Analysis and Suggestions on the Neutral Point Breakdown of 7 Main Transformers Due to Lightning Stroke

HU Jing-jing1; ZENG Li2; RAO Lin2

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Analysis and Suggestions on the Neutral Point Breakdown of 7 Main Transformers Due to Lightning Stroke

更新时间：2025-04-26

- Analysis and Suggestions on the Neutral Point Breakdown of 7 Main Transformers Due to Lightning Stroke
- High VoltageApparatus Issue 2, Pages: 143-145+148(2007)
- 作者机构：
  
  1. 重庆大学高电压与电工新技术教育部重点实验室
  2. 德阳电业局
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM407;TM864
- Published：2007
- 稿件说明：
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[1]胡晶晶,曾丽,饶林.雷击造成主变压器中性点击穿的原因分析及建议[J].高压电器,2007(02):143-145+148.

HU Jing-jing1, ZENG Li2, RAO Lin2. Analysis and Suggestions on the Neutral Point Breakdown of 7 Main Transformers Due to Lightning Stroke[J]. High voltageapparatus, 2007, (2): 143-145+148.
[1]胡晶晶,曾丽,饶林.雷击造成主变压器中性点击穿的原因分析及建议[J].高压电器,2007(02):143-145+148. DOI：

HU Jing-jing1, ZENG Li2, RAO Lin2. Analysis and Suggestions on the Neutral Point Breakdown of 7 Main Transformers Due to Lightning Stroke[J]. High voltageapparatus, 2007, (2): 143-145+148. DOI：

摘要

介绍了德阳绵竹地区因雷击而造成的7台110 kV主变中性点间隙击穿并使其中5台跳闸的情况。详细分析了保护动作行为

并指出了主变压器跳闸的原因。校验了中性点间隙与避雷器之间的配合

提出了增大间隙并延长间隙过流保护动作时限以躲开线路重合闸的方法

以减少停电时间并避免主变压器不必要的跳闸。

Abstract

In terms of the tripping cases resulted from the neutral point breakdowns of seven 110 kV transformers due to lightning stroke in Deyang city

this paper analyses the protection action in detail

checks the coordinations between the neutral gap and the surge arrester protection level

and suggests that the line re-energization can be dodged through prolonging the gap overcurrent protection time and increasing the gap clearance.

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