Characterization of Short-circuit Fault Voltage Distribution on Load Side of Cable-GIL Hybrid System

FAN Rongquan; ZENG Wenhui; ZOU Bin; LI Guo; XU Wenjie; CHEN Rongfei

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Characterization of Short-circuit Fault Voltage Distribution on Load Side of Cable-GIL Hybrid System

更新时间：2025-06-18

- Characterization of Short-circuit Fault Voltage Distribution on Load Side of Cable-GIL Hybrid System
- High Voltage Apparatus Pages: 1-11(2025)
- 作者机构：
  
  1.国网四川省电力公司经济技术研究院，成都　 610041
  2.国网四川省电力公司，成都　 610041
  3.西南交通大学电气工程学院，成都　 610031
- 作者简介：
- 基金信息：
  
  Science and Technology Project of State Grid Sichuan Electric Power Company(521996220002)
- DOI：
  CLC：
- Published：
- 稿件说明：
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FAN Rongquan, ZENG Wenhui, ZOU Bin, et al. Characterization of Short-circuit Fault Voltage Distribution on Load Side of Cable-GIL Hybrid System[J/OL]. High voltage apparatus, 2025, 1-11.
DOI：

FAN Rongquan, ZENG Wenhui, ZOU Bin, et al. Characterization of Short-circuit Fault Voltage Distribution on Load Side of Cable-GIL Hybrid System[J/OL]. High voltage apparatus, 2025, 1-11. DOI：

摘要

为满足四川地区清洁能源大规模外送的要求，现拟采用隧道输电方式新建一条电缆—GIL混合输电线路。隧道输电方式无法降低负载侧发生故障的风险，当混合输电系统负载侧发生短路故障时，其电压分布不同于正常输电线路。为明晰故障对混合输电线路电压分布的影响，利用EMTP-ATP建立了混合输电模型，在负载侧设置了不同类型的短路故障。当故障发生瞬间电缆护套会产生一个幅值极大的感应过电压，越接近故障位置其电压峰值越大，而随后的稳态峰值电压基本保持稳定；GIL导体的非故障相电压相比与正常运行时下降，故障相电压也呈现越靠近故障处波动越大的趋势。为混合输电系统的安全防护提供了参考。

Abstract

In order to meet the requirements of large-scale transmission of clean energy in Sichuan

a new cable-GIL hybrid transmission line is proposed to be built using tunnel transmission. The tunnel transmission method cannot reduce the risk of load-side faults

and when a short-circuit fault occurs on the load side of the hybrid transmission system

its voltage distribution is different from that of a normal transmission line. In order to clarify the effect of faults on the voltage distribution of the hybrid transmission line

a hybrid transmission model is established using EMTP-ATP

and different types of short-circuit faults are set up on the load side. When a fault occurs

the cable sheath generates an induced overvoltage with a great amplitude

and the closer to the fault location

the greater the peak voltage

while the subsequent steady-state peak voltage remains basically stable; the non-fault phase voltage of the GIL conductor decreases in comparison with the normal operation

and the fault phase voltage shows a trend of greater fluctuation the closer it is to the fault location. It provides a reference for the safety protection of hybrid transmission system.

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references

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