2046 results about "Current distribution" patented technology

Disclosed in the present invention is a graph theory-based method for locating an instability fault source in a direct-current microgrid. The method includes: collecting key electrical feature quantities through an instability fault feature collection and extraction link to accurately capture an instability oscillation phenomenon, and utilizing wavelet packet decomposition to construct fault feature vectors; then, according to the structure of the direct-current microgrid, constructing an undirected graph model G=(V, E, X), which lays a foundation for analysis; applying a graph convolutional neural network for deep learning and training to further improve the accuracy and efficiency of diagnosis; deploying the trained model in an actual system to effectively achieve accurate fault diagnosis and location of an instability source. Also provided in the present invention is a device for locating an instability fault source in a direct-current microgrid. The method provided by the present invention can significantly improve a maintenance level of the direct-current distribution network, and greatly improve a detection and adjustment ability of system operation stability through advanced automatic diagnosis 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 discloses a method and a system for establishing a comprehensive load model containing a distributed power supply, and relates to the technical field of load model establishment, after the 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 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 logistics supply chains, and discloses an intelligent logistics supply chain management method and system, and the method comprises the steps: obtaining the order data of a supply chain in real time; order analysis is carried out according to the receiving information, a delivery task is generated based on an order analysis result, and a first delivery path of the current delivery task is determined; planning an optimal path of supply chain order logistics distribution; inventory information of the supply chain is monitored and updated in real time, and the inventory capacity is dynamically adjusted. According to the method, order division can be realized, refined order management can be realized, a plurality of order sets which can be delivered once in a single pass can be determined, delivery order delivery tasks meeting conditions can be determined through the delivery target model, the optimal path can be dynamically adjusted, the delivery efficiency can be improved to the greatest extent, the delivery time can be shortened, and the logistics cost can be reduced. The inventory information is monitored in real time, the visibility of the inventory can be improved, and the inventory can be managed more scientifically.

The invention relates to the technical field of power battery testing, in particular to a BMS function testing system and method for a new energy automobile. The method comprises the following steps: constructing battery pack structure model data according to battery pack CAD design drawing data; collecting vehicle working condition charging and discharging sample data; carrying out adaptive current excitation sequence processing according to the vehicle working condition charging and discharging sample data, and generating multi-working condition disturbance pulse excitation sequence data; performing disturbance magnetic field simulation on the battery pack structure model data through the multi-working-condition disturbance pulse excitation sequence data to obtain working condition test magnetic disturbance response data; and performing battery pack BMS monitoring data acquisition based on the working condition test magnetic disturbance response data, performing BMS current distribution monitoring performance evaluation, and generating BMS current monitoring performance evaluation data. By simulating current excitation and magnetic field response under multiple working conditions, comprehensive evaluation of the BMS performance is realized, and the test accuracy and efficiency are 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 relates to the technical field of relay protection, in particular to a power distribution network relay protection collaborative optimization method and system considering new energy, and the method comprises the steps: constructing a model architecture of a power distribution network; based on the new energy access characteristics, the topological structure of the power distribution network and the line parameters of the power distribution network, performing simulation and calculation on a short-circuit fault possibly occurring in the power distribution network to obtain a short-circuit current calculation result; determining relay protection equipment of the power distribution network according to the topological structure of the power distribution network, and determining a protection constant value of each protection section of the relay protection equipment according to a short-circuit current calculation result and a protection constant value setting principle; establishing an optimization model to update an iteration decision variable, and obtaining an optimal solution of the decision variable; and adjusting the configuration of the relay protection equipment according to the optimal solution of the decision variable. By comprehensively considering the influence of new energy access on short-circuit current distribution, the reliability and effectiveness of a relay protection system are improved, and the economic operation efficiency of a power distribution network is enhanced.

The present application provides a negative electrode sheet for a lithium metal battery, an electrode assembly, a lithium metal battery, and an electronic device. The negative electrode sheet comprises a carbon-based current collector, and a first metal lithium-replenishing layer and a second metal lithium-replenishing layer which are respectively provided on two sides of the carbon-based current collector. Compared with a conventional metal negative electrode sheet, the carbon-based current collector comprised in the negative electrode sheet can significantly reduce the weight of the negative electrode sheet, thereby significantly improving the gravimetric energy density of the lithium metal battery. The first metal lithium-replenishing layer and the second metal lithium-replenishing layer are respectively provided on the two sides of the carbon-based current collector; when tabs are welded to the negative electrode sheet, due to the existence of the carbon-based current collector, the negative electrode sheet will not be burned through, avoiding non-uniform current distribution between the negative electrode sheet and other parts of the battery, avoiding slowing down the electrochemical reaction rate in certain areas, avoiding reduction of the capacity of the lithium metal battery.

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 discloses a battery pole piece, a manufacturing method thereof and a secondary battery. The pole piece comprises a current collector and an active material layer arranged on at least one surface of the current collector, the middle part of the pole piece is provided with a pole lug groove, the pole lug groove is a non-through groove along the Y direction, the pole lug groove is provided with a pole lug, and the pole lug comprises a connecting section positioned in the pole piece and an exposed section positioned outside the pole piece. Compared with the prior art, the non-through tab groove is formed in the middle of the pole piece, and the tab is arranged in the tab groove, so that the surrounding area of the tab can be coated with the active material, the space utilization rate of the pole piece is remarkably improved, more active substances can be accommodated under the same volume, and the energy density of the battery is effectively improved; meanwhile, as the coating area of the active material is increased, the current distribution is more uniform, the internal resistance is further reduced, and the rate capability of the battery 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 discloses a direct-current power optimization control method of a multi-port energy converter and a related device, and belongs to the technical field of converters. According to the method, partition control is carried out according to the load power range, the most suitable power supply mode is automatically matched in different load power intervals, the system can dynamically adapt to different power demand scenes, resource configuration is optimized, and efficient and stable power supply under various working conditions is ensured. Meanwhile, an improved droop control method is adopted, current distribution between parallel power supplies / modules is balanced, a droop coefficient is dynamically adjusted by considering a temperature influence factor, the problem of uneven thermal stress distribution is effectively relieved, the service life of equipment is prolonged, and meanwhile the overall energy efficiency and thermal management performance are improved. The overall conversion efficiency of the multi-power-supply / module parallel system in different load intervals is improved, and the reliability of the whole power supply system is improved.

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.

The invention relates to a semiconductor power module, and belongs to the technical field of device packaging. The module comprises a heat dissipation bottom plate, an insulation substrate, a metal layer, a power terminal, a signal terminal, a chip and a temperature sensing resistor. The insulating substrate is arranged on the surface of the heat dissipation bottom plate, the metal layer is arranged on the surface of the insulating substrate, and the power terminal, the signal terminal, the chip and the temperature sensing resistor are all arranged on the insulating substrate and electrically connected with the metal layer. Part of chips form a lower bridge in the middle area of the insulating substrate, the other part of chips form upper bridges on the two sides of the lower bridge, and the number of the upper bridge chips is equal to that of the lower bridge chips. The power terminals, the upper bridge chip and the lower bridge chip jointly form power loops which are equal in size and opposite in direction in the power module. According to the invention, the problems of over-high temperature of individual chips caused by non-uniform current distribution and electromagnetic interference caused by over-large parasitic parameters can be solved.

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 a cross-domain data fusion method and system for distribution network middle stations based on a knowledge graph, and particularly relates to the technical field of data processing and fusion based on the knowledge graph. Firstly, intelligent gateway equipment is adopted to collect operation, fault, maintenance and other data of all systems and all lines related to distribution network operation, the data are transmitted to a data processing and storage module through a 5G communication protocol port transmission technology, and data cleaning, data integration, data conversion and other operations are carried out; classifying and storing the data, and then constructing a mapping knowledge domain in the distribution network; according to the method, a 5G communication protocol port transmission technology and a composite model are specifically adopted to perform knowledge extraction and knowledge fusion of graph construction, so that the technical problems of data islands and other data processing in a distribution network are solved, data sharing, service sharing and resource integration are effectively realized, and the reliability of the distribution network is improved. The problem that data between distributed systems in the current distribution network field is difficult to cooperate is solved, semantic integration and sharing of data between multiple systems are achieved, and the operation and maintenance efficiency and the intelligent level of a power distribution network are improved.

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.