169 results about "Current distribution" patented technology

The application provides an inverse-conducting insulated gate bipolar transistor and a preparation method thereof, and belongs to the technical field of power semiconductor devices, and comprises: a first groove is a gate groove, a second groove is an emitter groove, and a third groove is an ineffective gate groove; in the lateral direction parallel to the cell surface, the first groove, the second groove and the third groove are sequentially and spacedly arranged, and the first groove and the second groove are connected through a fourth groove, and the fourth groove is a gate groove; in the longitudinal direction, the second groove is located between two adjacent fourth grooves. The beneficial effects are as follows: the gate groove and the ineffective gate groove are connected through the lateral gate groove, the forward conduction voltage drop and the conduction loss of the device are reduced; the current channel is increased, the current distribution is more uniform, the heat loss is reduced, the reliability and the power density of the device are improved; the emitter groove is used for repeatedly arranging the polysilicon gate and the metal gate in the lateral and longitudinal directions, the regularly arranged diodes and Schottky diodes are formed, and the reverse diode current distribution is more uniform.

The utility model relates to PCB board production equipment technical field, the technical problem that the utility model solves is uneven current distribution, rework rate is too high. In order to solve the above technical problem, the utility model provides a kind of copper tank for the copper of PCB board immersion copper. The utility model includes: rectifier;Outer tank body is equipped with medicine water and conductive roller;Soaking tank is located in outer tank body;Conveying assembly is located in soaking tank, and conveying assembly includes upper roller piece group and the lower roller piece group corresponding with being equipped in upper roller piece group below;Anode plate assembly is located in soaking tank;Anode plate assembly includes upper conductive plate and the lower conductive plate corresponding with being equipped in upper conductive plate below;Upper conductive plate is located in upper roller piece group;Positive terminal is connected with upper conductive plate, lower conductive plate, and negative terminal is connected with conductive roller;Rectifier, conductive roller, circuit board, upper conductive plate, lower conductive plate and soaking liquid constitute circuit loop. The utility model current distribution is more uniform, and rework is reduced.

The application relates to a hybrid inverter two-way battery off-grid power distribution method, which is applied to the field of energy storage system control and comprises the following steps: judging the working mode of a two-way battery, and calculating the total effective capacity of the two-way battery according to the working mode; calculating a current distribution proportion coefficient of the two-way battery according to the total effective capacity and the real-time acquired terminal voltage of the two-way battery; and distributing the total current reference value of the real-time acquired bus voltage to the two-way battery according to the current distribution proportion coefficient, so as to realize off-grid power distribution of the two-way battery. The application has the technical effect that the total power of the two-way battery can be accurately and quickly distributed in an off-grid scene, and the mutation of the load power demand can be matched in real time.

This application provides a method, apparatus, device, and storage medium for controlling stray current in pipelines, relating to the field of stray current protection technology. The method includes: acquiring real-time stray current distribution information for each pipeline section along the pipeline. The distribution information includes the stray current intensity flowing through each pipeline section. The distribution information is input into a preset first model, and the target grounding electrode is output from the candidate grounding electrodes corresponding to each pipeline section. The first model is constructed based on historical detection information and the equivalent circuit principle of stray current diversion and grounding, used to determine the target grounding electrode. The historical detection information includes historical stray current distribution information and corresponding historical target grounding electrodes. The target grounding electrode is then activated, used to guide the stray current into the soil.

The application belongs to the technical field of axial flux motors, and particularly relates to a coreless PCB stator winding for an axial flux motor, a stator assembly and an axial flux motor, wherein the coreless PCB stator winding comprises at least one winding unit, the winding unit comprises a first annular substrate and a second annular substrate, and the front surface and the back surface of the two annular substrates jointly form four conductor layers, each conductor layer has conductor wires constituting a planar coil in a corresponding sector; the planar coil comprises a conductor action edge and a conductor connection edge, and the planar coils in different conductor layers are staggered and arranged in a mirror image, staggered and filled with a complementary position; the conductor action edge in the third conductor layer is located in a gap region between the front two planar coils; the application can improve the conductor utilization rate in the effective magnetic flux cutting region, and improve the interlayer conduction and current distribution performance of the multi-layer winding.

This invention discloses a near-field scanning detection method based on active learning to obtain conducted coupling paths. The method includes: constructing a near-field scanning detection platform; placing the circuit board under test (PCB) in a microwave anechoic chamber; and using the near-field scanning detection platform directly above the PCB to perform detection; obtaining the detection results using an active learning-based near-field scanning method; and obtaining a near-field current distribution map on the PCB at continuous time intervals based on the detection results, thereby realizing the detection of conducted coupling paths. This invention utilizes active machine learning methods to achieve more efficient near-field scanning detection, concentrating scanning points in areas with strong currents and accurately reconstructing the actual current changes of the PCB using the scan results of sparse points, greatly improving detection efficiency. By using near-field scanning detection to reconstruct the current changes on the circuit board, the coupling paths of conducted interference currents on the PCB can be quickly analyzed, meeting the requirements for detecting electromagnetic interference in systems in practical engineering.

This invention belongs to the field of computational electromagnetics numerical simulation and provides a simulation method for electromagnetic scattering of thin-coated targets based on Schur complement preconditions. First, for the IBC scattering target to be solved, equivalent surface current and equivalent surface magnetic current are introduced as independent unknowns. The electromagnetic scattering solution equation is established using SDIE and then discretized. Next, the impedance matrix is ​​decomposed into near-field and far-field matrices using an octree structure. For the near-field matrix, key operator sub-blocks are explicitly assembled and extracted. Then, approximate operators in block diagonal form and Schur complement operators are constructed and approximately inverted. Simultaneously, the diagonal product of intermediate blocks is pre-calculated and stored based on the approximate operators. Finally, the constructed preconditions are applied to the GMRES iterative solver. When the iteration error reaches the preset convergence criterion, the current and magnetic current distributions on the target surface are output. Further calculations of radiation characteristic parameters such as the target's radar cross section are then performed, achieving low-cost, high-efficiency, and easily parallelizable electromagnetic simulation solutions.

This utility model relates to the field of aluminum electrolysis equipment technology, and in particular to a heat insulation sleeve for the cathode steel rod head of an aluminum electrolysis cell, comprising: a main support part and side support parts; the main support part is a rectangular plate structure; the side support parts are rectangular plate structures; one end of the side support part in the width direction is set on one end of the main support part in the width direction; one end of the side support part in the length direction is flush with one end of the main support part in the length direction; there are two side support parts; the two side support parts are symmetrically arranged at both ends of the main support part in the width direction; the side support parts are perpendicular to the main support part; the two side support parts and the main support part are constructed into a U-shaped groove; the length of the main support part is twice the length of the side support parts; a heat insulation layer one is provided on the inner side of the main support part; a heat insulation layer two is provided on the inner side of the side support parts. This utility model improves the convenience of installation and disassembly; facilitates testing the current distribution and temperature of the cathode steel rod; and is low in cost and simple to maintain.

This invention relates to the field of rice storage, and more particularly to a sampling device for real-time monitoring of the storage quality of rice in cold regions. The device involves vertically inserting a tube into a rice pile. Each layer of the rice pile is then loaded into the sampling chamber of the tube while maintaining its original distribution. A partition plate separates the rice pile layers within the sampling chamber, preserving their current distribution and completing the sampling process. Furthermore, an extraction tube, through a moisture-absorbing and breathable component, can extract the ambient gas surrounding each layer of the rice pile, indicating the moisture content of the air in each layer. This invention solves the technical problems of existing sampling equipment being unable to penetrate the entire rice pile for three-dimensional sampling, and the destruction of the original layered distribution characteristics of the rice pile during sampling, thus affecting the accuracy of sample testing.

The application relates to the technical field of LED circuit, in particular to a lamp color adjusting circuit with a thyristor light modulation module, which comprises a rectifier circuit, a multi-grade dial code color adjusting circuit, a frequency flash removing circuit, a thyristor current discharge circuit and a constant current light modulation circuit. The rectifier circuit converts an alternating current power supply into a direct current voltage to supply power to a circuit system. The multi-grade dial code color adjusting circuit adjusts the current distribution of LED lamp beads through a dial code switch and a second group of resistors, generates a color adjusting signal, carries out low-pass filtering and dynamic compensation on the color adjusting signal, and outputs a pure control signal to the thyristor current discharge circuit. The thyristor current discharge circuit adjusts a current path according to the control signal to provide a smooth and adaptive power supply for the constant current light modulation circuit. The constant current light modulation circuit realizes constant current output. The design significantly reduces the hardware cost and the complexity of the circuit system, effectively suppresses electromagnetic interference in combination with the low-frequency modulation characteristics of the thyristor, and realizes the balance between light modulation precision and the stability of the circuit system.

This invention discloses a design method for parallel current sharing of BOOST multiphase interleaved silicon carbide single transistors. It identifies key parasitic parameters by building a dual-pulse simulation platform, completes device layout in conjunction with the overall system structure, uses PCB symmetry and copper layer stacking to control parasitic parameter consistency, and forms a design closed loop through dual-pulse and steady-state thermal testing. This effectively solves the problem of poor current sharing in parallel silicon carbide single transistors. Furthermore, this method ensures balanced current distribution during switching transients and conduction steady states, eliminates current sharing failures caused by parasitic parameter mismatch, fully utilizes the performance of silicon carbide single transistors without requiring amplification device margins, flexibly adapts to the overall system layout, improves space utilization, optimizes system efficiency, reduces design costs and redundancy, and achieves a reliable, efficient, and highly adaptable design for parallel current sharing of BOOST multiphase interleaved silicon carbide single transistors.

The application provides a simulation method and device for the moisture aging electrical performance of a zinc oxide varistor, comprising: establishing a grain boundary micro-topology structure of the zinc oxide varistor, the grain boundary micro-topology structure comprising a plurality of conductive grains and grain boundaries between adjacent grains; establishing corresponding equivalent branches for the grain boundaries, mapping the grain boundary micro-topology structure into an electrical network model composed of a plurality of conductive nodes and equivalent branches; determining physical parameters representing moisture degradation according to a moisture aging test of the zinc oxide varistor, and updating the electrical network model by adjusting the physical parameters while keeping the grain boundary micro-topology structure unchanged to obtain the voltage-current characteristic curve and micro-current distribution under the corresponding moisture state. The application realizes quantitative correlation between the moisture degradation state and the micro-grain boundary electrical characteristics, thereby realizing high-precision simulation of the voltage-current characteristic curve and micro-current distribution under the corresponding moisture state, and significantly improving the physical authenticity of the simulation results.

The application discloses a current sharing monitoring system of a direct-current controllable energy dissipation device and a voltage limiter column grouping method thereof, wherein the grouping method considers the number of voltage limiter columns of the direct-current controllable energy dissipation device, the current flowing through the voltage limiter when the protected equipment is overvoltage, and a current distribution coefficient, a single valve piece breakdown short circuit scenario of a voltage limiter column is simulated by using an electromagnetic transient simulation model, the voltage limiter column is grouped according to the current distribution under the scenario and the current distribution coefficient setting value, or the final grouping scheme is obtained by continuing to adjust and check through iteration, and then a current measuring device is configured for each group of voltage limiter columns according to the grouping scheme, so that current sharing monitoring calculation and logical judgment are realized. The application can reduce the cost of the current sharing monitoring system of the direct-current controllable energy dissipation device, and can reliably output an alarm signal when the current distribution coefficient is abnormal.

This invention provides a method and apparatus for distribution network planning, relating to the field of new energy power generation technology. The method for distribution network planning includes: acquiring current distribution network parameters; determining a two-layer model of the distribution network system based on these parameters; wherein the upper-layer model of the two-layer model is constructed based on new energy investment inputs, green certificate trading costs, and carbon emission trading costs, while the lower-layer model is constructed based on distribution network operation problems; transforming the opportunity constraints of the upper-layer model into deterministic constraints, and constructing KKT conditions based on the lower-layer model; merging the deterministic constraints, KKT conditions, and the original constraints of the lower-layer model into the upper-layer model to generate a solution model; and determining the optimal system planning and operation scheme for the current distribution network based on the solution model, and configuring the distribution network accordingly. This method enables distribution network planning and operation while simultaneously considering new energy unit investment decisions, carbon emission trading, and green electricity certificate trading.

A non-volatile memory system performs a sensing process for memory cells by sensing the memory cells multiple times to achieve multiple results for determining whether the memory cells are in a particular condition (e.g., a memory cell current distribution) in response to a same reference signal without adjusting the memory cell between the multiple times. The memory system determines whether the memory cells are in the particular condition based on whether a majority of the multiple results indicate that the memory cells are in the particular condition. In one embodiment, the system programs weight information into the non-volatile memory cells and performs vector-matrix multiplication using the weight information programmed in the non-volatile memory cells. The sensing the memory cells multiple times to achieve multiple results can be performed as part of a program verify process when programming weight information and / or as part of the vector-matrix multiplication.

This disclosure provides a semiconductor device and electronic device in which the drift region is made of AlN, which can improve the device's breakdown voltage or reduce the drift region thickness at the same breakdown voltage, thereby reducing on-resistance and epitaxial cost and difficulty. At least one of the following is formed between the drift region and the source metal through distributed polarization doping: an N+ type AlGaN current extension layer, a P- type body region, and an N+ type source ohmic contact region. Since the Al composition content in at least one of these three layers gradually changes away from the N++ type conductive substrate, a certain concentration of electrons or holes is induced through the polarization effect, which can increase the electron or hole concentration of the corresponding layer. That is, at least one layer is a high carrier concentration layer formed by unintentional doping, which can optimize current distribution and reduce device on-resistance. Since at least one of the above three layers is formed by distributed polarization doping, the carriers have higher mobility, avoiding the diffusion of dopants in high-temperature environments that could affect device performance.

This invention belongs to the field of internal transport barrier technology and discloses a method for actively controlling the internal transport barrier of a tokamak plasma. This invention actively controls the pressure and current distribution of the plasma through electron cyclotron waves or other auxiliary heating methods, thereby altering the stability of the neoclassical tearing mode and ultimately achieving a magnetic island-free internal transport barrier operation mode. The control strategy is simplified: it eliminates the need for real-time precise measurement of the radial position and phase of the magnetic island, and also eliminates the need for real-time feedback control of the electron cyclotron wave deposition position and timing; only the injection power of the electron cyclotron wave in the core needs to be adjusted, making the system operation simpler. It also boasts high energy efficiency: depositing electron cyclotron waves in the plasma core, where heating and current-driven absorption efficiency are high, thus requiring relatively low injection power and offering better economic benefits.

This utility model provides a corrosion-resistant shell structure for a marine engineering platform, relating to the field of marine engineering platform technology. It includes: a support column body, with two protective devices on its surface. Each of the two protective devices is filled with filler, and multiple buffer devices are provided on the surface of each of the two protective devices. In this utility model, the impact of waves and splashes first strikes the protective plate surface, where it is buffered by springs and dampers, reducing the impact on the support column body and enhancing the service life of the protection. An antibacterial layer is coated on the outer side of the arc-shaped hollow protective shell to inhibit microbial adhesion and metabolic corrosion, while a plasma-polymerized coating is coated on the inner side of the arc-shaped hollow protective shell to increase the pitting potential of the stainless steel. Combined with an electromagnetic energy storage device, dynamic potential compensation is achieved. Furthermore, the metal support rods filled inside the arc-shaped hollow protective shell reduce resistance and potential fluctuations, resulting in a more uniform current distribution.

The application discloses a cathode protection state evaluation method and system based on secondary current distribution, and relates to the technical field of pipeline corrosion prevention. Based on a drawn position slope curve diagram, the similarity of position slope curves under multiple test potentials is determined, and an optimal constant potential instrument output is found as a protection potential in combination with test potentials which can protect the pipeline and do not overprotect the pipeline. Test slopes of the protection potential at multiple time points are acquired, a change trend of the test slope of a test pile with time is determined through deep learning, and thus a part of the pipeline corresponding to the damaged test pile is found.

This invention discloses a terminal assembly, a battery cover, and a battery, comprising a terminal base, a conductive block, a fixing member, and at least two terminals. The conductive block is electrically connected to the terminal base; the terminals are fixedly disposed on the conductive block and electrically connected to the conductive block; the fixing member is connected to the terminals and used to fix the terminals to the conductive block. By providing at least two terminals, this invention allows different conductive wire terminals to be connected to different terminals respectively, avoiding the problems of increased contact resistance and uneven current distribution caused by multiple terminals stacked on a single terminal.

The application discloses a single-end protection method based on wavelet transform and pulse neural network, which comprises the following steps: collecting transient voltage and current signals of a single end of a direct-current distribution network in real time; performing multi-resolution decomposition on the collected transient waveforms by using wavelet transform to obtain detail coefficients and high-frequency energy spectrum under different scales; taking an input layer of the pulse neural network as an encoding layer, and converting the extracted continuous analog wavelet coefficients into discrete binary pulses; and finally inputting the generated pulse sequence into the pulse neural network to complete accurate classification of fault types and output corresponding relay protection tripping instructions. The application proposes a single-end protection method based on wavelet transform and pulse neural network for problems such as uncertain energy flow direction, complex mapping relationship between fault characteristics and fault types and the like caused by large access of distributed energy, and avoids strong dependence on accurate fault mathematical models and fixed protection thresholds.

This invention provides a reinforcement learning-based adaptive current distribution and global energy-saving control system for electrolytic aluminum production, relating to the field of electrolytic aluminum production control technology. It includes a sensing module, a reinforcement learning decision-making module, a collaborative control module, an execution module, and a closed-loop feedback module. The sensing module collects real-time operating parameters and anode current distribution data for the electrolytic aluminum series. The reinforcement learning decision-making module generates current distribution decisions based on the collected data using an improved reinforcement learning algorithm. The improved PPO reinforcement learning decision-making model constructed in this invention integrates non-contact magnetic coil measurement technology, solving the problems of low accuracy and poor stability of traditional contact measurement. Simultaneously, it accelerates model convergence through the GAE algorithm, achieving autonomous learning and dynamic optimization of current distribution decisions. This enables precise adaptation to the dynamic operating conditions of multi-field coupling in the electrolytic cell, ensuring a high degree of matching between current distribution and real-time cell conditions, thus improving control accuracy.

This invention relates to the field of cover plate technology, providing a battery cover plate and a power battery. The battery cover plate includes a cover plate body, terminals penetrating the cover plate body, and an upper plastic component. The terminals have an elliptical cross-section. The upper plastic component is provided with a relief structure for providing deformation compensation during the riveting of the terminals. By designing the relief structure, this invention provides release space for the riveting deformation of the terminals and riveting blocks. The relief structure can buffer the compressive stress during riveting, preventing the upper plastic component from cracking or breaking in areas of concentrated stress such as the front and sides of the riveting holes, ensuring the continuous effectiveness of the insulation function of the upper plastic component, and preventing internal short circuits in the battery due to insulation failure. Without increasing the number of terminals or expanding the overall size of the cover plate, the elliptical terminals can directly replace the traditional circular terminals, achieving a larger effective conductive cross-sectional area within the same installation boundary. At the same time, the current distribution within the elliptical cross-section is more uniform, reducing local current concentration phenomena.

The application discloses a multi-stage converter suitable for super-wide-range high-voltage input and multi-channel output, and belongs to the field of DC-DC converters of electric energy conversion devices. The multi-stage converter comprises two function modules connected in cascade. The first function module is composed of a Ladder type switched capacitor converter and a synchronous rectification Buck converter connected in cascade, wherein the Ladder type switched capacitor converter adopts an intermediate capacitor of a switched capacitor topological structure as an output to realize fixed step-down ratio step-down, thereby ensuring uniform current distribution and reducing device voltage stress; the synchronous rectification Buck converter adopts input voltage feedforward variable duty ratio control to convert super-wide-range high-voltage input into a relatively narrow-range intermediate bus voltage. The second function module is composed of a half-bridge LLC resonant converter and a multi-channel non-isolated DC-DC converter, the LLC resonant converter adopts open-loop fixed-frequency control, and the multi-channel secondary sides are respectively configured with non-isolated DC-DC converters to independently carry out closed-loop control on each channel output. The application effectively solves the problems of high device voltage stress, limit duty ratio control and poor multi-channel output cross regulation under the condition of super-wide-range high-voltage input (such as DC 320V-6500V), realizes multi-channel isolated regulated output, and improves system efficiency and reliability.

This invention provides a comprehensive evaluation method for the mid-frequency performance of a filter field grounding system, belonging to the field of power grid equipment technology. The invention extracts the resonant frequency distribution by inputting a wideband impedance spectrum into an artificial intelligence frequency domain response identification model based on a coarse spatiotemporal attention mechanism. It then dynamically adjusts the spatial receptive field parameters according to the resonant frequency offset function. A three-dimensional electromagnetic field simulation model is established based on soil frequency domain parameters, and the ground potential and current density distribution are calculated using the radial basis function collocation method and the fast multipole algorithm. The entropy value of current distribution uniformity and the Gini coefficient are calculated to identify current concentration areas and assess local overheating risk. Finally, the analytic hierarchy process (AHP) is used to dynamically weight and comprehensively score indicators such as impedance peak value, resonant frequency, ground potential gradient, current uniformity, and overheating risk. This invention solves the technical problem of inaccurate performance evaluation of filter field grounding systems under mid-frequency impulse conditions.

The application discloses a metal antenna radiation structure and an antenna array, and relates to the technical field of communication. In the main body radiation structure, more than two levels of layered structures are arranged along the height direction, the lateral size of each layer is gradually increased from bottom to top, a stepped expansion amplification structure is formed, gradual transition and impedance smooth change of electromagnetic energy in the vertical direction are realized, effective radiation is realized without loading high-loss dielectric materials, and the problem of efficiency reduction caused by dielectric loss is reduced. The multi-stage metal gradual expansion structure can compress the overall height under the premise of guaranteeing the radiation performance and bandwidth characteristics, optimize the current distribution, enhance the directivity control ability, provide a structural basis for compact arrangement and suppression of grating lobes of the array, and is suitable for low-profile, miniaturization and high-efficiency application scenarios. The technical problems that the radiation efficiency is insufficient and the structural thickness is difficult to be considered under the condition of low profile are solved, and the technical effects that high-efficiency radiation and structural compactness are realized while reducing loss are achieved.

This application relates to the field of microgrid technology and discloses a method and system for setting droop control coefficients based on a physical information neural network. The method first obtains the target steady-state output current to be set for each parallel converter in a multi-source parallel DC microgrid; then, it inputs the target steady-state output current into a pre-trained physical information neural network surrogate model. This surrogate model is an inverse mapping model that uses the converter's steady-state output current as input features and the droop control coefficient as the output target. Its training loss function includes a physical constraint loss term constructed based on Kirchhoff's voltage law for the DC microgrid topology; finally, it outputs the corresponding droop control coefficients through model forward propagation, thus completing the parameter setting. This application improves the accuracy and efficiency of droop control coefficient setting, ensuring the accuracy of current distribution and operational stability of the DC microgrid.

This invention discloses a distribution network interval power flow analysis method based on improved affine arithmetic with spatiotemporal correlation. The method includes: establishing a basic distribution network model; constructing a comprehensive sensitivity index to partition the distribution network; establishing a spatiotemporal correlated multi-noise affine model; constructing improved affine arithmetic rules based on the spatiotemporal correlated multi-noise affine model; establishing a mapping relationship between node current disturbances and node voltage disturbances, and substituting the spatiotemporal correlated multi-noise affine model to obtain the affine expressions for node voltage and branch power flow; estimating the upper bound of the nonlinear residual term in power flow propagation, and introducing an auxiliary residual noise term for bounded encapsulation to obtain the interval results for the voltage amplitude, phase angle, and branch power flow of each node. This invention overcomes the deficiency of current distribution network interval power flow analysis that ignores the spatiotemporal correlation characteristics of uncertainty, while improving computational accuracy and solution efficiency, providing theoretical support for subsequent distribution network security assessment.

This invention relates to the field of power system fault diagnosis technology, specifically a method for accurate location and isolation of ground fault sections based on multi-edge terminal data association. It includes collecting transient current and voltage signals from multiple edge terminals in the distribution network, extracting high-frequency transient feature values, and combining them with a distributed computing model to generate a transient feature dataset, a candidate set of fault branches, and fault section location results. Finally, it generates isolation commands to achieve closed-loop control. This invention, by fusing transient signal frequency domain features, zero-sequence current distribution patterns, and fault phase abrupt change information, constructs a dynamic fault discrimination model, significantly improving the identification accuracy of intermittent arc grounding faults and high-resistance grounding faults, enhancing the self-healing capability of the distribution network, and ensuring power supply reliability.

The application provides a commutation soft switching system for treating current imbalance of a power distribution network and an evaluation method. The commutation soft switching system combines a low-voltage commutation device and an intelligent soft switching device, realizes current flow transfer between different phases, flexibly adjusts the current flow transfer and current distribution between phases, is beneficial to balancing the current difference between three phases of the power distribution network, thereby improving the output efficiency of the power distribution transformer and reducing network loss. The application builds an optimization model based on network flow constraints, solves the optimization model with the minimum current imbalance degree as the target, obtains outgoing currents of each phase and outgoing average currents of three phases, and obtains an index for evaluating the commutation soft switching system for treating the current imbalance problem in the power distribution network through the size of the outgoing currents of each phase and the outgoing average currents of three phases.