Analysis of an EHVDC Transmission Line Fault Leading to Blocking Converter in ±800 kV Puer-Qiaoxiang EHVDC System

ZHANG Pengwang; LI Hao

doi:10.13296/j.1001-1609.hva.2015.04.035

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Analysis of an EHVDC Transmission Line Fault Leading to Blocking Converter in ±800 kV Puer-Qiaoxiang EHVDC System

更新时间：2025-04-26

- Analysis of an EHVDC Transmission Line Fault Leading to Blocking Converter in ±800 kV Puer-Qiaoxiang EHVDC System
- High VoltageApparatus Vol. 51, Issue 4, Pages: 194-199(2015)
- 作者机构：
  
  1. 中国南方电网超高压输电公司大理局
  2. 中国南方电网超高压输电公司昆明局
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2015.04.035
  CLC： TM75
- Published：2015
- 稿件说明：
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[1]张鹏望,李浩.±800kV普侨直流一起直流线路故障导致直流闭锁原因分析[J].高压电器,2015,51(04):194-199.

ZHANG Pengwang, LI Hao. Analysis of an EHVDC Transmission Line Fault Leading to Blocking Converter in ±800 kV Puer-Qiaoxiang EHVDC System[J]. High voltageapparatus, 2015, 51(4): 194-199.
[1]张鹏望,李浩.±800kV普侨直流一起直流线路故障导致直流闭锁原因分析[J].高压电器,2015,51(04):194-199. DOI： 10.13296/j.1001-1609.hva.2015.04.035.

ZHANG Pengwang, LI Hao. Analysis of an EHVDC Transmission Line Fault Leading to Blocking Converter in ±800 kV Puer-Qiaoxiang EHVDC System[J]. High voltageapparatus, 2015, 51(4): 194-199. DOI： 10.13296/j.1001-1609.hva.2015.04.035.

摘要

文中分析了普侨直流在单极金属回线模式运行时发生的一起直流线路故障导致直流闭锁的原因

指出故障的原因为中性母线上的避雷器被击穿从而导致中性母线差动保护与极差动保护动作

而且部分直流保护设计不完善

并给出了相应的直流保护优化措施。实践证明

这些措施有效的提高了直流输电系统运行的可靠性。

Abstract

A transmission line fault in its unipolar metallic return mode has happened

leading to blocking converter in ±800 k V Puer-Qiaoxiang UHVDC system. This paper analyzes the fault in detail

and points out that the breakdown arrester in the neutral bus is the reason that causes neutral bus differential protection and polar differential protection action. In addition

part of DC protection design is imperfect. The optimization measures for corresponding DC protection are given.Practice has proved that the proposed measures effectively improve the reliability of the HVDC system operation.

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