短间隙空气流注放电数值模拟研究

发布时间：2018-02-14 13:11

本文关键词： 棒-板短空气间隙流注放电弱形式有限元　出处：《太原理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：近年来国家大力建设超高压输电线路,关乎输电线路安全运行的高电压绝缘技术显得至关重要。高压电器设备的绝缘也一直都是研究的难点和重点。在电力行业中,常采用空气作为绝缘介质。气体放电理论成因复杂,早期阶段流注放电是一个很好的切入点,越来越受到关注。随着计算机运算能力的迅速提升,采用数值仿真方法研究气体放电过程已逐渐成为热点。本文在分析了国内外关于流注放电仿真模型和方法的基础上,建立了一种基于流体力学的流注放电模型,采用加权余量法的伽辽金弱形式求解该模型并对仿真结果做出了分析及验证。主要工作如下： (1)了解了国内外流注放电数值仿真的研究现状及本论文的选题背景和意义。 (2)介绍了如何将气体放电理论应用到连续性方程从而建立基于流体力学的流注放电模型,并分析了流注放电过程中相关参数的物理意义。 (3)提出了一种流注放电仿真模型,引入加权余量法的伽辽金弱形式算法求解所建立的流注放电模型,并基于有限元软件完成了建模和仿真过程,得出并分析了流注放电过程中的微观参数及电场分布。 (4)研究了外加电压极性和棒头半径对于棒板10mm空气间隙流注放电的影响,并做了理论分析。
[Abstract]:In recent years, the construction of EHV transmission lines in our country is very important. The insulation of HV electrical equipment is always the difficulty and key point of the research. In the electric power industry, the insulation of high voltage electrical equipment is very important, and it is very important for the safe operation of EHV transmission lines. Air is often used as insulating medium. The cause of gas discharge theory is complicated, the flow discharge is a good breakthrough point in the early stage, and more and more attention is paid to it. With the rapid development of computer computing ability, Numerical simulation method has been used to study the gas discharge process. On the basis of analyzing the simulation models and methods of streamer discharge at home and abroad, a fluid discharge model based on fluid mechanics is established in this paper. The Galerkin weak form of weighted residual method is used to solve the model and the simulation results are analyzed and verified. The main tasks are as follows:. 1) the research status of numerical simulation of streamer discharge at home and abroad and the background and significance of this thesis are discussed. This paper introduces how to apply the theory of gas discharge to the continuity equation to establish a fluid discharge model based on fluid mechanics, and analyzes the physical significance of the related parameters in the process of flow discharge. A flow discharge simulation model is proposed. The Galerkin weak form algorithm based on weighted residual method is introduced to solve the flow discharge model, and the modeling and simulation process is completed based on the finite element software. The microcosmic parameters and electric field distribution in the process of streamer discharge are obtained and analyzed. (4) the effects of applied voltage polarity and rod head radius on flow discharge in 10mm air gap of rod plate are studied, and theoretical analysis is made.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM723

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