Arrester Protection at Valve-side of Highest Potential Converter Transformer in ±800 kV UHVDC Project

ZHOU Xiao-qin1; GOU Rui-feng1; LU Jin-zhuang2; LI Bin-bin1; WANG Cong-gang1

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Arrester Protection at Valve-side of Highest Potential Converter Transformer in ±800 kV UHVDC Project

更新时间：2025-04-26

- Arrester Protection at Valve-side of Highest Potential Converter Transformer in ±800 kV UHVDC Project
- High VoltageApparatus Vol. 45, Issue 2, Pages: 1-3+6(2009)
- 作者机构：
  
  1. 西安高压电器研究所
  2. 南方电网技术研究中心
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM862
- Published：2009
- 稿件说明：
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[1]周晓琴,苟锐锋,吕金壮,李宾宾,王从钢.±800 kV特高压直流换流站最高端换流变阀侧避雷器保护研究[J].高压电器,2009,45(02):1-3+6.

ZHOU Xiao-qin1, GOU Rui-feng1, LU Jin-zhuang2, et al. Arrester Protection at Valve-side of Highest Potential Converter Transformer in ±800 kV UHVDC Project[J]. High voltageapparatus, 2009, 45(2): 1-3+6.
[1]周晓琴,苟锐锋,吕金壮,李宾宾,王从钢.±800 kV特高压直流换流站最高端换流变阀侧避雷器保护研究[J].高压电器,2009,45(02):1-3+6. DOI：

ZHOU Xiao-qin1, GOU Rui-feng1, LU Jin-zhuang2, et al. Arrester Protection at Valve-side of Highest Potential Converter Transformer in ±800 kV UHVDC Project[J]. High voltageapparatus, 2009, 45(2): 1-3+6. DOI：

摘要

±800 kV直流输电工程与常规±500 kV直流输电工程换流站的避雷器保护方案存在一些不同点

在±800 kV直流输电工程换流站增加避雷器以进一步限制换流站内关键点的过电压水平就是不同点之一

其中包括在最高电位换流变阀侧增加避雷器（A2）对高压阀侧设备进行保护。笔者针对±800 kV特高压直流实际工程

重点分析研究了安装A2避雷器的必要性。选取典型工况在换流站高压端换流变阀侧有避雷器直接保护和无避雷器直接保护的两种方案下计算换流站相关点的过电压水平。结果表明

高压端换流变阀侧加装A2避雷器可直接保护高压端换流变阀侧

有效降低阀侧设备的绝缘水平

从而降低特高压直流工程换流变压器、高压套管等设备的制造成本和难度

因此是非常直接而可靠的保护方案。

Abstract

The arrangement scheme of surge arresters for ±800 kV UHVDC transmission line converter station is different from the one for ±500 kV HVDC transmission line converter station.For example

additional arresters are adopted in ±800 kV UHVDC converter station to further limit over-voltage at several special locations

including an A2 arrester which is set on the highest potential converter transformer side to protect the equipment at valve-side.Focusing on Yunnan-Guangdong ±800 kV UHVDC project

this paper analyzes the necessity of A2 arrester.Typical fault cases with and without A2 arrester at the valve-side of the converter station are chosen to calculate the over-voltage at relevant positions

respectively.The results show that the scheme with A2 arrester can protect directly the valve-side of the converter transformer at highest potential

and reduces the insulation level of valve-side equipment effectively

which results in lower production cost and manufacture difficulty of UHVDC converter transformers

high voltage bushings

etc.

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