粤东地区500kV线路污闪原因分析及防治对策  

Cause Analysis and Prevention Countermeasures for Pollution Flashover of 500 kV Line in Eastern Guangdong Power Grid

作　　者：黄振 汪政 彭向阳 范亚洲 巢亚锋 王锐 吴吉 HUANG Zhen;WANG Zheng;PENG Xiangyang;FAN Yazhou;CHAO Yafeng;WANG Rui;WU Ji(Guangdong Provincial Key Laboratory of Electric Power Equipment Reliability,Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou,Guangdong 510080,China;Electric Power Research Institute of State Grid Hunan Electric Power Co.,Ltd.,Changsha,Hunan 410007,China)

机构地区：[1]广东省电力装备可靠性企业重点实验室,广东电网有限责任公司电力科学研究院,广东广州510080 [2]国网湖南省电力有限公司电力科学研究院,湖南长沙410007

出　　处：《广东电力》2023年第4期49-56,共8页Guangdong Electric Power

基　　金：中国南方电网有限责任公司科技项目(GDKJXM20200403、GDKJQQ20161197)。

摘　　要：2019年11月13—24日,广东省粤东地区某4回500 kV输电线路发生7次污闪跳闸,终止了广东地区连续13年零污闪的纪录。针对此污闪跳闸事故原因进行了调查分析,总结此次粤东地区污闪的特点,指出此次污闪属于典型的局部区域性污闪。通过分析污闪绝缘子污秽度测试数据、离子成分,发现本次污闪的主要原因是污染源变化导致A类污秽大量沉积,以及海风引起的B类污秽快速积污。进一步分析不同污秽类型引起的污闪发展特点,指出常规的污秽清扫措施对于B类(海洋盐雾)污秽的清扫效果有限。最后针对不同污秽类型提出了污闪防治对策。From November 13 to 24 in 2019,seven pollution flashover trips of four 500 kV transmission lines in eastern Guangdong regions happened,which suspended the record of zero pollution flashover for 13 consecutive years in Guangdong province.In view of the accident,this paper investigates and analyzes the reasons and summarizes the characteristics of the pollution flashover in eastern Guangdong regions.It points out that this pollution flashover belongs to a kind of typical local regional pollution flashover.According to the analysis of insulator string pollution grade and ion component,it is found that the two main reasons of this pollution flashover are the change of pollution source leading to a large amount of deposition of class A pollution,the rapid accumulation of class B pollution caused by sea breeze.Furthermore,it analyzes the development characteristics of pollution flashover caused by different pollution types.It points out that effect of present cleaning measures is limited for class B pollution.Finally,the paper proposes the countermeasures for preventing different pollution types.

关 键 词：输电线路 污秽闪络 污秽成分 海洋盐类污秽 防污闪对策 

分 类 号：TM752.5[电气工程—电力系统及自动化]