1631 results about "Current distribution" patented technology

The invention relates to the technical field of energy storage batteries, and discloses a yacht energy storage battery internal short circuit detection method, device and equipment and a medium, and the method comprises the steps: sampling the voltage and current of a yacht energy storage battery pack, and obtaining original sampling data; performing parameter identification to obtain RC network dynamic response data; performing sliding window Fourier transform and wavelet packet decomposition to obtain a target feature vector; performing voltage abrupt change feature judgment, current abrupt change feature judgment and impedance spectrum feature judgment based on the target feature vector to obtain a multi-stage fault judgment result; starting the three-ring nested control structure and inputting the three-ring nested control structure into a PWM modulation unit to obtain a control compensation signal; the control compensation signal is input into the current sharing controller, the PWM duty ratio of the parallel branches is adjusted, and a current sharing control signal is obtained, the reliability of fault detection is improved, cooperative control of state protection, power balance and current tracking is achieved, and the current distribution problem of the parallel branches is effectively solved.

The invention discloses a series lithium battery pack power supply equalization management method. The method comprises the following steps: acquiring an original data set of a series lithium battery pack; calculating a voltage change rate, a temperature sudden rise rate and an internal resistance fluctuation amplitude, and obtaining a dynamic feature set of battery operation; when the dynamic feature set exceeds a corresponding preset threshold value, obtaining a short-circuit risk assessment result; matching a pre-established battery pack topological structure diagram with the short-circuit risk assessment result, determining a target battery identifier needing to be isolated, generating an isolation instruction by adopting a relay control algorithm, and completing the isolation of the short-circuit battery; adjusting the charging current distribution of the updated battery pack through an equalization management algorithm to obtain equalized battery operation parameters; and if the voltage, temperature and internal resistance data of the residual single batteries are all in a normal range, determining that the system stability is recovered, and obtaining a final running state of the battery pack. The short-circuit risk of the lithium battery pack can be effectively prevented, and intelligent management and safety improvement of the battery pack are realized.

The invention relates to the technical field of battery management, in particular to a charging type mobile power station remote monitoring and analysis system which comprises a battery pack state monitoring module, a monitoring path adjusting module, a partition monitoring and energy dispatching module, an energy distribution module and a charging efficiency optimization monitoring module. According to the invention, through refined battery level monitoring and health state analysis, the real-time performance and accuracy of battery management are improved, the voltage, current and SOC parameters of the battery are monitored in real time, the health state of the battery is comprehensively evaluated, the monitoring path and the monitoring frequency are dynamically adjusted, resource allocation and efficiency maximization are ensured, the energy distribution difference between the battery packs is accurately identified, and the battery management efficiency is improved. By adjusting the charge and discharge flow, avoiding over-charge and over-discharge, improving the stability and service life of the battery and optimizing the charging current distribution and the charging plan, efficient charging is realized, the energy utilization efficiency is improved, the response speed and precision of the whole system are improved, a more intelligent and personalized solution is provided, and the requirements of different application scenes are met.

The invention provides a double-pulse high-frequency switching power supply control method and system for precise electroplating, and relates to the field of electroplating, and the method comprises the steps: collecting area surface data through a three-dimensional scanner, and obtaining a three-dimensional model; extracting a high-curvature area grid according to the three-dimensional model, and calculating to obtain a surface concave-convex degree index; performing current field simulation, and calculating current density vector distribution; when the deviation of the current density vector distribution exceeds a preset deviation threshold value, pulse parameters are optimized through a genetic algorithm; selecting a pulse parameter which is most matched with the surface concave-convex degree index, and carrying out iterative calculation to obtain updated current density vector distribution; based on the difference between the updated current density vector distribution and the initial distribution, predicting a coating thickness value, and determining a preliminary evaluation index; and optimizing pulse parameters to obtain a final control scheme of uniform current distribution. According to the method, pulse parameters can be dynamically optimized according to the geometrical shape of the workpiece, and uniform current distribution and stable plating quality are realized.

The invention discloses a differentiated precise current distribution control method in a multi-workpiece batch electroplating process. The method comprises the following steps: acquiring multi-workpiece feature data and preprocessing the multi-workpiece feature data; workpiece difference characteristic analysis and grouping are carried out; modeling and analyzing the electric field distribution of the electrolytic cell; plating layer growth dynamic monitoring and prediction are carried out; and generating a differential current distribution strategy. A multi-frequency differential resistance spectrum acquisition system is adopted to realize real-time monitoring of plating layer growth, an improved independent component analysis algorithm fused with spatial constraint is applied to perform workpiece group resistance spectrum decoupling, and micro-area accurate current modulation is realized through a self-adaptive waveform library of an electric field distortion area. The problems that dynamic characteristics of plating layers are difficult to monitor and differentiation control of workpieces with similar characteristics is insufficient in multi-workpiece electroplating are solved, and the quality consistency of the plating layers is improved.

The invention relates to the field of power battery energy management, in particular to a power battery pack charging and discharging efficiency dynamic optimization system and method, and the system comprises a central control unit, a multi-dimensional sensing module, a dynamic charging and discharging control module, a working condition-heat dissipation cooperation module, a parallel cell equalization module and an aging adaptation optimization module. The multi-dimensional sensing module is used for collecting basic parameters, polarization characteristics, parallel state, aging degree and environmental parameters of a battery pack, the dynamic charging and discharging control module is used for collecting data, the working condition-heat dissipation coordination module adopts a three-stage heat dissipation framework, and the parallel battery cell balancing module is used for balancing the battery pack through a dynamic current distribution and voltage active balancing double-coordination mechanism. The aging adaptation optimization module is used for grading and differentially optimizing charge and discharge parameters and heat dissipation strategies based on the aging degree of the battery cell, so that the problems of low charge and discharge efficiency, poor wide temperature range adaptability, weak parallel consistency, fast aging attenuation and multi-factor coupling deterioration of the power battery pack are solved.

The invention relates to the technical field of integrated circuit manufacturing, in particular to a precise electroplating control system and method for an electroplated layer of a double-layer circuit board, and the method comprises the steps: building a multi-physical field coupling simulation model, and simulating the internal current density and ion concentration distribution of a via hole; constructing a mapping relation between the current density and the side wall electroplating thickness based on a simulation result, and predicting the electroplating thickness; through thickness prediction feedback, a time sequence adjustable pulse current control strategy is designed, the pulse amplitude, the duty ratio and the on-off period are dynamically adjusted, and current distribution optimization is guided; the state of the electroplating process is sensed in combination with real-time monitoring and analysis of multi-source parameters of electrode potential, conductivity and fluid velocity; and based on the prediction model and the real-time parameters, adjusting the pulse waveform and the time sequence through closed-loop compensation. According to the method, the uniformity and controllability of the thickness of the electroplated layer on the side wall of the via hole can be remarkably improved.

The invention relates to the technical field of medical instruments, in particular to a high-precision time interference non-invasive brain deep electrical stimulation method, equipment and system, and solves the problems that two stimulation electrodes are used for each pair of current in traditional time interference-based non-invasive brain deep electrical stimulation, so that the current distribution is relatively dispersed, and the stimulation focusing performance is relatively poor. According to the method, high-precision 4 * 1 electrode configuration is used, two electrodes for applying a stimulation current are changed into a 4 * 1 electrode form, the flowing path of the current is effectively limited, the current is more focused, and the focusing performance of the interference current is further improved. According to the device, high-precision current control is realized through the anti-phase output circuit, the 4 * 1 voltage division circuit, the constant current source module and the impedance detection module; the system supports forward and reverse electrode position optimization, a personalized real finite element head model simulation system based on MRI data is used for guiding practical application, the focusing performance of each pair of current in a target brain region is improved, and therefore the overall stimulation precision in the target brain region is improved.

The invention discloses a buried pipeline multi-source stray current interference coupling test system and test method. The system comprises a test pipeline module, a stray current simulation module, a cathode protection module, a multi-dimensional monitoring module, an intelligent protection module and a data analysis module. A comprehensive system integrating multi-source interference, a full-size pipeline, intelligent protection and real-time monitoring integrates static direct current interference, dynamic direct current interference and alternating current interference into the same system, and the problem that multi-source stray current superposition cannot be truly simulated in the prior art is solved. The comprehensive test of static direct current, dynamic direct current, alternating current stray current and anticorrosive coating defect coupling interference can be simulated, online monitoring of pipe-to-ground potential, current distribution and corrosion rate is realized, the timeliness and accuracy of test data are improved, cooperative work and data linkage analysis of multiple modules are realized, and the test efficiency is improved. A powerful basis is provided for optimizing a protection strategy, and the corrosion protection effect of the buried pipeline is improved.

The invention relates to the technical field of data processing, and discloses an anti-corrosion protection method and system for a propeller in a deep sea environment. The method comprises the steps that seawater corrosion data are collected through a sensor array, risk grading is conducted through a genetic algorithm, current distribution is optimized through a Lagrange algorithm, a self-adaptive protection potential field is constructed to respond to chloride ion concentration changes, the corrosion trend is analyzed based on a prediction model, and anti-corrosion control is executed. The intelligent level and the protection effect of anti-corrosion protection of the propeller in the deep sea environment are improved.

The invention belongs to the technical field of fault early warning, and discloses a heater fault early warning method and system based on current analysis. Comprising the steps that transient current signals of all heating wire loops in the copper bush heater are collected in real time, harmonic characteristic parameters are extracted, and a dynamic current fingerprint database and a multi-dimensional harmonic characteristic spectrum are generated respectively; dynamically calculating the contact impedance between each heating wire and the copper sleeve groove according to the dynamic current fingerprint database and the multi-dimensional harmonic characteristic spectrum; the current distribution path of each heating wire in the copper sleeve groove is restored in real time, the abnormal contact form of each heating wire is identified, the falling risk probability and falling risk strength of each heating wire are dynamically predicted by fusing the falling precursor signals of each heating wire detected in real time, and a grading early warning strategy report is generated in real time; according to the invention, fault early warning can be converted into preventive maintenance from post-maintenance, the intelligent level of operation and maintenance of the heater is improved, and the continuity and safety of production are guaranteed.

The invention belongs to the technical field of transformer evaluation, and particularly relates to a harbor area transformer bearing capacity evaluation method, which comprises the steps of S1, analyzing voltage and current distribution characteristics and a harmonic component propagation rule of a harbor area microgrid under high-proportion new energy access; analyzing a change rule of a winding leakage magnetic field, an iron core magnetic flux density and winding and iron core loss; s2, calculating the hot spot temperature of the transformer in each historical time period; s3, calculating the predicted residual service life Tb and the predicted actual total service life Tins of the transformer; s4, calculating an aging coefficient B and a primary health index H1 of the transformer; s5, calculating a comprehensive health index Hcom of the transformer; s6, calculating a final health index H of the transformer; s7, if H reaches a preset threshold value, equipment is replaced; and if not, reversely deducing and predicting the residual life Tb1. According to the method, the operation state of the transformer can be accurately evaluated under the working condition of frequent power flow switching.

The invention belongs to the technical field of antenna engineering, and particularly relates to an ultra-wide-band low-profile phased-array antenna, which realizes broadband impedance matching characteristics and effectively expands the working bandwidth of the antenna by optimizing a dipole arm structure and introducing a matching branch knot and linear tapered slot composite structure on a radiation unit layer; on the array architecture level, an electromagnetic metasurface technology is adopted, array current distribution is improved through a periodic artificial electromagnetic structure, the active standing-wave ratio is remarkably reduced, the scanning angle of an array is widened, and meanwhile high compression of a system profile is achieved; on the structural design level, a three-dimensional composite structure of a transverse metal floor, a longitudinal radiation layer and a transverse metasurface layer is innovatively constructed, and the overall section height is reduced to 0.137 lambda Low (lambda Low is the lowest working frequency wavelength) through electromagnetic coupling and space folding technologies; in conclusion, the ultra wide band (the relative bandwidth is greater than or equal to 90%) and the low profile (lt; and the method is suitable for a new generation of broadband phased array radar system.

The invention provides a quadrant switching smooth control method, device and equipment for an electro-hydrostatic system, and relates to the technical field of electro-hydraulic compound drive control. According to the method, sensor state information is acquired, a discretization state-space equation is established, a cost function is designed, improved sequential quadratic programming is called to solve the optimal control quantity, instructions are smoothly processed through a linear tracking differentiator, a reference value is calculated through a current distribution strategy and pressure feed-forward compensation, and cooperative impact resistance control is achieved through a PI controller and SVPWM. The response speed and stability of the electro-hydraulic compound system in the quadrant switching process can be remarkably improved, the problems of impact and torque overshoot are effectively restrained, the service life of equipment is prolonged, and the electro-hydraulic compound system is suitable for high-performance requirement scenes under complex working conditions such as electric loaders, excavators and winches.

The invention relates to the technical field of high-voltage PCB design, and particularly provides a large-model-based high-voltage PCB current path optimization design method and system, and the method comprises the steps: S2, obtaining current distribution according to electrical parameters and layout information through employing an electrical simulation model; s3, acquiring temperature field distribution according to the current distribution, the resistivity of the via hole array and the heat conductivity coefficient of the PCB substrate; s4, acquiring first thermal mechanical stress distribution according to the temperature field distribution, the thermal expansion coefficients of the via hole array and the PCB substrate and the elastic modulus of the via hole array and the PCB substrate; s5, analyzing whether the first thermal mechanical stress distribution meets a preset requirement or not, if yes, taking new layout information as final layout information, and if not, adjusting layout parameters of the via hole array according to the first thermal mechanical stress distribution, and returning to the step S2; according to the method, the problems of local hot spots and thermal mechanical stress caused by uneven current distribution in the high-voltage PCB via hole array can be solved.

The invention provides a metal oxide semiconductor electrostatic protection device. The metal oxide semiconductor electrostatic protection device comprises a substrate; a well region of a first conductivity type disposed in the substrate; the source electrode region is formed in the well region of the first conduction type, the source electrode region comprises a first heavily doped region, and the first heavily doped region is of a second conduction type; a drain region; a gate structure; the body contact region comprises a third heavily doped region, and the third heavily doped region is of the first conduction type; wherein the drain region comprises a plurality of second heavily doped regions, the plurality of second heavily doped regions are of a second conduction type, and the plurality of second heavily doped regions are arranged at positions adjacent to the gate structure; the fourth heavily doped region is of the second conduction type, and the fourth heavily doped region is not arranged close to the gate structure; and a lightly doped drain region of the second conductivity type disposed below the plurality of second heavily doped regions and the fourth heavily doped regions. By changing the structure of the drain electrode heavily doped region, the ESD current distribution is improved, and the ESD endurance capability of the device is improved.

The invention discloses a lightning protection system for an environment monitoring station and a use method of the lightning protection system, and relates to the technical field of lightning protection, and the system comprises a multi-stage composite grounding module, an intelligent energy distribution module, a lightning current monitoring module, a surge protection module and a grounding impedance optimization module. Comprising a main grounding body, an auxiliary grounding body and a deeply-buried grounding electrode, the grounding resistance can be remarkably reduced, the lightning current leading-in efficiency can be improved, when lightning current passes through, the multi-stage grounding structure can effectively disperse the current, overload of a single grounding body is avoided, and meanwhile the grounding resistance of the grounding body is improved. The intelligent energy distribution module can dynamically adjust a current distribution strategy between different grounding bodies according to the magnitude of lightning current, ensures that the deeply-buried grounding electrode is preferentially conducted under the condition of strong lightning stroke, starts a parallel discharge mode of the main grounding body and the auxiliary grounding body under the condition of weak lightning stroke, and guarantees the safe operation of the environment monitoring station.

Provided are a control method and apparatus, an electronic device, and a storage medium. The method comprises: issuing alternating-current active power to corresponding bidirectional energy storage converters so as to adjust current distributed by each bidirectional energy storage converter; and controlling each direct-current power converter on the basis of a target current distribution ratio so as to adjust current distributed to each battery cluster. By controlling alternating-current active power issued to the bidirectional energy storage converters to be a given value, the current of each direct-current bus is controlled, so that battery stacks are simultaneously fully charged or fully discharged; in addition, the current is distributed on the basis of the current ratio of battery clusters in a same stack to reduce system differences, thereby greatly improving the consistency, service life, working efficiency and depth of charge and discharge of a whole battery energy storage system.

The invention discloses an open-phase self-fault-tolerant control method for a phase-shift-free dual three-phase permanent magnet synchronous motor. The method can automatically adjust a current distribution relation in the case of an open-phase fault and suppress torque pulsation in combination with neutral point voltage compensation. Comprising the following steps: driving two pairs of three-phase winding modules of the phase-shift-free DTP-PMSM in parallel by adopting two two-level three-phase voltage source inverters, and providing a mathematical model of the motor; current distribution is automatically adjusted; compensating the voltage of the neutral point, and calculating the offset of the fault module; the current is redistributed to suppress the torque ripple after the fault, and the secondary oblique wave component generated by the phase failure fault is eliminated; a current loop controller is improved through dead-beat predictive control; the speed ring controller is optimally designed into an improved sliding mode controller; an improved double-loop controller system is formed by combining improved sliding mode control and dead-beat prediction control, high-gain parameters are set to improve the dynamic response performance of the system, and a new self-fault-tolerant control system is formed.

The invention belongs to the technical field of power supply transmission, and relates to a POE-POF power supply transmission method and system, and a storage medium. The method comprises the following steps: collecting electric quantity data of POE-POF power supply transmission network nodes in real time, and extracting a dynamic power feature set; identifying an abnormal power loss event based on the feature set and extracting an abnormal mode feature; abnormal path nodes are positioned by combining a POE-POF power supply transmission network topological structure, voltage and current distribution parameters are optimized, and an optimized power distribution scheme is generated; dynamically adjusting voltage and current values of a power supply path, evaluating an energy consumption trend and generating a trend data set; and adaptively adjusting the electric quantity acquisition parameters according to the energy consumption trend, updating the acquisition configuration and circularly executing the steps. According to the invention, intelligent detection, accurate positioning and dynamic optimization of abnormal loss of the power grid are realized, the stability and energy efficiency of the power supply network are improved, and the method is suitable for fine management and energy-saving optimization of the intelligent power grid.

The invention relates to the technical field of building energy supply, and aims to solve the problem of how to efficiently utilize solar photovoltaic stored energy to supply energy to a building. According to the technical scheme, a monocrystalline silicon photovoltaic module array is laid on the roof of a building, and a lithium battery pack and an alternating-current distribution box are connected through a bidirectional energy storage converter to supply power to electric equipment of the building. The meteorological data acquisition module is used for measuring an irradiance value and a temperature value, and the load monitoring module is used for acquiring electric power. In the building energy management platform, a photovoltaic power generation prediction model generates a photovoltaic output prediction curve in combination with real-time and prediction data, a building load prediction model generates a load power demand curve according to historical and regular data, and an energy storage control decision-making model performs energy storage control according to a difference matrix between the two. A lithium battery pack charging and discharging power distribution scheme is obtained through a dynamic programming algorithm, and the bidirectional energy storage converter is controlled. The system is mainly used for realizing efficient and stable solar photovoltaic energy storage and supply of buildings.

The invention discloses an intelligent alarm system and method for a distribution box, and relates to the technical field of intelligent alarm. The magnetic field intensity value of a distribution box door magnetic switch is monitored in real time to judge whether a distribution box door is in an open state; if so, collecting a vibration signal of the distribution box to judge whether the vibration of the distribution box is abnormal; recording the opening timestamp of the door of the distribution box, and judging the coincidence degree of the door opening time of the distribution box and the historical door opening time; jointly judging whether the door opening state of the current distribution box door is normal door opening or abnormal door opening, and if the door opening state is abnormal, sending out a first-level alarm; if normal, monitoring the door opening duration of the distribution box door and the current environmental data to judge whether a secondary alarm indicating that the hidden danger of damaging the power equipment exists is sent out; therefore, illegal door opening of the distribution box can be judged according to the change of the magnetic field state of the door magnetic switch, the vibration of the distribution box and the opening time of the distribution box door, and the false alarm rate is reduced; therefore, the fault hidden danger of the power equipment in the power distribution box cannot be further deepened.

The invention discloses a balance control method for health states of multiple parallel energy storage units. Firstly, a communication-free state-of-health online estimation method based on a battery semi-empirical life model is deduced, the method does not need communication, is small in calculation amount, considers the rated capacity difference, is suitable for the dynamic degradation process of a battery, and is popularized to different rated capacities by introducing the concept of weighted ampere-hour throughput. Then, in order to meet the requirements of health state equalization, accurate current distribution and average direct current bus voltage recovery, a hierarchical control structure is established. Through coordination and cooperation among the main control layer, the secondary control layer and the communication layer in the hierarchical control structure, the provided strategy can realize the control targets of health state balance, accurate current distribution and average DC bus voltage recovery, and can greatly reduce the communication burden of the system.

The invention discloses a continuous prebaked anode aluminum electrolysis production method and system, and relates to the technical field of anode aluminum electrolysis production, and the method comprises the following steps: firstly, collecting current density distribution data and electrolyte distribution state in an electrolytic cell through a real-time monitoring system, and reflecting current and electrolyte conditions of each area in the electrolytic cell in real time; and data support is provided for subsequent adjustment measures. The electrolyte distribution in the electrolytic cell is monitored in real time and intelligently evaluated, intelligent evaluation is performed in combination with the deep learning model, current distribution is automatically adjusted, and it is ensured that the current density is uniform. According to the scheme, the problems of local overload, excessive consumption of the anode and overheating of equipment are effectively avoided, the energy efficiency and the stability of the electrolysis process are improved, the service life of the equipment is prolonged, the maintenance cost is reduced, the downtime is shortened, and therefore the production efficiency and the economic benefits are improved. And meanwhile, human intervention is reduced, the automation level is improved, and the intelligent management capacity of aluminum electrolysis production is enhanced.

The invention relates to the technical field of semiconductors, in particular to an active current sharing strategy for master-slave cooperative control. According to the technical scheme, the system comprises an S < iC > device dynamic current sampling unit, a dynamic current information conversion unit, a dynamic current information processing unit and a variable grid resistance driving circuit, wherein the S < iC > device dynamic current sampling unit is used for collecting real-time current information of the S < iC > device in the turn-on transient process. The method can effectively solve the problem of current imbalance caused by parameter difference of multi-device parallel connection, is especially suitable for parallel connection of three or more modules, guarantees the current sharing effect through fine active current sharing control, adopts a master-slave cooperative control strategy, solves the problem of single-point fault of a main module in traditional master-slave control, and improves the robustness of the system. The device is prevented from being damaged due to excessive current and voltage stress caused by current imbalance, stable operation of the system is guaranteed, current distribution can be effectively adjusted in the load switching process, and stable operation of the system is guaranteed.

The invention relates to a current distribution method and device for parallel batteries in an energy storage system and a storage medium, and belongs to the technical field of energy storage systems, and the method comprises the steps: obtaining at least two battery parameters of each battery module in a plurality of battery modules; determining a sub-weight of each battery parameter based on each battery parameter of each battery module; determining a weighting coefficient of the sub-weight of each battery parameter of each battery module; based on the sub-weight of each battery parameter of each battery module and the weighting coefficient of the sub-weight of each battery parameter, determining the current distribution weight of the battery module; dividing the current total load demand current according to the current distribution weight of each battery module to obtain a target output current corresponding to each battery module; controlling the battery module to supply power to the load according to the target output current; the service life of the energy storage system can be prolonged, the reliability of current distribution is enhanced, and the problems of low precision and poor reliability of a traditional current balancing method can be solved.

The invention relates to the technical field of power system analysis, and discloses an active power distribution network vulnerability evaluation and weak link identification method, which comprises the following steps of: firstly, constructing an equivalent sparse graph model of a power distribution network according to an actual topological structure and parameters of the active power distribution network, and then, considering the influence of degrees of adjacent nodes and power flow distribution information; calculating an improved betweenness index of each node and an improved degree index of the line; then considering the influence of each load on actual operation, designing and calculating a node voltage out-of-limit index, finally determining a weight coefficient of each evaluation index by adopting an analytic hierarchy process, and calculating a comprehensive vulnerability index of each node and line according to the weight coefficient of each index; the comprehensive vulnerability indexes of the nodes and the lines are arranged in a descending order, the vulnerable nodes and the vulnerable lines are determined, the improved node degree and line degree indexes provide a finer and more comprehensive view angle for evaluating the vulnerability of the power distribution network, and the operation safety and reliability of the power distribution network can be improved.

The invention discloses a distributed power supply load model establishment method and system, and relates to the technical field of load model establishment, after an establishment system obtains power system information through an API interface, a topological graph model of a power system is established, each component in the power system is abstracted as a node and an edge in the topological graph model, and the topological graph model is established; after simulation software is used for conducting simulation detection on the topological graph model, a target value of the topological graph model is calculated through an objective function, an optimal path between nodes is updated through a path algorithm, current distribution of edges is adjusted through a graph cut algorithm, power loss is reduced, overload is avoided, the steps are repeated for multiple iterations, and when convergence conditions are met, the optimal path is obtained. And outputting the final topological graph model as a comprehensive load model. The system can optimize the targets at the same time through a graph optimization algorithm, improves the overall benefits of the system, and overcomes the defect that the complexity of the power system cannot be comprehensively considered in single target optimization.

The invention provides a current detection coil parameter determination method and a conductor current distribution detection method, and the method comprises the steps: presetting virtual detection parameters at least according to the size of a detected conductor, and the virtual detection parameters at least comprise virtual model parameters and performance parameters of a virtual coil; on the basis of the Faraday's law of electromagnetic induction, real performance parameters of the current detection coil are determined according to the virtual detection parameters, the real performance parameters of the current detection coil are used for preparing the current detection coil, and the current detection coil is used for detecting current distribution of the detected conductor. The current detection coil prepared by adopting the performance parameters obtained by the method has high sensitivity to current in a detection area and has high shielding capability to current in a non-detection area, and non-intrusive detection with high identification capability to local current is realized. And the method can design the performance required by the coil in a customized manner according to different use scenes, and has a wide use range.

The utility model provides a testing device for chip testing, and relates to the technical field of chip testing. A plurality of test probes penetrate through an upper base, a conductive part is mounted at the bottom of the upper base and comprises a plurality of insulating component groups and a plurality of conductive component groups arranged at intervals along a first direction, each conductive component group comprises at least one conductive sheet, the top of each conductive sheet is in contact with the corresponding test probe, and the bottom of each conductive sheet is in contact with a tested chip. An insulating component group is arranged between two adjacent conductive component groups, and each insulating component group comprises at least one insulating sheet. According to the utility model, the conductive member is equivalently arranged between the tested chip and the test probe, the effective contact area with the tested chip is increased by using the conductive sheet of the conductive member, and the contact pressure between the conductive sheet and the tested chip is reduced relative to the contact pressure between the test probe and the tested chip, so that the current is shunted, and the test efficiency is improved. The current distribution is more uniform, and the situation that the tested chip is scratched due to the fact that the test probe is heated and softened is avoided.