电网技术2016，Vol.40Issue(10)：3250-3257,8.DOI:10.13335/j.1000-3673.pst.2016.10.045
全火焰条件下植被燃烧特征量对导线-板间隙击穿特性的影响
Influence of Vegetation Combustion Features on Breakdown Characteristics of Conductor-Plane Gap Under Full Flame Condition
摘要
Abstract
In recent years,frequent occurrence of forest fire in transmission line corridors bring a serious threat to safe and stable operation of power grid.Typical vegetations prone to cause line tripping were selected.The tests of combustion characteristics,AC and DC breakdown characteristics of conductor-plane gap under full flame condition were investigated.The combustion features,such as heat release rate,flame temperature,height and conductivity were extracted and the influence mechanism of combustion features on breakdown characteristics of gap under full flame condition was analyzed.Results show that,the effect of different types of vegetation flame on breakdown characteristics of gap is obviously different.Especially under fir branches flame,AC and DC positive polarity breakdown voltage of gap can be reduced to about 10％ and 6％ of that in the pure air gap,respectively.The breakdown voltage of gap has an obvious polarity effect,and breakdown voltage for DC positive polarity is smaller than that for DC negative polarity.Conductivity of vegetation flame is a main factor causing gap dielectric strength to decline,followed by heat release rate and flame height,and the temperature of flame has little effect.关键词
山火/输电线路/燃烧特征量/击穿特性Key words
forest fire/transmission line/combustion features/breakdown characteristics分类
信息技术与安全科学引用本文复制引用
黎鹏,黄道春,阮江军,魏晗,吴传平..全火焰条件下植被燃烧特征量对导线-板间隙击穿特性的影响[J].电网技术,2016,40(10):3250-3257,8.基金项目
国家自然科学基金面上项目(51677138) （51677138）
高等学校博士学科点专项科研基金(20120141120027) （20120141120027）
中央高校基本科研业务费专项资金(2015207020201).Project Supported by National Natural Science Foundation of China(51677138) and the Specialized Research Fund for the Doctoral Program of Higher Education of China(20120141120027) and the Fundamental Research Funds for the Central Universities(2015207020201). （2015207020201）
