串联补偿输电线路稳态量电流差动保护改进算法

WANG Liping

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串联补偿输电线路稳态量电流差动保护改进算法

更新时间：2025-08-13

- 串联补偿输电线路稳态量电流差动保护改进算法
- Automation of Electric Power Systems Vol. 38, Issue 8, Pages: 98-103(2014)
- 作者机构：
  
  西南交通大学电气工程学院,四川省,成都市,610031
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2014
- 稿件说明：
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WANG Liping. [J]. Automation of electric power systems, 2014, 38(8): 98-103.
DOI：

WANG Liping. [J]. Automation of electric power systems, 2014, 38(8): 98-103. DOI：

摘要

稳态量电流差动保护是目前串联补偿(简称串补)输电线路的主要保护。文中归纳了国内外输电线路保护装置电流差动保护判据

从理论上分析了它们在串补输电线路上应用的灵敏性

以及系统阻抗和线路的串补度对保护灵敏性的影响。分析表明

稳态量电流差动保护会由于灵敏度不足而拒动。提出的稳态量电流差动保护改进算法能有效解决这个问题。PSCAD／EMTDC软件对四川电网500 kV串补线路的仿真计算验证了这一结论。

Abstract

Steady current differential protection is the currently most commonly used practice for series compensated transmission lines. The current differential protection criteria for transmission lines at home and abroad are summarized

and their sensitivity in series compensated transmission lines

as well as the influence of system impedance and the degree of series compensation on protection sensitivity are analyzed. Analysis shows that the steady state of current differential protection may refuse to move for lack of sensitivity. The improvement algorithm of current differential protection using steady current can effectively solve this problem. The simulation of 500 kV series compensated ultra-high voltage transmission lines in Sichuan grid with PSCAD/EMTDC software has verified this conclusion.

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