摘要
分析了绝缘子表层积污与湿沉降所产生的泄漏电流的差异。通过监测到的数据确认,在水蒸气非饱和状态下(RH<100%),湿沉降仍然能使清洁绝缘子出现沿面爬电。泄漏电流变化率Ki=ΔIΔRH≤0是湿沉降侵入或散去的主要特征,绝对值显示湿沉降的严重程度,连续爬电时RH^I曲线会出现折线特征。沿海化工产业区湿沉降对外绝缘的影响占主要地位,是本地区盐密值低而污秽等级高的主要原因。
The difference of the leakage current generated by the wet deposition and contamination on the insulator surface are analyzed.It is verified that the creepage along surface of clean insulator is still caused by wet deposition in the unsaturated state of water vapor （RH〈100%） according to the monitoring data. The change ratio of leakage current Ki =△I/△RH ≤〈0 is an important feature of invasion or dispersion of wet deposition, the absolute value shows the severity of the wet deposition, the polyline features of RH-I curve are displayed RH-I are displayed in the continuous ceepage. The major cause of the low ESDD and high pollution level in this coastal chemical industry zone is the wet deposition, which is the major impact on external insulation in this area.
出处
《电瓷避雷器》
CAS
北大核心
2012年第5期12-17,共6页
Insulators and Surge Arresters
关键词
湿沉降
相对湿度
泄漏电流变化率
RH^I曲线
wet precipitation
relative humidity
change rate of leakage current
RH-I curve
