118 results about "Load loss" patented technology

The invention relates to the technical field of power system automation, in particular to a monitoring and maintenance system and method for a transformer substation. The system comprises a quantitative classification module, a difference analysis module and a grading adjustment module. Equipment in a transformer substation is classified through the quantitative classification module, correction parameters such as aging and load loss are introduced for single-equipment monitoring through the difference analysis module, misjudgment and missed judgment caused by equipment state changes are reduced by combining multi-level threshold values, associated equipment is modeled through a GNN model, neighbor states are aggregated, the equipment health degree is output, and the equipment quality is improved. The method comprises the following steps of: quantifying a fault propagation probability, pre-warning cascading fault risks in advance, and adjusting a threshold value of a single device in a linkage manner while a hierarchical adjustment module takes risk response measures, so that single device monitoring is adaptively matched with an associated device risk state, full-coverage accurate monitoring is realized, and local and global risks are considered.

The embodiment of the invention provides a transformer loss monitoring method and a transformer loss monitoring system, and the monitoring method comprises the steps: dynamically updating winding resistance, excitation reactance and iron core magnetic conductivity according to an electromagnetic parameter and a temperature parameter in a state vector space through employing a complex frequency domain parameter identification algorithm which introduces a fusion expansion Cole-Cole model; the no-load loss and the load loss are decoupled through an improved all-electric difference method, the dynamically updated excitation reactance and the iron core magnetic conductivity are used for decoupling the no-load loss, and the dynamically updated winding resistor is used for decoupling the load loss; and taking the decoupled loss data and the associated parameters in the state vector space as the input of an LSTM-Transform hybrid model loaded on the edge calculation module, and predicting and outputting the load loss trend in the future time period. According to the transformer loss monitoring method, the real-time performance, the accuracy and the adaptability of transformer loss monitoring are improved.

The invention discloses a power distribution network reconstruction decision risk assessment method and system based on state deduction and rule reasoning, and a medium, and the method comprises the steps: carrying out the static power flow and voltage checking of an established reconstruction decision, and determining that the established reconstruction decision is a high risk if the line power flow and / or node voltage are / is out of limit; otherwise, constructing model input based on the node characteristics at the current moment and in a certain historical time period before the current moment and the time sequence data of the topological structure of the power distribution network, inputting the model input to a trained space-time diagram deduction model, and deducing to obtain time sequence data of each node voltage and each line power flow in a future preset time period; evaluating an expected risk of the established reconstruction decision by using three indexes of a line overload risk, a voltage out-of-limit risk and a load loss risk; and reasoning the risk level of the established reconstruction decision by using the constructed rule reasoning model. According to the method, the risk deduction result is ensured to conform to the physical characteristics of the power grid, and the interpretability and transparency of the model can be remarkably improved.

The invention provides a hysteresis loop analysis method for a transformer no-load loss test, and belongs to the technical field of transformers. Exciting voltage and current signals are collected in a transformer no-load state, and an active filter is used for carrying out digital filtering processing to eliminate harmonic interference; a data corresponding relation between magnetic flux density and magnetic field intensity is established through a digital integration algorithm and a magnetic field intensity calculation formula to form original hysteresis data, the original hysteresis data is processed by using a hysteresis loop optimization model, a complete hysteresis loop curve is generated, and the hysteresis loop area is calculated. According to the hysteresis loop area, the hysteresis loss power density is calculated through the iron loss calculation function, the total value of the transformer no-load loss is obtained by combining the eddy current loss calculation result, and the technical problems that the hysteresis loop reconstruction precision is not high and the complex hysteresis phenomenon cannot be adapted in the transformer no-load loss test are solved.

The invention discloses an analysis method and system for energy conservation and loss reduction of transformers, and the method comprises the steps: collecting the standby state data of a transformer group, recognizing a high-loss unit, and predicting the parameter drift trend of the high-loss unit; acquiring an electromagnetic impact strength signal in a working state; the parameter drift trend and the electromagnetic impact strength signal are fused, and the collaborative imbalance risk is evaluated; and according to a risk assessment result and a risk cause, dynamic voltage regulation and load balancing optimization are adaptively executed. The cross-working-condition correlation analysis and closed-loop control are carried out on the transformer group serving as the power supply core, so that the standby no-load loss can be effectively reduced, the equipment aging can be delayed, the operation cost can be reduced, the long-term stability and reliability of the power supply system can be ensured, and the method can be widely applied to the industrial fields of pulsed electric fields, precision manufacturing and the like.

The application provides an oil-immersed transformer, which comprises an oil tank body, a transformer body and a heat dissipation device, the oil tank body is made of aluminum alloy material and comprises an oil tank cover plate, an oil tank shell wall, an oil tank bottom plate and two oil tank fixing seats, the transformer body is arranged inside a space surrounded by the oil tank body, the transformer body comprises a planar winding core, a high-voltage coil, a low-voltage coil, an upper clamp and a lower clamp, the upper clamp and the lower clamp are made of aluminum alloy material, the heat dissipation device is fixed to the outer wall of the oil tank shell wall, and the heat dissipation device has the advantages of small density, light weight, strong heat dissipation capacity, non-magnetic conductivity and high mechanical strength, so that the volume of the transformer is reduced, the weight of the transformer is reduced, the heat dissipation effect is good, and the operation state is stable; and the planar winding core structure is adopted, so that the no-load loss and the no-load current are low, the structure is compact and reasonable, and the operation reliability of the product is improved.

The invention belongs to the technical field of transformer insulation loss and life evaluation, and discloses a power transformer thermal life loss calculation method, system, device and medium, and the method comprises the steps: calculating the bidirectional load rate when a transformer is connected with distributed new energy, and judging the current power flow operation state of the transformer; obtaining a rated loss parameter of the transformer under a rated condition, and calculating the load loss of the transformer in combination with a harmonic loss factor corresponding to the transformer under the bidirectional power flow; voltage per unit values of the high-voltage side and the low-voltage side of the transformer are obtained, and the no-load loss of the transformer is calculated in combination with the iron core loss factor of the transformer; calculating the hot spot temperature of the transformer under the power flow switching condition; and calculating the relative aging rate of the transformer. The method is suitable for calculating the hot-spot temperature and the insulation life loss of the transformer in the scene of transformer power flow switching caused by high-proportion new energy penetration, the hot-spot temperature and the relative thermal life loss of the transformer under the condition of power flow reversal can be predicted, and operation and maintenance management is facilitated.

The invention relates to the technical field of electrical engineering, and discloses a voltage transformer, a design method and device thereof and a storage medium, and the method comprises the steps: determining the size of an iron core, and the electrical parameters of a primary side winding and a secondary side winding according to the electrical performance parameters and space limitation conditions of a target voltage transformer; calculating no-load loss, no-load magnetization and no-load current of the target voltage transformer based on the ferromagnetic material attribute parameters and the iron core size; determining a leakage reactance value reduced to a secondary side and total resistance of the winding according to the winding structure parameters; establishing an initial three-dimensional finite element simulation model of the voltage transformer based on the iron core size information and the winding parameters; determining a no-load error and a load error of the voltage transformer based on the no-load loss, the no-load magnetization, the leakage reactance value, the total winding resistance and the winding structure parameters; and performing feedback optimization on the initial simulation model based on the no-load error and the load error to obtain a target three-dimensional finite element simulation model, and manufacturing a target voltage transformer based on the simulation model.

The application discloses a variable-load super-large capacity dry-type transformer, relates to the related technical field of dry-type transformers, and comprises three groups of main iron core columns and three groups of auxiliary iron core columns, wherein the main iron core column section is provided in a stepped shape, the inside of the main iron core column is stacked by three layers of amorphous alloy strips, the thickness of the middle layer of the three layers of amorphous alloy strips is 1.2-1.5 times that of the two side layers, and the lamination groups in the inside of the auxiliary iron core column are provided with independent lap pieces at the joints. The application realizes uniform magnetic flux density distribution and single-column capacity improvement by combining the stepped section of the three groups of main iron core columns with the magnetic yoke which is thin at the top and thick at the bottom, solves the problems that the single capacity of the traditional dry-type transformer is limited and the whole machine needs to be replaced for capacity expansion, reduces the occupied volume through modular splicing, increases the capacity of a single group of iron core columns, and reduces the no-load loss.

The application belongs to the technical field of power distribution network automation, and particularly relates to a power distribution transformer intelligent regulation and control method and system based on energy efficiency evaluation, which comprises the following steps: collecting the low-voltage side current, rated current, no-load loss and load loss of a power distribution transformer, and calculating the load rate; obtaining the fluctuation intensity according to the standard deviation of the load rate in a sliding window, and obtaining the change gradient by subtracting the load rates at adjacent time points; obtaining the direction consistency index according to the consistent degree of the directions of the change gradient in a preset number of steps; calculating the noise covariance according to the fluctuation intensity and the direction consistency index, and obtaining the smoothed load rate by substituting the Kalman filter equation; dynamically determining the threshold step number according to the direction consistency index, calculating the smoothed total loss, and determining the preset energy efficiency threshold according to the no-load loss and the load loss. The application reduces the tap changer regulation frequency and prolongs the service life of the contact.

The invention discloses a transformer design method and system based on a hierarchical genetic algorithm and a medium, and belongs to the field of transformer design. The method comprises the steps that a structural hierarchical model of an amorphous alloy three-dimensional roll iron core transformer is constructed based on transformer parameters; inputting the structure layering model into a preset multi-physics field coupling simulation model, calculating iron core no-load loss power and winding load loss power, and determining a simulation temperature field in combination with the amorphous alloy iron core thermal conductivity and a dynamically calibrated boundary convective heat transfer coefficient; according to the sequence of the three-dimensional roll iron core layer, the winding layer and the oil duct layer, hierarchical genetic algorithm optimization is executed to obtain an optimization scheme, iterative simulation is conducted on the optimization scheme until an obtained simulation result meets a first preset condition, and the amorphous alloy three-dimensional roll iron core transformer is constructed based on the determined target structure parameters. And the design rationality and the operation safety of the amorphous alloy three-dimensional roll iron core transformer can be improved.

The invention relates to the technical field of power supplies, and discloses a synchronous rectification control circuit and a synchronous rectification power supply device, and the circuit comprises a power conversion module, an output current sampling module, and a PWM controller. The power conversion module comprises a follow current switch tube which is connected in parallel with two ends of a load. The output current sampling module is connected in series in a secondary winding loop and is used for collecting output current flowing through the secondary winding loop and generating an output current signal; the PWM controller is connected with the output current sampling module and is used for driving the follow current switch tube, the PWM controller is configured to compare the output current signal with a preset threshold value, and when the output current signal is greater than or equal to the preset threshold value, a first group of PWM control signals is generated to drive the follow current switch tube; and when the output current signal is smaller than the preset threshold value, stopping driving the follow current switch tube. According to the invention, no-load loss can be reduced, and the requirements of electronic products for high power density and low loss can be met.

The invention belongs to the field of electric power, and discloses a transformer loss optimization method, device and equipment and a storage medium, and the method comprises the steps: taking the minimization of the total loss value of a transformer as a target to construct an optimization function, and the total loss value comprises the no-load loss and load loss of the transformer; generating at least one constraint condition according to the electrical parameter requirement of the transformer, and generating a target function by taking the generated constraint condition as a penalty function and an optimization function; constructing a loss optimization model of the transformer; the loss optimization model is used for determining a target structure parameter combination, and the structure parameters contained in the target structure parameter combination comprise iron core stack thickness, low-voltage winding layer number, high-voltage winding width, high-voltage winding thickness, low-voltage winding width and low-voltage winding thickness; solving the loss optimization model according to a particle swarm optimization algorithm; each particle in the solving process corresponds to a structure parameter combination, and the structure parameter combination which does not conform to at least one constraint condition enables the penalty function value of the penalty function to shift.

The application relates to the technical field of power supply, and discloses a synchronous rectification control circuit and a synchronous rectification power supply device, which comprise a power conversion module, an output current sampling module and a PWM controller; the power conversion module comprises a freewheeling switch tube and is connected in parallel at two ends of a load; the output current sampling module is connected in series in a secondary winding loop, is used for collecting an output current flowing through the secondary winding loop, and generates an output current signal; the PWM controller is connected with the output current sampling module and is used for driving the freewheeling switch tube; the PWM controller is configured to compare the output current signal with a preset threshold value, generate a first group of PWM control signals when the output current signal is greater than or equal to the preset threshold value, and drive the freewheeling switch tube; and stop driving the freewheeling switch tube when the output current signal is less than the preset threshold value. The application can reduce no-load loss and adapt to the demand of electronic products for high power density and low loss.

The present application relates to a transformer and a transformer system. The transformer includes an iron core, a winding, a through-the-window lead, and a compensation coil. The compensation coil surrounds an iron core side yoke arranged on the iron core. The terminals of the compensation coil and the through-the-window lead on the same side of the iron core have the same polarity, and the second end of the through-the-window lead is connected to a terminal of the same polarity in the compensation coil. The first end of the winding is arranged on the first side of the iron core, and the second end of the winding is led out to the second side of the iron core through the through-the-window lead, which saves the layout space of the transformer. The through-the-window lead and the compensation coil both induce an electromotive force. The terminals of the compensation coil and the through-the-window lead on the same side of the iron core have the same polarity, and the second end of the through-the-window lead is connected to a terminal of the same polarity in the compensation coil, so that the electromotive force induced by the through-the-window lead and the compensation coil can be offset, eliminating the zero-sequence current of the transformer, avoiding the problems of transformer no-load loss, high noise and vibration levels, local overheating, etc. caused by the zero-sequence current, and improving the reliability of the transformer.

This application discloses a primary and secondary equipment fusion compartment transfer system and method, relating to the field of substation renovation. The method includes a fusion compartment, connecting cables, and flexible cables. The fusion compartment includes primary and secondary equipment. One end of the connecting cable is connected to the busbar of the 10kV switchgear to be renovated in the substation. The other end of the connecting cable is connected to the main and secondary cabinets of the primary equipment. One end of the flexible cable is connected to the 10kV feeder cabinet of the primary equipment. The other end of the flexible cable is laid within a set range of the terminal pole of the line to be renovated. The flexible cable is used to reconnect the line to be renovated. The secondary equipment is used to protect the main transformer and switchgear of the substation. This application enables substation renovation without load loss and without power outage.

The application provides a method and system for separating and measuring AC copper loss and iron loss of a motor, comprising: manufacturing a partial stator body of an N-line and 2N-line motor per slot as a test object; testing total loss data and external circuit characteristic parameters of the partial stator body per slot under a load operation; obtaining a difference value of AC copper loss; correcting a simulation model of AC copper loss of the motor by using the obtained difference value of AC copper loss, and outputting AC copper loss of the motor per slot under different rotating speeds and different torques; performing no-load testing by using a non-magnetic rotor to obtain no-load loss; obtaining iron core loss according to the total loss, copper loss and no-load loss obtained by testing the N-line and 2N-line stator; correcting an iron core loss simulation model of the motor by using the obtained iron core loss value, and outputting the iron core loss of the motor per slot under different rotating speeds and different torques. The application can separate and calculate the AC copper loss and the iron core loss of the motor.

The application discloses an analysis method and system for energy saving and loss reduction of a transformer, comprising: collecting standby state data of a transformer group, identifying a high-loss unit and predicting a parameter drift trend thereof; acquiring an electromagnetic shock intensity signal in a working state; fusing the parameter drift trend and the electromagnetic shock intensity signal, evaluating a risk of synergistic disorder; and adaptively performing dynamic voltage regulation and load balancing optimization according to a risk evaluation result and a risk cause. Through cross-condition correlation analysis and closed-loop control on the transformer group as a power supply core, the application not only can effectively reduce standby no-load loss and delay equipment aging, reduce operation cost, but also can ensure long-term stability and reliability of a power supply system, and can be widely applied to industrial fields such as pulse electric fields and precision manufacturing.

The application discloses a kind of water wind light integration system scheduling rule optimization method, it is related to energy system scheduling technical field.Disclosed in the application includes: design water wind light multi-energy complementary long-term scheduling chart, initialize the up and down scheduling line on scheduling chart and decision output parameter, to calculate monthly total power generation;Design medium-term scheduling rule, monthly total power generation is distributed to each day, to obtain daily power generation;Design short-term scheduling rule, daily total power generation is distributed to each hour, to obtain day-ahead generation plan;Determine the load state of each hydropower station in cascade hydropower station, and the hydraulic connection and electric connection between different hydropower stations are constrained, to obtain real-time scheduling strategy;The optimization variable of multi-objective optimization scheduling model is updated and iterated to obtain pareto solution set, and water wind light integration scheduling rule is determined according to compromise solution.The application can minimize the risk of power rejection and load loss during operation.

The invention belongs to the technical field of power utilization systems, and particularly provides an optimal scheme selection method for a power utilization system of a hydroelectric power plant, which comprises the following steps: constructing an equipment fault probability model considering decision dependence uncertainty, determining a current operation decision according to a direct current power flow model, then calculating the equipment fault probability according to the equipment fault probability model considering the decision dependence uncertainty, and then generating a random outage event; constructing a four-state reliability model of the auxiliary power equipment; according to the state of the equipment, sampling is carried out by using the four-state reliability model of the station service equipment; screening and rejecting the state that the system does not lose the load by adopting an auxiliary power reliability acceleration algorithm; determining whether the screened system state is a load loss state or not by adopting direct current power flow, and if so, determining the system load cutting capacity; and for different power supply schemes, calculating reliability indexes, and selecting an optimal scheme. According to the method, the reliability of the station service power system under different schemes is calculated, and the optimal station service power arrangement scheme is obtained.

The application discloses a kind of hydrogen energy storage's electric heating gas hydrogen comprehensive energy system random optimization scheduling method, and comprehensive energy system mainly includes four subsystems of electricity, heat, gas, hydrogen.The dynamic efficiency model of electrolytic cell, fuel cell is analyzed in the application, and the energy conversion equipment, energy storage equipment etc. between multiple energy in system are established corresponding mathematical model.The energy purchase cost, load loss compensation cost, environmental cost and wind and light penalty cost are comprehensively considered, and the total operation cost of electric heating gas hydrogen comprehensive energy system minimization is taken as objective function to carry out scheduling to the generation, heating, gas supply and electrolytic hydrogen production involved in system.The optimization scheduling method proposed in the application can effectively consume wind power, reduce operating cost, reduce environmental pollution, and has good economy and environmental protection.

The utility model provides a transformer iron core, which relates to the technical field of transformers, the transformer iron core is formed by stacking a plurality of iron core sheets, each iron core sheet is provided with a plurality of auxiliary holes in a counterpoint manner, each auxiliary hole is kidney-shaped, and the long edge direction of each auxiliary hole is arranged along the magnetic induction line direction of the iron core sheet. The transformer iron core provided by the utility model can effectively reduce the influence of the auxiliary holes on no-load loss.

The present application relates to a kind of large-capacity energy-saving amorphous alloy transformer, including shell piece, winding assembly and heat dissipation piece, the outside of shell piece is sleeved with heat dissipation piece, the internal cavity of shell piece is provided with winding assembly, the internal cavity of shell piece contains insulating liquid, winding assembly is soaked in insulating liquid. By using 1K101 high permeability amorphous alloy core, the no-load loss is greatly reduced, the leakage magnetic is reduced, and the energy-saving effect is improved. Through the cooperation of rectangular core and coil cross-section structure, the weight of the core is reduced, the material is saved, and the operating noise is reduced.

The application discloses a solar inverter system, and particularly relates to the technical field of solar power generation and power electronic control, which comprises the following modules: a photovoltaic module string dynamic reconstruction module, which dynamically adjusts the parallel connection topology of the module string through a matrix switch network, and isolates mismatched modules to output maximum power point direct current; a multi-modal MPPT and predictive control module, which fuses a neural network to output an optimal duty cycle; a high-frequency isolated DC-AC power conversion module, which adopts an LLC resonance topology and dynamically adjusts resonance inductance and capacitance, and combines temperature self-adaptive frequency and dead zone control to perform efficient conversion; an intelligent grid-connected and energy storage interface module, which supports virtual synchronous generator charging and discharging management, and bypasses the converter to reduce no-load loss when off-grid and light load; and a thermoelectricity cooperative self-adaptive cooling module, which adjusts cooling intensity based on loss feedforward prediction, and recycles waste heat to feed back to a direct current bus. The application improves solar inverter power generation efficiency, power conversion energy efficiency and system energy utilization rate.

A control system includes: a detection module configured to: analyze a harmonic content metric to determine whether a load break condition exists; if a load break condition exists, compare an amplitude metric of electrical current to an undercurrent specification to determine whether a load loss condition exists; determine whether an electrical system includes one or more broken electrical conductors, where to determine whether the electrical system includes one or more broken conductors, the detection module is configured to determine whether the load break condition and the load loss condition exist at the same time; and if the electrical system includes one or more broken electrical conductors, generating a switch command. The control system also includes a command module configured to: control a switch to stop electrical current flow into the one or more broken conductors in response to the switch command.

The present invention relates to an iron core for a transformer having low no-load loss and a manufacturing method thereof. The iron core for a transformer according to an embodiment of the present invention includes a core subpart in which multiple steel sheets are stacked and which includes a through-hole penetrating in a stacking direction, wherein a direction intersecting the stacking direction is defined as a first direction and a direction intersecting the stacking direction and the first direction is defined as a second direction, and a ratio (D / W) of a diameter (D) to a width (W) of the through-hole is 0.02 to 0.20 under the assumption that a shorter length is defined as a width (W) when comparing a length in the first direction and a length in the second direction in the core subpart.

According to the power distribution network risk assessment method under the lightning and rainstorm composite disaster based on the blind number theory, the influence of rainfall intensity on the insulation flashover voltage of the power distribution line is considered to construct the power distribution line fault probability model, and the influence of rainfall intensity on the insulation margin of the fan blade is considered to construct the fan fault probability model; constructing a transformer fault probability model; selecting a typical fault scene of the power distribution network under the lightning and rainstorm composite disaster by adopting an information entropy method; respectively representing the load loss rate, the distribution line heavy load proportion, the transformer heavy load proportion and the node voltage out-of-limit proportion as different blind numbers, calculating the risk measurement of each risk assessment index through the expectation operation of the blind numbers, and then synthesizing the weights of different risk assessment indexes to calculate the fusion value of the power distribution network risk assessment indexes. And determining the risk level of the power distribution network. According to the invention, the accuracy and comprehensiveness of power distribution network risk assessment under lightning and rainstorm composite disasters can be improved.

This invention relates to a tensioning platform and method for transformer core processing, belonging to the field of core processing technology. It includes a platform assembly for assisting in the stacking and splicing of silicon steel sheets. The platform assembly includes a base component, multiple guide components, and multiple tensioning components. The base component supports the silicon steel sheets, the guide components provide guidance during the stacking and splicing process, and the tensioning components apply a uniform and adjustable tension force to the silicon steel sheet stack. The base component includes a base on which the silicon steel sheets are placed. Multiple positioning holes are evenly distributed on the top surface of the base. Through the operation of the platform assembly, a uniform and adjustable tension force is applied to the silicon steel sheet stack, eliminating gaps between the stacked silicon steel sheets and preventing loosening and deformation during subsequent assembly and operation. Simultaneously, it ensures consistent alignment of the stacked silicon steel sheets, improving the overall magnetic permeability of the core and reducing transformer no-load losses.

The invention relates to the technical field of transformers, in particular to an energy-saving evaluation method, system, equipment and medium for a capacity-regulating transformer, and the method comprises the steps: triggering a real-time calculation mechanism through small-capacity operation, dynamically capturing an actual energy-saving window of the capacity-regulating transformer in load fluctuation scenes of a rural power grid, a commercial area and the like, and evaluating the energy-saving performance of the capacity-regulating transformer; the problem of evaluation lag when a static model is separated from a real working condition is solved; a no-load and load multi-loss collaborative superposition framework is adopted, reactive economic conversion is synchronously fused, and the balance quantification problem that the load loss is increased during small-capacity operation is ignored in a traditional method is solved; voltage and load rate dynamic correction and bilateral metering temperature difference compensation are combined, so that the influence of voltage fluctuation and winding temperature change on copper loss calculation is effectively inhibited, and the evaluation precision in an industrial field complex environment is improved; through a topological adaptive parameter matching mechanism, the method is compatible with mainstream capacitance adjusting structures such as star-delta structures and series-parallel structures, and rapid energy efficiency evaluation of batch transformer transformation projects is realized by using national standard parameters.

The invention relates to a design method and application of a hybrid magnetic circuit transformer core based on high-grade and low-grade silicon steel. The design method comprises the following steps that a core limb and a yoke of the transformer core are made of two different materials, namely a high-grade silicon steel material and a low-grade silicon steel material respectively; constructing a high-grade silicon steel material database and a low-grade silicon steel material database; materials used by the iron core columns are obtained from a high-grade silicon steel material database, materials used by the iron yokes are obtained from a low-grade silicon steel material database, and constraints of a flux density constraint module on the premise that the optimal cross section of the iron core is obtained through an intelligent optimization algorithm are met. The total cost and the total no-load loss of the whole transformer iron core composed of the iron core columns and the iron yokes are the lowest. According to the hybrid magnetic circuit transformer iron core manufactured based on the design method, on the premise that it is ensured that the electromagnetic performance reaches the standard, the material cost and / or loss are / is reduced.