63 results about "Impedance distribution" patented technology

The invention relates to the technical field of circuit boards, and discloses a circuit board interlayer connection detection method, device and equipment, and the method comprises the steps: carrying out the electrical characteristic parameter measurement of a multilayer flexible circuit board, and obtaining the characteristic parameter data of the circuit board; designing and arranging a multi-test-point detection structure on the multi-layer flexible circuit board, and performing signal excitation to obtain test point position information; applying a differential excitation signal, and collecting a differential response waveform between the test points to obtain a time domain reflection signal feature; impedance spectrum conversion and parameter extraction are carried out on the time domain reflection signal features, and an interlayer connection impedance distribution diagram is obtained; and establishing an interlayer connection defect characteristic model aiming at nickel-based alloy wire fracture, interface cracking and liquid metal fiber felt delamination in various bending states by utilizing the interlayer connection impedance distribution diagram, so that accurate classification of defect types and severity is realized, and interlayer connection faults and surface welding quality problems can be distinguished; and the misjudgment rate is greatly reduced.

The invention discloses a new energy-based centralized area electric power analysis management method and system, and particularly relates to the technical field of photovoltaic power station fault analysis. Direct current side current, voltage and environment air pressure data are collected, an arc noise energy judgment threshold value is dynamically adjusted based on air pressure, and a current change rate difference correction coefficient is generated; a composite index of arc noise frequency band energy and voltage signal abrupt change is constructed, and an arc feature vector is generated in combination with waveform oscillation periodicity; comparing the feature vector with a preset template through a dynamic time warping matching algorithm, calculating a matching weight and a trend slope, and judging an arc reignition event in combination with a dynamic judgment threshold and a continuous increasing condition; and generating a priority breaking instruction sequence based on the event duration, controlling the breaking time sequence of the target string according to the grounding grid impedance distribution, and sending a blocking signal to the inverter in the coverage area.

The invention relates to the technical field of circuit board conductivity detection, and discloses a circuit board conductivity detection method and system based on deep learning, and the method comprises the steps: obtaining high-resolution image data and circuit design parameters of a to-be-detected circuit board, and generating a circuit board feature data set; calculating theoretical impedance distribution of each area of the circuit board by using a physical constraint neural network based on the circuit board feature data set, and outputting an impedance prediction parameter set; inputting the impedance prediction parameter set and the circuit symbol rule into a neural symbol inference device to generate a conductance fault diagnosis result; and obtaining diagnosis results of a plurality of detection sites, executing cross-site diagnosis fusion, and outputting a unified circuit board conductivity detection report. The method overcomes the limitation that a traditional visual detection method cannot identify electrical characteristic defects, and solves the detection problem of hidden faults such as discontinuous impedance of the high-frequency circuit board.

The invention relates to the technical field of radio frequency measurement, and discloses a method for measuring the high-frequency characteristic of a radio frequency coaxial probe. The method comprises the following steps: acquiring high-frequency response data of a radio frequency coaxial probe, segmenting a full frequency band based on a predefined frequency band division strategy, and identifying a key frequency band region; according to the response amplitude and phase distribution of the key frequency band region, screening a reference frequency band and extracting an impedance reference value, optimizing impedance matching parameters of a non-reference frequency band based on the reference value, and generating a frequency band impedance optimization parameter set; recombining a full-band impedance distribution sequence according to the parameter set to generate an initial impedance matching scheme; and finally, monitoring the high-frequency transmission deviation under the initial scheme in real time, counting the impedance fluctuation quantity and the phase offset, and generating an impedance correction instruction. The method effectively improves the stability and reliability of the measurement of the high-frequency characteristic of the radio frequency coaxial probe by accurately identifying the key frequency band in a segmented manner, guiding the impedance parameter optimization by the reference value and combining a dynamic correction mechanism.

The invention relates to a battery contact resistance in-plane distribution estimation method and device, computer equipment and a storage medium. The method comprises the following steps: operating a to-be-detected battery under a stable operation condition, and collecting current density distribution of each region in the to-be-detected battery; each region is obtained by dividing according to a cathode flow field structure and an anode flow field structure of the to-be-detected battery; when the state of the to-be-detected battery meets a preset state condition, ohmic impedance distribution identification is carried out according to the current density of each region, ohmic impedance of each region is determined, and the preset state condition is matched with the stable operation condition; and determining the contact resistance of each region according to the ohmic impedance of each region. And the membrane is completely hydrated through high-humidity and high-current stable operation of the battery, so that the membrane impedances in different areas in the surface are approximately equal. And the accuracy of identifying the contact resistance of the to-be-detected battery is improved.

The invention discloses a BMS board card defect intelligent detection method and system, and aims to construct a circuit state spectrum library by collecting multi-domain abnormal signals to carry out frequency domain fusion, identify an abnormal impedance mode and generate defect excitation points. Performing gradient analysis on the thermal infrared distribution signal to generate a heat flow topological field, extracting an abnormal heat source position and establishing a thermoelectric coupling coordinate; injecting a sweep frequency signal at a defect excitation point to generate a defect response characteristic, and generating an enhanced detection domain through resonance amplification; performing spectral decomposition on the enhanced detection domain to identify defect resonance frequency points, and constructing a phase detection network by using multi-frequency superposition excitation and phase weaving; performing harmonic crosstalk mining based on the phase detection network and the defect impedance distribution domain to generate a defect positioning matrix; performing impedance gradient analysis on the defect positioning matrix to reconstruct a defect electric field topology, and realizing accurate defect coordinate positioning; and finally, defect type identification and severity level evaluation are completed through hierarchical labeling and echelon damage recursive chain analysis.

The invention relates to the technical field of solid fuel cells, and discloses a porous gradient anode supported solid fuel cell impedance optimization method which is applied to a system comprising a plurality of porous gradient anode impedance sensors and an optimization controller. The method comprises the steps that a sensor collects voltage and current data to generate an impedance state data set; the optimization controller constructs a regional impedance state matrix, extracts features through processing, performs impedance distribution prediction in combination with a potential gradient and the like, outputs spatial and temporal distribution features through an impedance optimization model, and updates a data set; and dynamically optimizing regional electrode parameters according to the distribution characteristics, including voltage adjustment, current aggregation, resistance distribution and other operations. According to the method, through multi-sensor distributed acquisition, multi-dimensional feature analysis and dynamic modeling, accurate prediction and parameter dynamic regulation and control of electrode impedance spatial and temporal distribution are realized, the performance and stability of the solid fuel cell are improved, and the method is suitable for the field of solid fuel cell management.

The invention relates to the technical field of ice prevention and disaster reduction of high-voltage power transmission lines, and discloses a cascaded direct-current ice melting system of a high-voltage power transmission line, a control method and a device. The method comprises the following steps: inputting a test signal to the cascaded direct-current deicing system, and detecting the voltage and current of each node; calculating line impedance distribution based on the voltage and current of each node, and constructing a line equivalent model; calculating the minimum ice melting current based on the ice thickness monitoring data and the weather data, and calculating the output current of each ice melting device based on the minimum ice melting current and the line equivalent model; monitoring circulating current between systems, and calculating virtual compensation voltage based on the circulating current; and adjusting the output voltage of each ice melting device based on the virtual compensation voltage. The ice melting success rate, the safety of the system and the service life of the system can be improved.

The invention relates to the technical field of semiconductor surface cleaning, and discloses a remote plasma-assisted semiconductor etching surface cleaning method. The method comprises the following steps: configuring a remote plasma generating device and setting an initial parameter combination; then collecting surface state data of the semiconductor wafer, and constructing a surface state change matrix after multi-dimensional preprocessing; inputting the matrix into a multi-modal feature integration model for feature integration, and constructing a plasma action anomaly feature matrix according to the feature integration; iteratively optimizing the initial parameter combination by adopting a dynamic optimization algorithm, and setting device operation parameters according to the optimized parameters; a three-dimensional surface cleaning state model is constructed based on wafer surface impedance distribution data, and a mapping relation between model parameters and surface pollutant components is established; and finally dynamically adjusting device operation parameters according to the mapping relation. According to the method, through multi-dimensional data processing, feature integration, parameter optimization and dynamic adjustment, the accuracy and adaptability of semiconductor etching surface cleaning are improved.

The invention belongs to the technical field of power systems, and particularly relates to a power distribution line fault accurate positioning method and system, and the method comprises the steps: constructing a dynamic updating topological impedance library containing a topological structure, line parameters and terminal information; after a fault signal is triggered, the multiple terminals cooperatively collect a traveling wave signal and a timestamp and complete integrity verification; preprocessing the signal, and extracting a traveling wave leading edge feature point timestamp and a voltage-current amplitude ratio; determining a fault associated branch through time difference, impedance deviation and signal polarity screening in combination with topological impedance library information; tracing and simplifying a traveling wave path, and calculating an actual propagation speed initial fault distance; and correcting the distance according to the impedance distribution characteristics and converting into geographic coordinates for output. According to the method, the problems of large deviation and high misjudgment rate of a traditional positioning method are solved, the accuracy and response speed of fault positioning are improved, the fault handling time is shortened, the operation and maintenance cost is reduced, and safe and reliable operation of a distribution line is guaranteed.

The application belongs to the technical field of power systems, and particularly relates to a distribution line fault accurate positioning method and system, which comprises a dynamic updating topology impedance library containing topology structure, line parameters and terminal information; after a fault signal is triggered, multiple terminals cooperatively collect a traveling wave signal and a time stamp and complete integrity verification; after signal preprocessing, a traveling wave front feature point time stamp and a voltage-current amplitude ratio are extracted; in combination with topology impedance library information, a fault correlation branch is determined through time difference, impedance deviation and signal polarity screening; a traveling wave path is traced back and simplified, an actual propagation speed is calculated to preliminarily determine a fault distance; and the distance is corrected according to impedance distribution characteristics and converted into geographic coordinates for output. The application solves the problems of large deviation and high misjudgment rate of traditional positioning methods, improves the accuracy and response speed of fault positioning, shortens fault disposal time, reduces operation and maintenance cost, and guarantees safe and reliable operation of the distribution line.

The invention discloses a beam forming antenna based on a holographic tensor impedance modulation metasurface and a design method thereof, and belongs to the technical field of microwave antennas. The antenna comprises a monopole feed source and a metasurface formed by a periodic array, wherein each tensor impedance unit adopts a three-layer structure comprising an upper slotted metal patch, a middle dielectric substrate and a lower metal grounding layer. A unit library of patch sizes and electromagnetic characteristics is constructed, tensor impedance distribution of each unit is calculated by adopting an iterative algorithm based on a holographic principle, and finally accurate matching with the unit library is realized. According to the invention, the surface wave can be efficiently converted into a specified target wave beam, high-gain and low-sidelobe dual-beam or flat-topped wave beam forming can be realized in a broadband, and meanwhile, the antenna has the advantages of low profile, easiness in integration and low cost, and can be widely applied to a modern wireless communication system.

The present invention discloses a method, device, equipment and medium for suppressing circulating current, including: determining an equivalent circuit model according to the circuit structure of a common DC dual-motor controller to be optimized; determining a target loop from the equivalent circuit model according to the impedance distribution in the equivalent circuit model; determining a target device to be optimized and the target parameter value of the target device in the target loop according to the resonance frequency change rule and / or the ripple current frequency change rule of the target loop; optimizing the target device according to the target parameter value to suppress the circulating current in the target loop. According to the resonance frequency change rule and / or the ripple current frequency change rule in the target loop, the present invention can determine the target device to be optimized, and then optimize the target device to suppress the circulating current in the target loop. The present invention can be used for substantially all common DC dual-motor controllers, can provide a solution direction for suppressing circulating current, reduces the process of repeated rectification in the test stage, and reduces the test cost.

The invention provides a reinforced concrete pipeline traction structure and method, and relates to the technical field of pipeline construction. According to the reinforced concrete pipeline traction structure and method, the method comprises the following steps of S1, based on multi-frequency geological radar scanning, adopting an improved back propagation neural network algorithm, extracting 12-dimensional characteristic parameters such as a stratum dielectric constant and water content through wavelet packet decomposition, constructing a three-dimensional geological model, and generating a stratum impedance characteristic matrix; through combination of multi-frequency geological radar scanning and an improved back-propagation neural network algorithm, high-precision three-dimensional modeling of stratum parameters is realized, impedance distribution characteristics under complex geological conditions are effectively identified, historical traction data are fused by adopting a convolutional long-short-term memory network, a dynamic traction prediction model is established, and a dynamic traction prediction model is established. And the real-time performance and adaptability of traction force control are obviously improved.

This invention discloses a design method, system, device, and medium for an ultra-low profile, high-aperture efficiency transmission array antenna. The method includes: simulating tensor impedance metasurface elements and obtaining the maximum equivalent scalar surface impedance corresponding to different structural parameters; establishing an impedance-structure model; designing the impedance distribution of the tensor impedance metasurface elements; obtaining the structural parameters of the tensor impedance metasurface elements through the impedance-structure model and designing a tensor impedance metasurface; simulating transmission metasurface planar elements and obtaining the transmission coefficient phase corresponding to different structural parameters of the transmission metasurface elements; establishing a phase-structure model; obtaining the structural parameters of the transmission metasurface elements under the target aperture field phase through the phase-structure model and designing a transmission metasurface plane; and designing an ultra-low profile, high-aperture efficiency transmission array antenna based on the designed tensor impedance metasurface and transmission metasurface plane. This invention significantly improves design freedom and facilitates meeting more beamforming and radiation direction design requirements.

The application discloses a radio frequency fascia layer thermal effect lifting system and method based on an anti-gravity vector, and belongs to the technical field of skin care and beauty. An initial impedance distribution diagram of a target skin area is acquired, a detection radio frequency wave is emitted, and a relative dielectric constant offset of a fascia layer relative to an epidermis layer and a dermis layer is extracted from a reflected wave signal. The offset and a depth arrangement order are input into an anti-gravity vector calculation unit, an anti-gravity vector sequence is calculated and generated, radio frequency waveform parameters matched with the vector sequence are called from a waveform database, and are loaded to a phase control array. The surface temperature and impedance changes of the target skin area are monitored in real time, impedance fluctuation feedback values are generated, and the beam pointing adjustment parameters in the subsequent anti-gravity vector are dynamically corrected accordingly until the thermal effect area construction of all target points is completed. The application accurately controls the radio frequency beam pointing through the anti-gravity vector, realizes accurate and orderly heating of the subcutaneous fascia layer, and has self-adaptive correction capability.

The invention relates to the technical field of network planning, in particular to a communication equipment wire harness path optimization system based on 5G base station distribution data, which comprises the following steps: receiving base station distribution data and signal frequency characteristics, establishing a dielectric constant gradient analysis model, calculating the optimal dielectric constant distribution of a wire harness insulating layer, and generating an impedance distribution matrix; calculating electromagnetic field intensity distribution of each layer based on the impedance distribution matrix to obtain a structure parameter set, establishing a comprehensive transmission loss prediction model, calculating a weight coefficient of each transmission path in combination with base station distribution data, and obtaining a dynamic path priority and a power distribution scheme; updating the network topology analysis unit based on the base station distribution data, simulating a preset base station signal change, obtaining the dynamic path priority and the robustness of a power distribution scheme in different network states, and outputting analog transmission performance data; therefore, the adaptive capacity of the system to burst network changes is improved, and signal degradation caused by path interference and load concentration is also remarkably reduced.

The utility model relates to the technical field of display, in particular to a display panel and a display device, and aims to solve the technical problems of poor vertical lines and vertical Mura caused by non-uniform distribution of bonding impedance. In order to achieve the purpose, the display panel comprises a fan-out area, the fan-out area comprises a middle area, a first edge area and a second edge area, the first edge area and the second edge area are located on the two sides of the middle area respectively, and the line width of fan-out lines in the middle area is larger than the line width of fan-out lines in the first edge area and the line width of fan-out lines in the second edge area. By widening the fan-out lines in the middle area, the impedance of the middle area is reduced, the uneven impedance caused by bonding is balanced, and the technical problems of poor vertical lines and vertical Mura are solved.

The utility model discloses a transmit-receive circuit with multifunctional mesh and a transceiver, and relates to the related field of transceiver devices, the transmit-receive circuit comprises a signal receiving module, a signal processing module, a signal sending module and a multifunctional mesh module, the four modules comprise an interface circuit, a filter circuit, a coupling circuit and an impedance distribution circuit, the first antenna and the second antenna are respectively used for realizing signal receiving, filtering, coupling and impedance matching; the transceiver comprises a POE (Power Over Ethernet) port, a power supply module, a photodiode, a boosting module, a memory, a multifunctional mesh and a shell; according to the utility model, the problem of power supply is solved through the POE network port, the problem of insufficient interfaces is solved through the multifunctional mesh module, and the problem of heat dissipation is solved through the porous heat dissipation shell.

The invention discloses a multi-feed-source common-caliber OAM mode and polarization multiplexing holographic metasurface antenna design method and system, and mainly solves the problems of few OAM modes and insufficient multiplexing dimensions in the prior art. According to the implementation scheme, q feed sources are arranged at different positions, and modes and polarization modes of the feed sources are determined; excitation waves generated by each feed source and corresponding emergent waves are calculated, interference is carried out on the excitation waves and the corresponding emergent waves to obtain tensor surface impedance distribution corresponding to each feed source, and the tensor surface impedance distribution is superposed and converted into equivalent scalar surface impedance distribution; designing units satisfying equivalent scalar surface impedance distribution, and arranging the units on the common aperture surface of the feed source to form a metasurface; independently exciting a plurality of feed sources with the same polarization on the metasurface to generate corresponding modals to realize modal multiplexing; and different polarization feed sources are respectively excited to generate multi-mode wave beams, so that mode and polarization dual multiplexing is realized. According to the invention, multiple OAM modes and multiple polarizations can be multiplexed at the same aperture, dual multiplexing of the modes and the polarizations is realized, and the antenna can be used for multiple-input multiple-output (MIMO) wireless communication.

The application belongs to the technical field of electronic circuits, and particularly relates to a high-order topological insulator circuit design method based on graphdiyne structure. The method comprises the following steps: (1) establishing an LC circuit model of a two-dimensional rhombus-shaped graphdiyne structure; (2) obtaining the admittance matrix of the circuit according to the Kirchhoff equation, solving the matrix eigenvalues and eigenvectors by using MATLAB, and obtaining the admittance band structure; (3) changing the size of the capacitance proportion parameter, so that the topological phase transition of the circuit system can be realized; (4) in the topological non-trivial phase parameter region, the impedance distribution under different frequencies is calculated, and it can be observed that the system has zero energy angle state, i.e. second-order topological state; (5) the impedance distribution under a specific frequency is measured, and it is observed in the experiment that the topological angle state is localized in the obtuse angle or acute angle region of the rhombus-shaped circuit board, and the system has high-order topological properties.

Device for determining the regional distribution of a measure of lung perfusion in a sectional plane of the thorax with • an electrical impedance tomography unit with a large number of electrodes (E1, ... E N ), which can be attached to the thorax distributed around the circumference of the cutting plane, and with a control and evaluation unit (2) connected to the plurality of electrodes, which is designed to successively supply alternating current or alternating voltage to each pair of electrodes and to record voltage or current signals from the remaining electrodes as measurement signals and to reconstruct the impedance distribution in the cutting plane from the measurement signals, • a supply device (4) for the intravenous supply of a conductivity contrast medium, wherein the control and evaluation unit (2) is further configured to display the changes in the impedance distribution as a result of the supply of conductivity contrast medium as a measure of the lung perfusion in the sectional plane as a function of time, characterized in that • the supply device (4) has a controllable dosing device and the control and evaluation unit and the dosing device are connected to one another via a data connection (3) and are arranged such that at least the start and end time and amount of the delivery of a bolus of the conductivity contrast agent are available to the control and evaluation unit (2), • the control and evaluation unit (2) is configured to control the dosing device for administering a bolus of the conductivity contrast agent at a predetermined start time, with a predetermined amount and with a predetermined time course via the data connection (3) and to repeat the administration of the bolus of the conductivity contrast agent at predetermined time intervals • or the dosing device is designed to send data concerning the start time, quantity and time course of the delivery of a bolus via the data connection (3) to the control and evaluation unit (2) if the dosing device is caused to deliver a bolus repeatedly by an external device or directly by manual actuation of a switch by a user, • and that the control and evaluation unit is set up to display the temporal development of the degree of lung perfusion as a function of time as a trend representation.

The invention relates to the technical field of cable engineering construction progress management, and discloses a cable engineering construction progress intelligent prediction and management system, which comprises a multi-dimensional constraint data acquisition module for acquiring multi-source heterogeneous data of a working space; the construction impedance mapping module constructs a dynamic space-time impedance distribution model and calculates a construction impedance coefficient; the resource saturation threshold calculation module calculates the maximum effective resource bearing capacity by using an impedance-efficiency nonlinear attenuation model; and the scheduling instruction generation and numerical value clamping module executes nonlinear clamping when the resource demand exceeds the limit, locks the input amount and generates a process adjustment strategy. By introducing an impedance-efficiency coupling mechanism, the problem of calculation distortion of a linear progress model in a limited space is corrected from an algorithm level; it is ensured that the resource scheduling instruction conforms to the physical bearing rule, and efficiency collapse caused by the congestion effect is avoided.

The present application relates to the technical field of electronic harnesses, and specifically provides a method for processing anti-interference electronic harnesses, comprising: generating an impedance distribution curve through time domain waveform analysis, wherein the accuracy of the impedance distribution curve reaches the ohm level, identifying the reflection peak of the discontinuous point and the waveform baseline noise level, and determining the specific location of the impedance mutation; adjusting the connector size and via spacing in the bus structure according to the reflection peak of the discontinuous point in the impedance distribution curve, optimizing the path length for the signal propagation delay time, and reducing the attenuation rate of the reflected signal; constructing a virtual model of the bus structure using three-dimensional modeling software, importing the adjusted connector size and via spacing, setting the geometric parameter grid density to thousands of points per millimeter, and generating a digital twin; and using a frequency domain analysis method to calculate the input signal amplitude range and vibration mode frequency range of the optimized bus structure, and verifying whether the electromagnetic field coupling strength meets the matching requirements.

The invention provides an electrical performance detection method and system for a carrier plate, and the method comprises the steps: extracting the local impedance of a key node at a corresponding position in an excitation signal propagation path, and determining the local impedance deviation between adjacent key nodes based on the response correlation of the local impedance between the key nodes in a transmission path; a deviation area with impedance structure abnormity in the transmission path is identified through amplitude features of reflection waveforms between adjacent key nodes in the transmission path, and an impedance distribution diagram reflecting the electrical performance abnormal state of the carrier plate is constructed by combining reflection delay inequality between the adjacent key nodes; and performing fuzzy estimation on the impedance mismatch probability of each key node according to the local impedance deviation between the adjacent key nodes and the impedance distribution diagram to obtain the impedance mismatch membership degree of the carrier plate circuit at each key node position, and further performing abnormal positioning of the electrical performance defect of the carrier plate based on all the impedance mismatch membership degrees. By adopting the scheme of the invention, the abnormal feature recognition of the impedance performance defect of the carrier plate under the regional scale can be realized.

The invention provides a crosslinked polyethylene cable fault point positioning detection method. The method comprises an impedance distribution mapping step, a characteristic frequency analysis step, an excitation signal synthesis step, a signal detection step and a fault positioning step. In the impedance distribution mapping step, a broadband detection signal is injected into a single end of a to-be-detected cable, a reflection echo sequence of the whole length of the cable is obtained, and an impedance distribution map of the to-be-detected cable is constructed; in the characteristic frequency analysis step, an impedance mutation position is determined based on an impedance distribution map, reflection characteristics of the impedance mutation position in a frequency domain are calculated, and characteristic frequencies are screened out; in the excitation signal synthesis step, a composite excitation signal is synthesized based on the characteristic frequency, and the composite excitation signal is continuously injected into the cable to be detected; in the signal detection step, a magnetic induction probe is utilized to move along the path of a cable to be detected, and a phase jump value is obtained; in the fault positioning step, the spatial magnetic field intensity gradient and the phase jump value are subjected to logic correlation judgment, and a fault point is determined.

The embodiment of the invention discloses an electrode type judgment method and device, electronic equipment and a storage medium. The method comprises the following steps: in response to a current electrode type input operation of a user on a user interface for an implantable electrode, triggering an impedance measurement operation between contact combinations in the implantable electrode; when the impedance measurement operation is executed, obtaining a current electrode type of the implantable electrode input by the user in the user interface and a current impedance measurement result of the impedance measurement operation; determining a current impedance distribution characteristic corresponding to the current electrode type based on an incidence relation between a preset electrode type and the impedance distribution characteristic and the current electrode type; and determining a current judgment result of the current electrode type based on a preset judgment rule, the current impedance distribution characteristic and the current impedance measurement result. According to the technical scheme of the embodiment of the invention, the accuracy of the electrode type of the implantable electrode can be accurately and conveniently judged, so that a wrong electrode type input by a user can be corrected.

The invention discloses a reactance optimization credible capacity blocking relieving method, system and equipment and a medium, and the method comprises the steps: building a power grid impedance matrix and a power transfer distribution factor matrix, and defining a line fault distribution factor index to quantify a power flow transfer risk after a fault; a key line with unbalanced reactance and capacity distribution is accurately identified by using classification thresholds of credible capacity and line thermal capacity; based on a mixed integer linear programming model, line impedance distribution is optimized by dynamically adjusting fixed reactance, and the credible capacity of the line is improved; according to the method, through structural analysis and parameter collaborative optimization, in Monte Carlo simulation, feasible power generation plans are remarkably increased, the power generation disturbance variable is greatly reduced, the safety margin and economy of the power grid are remarkably improved, and the method is suitable for a modern power grid blocking management scene with high-proportion renewable energy access.

The application relates to the field of systems for adjusting electric variables, and discloses a dynamic resistance compensation adjustment method for a high-linearity potentiometer, which comprises the following steps: collecting real-time voltage and excitation current of an adjustment node, and calculating the apparent resistance of an adjustment tap position; using a first-order difference operator to extract a dynamic evolution gradient representing impedance distribution characteristics and interface random interference noise; comparing the evolution gradient with an ideal linear slope to determine a deviation ratio coefficient; adjusting the feedback branch gain according to the deviation ratio coefficient, and introducing a phase lead compensation link based on the change rate of the deviation ratio coefficient; the application generates a forward reverse adjustment level, neutralizes signal phase lag caused by micro contact hysteresis of materials, makes the output electric parameter stable in a preset linear interval, effectively reduces full-range linearity error, suppresses the interference of interface transition impedance fluctuation on adjustment smoothness, and ensures that a precision adjustment link maintains a high-precision adjustment reference in a wide-temperature environment.

The invention relates to a lithium battery online SOH (state of health) estimation method based on dynamic electrochemical impedance spectroscopy data, which comprises the following steps of: applying small signal disturbance to a key SOC (state of charge) point of a lithium battery charge-discharge cycle to obtain medium-high frequency electrochemical impedance spectroscopy data of each stage of the charge-discharge cycle; performing relaxation time analysis on the medium-high frequency electrochemical impedance spectroscopy data, and analyzing a mapping relation between a frequency domain and a time constant domain through deconvolution to obtain impedance distribution characteristics in the time constant domain; aiming at the impedance distribution characteristics, extracting a key characteristic subset representing the SOH change of the battery through characteristic importance evaluation, correlation analysis and redundancy control; and inputting the feature subset into a pre-constructed Gaussian process regression model to realize online SOH estimation of the lithium battery. According to the method, the dynamic electrochemical impedance spectroscopy is introduced into the lithium battery SOH estimation process, so that real-time monitoring and efficient evaluation in the battery operation process are realized.