氧化锌非线性电阻片集肤效应的分析与探讨  

Analysis and Discussion on the Skin Effect of Zinc Oxide Nonlinear Resistor

作　　者：王巨丰[1] 胡习凯 韦念胜 李世民[1] 吴焰龙[1] 闫仁宝[1] 

机构地区：[1]广西大学电气工程学院,南宁530004

出　　处：《电瓷避雷器》2014年第3期88-95,共8页Insulators and Surge Arresters

摘　　要：氧化锌避雷器也叫金属氧化物避雷器(以下简称MOA),已广泛应用于现代电力系统的防雷保护中,虽然MOA在防雷保护方面具有许多优势,比如残压小,体积小,保护性能好以及吸收过电压能量大等优点,但也无法掩盖MOA故障率偏高的事实。虽然氧化锌电阻片的老化和受潮是MOA故障的主要原因,但仍有相当一部分MOA故障原因并不是很清楚。本文所研究的问题是分析氧化锌电阻片的集肤效应,进而探讨集肤效应是MOA的故障原因之一。首先,通过对雷电流进行傅立叶分解,证明雷电流通过氧化锌电阻片向大地泄放时存在集肤效应;然后,利用冲击电压发生器模拟雷电通过氧化锌电阻片时存在集肤效应,分别进行无间隙和带间隙模拟击穿实验,然后进行对比分析,进而探讨集肤效应也是MOA的故障原因之一。Zinc oxide lightning arrester is also called the metal oxide surge arrester （Hereinafter referred to as the MOA） ,which has been widely applied in lightning protection of modern power system, although MOA has many advantages in lightning protection, such as fewer residual voltage, small volume, good protection performances, and good overvohage energy absorbing and so on, but that also couldn＇t hide the fact of its high failure rate. Although aging and damp of zinc oxide resistor are the main causes of MOA fault, there are still a significant number of the MOA fault cause are not very clear. In this paper, the skin effect of zinc oxide resistor is studied in this paper, and then the fact that skin effect is one of the cause of the MOA failure is discussed. First, through the Fourier decomposition of lightning current, the skin effect is exist when the lightning Current discharge to the earth through zinc oxide resistor, then, the skin effect existed when the lightning current across the zinc oxide resistor is simulated by using the impulse voltage generator, the gapless and gap breakdown simulation test are respectively carried out, zinc oxide valve, and then contrastive analysis is carried out to discuss that the skin effect is also one of the failure causes of MOA.

关 键 词：氧化锌避雷器 无间隙和带间隙氧化锌电阻片 集肤效应 雷电 傅立叶分解 冲击实验 MOA的故障 

分 类 号：TM862[电气工程—高电压与绝缘技术]