北京地区输电线路防雷技术研究

发布时间：2018-01-28 07:14

本文关键词： 输电线路线路跳闸耐雷水平综合防雷方案　出处：《华北电力大学》2014年硕士论文　论文类型：学位论文

【摘要】：输电线路的雷害事故多引起跳闸,雷击跳闸一直是困扰供电安全的一个难题,而随着电网的快速建设和恶劣天气的增多,雷害故障呈现出一些新的特点,雷击造成的线路两相闪络、同塔双回线路同时闪络、同一输电通道多回线路相继跳闸等严重故障明显增加,线路雷击跳闸已经成为整个电网跳闸的主要原因,因此,如何有效防止雷击故障的发生,对防雷技术进行综合研究,尽量降低雷击跳闸率,减少输电线路的雷害事故成为电力系统安全稳定运行的一项重要课题。本文主要研究了防雷技术相关知识、常规的防雷原则、防雷技术方案,进而分析线路防雷规律。根据北京地区地形地貌、雷击故障统计,通过对典型老旧线路220kV门聂一二线路现状分析,掌握线路耐雷水平和装置运行情况,对线路防雷击进行全面分析研究,提出新的综合防雷方案。本文以理论指导实践,注重理论与实践的结合,并对现有技术提出改进,对下一步防雷工作有一定参考作用。
[Abstract]:Lightning tripping is always a difficult problem for power supply safety caused by lightning damage accidents of transmission lines. With the rapid construction of power grid and the increase of bad weather, lightning damage fault presents some new characteristics. Due to lightning stroke, the two phase flashover of the line, the simultaneous flashover of the same tower double circuit line, the multiple circuit tripping of the same transmission channel and other serious faults have obviously increased. The line lightning tripping has become the main reason of the whole power grid tripping. Therefore, how to effectively prevent the occurrence of lightning strike fault, lightning protection technology for comprehensive research, as far as possible to reduce the lightning tripping rate. Reducing lightning accidents on transmission lines has become an important issue in the safe and stable operation of power system. This paper mainly studies the related knowledge of lightning protection technology, conventional lightning protection principles, lightning protection technical scheme. According to the topography and landform of Beijing area and the statistics of lightning strike fault, through the analysis of the current situation of 220 kV Mennie No. 1 line of old typical old line, the lightning resistance level and operation condition of the line are grasped. In this paper, a new comprehensive lightning protection scheme is put forward based on the comprehensive analysis and study of the lightning protection of the line. This paper uses the theory to guide the practice, pays attention to the combination of theory and practice, and puts forward some improvements to the existing technology. It can be used as a reference for the next step of lightning protection.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM863

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