[1]方春华,陈 帆,李 景,等.10 kV一母多馈电缆线路弧光接地过电压特征分析[J].电瓷避雷器,2020,(02):141-147.[doi:10.16188/j.isa.1003-8337.2020.02.023]
 FANG Chunhua,CHEN Fan,LI Jing,et al.Analysis of Characteristics of Arc Grounding Overvoltage in 10 kV Multiple Feeders[J].,2020,(02):141-147.[doi:10.16188/j.isa.1003-8337.2020.02.023]
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10 kV一母多馈电缆线路弧光接地过电压特征分析()
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《电瓷避雷器》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2020年02期
页码:
141-147
栏目:
避雷器
出版日期:
2020-04-25

文章信息/Info

Title:
Analysis of Characteristics of Arc Grounding Overvoltage in 10 kV Multiple Feeders
作者:
方春华1 陈 帆1 李 景2 周雨秋1 方 雨1 张 威1
(1.三峡大学电气与新能源学院,湖北 宜昌443002; 2.国网安庆供电公司,安徽 安庆246000)
Author(s):
FANG Chunhua1 CHEN Fan1 LI Jing2 ZHOU Yuqiu1 FANG Yu1 ZHANG Wei1
(1.College of Electrical and New Energy, China Three Gorges University, Yichang 443002, China; 2.State Grid Anqing Electric Power Supply Company, Anqing 246000,China)
关键词:
一母多馈线 小电阻接地 弧光接地 过电压 接地方式
Keywords:
multiple feeders low resistance grounding arc ground overvoltage grounding method
DOI:
10.16188/j.isa.1003-8337.2020.02.023
摘要:
10 kV一母多馈线系统采用小电阻接地方式,当发生弧光接地故障时在故障馈线上会产生较高幅值的过电压,并经母线传递到相邻馈线,从而造成相邻馈线发生击穿跳闸事件。通过PSCAD建立一母多馈线模型,分析了弧光接地过电压对相邻馈线的影响,研究了断路器动作时过电压传递问题,分析了接地方式地对过电压传递的影响。得出了过电压从故障点传递到非故障馈线幅值不断衰减,断路器动作时间小于10 ms能够抑制过电压传递,经消弧线圈接地能够很大程度降低非故障馈线过电压的规律。
Abstract:
10 kV Multiple feeders system adopts a low resistance grounding method. When an arc ground fault occurs, an overvoltage with higher amplitude will be generated on the faulty feeder and transmitted to the adjacent feeder via the bus, which causes a breakdown trip accident. This paper has established the multiple feeders system on the PSCAD platform. By calculating the model, the influence of the arc grounding overvoltage on the adjacent lines is analyzed, the overvoltage transmission when the circuit breaker acts is also studied; and the effect of grounding method on overvoltage is analyzed. It's concluded that the amplitude of the overvoltage from the fault point to the non-faulty feeder is continuously attenuated. A circuit breaker with the operation time less than 10 ms can suppress the transmission of overvoltage in the circuit, and overvoltage of non-fault feeders can be greatly reduced by grounding through arc suppression coil.

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备注/Memo

备注/Memo:
收稿日期:2019-04-23作者简介:方春华(1980—),男,博士,副教授,硕导,主要从事高电压绝缘与在线监测技术方面的研究工作。
更新日期/Last Update: 2020-04-25