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A SIMULATION METHOD BASED ON CORONA DISCHARGE SPACE POTENTIAL DISTRIBUTION

A technology of corona discharge and simulation method, which is applied in the fields of electrical digital data processing, instrumentation, design optimization/simulation, etc., and can solve problems affecting particle distribution and inability to accurately describe the corona discharge process, etc.

Active Publication Date: 2019-09-10
榆林市长江送变电工程有限责任公司
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  • Application Information

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Problems solved by technology

However, the process of corona discharge is a process of fast movement and collision of particles, which will cause gas flow to form a corona wind, which will affect the distribution of particles during the discharge process. Obviously, the Poisson equation and the particle continuity equation cannot be used accurately. Characterize the corona discharge process

Method used

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  • A SIMULATION METHOD BASED ON CORONA DISCHARGE SPACE POTENTIAL DISTRIBUTION
  • A SIMULATION METHOD BASED ON CORONA DISCHARGE SPACE POTENTIAL DISTRIBUTION
  • A SIMULATION METHOD BASED ON CORONA DISCHARGE SPACE POTENTIAL DISTRIBUTION

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Embodiment Construction

[0054] A simulation method based on corona discharge space potential distribution of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0055] A kind of simulation method based on corona discharge space potential distribution of the present invention, the steps that comprise include:

[0056] 1) Establish space potential governing equation

[0057] Since the electrons and positive and negative ions generated during the corona discharge change the space potential distribution in the experimental device, the electric field distribution in the experimental space is simulated by three equations (1)-(3):

[0058]

[0059]

[0060]

[0061] in, is the electrostatic displacement, is the electric field strength, φ is the electric potential, ε 0 is the gas permittivity, N e , N p , N n are the densities of electrons, cations, and anions, respectively. Substituting formula (2) and formula (3) ...

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Abstract

The invention is a simulation method based on potential distribution of corona discharge space. Based on Poisson equation and particle continuity equation, the simulation model adds the Navier-stokes equation which can describe the mobility of particle. The reason is that corona discharge is a process of particle movement and collision, the rapid movement of particle can cause the gas flow in discharge space and can influence the potential distribution in space. Coupling the Navier stokes equation which can describe the mobility of particle with Poisson equation and particle continuity equation, the method gets the potential contribution on the surface of sample through adjusting the parameter of simulation model, then, comparing the potential contribution with the measurement result of potential on the surface of sample to verify the effectiveness of the model. The method can calculate the potential distribution of discharge space rapidly which comprises potential distribution on the surface of sample. The method provides significant theoretical support for studying corona discharge mechanism, microscopic discharge process and simulating the effect of polarization of material.

Description

technical field [0001] The invention belongs to the field of space potential calculation, in particular to a simulation method based on corona discharge space potential distribution. Background technique [0002] The corona discharge phenomenon widely exists in the power system. Insulation defects in the manufacture and operation of power equipment will cause corona discharge under DC high voltage. At the same time, there are a large number of corona discharge phenomena near the wires of high-voltage transmission lines and near sharp objects under the thundercloud electrostatic field. Corona discharge will produce a large amount of space charge drift and accumulation when a continuous DC voltage is applied, mainly manifested as a large amount of accumulation of single polar ions in its migration region. According to the gas discharge theory, the distribution and direction of movement of this space charge may affect the insulation performance of the air gap and the charge ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 张嘉伟高凤凯刘芮彤尹超范维杨滢旋杨璐羽
Owner 榆林市长江送变电工程有限责任公司
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