火焰高度对输电线路间隙击穿特性的影响  

Study on the Influence of Flame Height on Gap Breakdown Characteristics of Transmission Lines

作　　者：陈孝明[1] 魏晗[2] 阮羚[1] 黄道春[2] 黄俊杰[1] 黎鹏[2] 熊宇[1] 阮江军[2] 张亚飞[2] 秦知航 

机构地区：[1]国网湖北省电力公司电力科学研究院,湖北武汉430077 [2]武汉大学电气工程学院,湖北武汉430072

出　　处：《中国电力》2015年第7期134-138,共5页Electric Power

摘　　要：山火可使架空输电线路间隙的绝缘强度显著下降,可能引发线路跳闸,导致线路出现停运的严重事故。近年来,山火频发给电网的安全稳定运行带来了巨大威胁。利用木垛火模拟山火,开展了火焰高度对模拟输电线路间隙击穿特性的影响研究。研究表明,火焰高度对间隙的击穿特性影响较大,火焰高度与击穿电压之间具有二次函数关系。研究成果可为输电线路防山火跳闸提供一定的指导。Forest fires can make the gap insulation strength of overhead transmission lines decrease significantly, which may cause transmission-line tripping and lead to serious power outage accidents. In recent years, frequent forest fires have brought a great threat to the safety of the power grid. In this paper, wood-chock fire is used to study the influence of flame height on the gap breakdown characteristics of transmission lines. The simulated results show that the flame height has a significant effect on the gap breakdown characteristics and the flame height and breakdown voltage have a relationship of quadratic function, which can provide an useful guidance for tripping prevention of transmission lines in case of forest fires.

关 键 词：输电线路 山火 击穿特性 火焰高度 线路跳闸 

分 类 号：TM75[电气工程—电力系统及自动化]