發(fā)布時間：2018-01-28 07:14

  本文關鍵詞： 輸電線路 線路跳閘 耐雷水平 綜合防雷方案　出處：《華北電力大學》2014年碩士論文　論文類型：學位論文

【摘要】：輸電線路的雷害事故多引起跳閘,雷擊跳閘一直是困擾供電安全的一個難題,而隨著電網的快速建設和惡劣天氣的增多,雷害故障呈現出一些新的特點,雷擊造成的線路兩相閃絡、同塔雙回線路同時閃絡、同一輸電通道多回線路相繼跳閘等嚴重故障明顯增加,線路雷擊跳閘已經成為整個電網跳閘的主要原因,因此,如何有效防止雷擊故障的發(fā)生,對防雷技術進行綜合研究,盡量降低雷擊跳閘率,減少輸電線路的雷害事故成為電力系統(tǒng)安全穩(wěn)定運行的一項重要課題。本文主要研究了防雷技術相關知識、常規(guī)的防雷原則、防雷技術方案,進而分析線路防雷規(guī)律。根據北京地區(qū)地形地貌、雷擊故障統(tǒng)計,通過對典型老舊線路220kV門聶一二線路現狀分析,掌握線路耐雷水平和裝置運行情況,對線路防雷擊進行全面分析研究,提出新的綜合防雷方案。本文以理論指導實踐,注重理論與實踐的結合,并對現有技術提出改進,對下一步防雷工作有一定參考作用。
[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.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM863

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本文編號：1470139