沿海地区输电线路覆冰雪规律与闪络预测研究  

Research on Ice-snow Covering Characteristics and Flashover Prediction of Coastal-region Transmission Lines

作　　者：李隆基[1] 文清丰 张弛[1] 李琪冉 刘勇 李学刚[3] LI Longji;WEN Qingfeng;ZHANG Chi;LI Qiran;LIU Yong;LI Xuegang(Electric Power Research Institute,State Grid Tianjin Electric Power Company,Tianjin 300384,China;School of Electrical and Information Engineering,Tianjin University,Tianjin 300072,China;State Grid Tianjin Electric Power Company,Tianjin 300010,China)

机构地区：[1]国网天津市电力公司电力科学研究院,天津300384 [2]天津大学电气自动化与信息工程学院,天津300072 [3]国网天津市电力公司,天津300010

出　　处：《电力系统及其自动化学报》2020年第5期93-98,共6页Proceedings of the CSU-EPSA

基　　金：国网天津市电力公司科技资助项目:沿海重污区输电线路覆湿雪闪络预测技术研究(KJ19-1-07)。

摘　　要：为研究沿海地区气象条件下输电线路覆冰雪规律,并对覆冰雪绝缘子闪络电压进行预测,分析了温度、湿度、风速对输电线路覆冰的影响规律。结合覆冰过程中过冷却液滴碰撞和冻结特性对覆冰厚度进行了理论计算,依据覆冰厚度对输电线路覆冰危害程度进行了等级划分。基于覆冰闪络与覆冰厚度、电弧发展路径和冰层剩余电阻之间的关系,建立了输电线路覆冰绝缘子临界闪络电压预测模型。最后,通过实例验证了预测系统的准确性和有效性,有助于进一步完善沿海地区输电线路覆冰雪预警系统。To study the ice-snow covering characteristics of transmission lines under the meteorological conditions of coastal regions and predict the flashover voltage of ice-covered insulators,the effects of temperature,humidity and wind speed on ice-covered transmission lines were analyzed in this paper. In addition,the icing thickness was theoretically calculated according to the collision and freezing characteristics of overcooled droplets in the icing process,and the icing hazard degree of transmission lines was classified according to the calculated icing thickness. Based on the relationship between the ice flashover voltage and the icing thickness,arc development path and ice residual resistance,a prediction model of critical flashover voltage of ice-covered insulators on the transmission lines was established. Finally,the accuracy and effectiveness of the prediction system were verified by an example,which is helpful in improving the ice-snow pre-warning system for coastal-region transmission lines.

关 键 词：沿海地区 输电线路 覆冰雪规律 冰闪电压 预测系统 

分 类 号：TM615[电气工程—电力系统及自动化]