Study on Short Circuit-current Distribution Characteristics of Overhead Transmission Line-GIL Hybrid Transmission System

doi:10.13296/j.1001-1609.hva.2021.09.005

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Study on Short Circuit-current Distribution Characteristics of Overhead Transmission Line-GIL Hybrid Transmission System

更新时间：2025-04-26

- Study on Short Circuit-current Distribution Characteristics of Overhead Transmission Line-GIL Hybrid Transmission System
- High VoltageApparatus Vol. 57, Issue 9, Pages: 34-42(2021)
- 作者机构：
  
  1. 南瑞集团公司(国网电力科学研究院)
  2. 国网电力科学研究院武汉南瑞有限责任公司
  3. 泉州亿兴电力工程建设有限公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2021.09.005
  CLC： TM75
- Published：2021
- 稿件说明：
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Study on Short Circuit-current Distribution Characteristics of Overhead Transmission Line-GIL Hybrid Transmission System[J]. High voltageapparatus, 2021, 57(9): 34-42.
DOI：

Study on Short Circuit-current Distribution Characteristics of Overhead Transmission Line-GIL Hybrid Transmission System[J]. High voltageapparatus, 2021, 57(9): 34-42. DOI： 10.13296/j.1001-1609.hva.2021.09.005.

摘要

由于采用管道密封绝缘输电

GIL系统受地形、天气和外界环境干扰较小

采用架空线—GIL混合系统输电会变得越来越普遍。当混合系统短路故障时

其电流分布将异于正常输电线路。为了明晰混合系统短路电流分流问题

文中首先建立了架空线—GIL混合输电系统模型

通过开关闭合操作模拟设置输电侧导线发生接地短路故障

GIL管廊内三相导线电流的增强倍数在1.01～2.08倍之间

且当发生三相接地短路故障时的电流增强倍数最高;设置GIL管廊内部导线发生接地短路故障

GIL管廊内三相导线电流的增强倍数在1.05～21.58倍之间

同样

当发生三相接地短路故障时的电流增强倍数最高

为GIL输电系统的安全性设计提供了技术支撑。

Abstract

GIL system is less disturbed by terrain

weather and external environment due to the adoption of pipe sealing insulation and transmission

therefore

the power transmission by the use of overhead line-GIL hybrid system will become more and more common. In case of short circuit fault of the hybrid system

its current distribution will be different from that of the normal transmission line. For clarifying short circuit current shunt of the hybrid system

the overhead line-GIL hybrid transmission system model is set up firstly in this paper. The current enhancement factor of three-phase conductor in GIL is between 1.01 and 2.08 through setting earth short circuit fault at the side of power transmission conductor by way of closing operation of the switch. The current enhancement factor in the case of threephase earthing short circuit fault is maximum. In case of setting the earthing short circuit fault of internal conductor of GIL

the current enhancement factor of three-phase conductor in the GIL is between 1.05 and 21.58. Similarly

the current enhancement factor in the case of three-phase earthing short circuit fault is maximum

which has provided technical support for the safe design of the GIL transmission system.

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Related Author

CHEN Zhuo

WU Yaxiong

WU Kecheng

Zhao Haixiang

MA Zhi-ying

ZHENG Qing-shui

ZHANG Guan-jun1

LIU Hai-ying3

Related Institution

Guangzhou Electric Power Design Institute Co., Ltd.

China Southern Power Grid Company Limited

北京电力设备总厂

西安交通大学电气工程学院陕西西安710049

School of Electrical Engineering,Xi’an Jiaotong University,Xi’an710049,China)A

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