特高压直流单极大地回线运行方式下分流分析及其对策

ZENG Qingke

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特高压直流单极大地回线运行方式下分流分析及其对策

更新时间：2025-08-13

- 特高压直流单极大地回线运行方式下分流分析及其对策
- Automation of Electric Power Systems Vol. 38, Issue 22, Pages: 123-127(2014)
- 作者机构：
  
  国家电网公司运行分公司上海管理处,上海市,201413
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2014
- 稿件说明：
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ZENG Qingke. [J]. Automation of electric power systems, 2014, 38(22): 123-127.
DOI：

ZENG Qingke. [J]. Automation of electric power systems, 2014, 38(22): 123-127. DOI：

摘要

通过对向家坝—上海±800 kV特高压直流输电工程单极大地回线运行时出现分流现象的分析

得出分流的原因如下:极热备用或极闭锁时因控制逻辑合上旁路开关

导致运行极中性母线与停运极设备形成电流通路。探讨了分流的影响

提出通过运行操作、更改顺序控制或设计分流保护消除分流的措施

有利于提高特高压直流的可靠性。分析结果可为特高压直流工程设计、运行维护提供参考。

Abstract

The spill current is generated when Xiangjiaba-Shanghai ±800 kV ultra-high voltage direct current (UHVDC) transmission system is in monopole-ground return operation mode. According to analysis

the cause is the passage of current is generated between the neutral bus of de-blocking pole and equipment of blocking pole through by-pass switch closing by control logic in the state of hot standby or blocking of poles. The effects of spill current are discussed. In order to eliminate the spill current

such countermeasures are put forward as operating

modifying sequence control or designing spill current longitudinal differential protection

all being beneficial to improving the reliability of UHVDC project. The results can provide reference for UHVDC system design

operation and maintenance．

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