36 results about "Electric field distortion" patented technology

This invention discloses a method and system for identifying safety hazards in power equipment, specifically relating to the field of intelligent operation and maintenance technology for power equipment. It addresses the hidden operational risks caused by the mismatch between equipment aging characteristics and generalized strategies in existing technologies. By collecting multi-source operating status data of power equipment and constructing an asynchronous dataset, it dynamically identifies spatial electric field distortion gradients and contact resistance fluctuations as abnormal parameters. Based on equipment structural characteristics, it assigns differentiated weights to these abnormal parameters, quantifying the risk levels of different areas. It analyzes the temporal correlation between contact resistance and electric field response to determine the breakdown risk caused by insulation degradation. Combining the risk levels, it generates maintenance cycle optimization schemes and electric field compensation parameters, and dynamically updates the aging model based on execution feedback. Through dynamic adaptation of equipment status and control strategies, it achieves early warning and precise intervention for potential hazards, effectively solving the control mismatch problem caused by neglecting material degradation characteristics in traditional methods.

This disclosure provides a method, apparatus, device, and storage medium for predicting the probability of lightning strikes on transmission lines. The method includes acquiring real-time distribution data of a target transmission line, inputting a preset environmental correction model, performing localized parameter calculations to obtain the physical field calculation parameter set and regional lightning discharge conditions for the target area corresponding to the target transmission line, inputting a charge movement model to determine the predicted electric field distortion data and the predicted charge concentration distribution data along the line, aligning the two with pre-acquired lightning measurement data spatiotemporally and performing error analysis to obtain error spatiotemporal distribution data, and adjusting the environmental correction model and the charge movement model accordingly. The final generated lightning strike probability report enables the prediction of spatial charge movement and electric field distortion under lightning strikes on high-altitude transmission lines and can specifically assess flashover risks, providing a quantitative analysis tool for differentiated lightning protection design of high-altitude ungrounded transmission lines.

This invention provides a method for intelligent monitoring and early warning of water droplet impact in substations during rainy weather, relating to the field of intelligent operation and maintenance and condition monitoring of substations. The method includes: acquiring dual-optical-path video streams; constructing a cross-spectral neural radiation field network; using joint high-dimensional features as input to output volume density and radiation color vectors; calculating the equivalent water film thickness from these two vectors to generate an equivalent water film thickness distribution field; mapping this field to a three-dimensional model, subdividing the mesh according to the thickness gradient modulus, and solving for the electric field to obtain the electric field distortion tensor and calibrate the high-discharge-risk critical region; generating a Lagrange particle set, solving the dynamic equations through smooth particle hydrodynamics, and simulating the water film evolution to obtain the probability of conductive water bridge connection; inputting the distribution field, distortion tensor, and connection probability into a multi-modal impedance reconstructor to generate an electrochemical impedance spectrum to obtain the dynamic insulation margin attenuation rate; and triggering an early warning based on the determined conditions. This invention significantly improves the timeliness and accuracy of early warning for external insulation faults during rainy weather.

This invention relates to the field of polymer dielectric materials and discloses a cyclic olefin copolymer / anthracene composite dielectric film for high-temperature energy storage, comprising 100 parts by weight of a cyclic olefin copolymer and 0.2 to 1.0 parts by weight of anthracene. The anthracene is uniformly dispersed in the amorphous network interstices of the cyclic olefin copolymer, utilizing the energy difference between their lowest unoccupied molecular orbitals to construct deep trap sites. By capturing free carriers injected at the electrode interface under high temperature and strong electric field conditions, electron migration is restricted, thereby blocking leakage conduction paths within the bulk phase of the material. This invention effectively reduces Joule heat accumulation during charge transport, improves the high-temperature withstand voltage and insulation reliability of the film, while maintaining relatively low dielectric loss. This all-organic blend system avoids local electric field distortion caused by inorganic filler agglomeration, and the preparation process is simple and mild, facilitating large-scale engineering applications.

This invention relates to the field of semiconductor processing technology, and more particularly to a deep learning-based method for monitoring semiconductor material processing. The method includes the following steps: extracting spatial distribution features of microcracks from microcrack spatial distribution data and analyzing the stress concentration at the microcrack tip; extracting electric field intensity distribution features, and combining the microcrack spatial distribution features and the stress concentration at the microcrack tip to analyze the distortion effect of microcracks on the local electric field distribution and the electric field enhancement effect at the microcrack tip, determining the local field strength shift caused by electric field distortion; constructing a coupling constraint relationship between microcrack structural features and microcavity migration behavior; inputting the coupling constraint relationship into a deep learning network to identify path deviation risks during microcavity migration and provide path deviation risk warnings. This invention effectively improves the stability and controllability of semiconductor microcavity structure processing by quantifying the potential influence of microcrack structure on the electric field distribution during microcavity migration.

The application belongs to the technical field of transformer detection, and provides a winding insulation fault detection method and system based on a low-noise dry-type transformer, which comprises the following steps: determining an electric field uniform disconnection period through an electric field distortion coefficient, pre-correcting a partial discharge amount, calculating a partial discharge correction amount, judging whether the partial discharge correction amount is within an error range, evaluating the necessity of correction, determining an electric field distortion period, correcting the partial discharge amount in the electric field distortion period, and judging and evaluating insulation faults after correction; comparing an insulation fault time point with the electric field distortion period, comparing insulation fault judgment results before and after partial discharge correction, judging insulation detection misjudgment risks caused by non-partial discharge correction, constructing a dynamically updated correction parameter library, correcting the discharge amount during subsequent detection, and improving the detection efficiency of subsequent winding insulation faults.

The application provides a spherical metal particle suppression structure, a GIS terminal and a GIS cable outlet system, and relates to the technical field of high-voltage electrical equipment. The spherical metal particle suppression structure is arranged in a metal shell (as a ground electrode) of a GIS terminal, and comprises a gradient electrode and a particle trap. The gradient electrode is sleeved on a conductive rod in the metal shell (both are coaxial with the GIS terminal), and the particle trap is arranged on the inner side wall of the metal shell and close to a power output end (connected to a high-voltage cable) of the GIS terminal. The outer diameter of the gradient electrode gradually decreases along the axial direction from a power input end (connected to a GIS device) to the power output end of the GIS terminal, and is coupled with the conductive rod and the ground electrode to form a directional non-uniform electric field, which can guide the spherical metal particles entering from the power input end to move to the power output end and fall into the particle trap to be captured. In this way, the spherical metal particles can be prevented from contacting the epoxy sheath of the power output end, and electric field distortion and discharge failure can be effectively avoided.

This invention discloses a multi-objective optimization method for high-voltage silicon carbide modules, relating to the fields of power semiconductor packaging and electromagnetic compatibility (EMC). It quantifies the transient electric field distribution vector of the switch and generates a dynamic admittance compensation scalar using a mapping function. Based on impedance offset, it calculates the resonant frequency offset of the parasitic loop and tunes the impedance topology parameters accordingly. This invention establishes the physical logic of field strength stress-driven impedance evolution, enabling local charge migration to be reflected as a controllable evolution of the resonant frequency. While suppressing electric field distortion, it actively drives interference energy to avoid sensitive frequency bands in the spectral space. This scheme unifies insulation reliability improvement and EMC performance control within the same physical response logic framework, effectively resolving the structural contradiction between insulation stress and electromagnetic interference in high-voltage power modules.

The application belongs to the technical field of polymer composites, and particularly relates to a high-voltage direct-current submarine cable insulation material and a preparation method thereof. The high-voltage direct-current submarine cable insulation material is prepared from raw materials including low-density polyethylene, fillers and functional additives. The fillers include micron fillers, submicron fillers and nanometer fillers. By selecting micron, submicron and nanometer fillers with three average particle sizes, the three fillers with different sizes construct wide-distribution trap energy levels in the matrix, effectively inhibit the injection and accumulation of space charges under a direct-current electric field, and the targeted surface modification of the three fillers can significantly improve the dispersibility and interface compatibility of the fillers. The prepared insulation material has significantly reduced space charge accumulation and controllable electric field distortion rate in a wide temperature range, and is suitable for high-voltage direct-current submarine cables.

The application discloses a method and device for eliminating electric field measurement distortion of a short-pole-distance seabed electromagnetic receiving base station, and relates to the field of seabed exploration. An electrical parameter model of each component of a measurement body is established, a seabed environment is simulated, and the electrical parameter model is combined to calculate the peripheral electric field distribution of the measurement body, so that electric field distortion caused by the measurement body is determined. The measurement body is subjected to basic optimization, and whether the electric field distortion corresponding to the measurement body after the basic optimization is eliminated is verified. If the electric field distortion is not eliminated, the measurement body is subjected to enhanced optimization, and whether the electric field distortion corresponding to the measurement body after the enhanced optimization is eliminated is verified. If the electric field distortion is eliminated, the electromagnetic receiving base station is calibrated and verified, and whether the electric field distortion is eliminated is verified. If the electric field distortion is eliminated, the electromagnetic receiving base station is put into use, and if the electric field distortion is not eliminated, the measurement body is subjected to basic optimization again. The method disclosed by the application can eliminate electric field distortion of a short-pole-distance seabed electromagnetic receiving base station, realize accurate measurement of a seabed electric field, and has wide application prospects and high practicability.

The application provides a method and device for constructing an electroacoustic coding model based on anisotropic conduction characteristics, and is applied to the technical field of biological signal processing. The method comprises the following steps: performing electrical stimulation and ultrasonic stimulation simulation on an anisotropic brain region model of a target object to obtain an electric field stimulation brain region model and an acoustic field stimulation brain region model; performing acoustic-electric intensity equalization on an electric field distortion brain region in the electric field stimulation brain region model and an acoustic field distortion brain region in the acoustic field stimulation brain region model respectively to obtain target electric field coding parameters and processing acoustic field coding parameters; based on the ultrasonic anisotropic conduction characteristics of the acoustic field distortion brain region, using acoustic anisotropic parameters, compensating and correcting the processing acoustic field coding parameters to obtain adaptive acoustic field coding parameters; according to a reference acoustic-electric coupling signal, feeding back and optimizing the adaptive acoustic field coding parameters to obtain target acoustic field coding parameters, and constructing a target acoustic-electric coding model according to the target electric field coding parameters and the target acoustic field coding parameters.

This invention relates to the field of transformer technology, providing a method and system for coupled analysis of bubble movement and electric field distortion in transformer oil. The method includes: constructing a two-dimensional geometric simulation model of a needle-plate electrode; describing the synergistic effects of electric force, buoyancy, gravity, drag, drag force, and surface tension on bubble deformation, migration, and coalescence behavior within the two-dimensional geometric simulation model using a set of coupled electric field-flow field-phase field equations; and the evolution law of the electric field intensity inside the bubble being dominated by the voltage phase and increasing near the tip electrode; meshing the computational domain and setting the time step and solver; performing numerical calculations on the coupled electric field-flow field-phase field equations; and extracting field quantity data and generating contour maps after post-processing. This method can realistically reflect the intrinsic mechanism of partial discharge caused by the dynamic behavior of bubbles, providing theoretical support for precise prevention and early warning of transformer insulation faults.

This application relates to the field of power transmission equipment monitoring technology, and particularly to a method and apparatus for detecting insulation defects in ultra-high voltage direct current (UHVDC) GIS. The method includes: acquiring photon counting signals and ultra-high frequency (UHF) signals from the gas-insulated metal-enclosed switchgear (GIS); determining whether the photon counting signal meets preset warning conditions; if the photon counting signal meets the preset warning conditions, then denoising and discretizing the UHF signal to obtain corresponding UHF data; generating feature maps of multiple parameter pairs based on the UHF data; and using the feature maps as an index to query a preset partial discharge feature fingerprint database to obtain the insulation defect detection results of the GIS. This solves the problem in related technologies where low-level electric field distortion caused by micro-defects or initial defects makes it difficult to detect insulation degradation in GIS in a timely manner, resulting in insufficient detection sensitivity and timeliness.

The application relates to a heat-conducting intelligent insulation material with nonlinear volt-ampere characteristics, a preparation method and application thereof, and belongs to the technical field of insulation materials. The intelligent insulation material comprises a polymer matrix and SiC nanofiber felt in the polymer matrix, the volume fraction of the SiC nanofiber felt is 0.5%-2% of the polymer matrix, the SiC nanofiber felt is assembled by roughly same-direction SiC nanofibers, and the SiC nanofibers are arranged in parallel or vertically in the polymer matrix. The scheme provided by the application can optimize the heat conduction path of the intelligent insulation material, and the high heat conduction and nonlinear volt-ampere characteristics of the material are considered, the problem of low heat dissipation efficiency of the packaging material is solved, the composite material is endowed with the electric field self-adaptive regulation and control ability of low-field insulation and high-field conduction through the nonlinear volt-ampere characteristics, and the aging breakdown problem of the composite material when facing the electric field distortion phenomenon is relieved.

The application relates to a composite dielectric based on in-situ growth of an insulating layer modified silicon rubber / polypropylene interface, a preparation method and application thereof, and belongs to the technical field of cable accessory insulation material and polymer interface modification. The composite dielectric based on in-situ growth of an insulating layer modified silicon rubber / polypropylene interface is characterized in that a SiO2 insulating layer is grown at the interface of the silicon rubber and the polypropylene by using a sol-gel method; the sol-gel method is to prepare a mixed system with different proportions by adjusting the volume ratio of tetraethyl orthosilicate as a precursor and anhydrous ethanol, and then to use ammonia as a catalyst and deionized water to promote the hydrolysis reaction. The application is aimed at the problem that the PP has excellent insulation performance but the PP / SiR interface has insufficient electrical performance, and a uniform and dense inorganic transition layer is constructed to effectively inhibit the interface charge accumulation and electric field distortion, improve the bulk breakdown field strength of the modified silicon rubber and the PP / modified silicon rubber interface breakdown voltage, and has good insulation stability and engineering application prospect.

This invention discloses an insulator insulation condition assessment method and system based on ultraviolet and visible light image fusion. The method includes: reconstructing the three-dimensional structure of the visible light image to build a three-dimensional geometric model of the insulator and establishing a theoretical electric field distribution model; detecting discharge spots in the ultraviolet image and extracting the geometric and optical parameters of the discharge spots; mapping the discharge spots onto the three-dimensional geometric model to obtain the three-dimensional spatial distribution of the discharge points and the equivalent discharge intensity; equating the discharge points with point charge sources, constructing an electric field distortion inversion equation, solving it to obtain the distorted electric field distribution, identifying the electric field distortion region, and quantifying the degree of distortion; and based on the location, range, and degree of distortion of the electric field distortion region, inverting the degradation type, degree of degradation, and range of degradation to generate the insulation condition assessment result. This method achieves a leap from phenomenon recognition to mechanism diagnosis, solving the technical problems of existing assessment methods lacking physical interpretability and being unable to distinguish degradation types.

The present disclosure relates to a direct-current power cable system. More specifically, the present disclosure relates to a direct-current power cable system capable of preventing or minimizing electric field distortion due to a local electric field concentration and insulation breakdown of a cable joint box by alleviating the electric field of a portion where space charges are excessively accumulated inside a sleeve member of an intermediate connection structure of an ultra-high voltage direct-current power cable.

The application relates to the technical field of insulating materials, and discloses an insulating material composition, an insulating material, a preparation method and application.The composition comprises a base polypropylene, an elastomer fiber and an antioxidant; the elastomer fiber is selected from styrene-ethylene-butylene-styrene block copolymer and / or polyurethane copolymer; the tensile strength of the elastomer fiber is greater than or equal to 10 MPa, the elongation at break is greater than or equal to 400%, and the embrittlement temperature is less than or equal to -40 DEG C.The non-crosslinked polypropylene insulating cable material prepared by using the composition has good mechanical properties and electrical properties, high breakdown strength and small electric field distortion rate.

This invention relates to a modeling method for the insulation electric field of a flexible press-fit IGBT sub-module considering nonlinear conductivity characteristics. Belonging to the field of power electronic device insulation design technology, it solves the problem that traditional linear models cannot accurately simulate electric field distortion and Joule heat loss under high temperature and high field strength conditions. The technical solution uses an ion-jumping conductivity model and Arrhenius law to fit the nonlinear conductivity parameters of polyimide, silicone rubber, and polyetheretherketone (PEEK), establishing a two-dimensional finite element model. A non-ideal step voltage condition is input, and electrothermal boundary conditions are applied to calculate the evolution of the electric field distribution from the turn-off transient to the steady state. This achieves dynamic and accurate simulation of electric field stress under electrothermal coupling, revealing the law of maximum field strength migration from the three bonding points to the terminal edge, providing key theoretical support for the insulation optimization of flexible press-fit IGBTs.

The present invention provides a semiconductive composition for a cable, comprising: (a) a polyolefin-based resin containing at least one functional group selected from the group consisting of maleimide-based one and allyl ester-based one; and (b) a carbon-based material containing at least one selected from the group consisting of carbon black and carbon nanotubes. According to the present invention, space charge characteristics are improved such that problems of electric field distortion or long-term insulation lifetime deterioration can be solved, mechanical properties and processability are excellent, cross-linking characteristics and scorch stability can be improved, and high-temperature volume resistance, electrical characteristics allowing withstanding of high direct-current voltage and surface smoothness can be excellent. In addition, space charge in the direct-current power cable can be suppressed to ensure long-term reliability and long-distance power transportation is enabled.

This invention discloses a medium- and high-voltage cable and its manufacturing method, relating to the field of power cable materials and manufacturing technology. The cable comprises, from the inside out, a conductor, a conductor shielding layer, an insulation layer, a gradient compatibility buffer transition layer, an insulation shielding layer, a metallic shielding layer, an inner liner, an armor layer, and an outer sheath layer. The gradient compatibility buffer transition layer is disposed between the insulation layer and the insulation shielding layer, and is a continuous gradient layer formed by integral co-extrusion of multiple strands of semi-conductive polyolefin-based composite melts with different compositions in a radial sequence, and retained after cross-linking and segmented cooling. This invention reduces space charge accumulation and electric field distortion, improves the stability of the transition layer structure, and enhances the long-term operational reliability of the cable.

This invention relates to the field of power system operation monitoring technology, and provides an intelligent inspection method and system for potential hazards in transmission lines based on image recognition. The method includes: acquiring operational status data of a DC terminal station in the transmission line, and image data of a target corona ring; obtaining the current geometric center and initial light intensity centroid of the target corona ring based on the image data; determining the current operating polarity of the terminal station based on the operational status data; obtaining the polarity correction factor corresponding to the operating polarity for correcting the initial light intensity centroid; and calculating the corrected light intensity centroid. This invention enables intelligent and quantitative inspection of the corona ring operation status of DC terminal stations, achieving intelligent inference of electric field distortion and corona discharge risk without the need for additional sensors. This invention overcomes the shortcomings of traditional inspections that rely on manual experience and cannot quantitatively assess eccentricity risk, significantly improving the accuracy and efficiency of hazard identification.

The utility model discloses a high voltage switchgear of high insulating performance, including the cabinet, the cabinet front side assembly has the protective door, the cabinet inner chamber is close to the assembly of upper side department and has the wiring cabinet, the wiring cabinet inner chamber bottom is provided with a plurality of wiring terminal, the detachable connection of wiring cabinet front side wall has the sealing cover, the wiring cabinet inner chamber is located between wiring terminal and is provided with a plurality of insulating partition, the insulating partition bottom all is fixedly connected with the clamping block, the insulating partition top all is seted up with the clamping groove, the utility model discloses can effectively improve insulating property, through increasing along the surface distance, the breakdown of conductive channel, reduces electric field distortion etc. mode, reduces the discharge risk between copper medal.

The application provides a plasma discharge ion source and application thereof in a FAIMS system. The mounting body is made of insulating material and has a first electrode plate cavity and a second electrode plate cavity which are distributed along the width direction of the mounting body and are spaced apart from each other, and a plurality of groups of through pipe cavities which are parallel arranged and are distributed along the height direction of the mounting body, and the pipe cavities are located between the first electrode plate cavity and the second electrode plate cavity. The first electrode plate is integrally formed by alloy molten liquid in the first electrode plate cavity. The second electrode plate is integrally formed by alloy molten liquid in the second electrode plate cavity. The plasma discharge ion source adopts the layout of the insulating mounting body integrated with the electrode plate cavity and the plurality of groups of pipe cavities, the electrode plate is integrally formed by alloy molten liquid in the cavity, the mechanical assembly process is omitted, there is no assembly gap, the positioning precision is high, electric leakage and electric field distortion are avoided, the plurality of groups of parallel arranged pipe cavities can form a plurality of plasma jet flows, the coverage is large, the discharge is uniform, and the overall structure is compact and has high integration.

The application discloses a kind of offshore submerged oil electric pump over packer cable high-efficiency docking tools, including assembly frame, limiting mechanism and cutting mechanism, limiting mechanism is located on assembly frame, limiting mechanism is used to position cable copper core, cutting mechanism includes cutting support base, first tooth cutter, second tooth cutter and first power component, cutting support base is located on the bottom of assembly frame, cutting support base is used to support cable copper core, first tooth cutter is located on the side of cutting support base, second tooth cutter is located above first tooth cutter, first power component is used to drive second tooth cutter vertical movement, second tooth cutter and first tooth cutter cooperate and cut cable copper core into sawtooth shape.This application makes copper core cutting shaping into sawtooth shape, two sections of copper core after cutting are engaged with each other, can play the role of tensile and compressive working condition, ensure the continuity of cable, greatly reduce local electric field distortion effect, and then extend pump inspection cycle, improve oilfield annual recovery rate.

This application relates to a semiconductor device structure and its fabrication method. The semiconductor device structure includes: a substrate of a first conductivity type; a drift region including pillars of a first conductivity type and pillars of a second conductivity type; the pillars of the second conductivity type and the pillars of the first conductivity type are alternately arranged in a direction parallel to the surface of the substrate; a carrier storage layer of the first conductivity type is located on the side of the drift region away from the substrate; a plurality of spaced-apart first gate trench structures penetrate the carrier storage layer along the thickness direction and extend into the pillars of the second conductivity type; and a first injection region of the second conductivity type is located within the carrier storage layer and between adjacent first gate trench structures extending into the same pillar of the second conductivity type. This application can hinder the outflow of holes when the semiconductor device structure is turned on, thereby reducing turn-on losses and turn-off losses; it can also reduce the electric field distortion between the first gate trench structures, thereby reducing EMI oscillations and ensuring the withstand voltage reliability of the semiconductor device structure.