53 results about "Total impedance" patented technology

The invention belongs to the technical field of energy storage system state monitoring, and provides a lithium ion energy storage system abnormal state identification method and system based on impedance spectrum analysis, and the method comprises the steps: carrying out the decoupling of voltage response data and current response data through employing an excitation-response decoupling algorithm under a dynamic working condition, and obtaining an impedance spectrum; obtaining a voltage response component and a current response component; obtaining the total impedance spectrum of the lithium ion energy storage system under the current working condition; constructing a system-level impedance cloud picture; calculating a difference value between the current impedance spectrum and the weighted moving average baseline spectrum based on the system-level impedance cloud atlas to obtain an enhanced difference cloud atlas; and performing non-uniform segmentation and feature extraction on the enhanced difference cloud picture by using a visual Transform model oriented to electrochemical prior to obtain a multi-dimensional abnormal probability vector, and obtaining an abnormal state type of the lithium ion energy storage system based on the multi-dimensional abnormal probability vector. According to the technical scheme, the accuracy, timeliness and reliability of abnormal state recognition of the energy storage system are remarkably improved.

The invention relates to the field of battery performance monitoring and early warning, in particular to a solid-state battery interface impedance monitoring and life early warning system which comprises a signal acquisition module, an impedance analysis module, a life prediction module and an early warning module. The signal acquisition module acquires interface impedance, temperature, pressure and electrochemical data of the solid-state battery in real time; the impedance analysis module analyzes, decouples and quantifies contribution values of the positive electrode interface, the negative electrode interface and the electrolyte body to the total impedance through relaxation time distribution (DRT); the life prediction module carries out parameter identification by adopting an improved adaptive genetic algorithm based on a contribution value and a multi-parameter collaborative optimization model of temperature, pressure, charge-discharge rate and the like, and predicts the residual life; and the early warning module generates an early warning signal when the residual life is lower than the threshold value or the contribution value is abnormal. Decoupling of the interface impedance and prediction of the service life are achieved, and the reliability and safety of solid-state battery management are effectively improved.

The present disclosure is directed to charging a battery pack by measuring an electrical impedance value of a battery pack by applying a sinusoidal AC excitation signal to a plurality of battery cells of the battery pack, measuring a total impedance value of the battery pack, obtaining a chemical impedance value of the battery pack based on the electrical impedance value and the total impedance value, and adjusting a charge current applied to the battery pack based on the chemical impedance value of the battery pack.

A connector structure for improving crosstalk is disclosed. The connector structure has a base, a first ground connecting sheet, and a second ground connecting sheet. The base includes a first terminal group and a second terminal group. The first ground connecting sheet is disposed within the base and connected to first ground terminals of the first terminal group. The second ground connecting sheet is disposed within the base and connected to second ground terminals of the second terminal group. A gap is disposed between the first ground connecting sheet and the second ground connecting sheet so as to prevent them from conducting with each other. Thus, the first terminal group and the first ground connecting sheet form an independent conducting route while the second terminal group and the second ground connecting sheet form another independent conducting route. Consequently, the overall impedance path of the connector structure can be reduced such that signal decay and crosstalk could be effectively improved during high frequency transmissions.

The invention belongs to the technical field of power system calculation, and discloses a distribution network short-circuit distance calculation system based on a mobile terminal, which is based on uniapp cross-terminal development framework construction, and integrates three core function modules of transformer substation bus impedance management, wire parameter management and short-circuit distance formula calculation. According to the method, basic parameters such as transformer substation bus voltage, maximum / minimum mode total impedance and the like and impedance data of wires of different models are stored in a structured mode, and a preset short-circuit distance calculation formula is combined, so that rapid calculation of the short-circuit distance and the number of corresponding towers is automatically completed after the basic parameters are input. The invention further discloses a calculation method. The problems that a traditional distribution network short-circuit distance calculation process is tedious, errors are prone to occurring, and data management is scattered are solved, the method has the advantages of being convenient and fast to operate, efficient in calculation, capable of achieving data localization storage and flexible expansion, and the method is suitable for electric power operation and maintenance personnel to rapidly carry out short-circuit distance calculation work on site.

The application provides a parallel cavity shared radio frequency power supply system and a radio frequency adjusting method for a plasma process, which comprises the following steps: collecting the ground potential of the cavity wall of each parallel process cavity in real time through a detection and adjusting module, dynamically adjusting the ground impedance of each radio frequency coil, and balancing the total ground impedance of each branch; then, completing independent dynamic impedance matching of each branch by a matching module, eliminating the power distribution imbalance problem caused by the inconsistent impedance of each radio frequency coil, keeping the plasma discharge state of the multiple cavities consistent, improving the process uniformity of each cavity, and greatly reducing the equipment cost by using only one radio frequency power supply.

The invention relates to the technical field of new energy station control, in particular to a new energy station cluster broadband oscillation monitoring control method and device. The method comprises the following steps: synchronizing a clock signal in a new energy station cluster based on a satellite synchronous clock signal; a master-slave distributed architecture is constructed for each station, and each slave processes the acquired sampling data to acquire the oscillation power and frequency of the corresponding branch and sends the processed and acquired data to the corresponding host; processing the acquired data by each host, and judging whether the broadband oscillation power component of each slave reaches a corresponding preset threshold value or not; if so, measuring the impedance of a branch corresponding to the target slave under the broadband oscillation frequency in real time, and calculating the total impedance of a corresponding target system; and based on the total impedance of the target system, performing stable control on the corresponding branch through a hierarchical generator tripping control strategy. According to the invention, wide-area synchronous sampling is realized by relying on a Beidou satellite synchronous clock, and suppression of broadband oscillation of the new energy station cluster is realized by grading with the minimum removal amount.

The invention discloses a self-synchronizing voltage source control method based on damping and droop coefficient independent adjustment, and belongs to the field of new energy power generation. The control method comprises the steps that an active-frequency droop coefficient m and a virtual damping coefficient D are designed, so that the steady-state active power is only determined by m, and independent adjustment of m and D is achieved; and generating a terminal voltage amplitude instruction through the reactive power-voltage droop coefficient n, the reactive power deviation delta Q and the output voltage zero-sequence component u0 to realize reactive power-voltage droop control. And the reactive power-voltage droop coefficient n independently adjusts the dynamic response of the reactive power and the voltage amplitude, and does not influence the steady-state characteristic of active power-frequency droop control. Compared with the prior art, only the network side voltage needs to be sampled, the hardware cost is saved, and grid-connected pre-synchronization can be achieved without obtaining the total impedance on the line.

The invention discloses a converter station short-circuit current collaborative suppression method and system, terminal equipment and a storage medium. The method comprises the following steps: acquiring node short-circuit current of a to-be-tested flexible direct-current back-to-back converter station; constructing a short-circuit current loop model of the to-be-tested flexible direct current back-to-back converter station based on the electromagnetic transient simulation model and the node short-circuit current; selecting a target node from each converter station node based on the simulation configuration data, the fault working condition data and the short-circuit current loop model; performing impedance acquisition processing on the converter station nodes to obtain initial total impedance of the target nodes; performing impedance acquisition processing on the to-be-introduced node set and the converter station nodes to obtain a to-be-updated total impedance set of the target node; and selecting a target to-be-introduced node from the to-be-introduced node set based on the initial total impedance and the to-be-updated total impedance set, enabling the target to-be-introduced node to be connected with the target node, and carrying out short-circuit current suppression on the to-be-tested flexible direct current back-to-back converter station so as to suppress the excessive short-circuit current of the flexible direct current back-to-back converter station and improve the reliability.

This application proposes a method and system for determining overvoltage and overcurrent based on phase-to-phase grounding faults. The method includes: determining the maximum value of the negative-sequence fault current and the maximum value of the voltage of the non-faulty phase corresponding to the total impedance, positive-sequence voltage, and AC positive-sequence current of the system when a phase-to-phase grounding fault occurs; using the maximum value of the negative-sequence fault current as the negative-sequence overcurrent when a phase-to-phase grounding fault occurs, and using the maximum value of the voltage of the non-faulty phase as the overvoltage when a phase-to-phase grounding fault occurs in the wind power transmission system via flexible direct current transmission. The technical solution proposed in this application can accurately determine the negative-sequence overcurrent and overvoltage values ​​when a phase-to-phase grounding fault occurs in the wind power transmission system via flexible direct current transmission based on the total impedance, positive-sequence voltage, and AC positive-sequence current of the system, and control the stable operation of the wind power transmission system via flexible direct current transmission based on the determined negative-sequence overcurrent and overvoltage values.

The present disclosure is directed to charging a battery pack by measuring an electrical impedance value of a battery pack by applying a sinusoidal AC excitation signal to a plurality of battery cells of the battery pack, measuring a total impedance value of the battery pack, obtaining a chemical impedance value of the battery pack based on the electrical impedance value and the total impedance value, and adjusting a charge current applied to the battery pack based on the chemical impedance value of the battery pack.

The utility model belongs to the field of high-voltage switch temperature rise tests, and discloses a current regulating system for a high-voltage switch temperature rise test, a power supply device is sequentially connected with a voltage regulator, a reactance load unit and a current booster, the other end of the current booster is connected with a high-voltage switch to be tested, and two ends of the reactance load unit are connected with a short-circuit switch in parallel; due to the introduction of the reactance load unit, the total load of the system is increased when the load is small, the regulation of the voltage regulator is more stable, the output current of the large current generator is closer to the designed operation point, and the stability of the test current is obviously improved; when large current output is needed, the short circuit switch can bypass the reactance load unit to reduce the total impedance of the system, and the system can still keep efficient output. According to the system, through dynamic access or short circuit of the reactance load, the effective regulation range of the voltage regulator is expanded, the current regulation speed is reduced by utilizing the characteristics of the inductance load, stable current output is realized, the test precision is improved, good adaptability and controllability are achieved, and the temperature rise test requirements of switch equipment with different capacities are met.

The application provides a non-contact ECG signal collection foot ring sensor, which comprises a foot ring body and an ECG signal sensor arranged on the foot ring body, wherein the ECG signal sensor comprises an electrode composite layer, a first insulating layer, an electromagnetic shielding layer and a second insulating layer arranged in sequence, the electrode composite layer comprises a first electrode, a second electrode and a polarity layer arranged between the first electrode and the second electrode, the polarity layer comprises a polarity material of barium titanate and / or calcium titanate, the first electrode is used for being connected to an ECG collection circuit, the second electrode is arranged in suspension, and the electromagnetic shielding layer is grounded. The foot ring sensor of the application comprises the electrode composite layer, the electrode composite layer contains the polarity material of barium titanate and / or calcium titanate with high dielectric constant, and thus has high dielectric performance, can effectively improve the coupling capacitance between the skin and the electrode, and further reduce the capacitive reactance and total impedance, reduce the attenuation degree of the ECG signal in the coupling process, and improve the electric signal detection effect.

The invention discloses a wave trapper design method and system for partial discharge detection, and a medium. The method comprises the following steps: constructing a total impedance model for a wave trapper; determining the center frequency f0 of the blocking frequency band of the wave trapper according to the two boundary frequencies required to be blocked by the wave trapper, and constructing a function model of the blocking frequency band width of the wave trapper by combining the offset of the boundary frequencies; solving a function model of the blocking frequency band width of the wave trapper according to the total impedance model to obtain the blocking frequency band width of the wave trapper considering the offset; and calculating element parameters in the wave trapper according to the blocking frequency band width of the wave trapper considering the misalignment amount. According to the method, the detuning amount of the blocking boundary frequency required by the wave trapper is considered, the wave trapping effect of the designed wave trapper near the boundary frequency can meet the design expectation, and the method can be applied to a partial discharge detection scene with strict requirements on the wave trapping performance.

This invention discloses a method for equalizing the branch impedance of a parallel capacitor bank, comprising: determining parameters such as the connection position of each capacitor branch on the positive and negative busbars, and the input and output positions of the positive and negative busbars; and balancing the impedance of the first capacitor branch with the second capacitor branch. i The total equivalent impedance of each capacitor branch is decomposed into busbar path impedance, capacitor body impedance, and connector distributed impedance. Based on the connection location and busbar inlet / outlet positions, the corresponding busbar path impedance is calculated or extracted. Based on the busbar path impedance, capacitor body impedance, and adjustable range of connectors for multiple capacitor branches, the total impedance of the target branch is determined. The impedance of the first capacitor branch is then calculated inversely based on the total impedance of the target branch. i The invention addresses the impedance compensation required for each capacitor branch and determines the corresponding connector configuration scheme based on the target impedance compensation. This invention brings the total equivalent impedance of multiple capacitor branches closer to uniformity, achieving branch impedance balancing in parallel capacitor banks.

The invention relates to the technical field of grounding device design, and discloses a graphene coating thickness determination method, system, equipment, medium and product, and the method comprises the steps: determining the skin depth under high-frequency current according to the conductance parameter of a graphene coating in combination with the lightning current frequency, and determining the thickness of the graphene coating under the constraint of the skin depth. And determining the optimal thickness of the graphene coating according to the conductivity parameter of the coated substrate and the conductivity parameter of the graphene coating in combination with the target impedance, so that the graphene coating can effectively utilize the skin effect to concentrate the current in a high-conductivity region under the action of high-frequency lightning current, and the condition that the coating covers the current concentration region to meet the conductive requirement is ensured; the impedance matching can be realized by adjusting the thickness of the coating, the inductance effect influence is considered, the total impedance is ensured not to exceed the limit value, and the overall conductivity is ensured to reach the standard.

The invention relates to a data transmission method and device, electronic equipment, a storage medium and a program product, and the method comprises the steps: controlling the first total impedance of first equipment on a data transmission path between the first equipment and second equipment to be gradually reduced under the condition that the first equipment in a high-speed mode fails to enumerate for the first time, the first equipment and the second equipment are universal serial interface (USB) equipment which are matched with each other; and enumeration is carried out based on the first total impedance reduced each time until enumeration succeeds. According to the invention, the compatibility problem of the first device and the second device during USB communication can be solved.

The embodiment of the invention discloses a piezoelectric ultrasonic power meter and a measurement method thereof, and relates to the technical field of ultrasonic power measurement, and the method comprises the steps: building a probe total impedance model comprising a welding spot mass inertia load, parasitic capacitance, cable distribution inductance and distribution capacitance, and precisely correcting the mapping relation between voltage and sound pressure; self-adaptive correction parameters based on the effective area proportion of the probe to be measured and the receiving probe are introduced, and accurate measurement of probes of different sizes is achieved; the device comprises a precise three-dimensional mobile platform which is driven by a ball screw and is provided with a manual locking mechanism, and a special high-pass filter for suppressing low-frequency noise. The embodiment of the invention solves the problems of inaccurate measurement model, poor probe size adaptability, tedious operation, easy interference and the like in the prior art, and has the advantages of high measurement precision (error lt: 5%), wide application range, convenient and stable operation, strong anti-interference capability and the like.

The invention provides an impedance multiplication structure and a manufacturing method thereof, and the impedance multiplication structure comprises a substrate, a first external electrode, a second external electrode, a plurality of surface resistors, and a plurality of impedance adjusting electrodes. The impedance multiplication structure adjusts the total impedance value of the impedance multiplication structure by cutting off at least one of the plurality of impedance adjustment electrodes.

The invention discloses a detection type pilot protection method, system, equipment and medium suitable for a power transmission line with a series compensation device, and relates to the technical field of relay protection, and the method comprises the steps: injecting higher harmonic electrical quantity into a power system through an adjacent controllable converter when the operation state of the power system is abnormal; respectively calculating a differential current and a braking current under higher harmonic electrical quantity injection, deducing a differential braking ratio based on the differential current and the braking current, and preferably selecting a plurality of harmonic electrical quantities according to the differential braking ratio; and comparing the longitudinal differential protection sensitivity under the plurality of harmonic electrical quantity injections, constructing a longitudinal differential protection criterion based on a comparison result of the longitudinal differential protection sensitivity, and executing a power transmission line protection action according to the longitudinal differential protection criterion. According to the method, odd harmonics are injected into the line when the fault occurs, and third harmonics are preferentially selected, so that the reactance of the line is multiplied, the capacitive reactance of a series compensation capacitor is reduced, and the proportion of the capacitance impedance in the total impedance is weakened.

Disclosed is a memory device, which comprises a memory cell array that includes a plurality of memory cells; an input / output circuit configured to transmit data received from an outside (e.g., an external source) through a data pad to the memory cell array or transmit data read from the memory cell array to the external source; and an impedance calibration circuit configured to generate an impedance calibration code that is applied to the input / output circuit. The impedance calibration circuit is further configured to divide a total impedance calibration section into a plurality of sub-impedance calibration sections, and perform at least one sub-impedance calibration in each of the plurality of sub-impedance calibration sections, the at least one sub-impedance calibration corresponding to at least one of a plurality of impedance modes.

This invention relates to the field of fuel cell technology and discloses a fuel cell impedance attribution method based on a physically interpretable impedance model. The method includes: performing impedance decomposition on the physically interpretable impedance model to obtain multiple sub-impedances of the fuel cell, including ohmic resistance, anode impedance, cathode activation impedance, cathode mass transfer diffusion impedance, and cathode mass transfer convection impedance; obtaining the frequency corresponding to the minimum value of the imaginary part of each sub-impedance, the inverse of the minimum value of the imaginary part, and the difference between the low-frequency real part value and the high-frequency real part value, as characteristic frequencies, imaginary peak values, and equivalent resistances; plotting the Nyquist plot, Bode plot, resistance ratio of the sub-impedance's equivalent resistance to the total equivalent resistance, and frequency-peak plot reflecting the relationship between the characteristic frequency and the imaginary peak value for each sub-impedance, to determine the contribution of each sub-impedance to the physically interpretable impedance model, thus realizing impedance attribution analysis under the physically interpretable impedance model.

The present application relates to the technical field of semiconductor processing, and particularly relates to a high-density foot support for small diodes, comprising a pin frame, a plurality of groups of base pins are arranged in the pin frame, the base pins are sequentially provided with an inside adjusting arc and a first bending arc in the direction from the chip mounting assembly to the pin frame. The adjusting arc and the first bending arc improve the damage of the electrical performance of the base pins caused by the bending of the base pins when the base pins are bent into seagull pins after protruding from the plastic package, thereby reducing the return loss of the diode chip in the high-frequency circuit, and the total impedance change of the base pins when penetrating is slow. The first bending arc completes the bending of the seagull pin by making the bending degree of the base pin slow first and then fast, to meet the small size requirement, and by ensuring the final curvature radius of the first bending arc, the problem of high-frequency return loss being difficult to optimize due to the conflict between the impedance mutation caused by the bending of the pin and the miniaturization requirement in the prior art is overcome.

The invention provides an impedance characteristic evaluation method, device, equipment, medium and program. Relates to the technical field of power system management. The method comprises the following steps: injecting a bipolar square wave excitation signal into a grounding grid through a coupling device deployed in the grounding grid; acquiring a high-frequency response signal generated by the grounding grid under the excitation of the bipolar square wave excitation signal through an acquisition device deployed in the grounding grid; decomposing the high-frequency response signal to obtain a resistance spectrum and a reactance spectrum of the grounding grid; by comparing the difference between the total impedance spectrum of the grounding grid and the resistance spectrum and the difference between the total impedance spectrum of the grounding grid and the reactance spectrum, impedance characteristics capable of reflecting the impedance change of the grounding grid along with the frequency are obtained, and the total impedance spectrum of the grounding grid is used for describing the resistance and the impedance at different frequencies when the grounding grid normally works. According to the invention, an accurate and reliable impedance characteristic evaluation effect is achieved.

The invention discloses a closed-loop power adjusting method, system and device based on an angular difference closed-loop circuit and a medium. The method comprises the following steps: calculating closed-loop circuit impedance based on a first resistor and a first reactance of a first circuit and a second resistor and a second reactance of a second circuit; loop total impedance is calculated based on the loop closing line impedance, the first equivalent impedance of the first transformer substation and the second equivalent impedance of the second transformer substation, loop current is calculated based on the loop total impedance and loop voltage, and the loop voltage is used for indicating the voltage difference of lines on the two sides of the position where the first switch is located; and generating a power adjusting condition based on the loop current, and adjusting the first switch back to be powered by the first line when the switch constant value corresponding to the first switch meets the power adjusting condition. According to the application, the switch constant value of the interconnection switch is automatically calculated through the power regulation system, and automatic power regulation is carried out based on whether the switch constant value meets the power regulation condition, so that the calculation accuracy of the switch constant value on the loop line and the power regulation efficiency in a closed-loop power regulation operation mode can be effectively improved.

The invention relates to the technical field of undersea wireless power transmission, and discloses an undersea wireless power transmission electromagnetic interference suppression optimization control method and system, and computer equipment. The method comprises the following steps: before starting transmission, acquiring and locking a real-time mutual inductance value between a primary side and a secondary side through a detection signal; in the transmission process, primary side electric energy parameters, coil temperature and secondary side feedback load parameters are collected in real time; and removing the inherent internal resistance and the reflection impedance from the primary side total impedance by using a decoupling algorithm to obtain the seawater equivalent resistance representing the environmental loss. If the resistance is larger than a preset threshold value, a high-loss environment is judged, the system generates an asymmetric spread spectrum driving signal, a carrier frequency hopping upper limit is locked as a resonant frequency, and a lower limit is adjusted towards a low-frequency direction so as to cut off a heating high-frequency component; otherwise, generating a symmetric spread spectrum signal. According to the invention, the spectrum distribution can be adaptively adjusted according to the characteristics of the underwater medium, and the seawater eddy current loss is effectively reduced while EMI is suppressed.

The invention relates to the technical field of AED detection, in particular to an AED disposable electrode plate detection circuit which comprises a main control unit and a load isolation piece. The main control unit is integrated with an MCU and an impedance measurement circuit and is used for generating an alternating current excitation signal with a preset frequency and measuring a response signal; the load isolation sheets have fixed impedance values, two ends of the load isolation sheets are connected with electrode sheets, and the load isolation sheets are used for forming a series detection loop; the impedance measuring circuit is electrically connected with the load isolation piece, an alternating current excitation signal is applied to the series detection loop through the impedance measuring circuit, the total impedance value of the series detection loop is measured, the impedance value of the electrode plate is calculated by subtracting the fixed impedance value of the load isolation piece from the total impedance value, and when the impedance value of the electrode plate exceeds a preset threshold value, the impedance value of the electrode plate is detected. And outputting a failure signal. According to the invention, the problems of resource waste or emergency risk caused by a fixed replacement period and false triggering of AED action by impedance measurement due to incapability of identifying failure of the sealing electrode plate by manual visual inspection are solved.

The invention discloses an antenna array multi-branch impedance compression method and device, and the method comprises the steps: enabling three microstrip lines with the same characteristic impedance to be correspondingly connected with three loads, and constructing a one-to-three multi-branch network; setting the electrical length of the three microstrip lines based on the matching requirement of impedance compression; calculating through a microstrip line transmission formula to obtain input impedance corresponding to the three loads; performing parallel processing on the three input impedances to obtain a total impedance; the output end of the parallel circuit is connected with a section of set impedance converter; the total impedance is converted into standard impedance by setting an impedance converter, and basic impedance compression matching is completed; based on feed requirements of different antenna arrays, a one-to-three multi-branch network and a double-branch impedance compression network or a power divider are combined and expanded to form a one-to-multiple impedance compression network, and an impedance stabilization target in a multi-port feed scene is achieved. The problem that the impedance matching requirement of a one-to-three or more multi-branch feed network cannot be met in the prior art is solved.

The invention discloses a method for suppressing harmonic waves of a metal sheath of a direct-current cable during laying of alternating-current and direct-current cables. According to the method, grounding equivalent loop parameters of a direct-current cable metal sheath are obtained, sheath loop total impedance and corresponding harmonic circulating current under each odd harmonic are calculated, filtering branch inductance corresponding to each odd harmonic is selected according to the harmonic circulating current and engineering constraints, and filtering branch capacitance is calculated according to the selected inductance. The impedance amplitude and the equivalent resistance component of each filtering branch circuit under the target frequency are calculated, the equivalent resistance is determined by combining an allowable transient voltage amplification factor, and the filtering branch circuits are connected in series in a sheath grounding loop, so that accurate suppression of odd harmonics is realized. The method can effectively reduce the higher harmonic component in the induction current of the DC cable sheath, reduces the overheating and loss risks of equipment, improves the safety and operation reliability of an AC / DC hybrid tunnel laying system, and has the advantages of simple and convenient engineering implementation and controllable parameters.

The present application provides a kind of based on M-HODLR solving electromagnetic scattering method of metal medium composite structure, to solve the problem of large memory consumption and low accuracy of electromagnetic scattering result when solving electromagnetic scattering of metal medium composite structure.The implementation steps of the present application are: the surface of metal medium composite structure is completely meshed;Define the base function on each mesh element after meshing and sort the base function;Fill the total impedance matrix;Total impedance matrix is blocked using M-HODLR method;Each sub-matrix block after blocking is compressed using enhanced ACA method;Solve the matrix equation of the generated metal medium composite structure and calculate the electromagnetic scattering result.The present application has the advantages of significantly reducing the calculation memory, reducing the solving time and the high accuracy of the electromagnetic scattering result of the metal medium composite structure calculated.