Setting Method for Distance Protection of GIL Hybrid Overhead Lines

Hong Qiaozhang

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Setting Method for Distance Protection of GIL Hybrid Overhead Lines

更新时间：2026-02-13

- Setting Method for Distance Protection of GIL Hybrid Overhead Lines
- Vol. 44, Issue 4, Pages: 33-37(2021)
- 作者机构：
  
  南方电网能源发展研究院有限责任公司
- 作者简介：
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- Published：2021
- 稿件说明：
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Hong Qiaozhang. Setting Method for Distance Protection of GIL Hybrid Overhead Lines[J]. 2021, 44(4): 33-37.
DOI：

Hong Qiaozhang. Setting Method for Distance Protection of GIL Hybrid Overhead Lines[J]. 2021, 44(4): 33-37. DOI：

摘要

将GIL段串入架空线路后，线路阻抗特性会发生变化，对于阻抗参数敏感的距离保护，其保护范围会发生变化。为了使原有架空线路保护装置能够可靠保护混合线路，本文在理论分析的基础上，通过修改距离保护定值来维持保护装置保护范围，使得原架空线路保护装置在GIL-架空混合线路工况仍然适用。计算方法在PSCAD仿真模型中得到了验证。

Abstract

After stringing the GIL section into an overhead transmission line

the impedance characteristics of the line will change. For the distance protection sensitive to impedance parameters

the protection range will change. In order to make the original overhead line protection device reliably protect the mixed line

this paper proposes a method to maintain the protection scope of the protection device by modifying protection parameters of the distance protection

and the method is verified in the PSCAD simulation model.

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