Overvoltage of UHVAC Bus at UHVDC Converter Station in Hierarchical Connection Mode

DONG Peng; HUANG Shaofeng; LI Zhenqiang; QIAO Xiaomin

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Overvoltage of UHVAC Bus at UHVDC Converter Station in Hierarchical Connection Mode

更新时间：2025-12-08

- Overvoltage of UHVAC Bus at UHVDC Converter Station in Hierarchical Connection Mode
- Vol. 42, Issue 12, Pages: 3909-3916(2016)
- 作者机构：
  
  1. 华北电力大学电气与电子工程学院
  2. 中国电力科学研究院
  3. 北京航天时代光电科技有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：31 December 2016，
  
  Published：2016
- 稿件说明：
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DONG Peng, HUANG Shaofeng, LI Zhenqiang, et al. Overvoltage of UHVAC Bus at UHVDC Converter Station in Hierarchical Connection Mode[J]. 2016, 42(12): 3909-3916.
DOI：

DONG Peng, HUANG Shaofeng, LI Zhenqiang, et al. Overvoltage of UHVAC Bus at UHVDC Converter Station in Hierarchical Connection Mode[J]. 2016, 42(12): 3909-3916. DOI：

摘要

针对±800 k V特高压直流系统首次采用逆变侧分层接入到1 000 k V特高压交流系统的需求

为了确定换流站中1 000 k V交流母线的过电压水平

分别在两种分层接入方案的多种严重工况下

对1 000 k V交流母线的工频暂时过电压和操作过电压水平进行了仿真计算。分析了最高过电压产生的原因

给出了最高过电压产生的工况以及过电压水平。方案1中泰州站相对地过电压标幺值最高为1.54

相间过电压标幺值最高为2.71;方案2中临沂站相对地过电压标幺值最高为1.57

相间过电压标幺值最高为2.97。提出了采用额定电压低的避雷器降低换流母线操作过电压的措施

为特高压换流站1 000 k V交流侧空气间隙距离的选取和绝缘配合提供依据。

Abstract

UHVDC hierarchical connection mode is a new structure in which the ±800 k V UHVDC system access to the 1 000 k V UHV AC system for the first time. In order to decide the overvoltage level of converter bus

we researched the temporary power frequency overvoltage and switching overvoltage of converter bus in two kinds of UHVDC hierarchical connection modes. The reason of the highest overvoltage is analyzed. The highest overvoltage and overvoltage conditions are presented. For Taizhou station in scheme1

the phase to ground overvoltage is 1.54

and the phase to phase overvoltage is 2.71. For Linyi station in scheme2

the phase to ground overvoltage is 1.57

and the phase to phase overvoltage is 2.97. Measures to reduce the converter bus overvoltage are put forward. This study provides a basis for the selection of the air gap distance and insulation of the 1 000 k V UHVDC converter station.

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DONG Peng

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Related Institution

State Key Laboratory of Power Grid Safety and Energy Conservation,China Electric Power Research Institute

School of Electrical & Electronic Engineering,North China Electric Power University

State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University

Electric Power Research Institute, State Grid Sichuan Electric Power Company

Nan’an Power Supply Company, State Grid Chongqing Electric Power Company

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