基于空间电场的复合绝缘子非接触式覆冰监测方法  

Non-Contact Icing Monitoring Method for Composite Insulators Based on Spatial Electric Field

作　　者：张东东 刘锦[1,3] 黄宵宁 张志劲[2] ZHANG Dongdong;LIU Jin;HUANG Xiaoning;ZHANG Zhijin(School of Electric Power Engineering,Nanjing Institute of Technology,Nanjing 211167,China;State Key Laboratory of Transmission and Distribution Equipment and System Security and New Technology,Chongqing University,Chongqing 400044,China;State Grid Zhejiang Ninghai Power Supply Company,Ninghai,Zhejiang 315600,China)

机构地区：[1]南京工程学院电力工程学院,南京211167 [2]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆400044 [3]国网浙江宁海供电公司,浙江宁海315600

出　　处：《南方电网技术》2021年第4期99-106,共8页Southern Power System Technology

基　　金：江苏省自然科学基金资助项目(BK20181021);南京工程学院高层次引进人才科研启动基金(YKJ201819);江苏省配电网智能技术与装备协同创新中心开放基金(XTCX201902)。

摘　　要：绝缘子覆冰直接威胁到架空线路的安全稳定运行,而通过空间电场监测的方式可实现非接触式绝缘子覆冰状态识别以及冰闪预警。为此,仿真研究了110 kV复合绝缘子的空间电场分布特性,分析了不同覆冰形态及其放电程度对绝缘子空间电场的影响,最后探讨了基于空间电场的复合绝缘子非接触式覆冰监测方法。研究结果表明,雾凇、雨凇、放电3种情况下的复合绝缘子空间电场沿串分布有明显差异。随着覆冰程度的加重及放电的发展,绝缘子空间电场幅值呈增大趋势。通过定点监测了110 kV复合绝缘子横担d=0.3 m处、正对最末3片位置的空间电场信号,证明识别覆冰程度及电弧发展程度是可行的。本文研究结果可为架空线路绝缘子覆冰监测及冰闪预警提供参考。Insulator icing directly threatens the safe and stable operation of overhead lines,and through space electric field monitoring,non-contact insulator icing status recognition and ice flash warning are expected to be realized.For this reason,the spatial electric field distribution characteristics of 110 kV composite insulators are simulated,the effects of different icing patterns and their discharge levels on the spatial electric field of the insulators are analyzed,and a non-contact icing monitoring method for composite insulators based on the spatial electric field is discussed.Research results show that in three cases of rime,glaze,discharge,the spatial electric field of the composite insulator along with the string distribution are of obvious differences.When the degree of icing increases and electric discharge develops,the insulator spatial electric field amplitude increases.Spatial electric fiels signals are monitored at the cross-arm with d=0.3 m,and directly opposite to the last three pieces of the 110 kV composite insulator,which verifies that it is feasible to identify icing degree and arc development.The results of the study can be used as a reference for overhead line insulator icing monitoring and ice flash early warning.

关 键 词：有限元 覆冰 复合绝缘子 电场强度 局部电弧 

分 类 号：TM151[电气工程—电工理论与新技术] TM216[一般工业技术—材料科学与工程]