多重雷击下ZnO避雷器热击穿机理研究  

Thermal Breakdown Mechanism of ZnO Arrester Under Multiple Lightning Strikes

作　　者：毕洁廷 BI Jieting(Jiangsu Vocational College of Electronics and Information,Huai'an 223003 China;School of Electrical Engineer,Guanxi University,Nanning 530004,China)

机构地区：[1]江苏电子信息职业学院,江苏淮安223003 [2]广西大学电气工程学院,南宁530004

出　　处：《电瓷避雷器》2022年第4期162-168,共7页Insulators and Surge Arresters

摘　　要：全国的平均雷击事故率超过50%,在南方地区更是高达70%。造成雷害事故多发的一个重要原因是由ZnO避雷器的热击穿造成的。自然界中75%的雷击过程具有多重性,在多重雷击作用下,ZnO避雷器阀片会持续的流过雷电流和工频短路电流,避雷器阀片柱的温度升高的极快,时间是毫秒级的。本研究将聚焦多重雷击下ZnO避雷器的热击穿问题,通过FLUENT仿真,计算出ZnO避雷器在典型多重雷击作用下发生热击穿时的温度变化过程,并给出解决问题的方向。The average lightning accident rate in China is more than 50%,and it is as high as 70%in southern China.An important reason for the frequent occurrence of lightning accidents is the thermal breakdown of ZnO arrester.In nature,75%of lightning stroke processes have multiple characteristics.Under the action of multiple lightning strikes,the ZnO arrester valve plates will continuously flow through the lightning current and power frequency short-circuit current,and the temperature of the arrester valve column will rise very quickly,and the time is milliseconds.The author will focus on the thermal breakdown problem of ZnO arrester under multiple lightning strikes.Through FLUENT simulation,the temperature change process of ZnO arrester under thermal breakdown under typical multiple lightning strikes is calculated,and the direction to solve the problem is given.

关 键 词：多重雷击 ZNO避雷器 热击穿 FLUENT仿真 

分 类 号：TM862[电气工程—高电压与绝缘技术]