62 results about "Electric field computation" patented technology

Disclosed are a method for designing lightning shielding by using diverter strips on an aircraft, a system, a device, and a medium. The method comprises: determining boundary conditions of a simulation space; according to the boundary conditions of the simulation space, performing numerical calculation on an electric field in the simulation space; according to the calculation result of the electric field and in combination with fractal theory, determining a probability of the direction of lightning leader development, and, according to the probability of the direction of lightning leader development, randomly selecting a subsequent development position of a lightning downward-moving stepped leader; determining, on the basis of testing and simulation results of a corona discharge characteristic at the tip of a metal electrode having a small radius of curvature, whether an initial corona at an end portion of a diverter strip has been initiated, and determining whether an initial corona at an end portion of a diverter strip has been initiated; determining whether the lightning downward-moving stepped leader can, after attaching to an insulating plate, run through a gap along the surface and reach an adjacent diverter strip; repeating the process above, and performing multiple simulations to solve the probability of lightning protection of diverter strips and establish a relationship between the probability of lightning protection of diverter strips and the distance between the diverter strips at different thicknesses of and using different materials for the insulating plate.

The invention discloses a direct current bushing electric field calculation method and device considering a charge accumulation effect. The method comprises the following steps: establishing a mathematical model and boundary conditions by considering four current carriers of trap electrons, trap holes, free electrons and free holes and four recombination processes of free electron-free holes, trap electron-free holes, free electron-trap holes and trap electron-trap holes existing in an insulating material of the direct current bushing; and in combination with the boundary conditions, solving the mathematical model by adopting a finite element algorithm to obtain charge distribution and electric field distribution in the direct current bushing under the action of an external electric field. According to the method, the electric field in the sleeve can be accurately calculated, and a basis is provided for accurate evaluation of the equipment operation state.

The invention discloses a dynamic simulation method and system for the opening and closing process of an SF6 circuit breaker, and relates to the technical field of SF6 circuit breaker performance analys.The method comprises the steps that an arc extinguish chamber simulation model is built according to actual parameters of an arc extinguish chamber of the SF6 circuit breaker, and no ablation point is arranged in a contact area in the arc extinguish chamber simulation model; and carrying out dynamic simulation calculation on the opening process of the SF6 circuit breaker by utilizing the laminar flow field calculation model, the electric field calculation model, the pre-breakdown criterion of the arc extinguish chamber, the contact moving grid calculation model of the arc extinguish chamber and the set boundary conditions and combining with the arc extinguish chamber simulation model. According to the method, the laminar flow field calculation model is combined to perform dynamic simulation calculation on the opening process of the SF6 circuit breaker, and the flow characteristics of the SF6 gas in the SF6 circuit breaker are considered in the process, so that the obtained first dynamic simulation result is more fit with the actual opening process of the SF6 circuit breaker, and more accurate data support is provided for optimizing design parameters of the SF6 circuit breaker.

The invention relates to a calculation method and device for a series vacuum gap breakdown development process. The method comprises the following steps: constructing a series vacuum gap equivalent circuit model according to a plurality of vacuum gap equivalent vacuum gap parallel circuits; based on the series vacuum gap equivalent circuit model, determining a diversion coefficient of the vacuum gap according to plasma parameters of the cathode plasma and an electric field calculation model of the vacuum gap; based on the series vacuum gap equivalent circuit model, determining vacuum gap equivalent resistance according to the plasma expansion radius of the cathode plasma and the diversion coefficient of the vacuum gap; based on the series vacuum gap equivalent circuit model, determining vacuum gap breakdown voltage according to the vacuum gap breakdown data; and calculating the vacuum gap breakdown development process of the series vacuum gap according to the vacuum gap equivalent resistance and the vacuum gap breakdown voltage. By adopting the method, the application risk of the series vacuum gap in high voltage can be reduced.

The invention relates to a neural network-based high-voltage live-line work safety early warning method. The method comprises the following steps of 1, establishing a high-voltage transmission line electric field calculation model by using a surface charge method; 2, establishing an overall three-dimensional model of the transformer substation; 3, constructing a signal processing circuit of the power frequency electric field sensor, capturing electric field information in real time through the power frequency electric field sensor, and converting the electric field information into a processable electric signal; 4, real-time data from the power frequency electric field sensor are received, feature extraction and classification are carried out by adopting an early warning method based on a convolutional neural network, and potential safety hazards are identified; 5, establishing a neural network-based high-voltage live working safety early warning comprehensive platform integrating data acquisition, processing, analysis and early warning; the method has the advantages that the neural network algorithm is adopted, the distance and the azimuth angle are accurately judged, live-line work is early warned, and the accident rate is greatly reduced.

The invention discloses a sleeve silicone rubber electrical aging state evaluation method, system and device and a medium. The evaluation method comprises the following steps: constructing a microcosmic molecular model of the sleeve silicone rubber; applying an external electric field on the microscopic molecular model; calculating electrical characteristic parameters and infrared spectrums of the sleeve silicone rubber under different external electric field intensities; based on the electrical characteristic parameters and the infrared spectrum, establishing an evaluation model of correlation between the sleeve silicone rubber microstructure change and the infrared spectrum; and according to the evaluation model, predicting the electrical aging state of the sleeve silicone rubber through the change trend of the infrared spectrum. The evaluation method based on microstructure change is provided for macroscopic performance prediction of the sleeve silicone rubber under the action of an electric field, nondestructive testing and evaluation can be carried out on the electrical aging state of the sleeve silicone rubber, the experiment cost is remarkably reduced, the experiment time is remarkably shortened, and the evaluation accuracy and convenience are improved.

The invention relates to an alternating current GIS insulator metal particle inhibition method based on surface fluorination, which changes the surface appearance of an insulator and the surface electric field distribution of an insulating material under an alternating current electric field by performing fluorination modification treatment on the surface of the insulator so as to regulate and control the motion behavior of charged particles around the insulator. Through electric field calculation and stress analysis, the motion characteristics of metal particles near the insulator are simulated, the metal particles with different particle sizes are released at different positions of the inner surface of the GIS grounding shell, the change of the motion characteristics of the metal particles is evaluated, and the fluorinated insulator effectively inhibits the activity of the metal particles and inhibits the adsorption effect of the insulator on the nearby metal particles. The method can effectively inhibit the insulator in the GIS from adsorbing nearby metal particles, prevents insulation failure accidents, improves the reliability and stability of high-voltage electrical equipment, and has the advantages of simple operation process, industrialization, easy realization, universality and the like.

The present invention discloses an electric field calculation method for an atomic gas chamber based on Rydberg atom electric field measurement in the field of atomic measurement devices, comprising the following steps: S1: Construct a model of an electric field loading device, and calculate the electric field strength E between the electrode plates through the electric field calculation formula E = U / d in a uniform electric field; S2: Calculate the polarization charge density P of the glass atomic gas chamber under the action of the electric field; S3: Calculate the polarization charge Q2 in the glass material; S4: Combine steps S2 and S3 to calculate the electric field strength E0 generated by the polarization charge Q2 of the glass material; S5: Subtract the electric field strength E0 generated by the polarization charge Q2 of the glass material from the electric field strength E between the electrode plates to obtain the precise electric field strength E1 inside the glass atomic gas chamber. The beneficial effect of the present invention is that by calculating the electric field strength between the electrode plates and the electric field strength generated by the polarization charge in the atomic gas chamber material, and subtracting the two, the precise electric field strength inside the atomic gas chamber can be obtained.

This application provides a simulation system and method for the AC characteristics of vacuum diodes based on a physical information neural network, belonging to the field of numerical simulation technology for electronic devices. The system includes a particle injection module, a particle deposition module, a Poisson equation solving module, an electric field calculation module, and a particle propulsion module. The particle injection module continuously injects electron particles; the particle deposition module maps particle information to a grid and calculates the electron density; the Poisson equation solving module uses a physical information neural network method to solve for the potential distribution based on the electron density; the electric field calculation module obtains the spatial electric field; and the particle propulsion module updates the particle velocity and position, forming a self-consistent coupled simulation. This application achieves continuous and smooth potential solutions through hard constraint embedding of boundary conditions, two-stage optimization, and loss scale adjustment mechanisms, reducing grid dependence and improving computational accuracy and efficiency. It is suitable for numerical simulation of vacuum electronic devices, electron beam systems, and space charge transport problems.

The invention discloses a geomagnetic disturbance geoelectric field calculation method based on a block geoelectric structure, relates to the technical field of geomagnetic disturbance geoelectric field calculation, and solves the technical problem of low GIC calculation accuracy in complex geology. According to the method, in a macroscopic scale, a one-dimensional conductivity model is inverted by using long-period magnetotelluric sounding, and a regional structure framework is delimited by combining a geological map, so that the accuracy of a global electrical background is ensured; a three-dimensional electrical structure is constructed through audio magnetotelluric sounding in the mesoscale, a secondary geological unit is recognized, and the problem that a traditional model is insufficient in depicting transverse electrical differences is solved; in the microscopic scale, for a key area, high-density resistivity imaging and a controllable source audio magnetotelluric method are used for capturing a high-conductivity / low-resistance anomalous body, and fine modeling of a local area is achieved; according to the method, the geological complexity is mined through the multi-scale model, so that the calculation precision of the GIC is improved.

The invention belongs to the field of reactors, and relates to a method for designing an equivalent scaling model of an extra-high voltage reactor, which comprises the following steps of: designing and installing an equivalent scaling indirect outgoing line structure comprising an L-shaped equivalent scaling indirect outgoing line ascending flanged base and an equivalent scaling outgoing line device; an equivalent scaling indirect outgoing line ascending flanged base is fixedly installed on the side wall of a reactor oil tank, an online monitoring interface and a sensor are arranged on an equivalent scaling model, and a direct outgoing line sleeve and an indirect outgoing line sleeve are installed on the equivalent scaling model; synchronously correcting the inner diameter and the size of the equivalent scaling wire outlet device according to an electric field simulation result until the safety margin and the electric field intensity are consistent with 1000 kilovolts; according to the electric field calculation result, the thickness of an insulating paperboard and the oil gap size of the equivalent scaling wire outlet device are finely adjusted until the safety margin and the electric field intensity are consistent with 1000 kilovolts. On the premise that the voltage level and fault energy are reduced, fault verification of discharging, heating, burning explosion and the like is achieved, and the effectiveness of the sensor and the installation position is verified.

The invention belongs to the field of electromagnetic field numerical solution, relates to antenna electromagnetic simulation, and particularly provides an error field energy-based grid adaptive encryption method, which comprises the following steps of: modeling a target antenna, introducing corresponding excitation and boundary conditions, determining an adaptive frequency point and a solution frequency band, and establishing an electromagnetic simulation model; secondly, carrying out primary division and finite element electromagnetic simulation calculation on a computational domain by adopting a tetrahedral mesh to obtain an electric field at each element node of the tetrahedral mesh, calculating energy corresponding to an error field on an interface of each element, and carrying out posterior error estimation; and finally, calculating a grid encryption strategy according to a posterior error, including an encryption unit and an encryption size, performing simulation calculation again after encryption, and repeating the process until a solution meets a precision requirement. In conclusion, according to the method, the part, not meeting the constraint condition, of the electromagnetic field solution serves as an error source, corresponding energy serves as posterior error estimation, and grid self-adaptive encryption is achieved.

The application provides a kind of network matching not power operation control system based on three-dimensional point cloud, it is related to image processing technical field, the application carries out geometric analysis to three-dimensional point cloud model, and identifies the high curvature geometric discharge candidate point set;And fusion real-time sensing electric field distribution and air charge density data, for each candidate point calculates critical discharge tendency index to carry out physical risk empowerment;Through weighted density clustering algorithm, the discharge risk source area composed of high-risk points is identified.The system also compares the actual electric field with the theoretical simulation electric field, calculates the electric field topological distortion degree, to find out the hidden faults caused by non-geometric factors.Finally, the system executes the hierarchical safety strategy according to the risk source area level or distortion degree result, such as constructing dynamic safety boundary or implementing fault isolation.The application can detect the explicit and hidden risks comprehensively, and can execute fine safety control, which improves the safety and intelligent level of operation.

The application relates to a method and device for calculating the development process of series vacuum gap breakdown. The method comprises the following steps: constructing a series vacuum gap equivalent circuit model according to a plurality of vacuum gap parallel circuits; determining a flow conductance coefficient of the vacuum gap based on the series vacuum gap equivalent circuit model, plasma parameters of cathode plasma and an electric field calculation model of the vacuum gap; determining a vacuum gap equivalent resistance based on the series vacuum gap equivalent circuit model, a plasma expansion radius of the cathode plasma and the flow conductance coefficient of the vacuum gap; determining a vacuum gap breakdown voltage based on the series vacuum gap equivalent circuit model and vacuum gap breakdown data; and calculating the development process of the series vacuum gap breakdown based on the vacuum gap equivalent resistance and the vacuum gap breakdown voltage. The method can reduce the application risk of the series vacuum gap at high voltage.

The invention discloses a highly-integrated cylindrical surface near-far field transformation rapid calculation method and system, and the method comprises the following steps: S1, determining a mode for carrying out the cylindrical surface near-far field transformation of near-field measurement data, and carrying out the representation through a far-field electric field calculation formula; s2, according to the near-field measurement data, calculating to obtain a weighting coefficient compensated by the probe, performing acceleration processing by using FFT Fourier transform in the calculation process, and substituting the obtained weighting coefficient into a far-field electric field calculation formula to obtain a far-field result of the measured antenna; s3, the phase center of the antenna is obtained through calculation according to the far-field result in the S2, phase deviation caused by the phase center is compensated to the far-field result obtained through calculation in the S2, and finally the accurate far-field result of the tested antenna is obtained. The method comprises the processes of probe compensation, phase center calculation and compensation, FFT acceleration and the like, near-far field transformation simulation calculation of the tested antenna can be powerfully supported, and the accuracy of a calculation result is improved.

The invention discloses a temperature change electric field prediction method and device based on a multi-phase heterogeneous interface, equipment and a storage medium. The method comprises the following steps: acquiring a dielectric property characterization data set; performing electric field distribution calculation based on the dielectric property characterization data set to obtain a temperature change electric field calculation result; performing model construction according to a temperature change electric field calculation result to obtain a temperature change electric field prediction model; and inputting the data of the multi-phase heterogeneous interface material into the temperature-variable electric field prediction model for fitting calculation to obtain a temperature-variable electric field prediction result. According to the method, the temperature change electric field prediction model is constructed based on the dielectric property characterization data set, and then fitting calculation is performed through the temperature change electric field prediction model to obtain the temperature change electric field prediction result, so that high-precision electric field prediction is realized, and the insulation reliability of equipment is improved.

The invention discloses a method for obtaining phase distribution of a plane reflection array antenna based on a multi-target algorithm. The method comprises the following steps: designing a plane reflection array; establishing a near-field electric field calculation model through the parameters of the plane reflection array, and defining a forming target area and a limiting target area; respectively establishing a first target loss function and a second target loss function according to the forming target and the limiting target; an NSGA-III multi-objective optimization algorithm is adopted to carry out optimization solution, a contradictory relation between a forming objective and a limiting objective in a solution set is analyzed based on a Pareto graph, the range of a limiting area is adjusted, and an optimized second objective loss function is obtained; and solving the optimized second target loss function, selecting a Pareto optimal phase distribution scheme in an optimal solution set, designing a reflective array antenna, and verifying a near-field rectangular focal spot generation effect. According to the method, the target is adjusted through a method of improving the loss function, so that a better shaping effect is obtained.

The invention relates to the field of electromagnetic radiation detection, and discloses an electromagnetic radiation absorbed dose detection circuit and method and a portable device, the electromagnetic radiation absorbed dose detection circuit is provided with an electric field voltage conversion module, a low-pass filtering module, a resistance transmission line and a broadband signal receiver which are connected in sequence, and the electric field voltage conversion module is connected with the broadband signal receiver through three sub-conversion modules arranged in a three-dimensional orthogonal structure; three-axis component electric field signals are collected in a radar near field and converted into a plurality of corresponding component voltage signals, each component voltage signal is input into a low-pass filtering module to be filtered, each filtered voltage signal is obtained and sent to a broadband signal receiver through a resistance transmission line to be subjected to electric field calculation, and the electric field is calculated. The corresponding human body electromagnetic exposure specific absorption rate is obtained. According to the invention, the detection of the electromagnetic exposure specific absorption rate of the human body can be effectively realized, the detection precision of the specific absorption rate can be effectively guaranteed, and the detection modes of the electromagnetic exposure specific absorption rate of the human body in a radar near field are diversified.

The invention provides a model adjustment method and a related device, and relates to the field of valve side wire outlet devices. For a specified voltage value, such as an extra-high voltage value, a preset voltage amplitude smaller than the voltage value is set, a reference electric field calculation model of the preset voltage amplitude is constructed, a reference performance parameter of the model is determined, and based on difference data of the reference performance parameter and a target performance parameter of the valve side wire outlet device corresponding to the specified voltage value, the valve side wire outlet device is calculated. And adjusting the model structure of the reference electric field calculation model until the reference electric field calculation model meeting the preset difference range requirement is obtained. The performance parameters of the reference electric field calculation model are similar to those of the extra-high-voltage valve side wire outlet device, so that when the reference electric field calculation model is used for constructing the valve side wire outlet device, the obtained device can serve as an equivalent device of the extra-high-voltage valve side wire outlet device to replace the extra-high-voltage valve side wire outlet device for subsequent test work, and the test efficiency is improved. And the subsequent test cost and the occupied area can be reduced.

The invention belongs to the technical field of electric power system electromagnetic field simulation, and relates to an electric field calculation system and method for an offshore flexible straight valve hall. Comprising the following steps that valve hall design parameters are obtained, and the design parameters at least comprise an original drawing, space size information and voltage excitation conditions of electrical equipment; based on the original drawing and the spatial size information, establishing a three-dimensional geometric model containing main electrical equipment in the valve hall; importing the three-dimensional geometric model into a finite element analysis environment, defining the material attribute of each part, and applying a boundary condition corresponding to the voltage excitation condition; and grid division is carried out on the model after the boundary condition is applied, electrostatic field solving calculation is carried out, an electric field distribution result of the internal space of the valve hall is obtained, and the electric field distribution result is output. According to the invention, accurate and efficient simulation of electric field distribution in the complex valve hall is realized.

The invention relates to the technical field of electric field precision measurement, and discloses a LabVIEW-based EIT-AT spectral feature recognition and electric field calculation device, and the device comprises a signal collection module which is used for detecting a detection light signal, and carrying out the signal amplification and analog-to-digital conversion processing of the detection light signal, and obtaining a detection light digital signal; the data processing module is used for receiving the detection light digital signal and the Rydberg state parameter, calculating a frequency scale, and performing filtering conversion and peak identification on the detection light digital signal to obtain the set peak number of the noise-removed detection light digital signal and the coordinate of the set peak number; the coordinates of the set wave crest number are sorted from large to small, then a frequency scale is introduced, and the frequency spacing is calculated; the quantum parameter and electric field calculation module is used for receiving the frequency spacing and the Rydberg state parameter, calculating a transition dipole moment and calculating the electric field intensity according to the transition dipole moment and the frequency spacing; according to the invention, the measurement process is simplified, and the automation level, accuracy and efficiency of measurement are greatly improved.

The invention relates to a DC GIS insulator contour optimization method considering transient reliability. The DC GIS insulator contour optimization method comprises the following steps: defining insulator contour variables based on parameterized curve fitting; calculating a direct current charging electric field based on a partial differential equation; calculating an electric field under the action of tolerable transient voltage based on a partial differential equation; carrying out target optimization modeling; and carrying out optimization solution based on a self-adaptive covariance evolutionary strategy. According to the method, an insulator contour target optimization model taking a basin-type insulator contour variable as a decision variable, taking the weighted sum of the maximum value of the insulator surface electric field intensity under the action of a minimized direct current voltage as a target function, and taking the maximum value of the electric field intensity under the action of polarity inversion and lightning impulse voltage as a constraint condition is adopted; the optimal geometrical shape of the basin-type insulator is solved by utilizing a self-adaptive covariance evolutionary strategy, and the surface electric field intensity of the insulator is reduced to the greatest extent and the insulating property of the insulator is improved on the premise of meeting an allowable value specified by a design criterion and ensuring the transient voltage tolerance reliability.

The invention discloses a method for simulating the discharge pulse of an insulating medium based on the full current law. In the method, the electric field calculation control equation taking into account the full current is used to replace the Poisson equation in the fluid dynamics drift diffusion model and the bipolar load sub-model, and the coupling relationship between the electric field calculation control equation taking into account the full current and the current continuity equation is supplemented, and a finite element model based on the full current law is constructed, so as to realize the simulation calculation of the discharge of the insulating medium considering the influence of the conduction current and the interface charge. In the method, the insulating medium in the electrical circuit is equivalent to a current source, and the output current of the current source is used as the calculation condition of the current source port voltage, which is solved by the finite element model based on the full current law, and the current source port voltage calculated according to the output current and Kirchhoff's law is used as the boundary condition of the finite element model based on the full current law. This field-circuit coupling form of the calculation model realizes the simulation of the pulse current caused by the discharge of the insulating medium.

The invention provides a method and a device for selecting parameters of a frequency division type disconnector. The method comprises the following steps: acquiring initial physical parameters; electric field calculation and magnetic field calculation are carried out on the initial physical parameters to obtain electromagnetic parameters, a heat source item and electromagnetic force are calculated according to the electromagnetic parameters, and the electromagnetic parameters comprise electric field intensity, current density and magnetic field intensity; solving an energy conservation equation, a mass conservation equation and a momentum conservation equation simultaneously under the temperature field boundary condition and the flow field boundary condition by using the heat source item and the electromagnetic force to obtain a temperature field, a velocity field and a pressure field; and selecting target parameters of the frequency division type disconnector according to the temperature field, the velocity field and the pressure field, wherein the target parameters comprise a discharge gap distance, an inductance value of a frequency division inductor, a spark gap distance and a resistance value of a heating resistor. According to the invention, the problem of low performance of the disconnector caused by lack of system selection of parameters of the frequency division type disconnector in the prior art is solved.

The present invention provides a method and system for rapid simulation of radiofrequency ablation based on the Monte Carlo method, which performs clustering preprocessing on the calculation domain according to image information, constructs a reduced simulation model, reasonably simplifies the electric physical field coupling calculation, uses the finite difference method to calculate the thermal physical field, and iteratively performs rapid thermal / electric physical field coupling calculation; based on CUDA, GPU hardware is used to accelerate the model construction and numerical calculation process in the simulation calculation process. The present invention realizes mixed high- and low-precision voxel grid modeling, alleviates the problem of redundant calculation caused by traditional modeling methods; realizes automatic reduction of symmetrical and equivalent positions, automatically excludes areas that do not need to be calculated from the calculation domain, and reduces the amount of calculation; reasonably simplifies the electric field calculation, combines GPU hardware acceleration, and realizes rapid electric field calculation; realizes accelerated calculation of electric / thermal coupling field, and provides real-time temperature field calculation of the surgical area.

The application discloses a quick finite difference solution method and system of seismic-electric wave field under different saturations, belongs to the technical field of seismic wave field numerical simulation in geophysical exploration, and comprises the following steps: setting basic parameters of a model, determining water saturation under different depths according to a Van Genuchten model, applying the water saturation to expressions for sound field and electric field calculation, respectively introducing independent time iteration steps, iteratively calculating the numerical values of the sound field and the electric field, extending the sound field calculation result to the electric field time node, obtaining a calculation result, and verifying the calculation result. The application effectively reduces the calculation amount, improves the accuracy and integrity of the seismic-electric wave field calculation, and makes the simulation result closer to the actual physical process.

The invention relates to a mixed absorption boundary electromagnetic wave numerical simulation method, belongs to the technical field of computational electromagnetics, and solves the technical problem that a Mur absorption boundary condition cannot be directly used for a coordinate telescopic medium, and the simulation method comprises the following steps: establishing a mixed absorption boundary electromagnetic wave numerical calculation model; setting CPML (Convolution Complete Matching Layer) parameters; calculating electromagnetic field distribution in the model; calculating a parameter I A, a parameter II B and a parameter III C required by the mixed boundary; calculating the electric field of the boundary of the outermost layer of the CPML; calculating a magnetic field at the next moment; and a step of iteration. The Mur absorption boundary is seamlessly combined with the CPML, and an electromagnetic field in a coordinate telescoping medium is solved by using time domain finite difference FDTD. The method is used for mixed absorption boundary electromagnetic wave numerical simulation in the coordinate telescopic medium.

The invention relates to a method, a system and equipment for calculating an electric field around an ADSS optical cable, and a medium. The model can effectively calculate the electric field distribution around the optical cable by accurately modeling the geometrical shape and stress response of the power transmission line and combining the relationship between the charge density and the electric field. The electric field is solved through a finite element analysis method, a non-uniform division strategy is adopted, the calculation precision is guaranteed, and meanwhile the calculation cost is reduced. According to the equivalent charge method, the calculation process is simplified through virtual charge distribution, and high precision is maintained. The model solves the problems of complex electric field calculation and insufficient precision in the prior art, is widely applicable to electric field analysis and optical cable design of a power system, and provides effective support for safe operation of an ADSS optical cable.

The present invention discloses a method and system for measuring geometric parameters of hydraulic fractures, wherein the method for measuring geometric parameters of hydraulic fractures comprises the following steps: using a three-dimensional finite element method to establish a formation model containing hydraulic fractures, and longitudinally setting a multi-component induction logging coil system at a wellbore in the formation model containing hydraulic fractures to construct an induced electric field calculation model; calculating the measurement signal values ​​of the coil systems with different receiving directions in the multi-component induction logging coil system when measuring the geometric parameters of hydraulic fractures; determining the coil system sensitive to the geometric parameters of hydraulic fractures; using the multi-component induction logging coil system to measure the geometric parameters of the hydraulic fractures to be measured, and obtaining the measurement signal values ​​of each sensitive coil system when measuring the geometric parameters of the hydraulic fractures; and determining the size of the geometric parameters of the hydraulic fractures to be measured. The measurement results of the geometric parameters of the hydraulic fractures obtained by the present invention are of great significance to the design of the hydraulic fracture monitoring instrument and the calculation model of the fracture parameters.

This invention provides a method for optimizing the structure of lightning protection insulators based on surface electric field characteristics, comprising: S1. Modeling the target lightning protection insulator using Solidworks software, wherein the size ratio of the established target lightning protection insulator model to the actual target lightning protection insulator is 1:1; S2. Meshing the target lightning protection insulator model using a local refinement algorithm; S3. Determining the input parameters of the target lightning protection insulator, including rated voltage, metal electrode material, silicone shed material, and zinc oxide valve plate material; S4. Inputting the input parameters of the target lightning protection insulator into the finite element electric field calculation model to calculate indices, including the maximum electric field E along the surface of the insulation section. 1max The maximum electric field E on the surface of the disc electrode 2max The maximum electric field E on the surface of the spherical electrode 3max And determine the coefficient of electric field non-uniformity ξ along the surface of the insulation section. E And the ratio R1 of the maximum electric field value along the surface of the protective electrode and the insulation section; S5. Determine the comprehensive index β1; S6. Determine whether the comprehensive index β1 meets the set index threshold. If so, manufacture according to the predetermined size of the current target insulator. Otherwise, adjust the weight of each index in the comprehensive index β1 calculation model, and adjust the diameter of the spherical electrode, the diameter of the disc electrode, the distance of the protective gap and the extension length of the shed, and return to step S1.