Analysis of Oscillating Over-voltage Breakdown Fault of 35 kV XLPE Power Cable with Countermeasures

ZHAO Xueqian; REN Zhigang; GUO Xinyu; QI Weiqiang; DUAN Dapeng; WANG Qian; ZHANG Chen

doi:10.13296/j.1001-1609.hva.2015.05.030

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Analysis of Oscillating Over-voltage Breakdown Fault of 35 kV XLPE Power Cable with Countermeasures

更新时间：2025-04-26

- Analysis of Oscillating Over-voltage Breakdown Fault of 35 kV XLPE Power Cable with Countermeasures
- High VoltageApparatus Vol. 51, Issue 5, Pages: 162-168(2015)
- 作者机构：
  
  国网北京电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2015.05.030
  CLC： TM75
- Published：2015
- 稿件说明：
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[1]赵雪骞,任志刚,郭鑫宇,齐伟强,段大鹏,王谦,张琛.35kV交联电缆振荡过电压击穿故障分析及抑制措施[J].高压电器,2015,51(05):162-168.

ZHAO Xueqian, REN Zhigang, GUO Xinyu, et al. Analysis of Oscillating Over-voltage Breakdown Fault of 35 kV XLPE Power Cable with Countermeasures[J]. High voltageapparatus, 2015, 51(5): 162-168.
[1]赵雪骞,任志刚,郭鑫宇,齐伟强,段大鹏,王谦,张琛.35kV交联电缆振荡过电压击穿故障分析及抑制措施[J].高压电器,2015,51(05):162-168. DOI： 10.13296/j.1001-1609.hva.2015.05.030.

ZHAO Xueqian, REN Zhigang, GUO Xinyu, et al. Analysis of Oscillating Over-voltage Breakdown Fault of 35 kV XLPE Power Cable with Countermeasures[J]. High voltageapparatus, 2015, 51(5): 162-168. DOI： 10.13296/j.1001-1609.hva.2015.05.030.

摘要

近年来

北京电网出现过多起交联电缆振荡过电压击穿的事故

对电网安全造成了极大的威胁。文中深入研究了交联电缆振荡过电压击穿事故的原因

以及事故发生发展的过程

进一步认识了振荡过电压对电力设备的影响。笔者以某110 kV变电站35 kV电缆击穿故障为例

首先给出系统接线及事故概况

然后通过电缆中间接头解体检查与对故障录波数据的深入分析

指出故障原因是由于吊车碰架空导线造成瞬时单相接地

引起了局部35 kV系统的低频振荡

产生振荡过电压

造成电缆相间绝缘击穿

发生相间短路故障。最后

提出了相应的技术防范抑制措施与下一步研究工作的建议。

Abstract

In recent years

several breakdown failures of XLPE power cable have happened in Beijing power grid

which have threatened the power grid security. In this paper

the cause of the oscillating over-voltage breakdown failure and the accident process are analyzed to further understand the impact of the oscillating over-voltage on electric power equipment. Taking the breakdown fault of 35 kV power cable of a transformer substation for example

the main-line diagrams of the grid and the fault description are given

disassembly inspection of the cable middle joint is conducted

and the fault recorder data are analyzed. Conclusion is drawn that the breakdown fault is caused by transient single-phase grounding due to the touch of crane and overhead wires

which activates low frequency oscillation of local 35 kV system to generate oscillating overvoltage. Moreover

corresponding countermeasures are suggested.

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