage power curve, determining an equivalent impedance module of the grid-forming type micro-grid at a critical point; abandoning resistance to ground at a common coupling point of the grid-forming type micro-grid based on an equivalent impedance module, calculating an operation point of the grid-forming type micro-grid under continuous change of an impedance angle, and drawing an impedance change voltage power curve; and analyzing the maximum power point corresponding to the common coupling point in the impedance change voltage power curve, and determining the Thevenin impedance value of the network-forming micro-grid. According to the invention, quantitative evaluation of the voltage supporting capability of the network-forming type micro-grid can be realized.

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 discloses a multi-loop current balancing method, and belongs to the technical field of current control. According to the method, a line resistance calculation model is established based on the number of lap joint bolts, cable length, cable sectional area, cable resistivity, copper bar length, copper bar sectional area, copper bar resistivity and lap joint bolt contact resistance; establishing a target function based on the cable material cost and the copper bar lap joint cost by taking the lowest reference cost as a target; based on the objective function and the line resistance calculation model, adjusting the cable length and the number of lap joint bolts of each loop until the current deviation rate of each loop is less than 5%, and obtaining the optimal cable length and the optimal number of lap joint bolts of each loop; and S3, calculating the actual current deviation ratio of each loop based on the actual current of each loop under the condition, and if the actual current deviation ratio is not less than 5%, returning to execute the step S3 until the actual current deviation ratio is less than 5%. According to the invention, the realization cost can be greatly reduced while multi-loop current equalization is realized.

The present invention discloses a test method and application for measuring current distribution in a hybrid cathode lithium battery, relating to the technical field of lithium batteries. The test method comprises: independently preparing independent battery cells according to the surface loading of each material of the lithium battery hybrid cathode in the hybrid cathode, each independent battery cell being provided with a surface electrode on the negative electrode sheet for forming a pure electronic circuit with the negative electrode tab; measuring the equivalent resistance of each independent battery cell, collecting the voltage of each independent battery cell under preset power-on conditions after connecting all the independent battery cells in parallel, and calculating the current passing through each soft pack based on the equivalent resistance, which is the current corresponding to each material in the hybrid cathode under preset power-on conditions. The test method of the present invention designs more reasonable working conditions for evaluating the charge and discharge performance of the battery cells of the hybrid system, ensuring the rate performance and long cycle performance of the hybrid system, and can also be applied to other batteries such as sodium batteries.

The invention relates to the technical field of resistance calculation of a permanent magnet synchronous motor, and discloses a long-line driving motor resistance identification method based on double observers, which comprises the following steps of: establishing two observer modules, and constructing a full-order current observer state equation for a motor; actual current and actual voltage are collected at intervals, a current estimation value is calculated based on the actual current and the state equation, and estimation values of stator resistance and permanent magnet flux linkage of the two observers are dynamically updated based on the current estimation value through an adaptive law; carrying out difference method processing on the output voltage equations of the two observers to eliminate permanent magnet flux linkage items; and calculating the real value of the stator resistance based on the actual voltage difference and the set current difference of the two observer modules. The invention further discloses a device for implementing the method and computer equipment. According to the scheme, the position of the rotor can be accurately tracked under various working conditions, stable operation of the motor is guaranteed, and the fault rate is reduced.

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.