输电线路走廊典型植被火焰绝缘特性测量与分析

陈孝明; 黎  鹏; 阮  羚; 黄道春; 黄俊杰; 魏  晗; 熊  宇; 阮江军; 龙明洋; 秦知航

陈孝明,黎鹏,阮羚,黄道春,黄俊杰,魏晗,熊宇,阮江军,龙明洋,秦知航.输电线路走廊典型植被火焰绝缘特性测量与分析[J].电测与仪表,2015,52(20):.
Chen Xiaoming,Li Peng,Ruan Ling,Huang Daochun,Huang Junjie,Wei Han,Xiong Yu,Ruan Jiangjun,Long Mingyang,Qin Zhihang.Insulation characteristics measurement and analysis of the typical vegetations in the corridor of the transmission lines[J].Electrical Measurement & Instrumentation,2015,52(20):.

输电线路走廊典型植被火焰绝缘特性测量与分析

Insulation characteristics measurement and analysis of the typical vegetations in the corridor of the transmission lines

DOI：

中文关键词: 输电线路山火植被绝缘电阻测量绝缘特性

英文关键词:transmission line, wildfires, vegetation, insulation resistance measurement, insulating properties

基金项目:国网湖北省电力公司科技项目

作者中文名	作者英文名	单位
陈孝明	Chen Xiaoming	国网湖北省电力公司电力科学研究院
黎鹏	Li Peng	武汉大学电气工程学院
阮羚	Ruan Ling	国网湖北省电力公司电力科学研究院
黄道春	Huang Daochun	武汉大学电气工程学院
黄俊杰	Huang Junjie	国网湖北省电力公司电力科学研究院
魏晗	Wei Han	武汉大学电气工程学院
熊宇	Xiong Yu	国网湖北省电力公司电力科学研究院
阮江军	Ruan Jiangjun	武汉大学电气工程学院
龙明洋	Long Mingyang	武汉大学电气工程学院
秦知航	Qin Zhihang	武汉大学电气工程学院

摘要点击次数: 2101

中文摘要:

山火条件下输电线路间隙的绝缘强度大幅下降，导致线路跳闸事故频发，给电网的安全稳定运行带来了严重影响。为分析山火条件下线路间隙绝缘强度下降原因，本文选取了输电线路走廊易引发线路跳闸的3种典型植被，对其火焰的绝缘特性进行了试验测量，并分析了植被火焰绝缘强度的影响机制；研究结果表明，在植被燃烧强度较大时，3种植被的火焰电阻率均较小，其中，杉树枝的最小，为3 kΩ?m，杉树干的最大，也达到30 kΩ?m，远低于纯空气间隙的绝缘强度；火焰绝缘强度随着火焰高度的增加而减小，随着火焰高度的降低而增大；植被火焰的绝缘特性与火焰高度、温度、烟尘浓度、灰分含量等因素有关，而当火焰温度较低时，火焰高度与燃烧强度对植被火焰的绝缘特性影响较大。因此，控制输电线路走廊的植被高度和密度可以从根本上减少山火导致线路跳闸事故的发生。

英文摘要:

The dielectric strength of the transmission lines gap has a significant decline under the wildfire, then leading to the frequent lines’ tripping accidents, which has a serious effect on the safe and stable operation of the grid. To analyze the decline cause of the transmission lines gap’s dielectric strength, three kinds of typical vegetations which can easily make the line tripping were selected in this paper; the dielectric strength of the vegetations flame were measured, and the influence mechanism of the vegetation flame’s dielectric strength had been analyzed. The results show that, the resistivity of the three vegetations flame is small under the large burning intensity. Among them, fir branch is minimum, for 3 kΩ?m, and fir body is largest, reached to 30 kΩ?m, the dielectric strength of which are lower than pure air gap. The dielectric strength of flame decreases with the increase of flame height and increases with the reduction of flame height. The insulating properties of vegetations flame are related with the flame height, temperature, smoke concentration, ash content and other factors, while the flame height and burning intensity have a greater impact on the insulation characteristics of vegetations flame when the temperature is lower. Hence, controlling the height and density of vegetations in the transmission line corridor can reduce the accidents of line tripping under wildfire radically.

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