Effect of 110 kV main transformer neutral point discharge gap

被引：0

作者：

Li, Ai-Hua ^{[1
]}

Qing, Ao ^{[2
]}

机构：

[1] Xiangfan Electric Power Dispatching Center, Xiangfan 441002, China

[2] Hubei Electric Power Survey and Design Institute, Wuhan 430024, China

来源：

Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2010年 / 38卷 / 07期

关键词：

Electric insulation coordination - Electrolysis - II-VI semiconductors - Surge protection - Lightning protection - Lightning arresters - Timing circuits - Zinc oxide;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

In allusion to a trip accident of 110 kV transformer, some calculations of short-circuit are made, thunderbolt information system of Hubei power network is researched, and the configuration of transformer neutral point discharge gap and zinc oxide lightning arrester is looked up. After analyzing, this paper finds that the neutral point discharge gap was discharged when there was high lightning overvoltage on the neutral point caused by the lightning strike. But the arrester did not work. In this instance, discharge gap protected the insulation of main transformer neutral point. At the same time, this paper analyzes the acting qualification of neutral point discharge gap and zinc oxide lightning arrester, and it has proved that neutral point discharge gap tied in zinc oxide lightning arrester of transformer neutral point could be efficacious to protect the insulation of main transformer neutral point.

引用

页码：139 / 141

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