期刊论文

Neutral Point Intelligent Resistance Grounding Method Based on Single-phase Grounding Fault Zone of Distribution Network

Li, Zhengyang(851182178@qq.com)

中文

电力系统自动化

1000-1026

2019

43

6

145-150 and 170

10.7500/AEPS20180808003

已申请国家发明专利

本校为第一且通讯机构

配电网经小电阻接地方式存在高阻死区,对人身安全、供电可靠性、电网安全皆有一定影响。为了解决小电阻接地方式存在的问题,提出了一种基于单相接地故障分区的配电网智能电阻接地方法。该方法根据电网中性点位移电压及故障线路电流变化将故障分区,在高阻故障区采用双增量启动,快速选线切除故障;在中、低阻故障区采用不同的延时处理,使瞬时性故障恢复,提高配电网的供电可靠性和人身及电网的安全性。开发的装置经试验证明,其具有5 000Ω的高阻识别处理能力,能使达65A电流幅值的瞬时性故障恢复,并能准确判断及切除永久性故障。相比小电阻接地方式,智能电阻接地能够有效提高人身安全、电网安全和供电...

The distribution network using the small resistance grounding method has a high resistance dead zone, which has certain impact on personal safety, power supply reliability and grid security. In order to solve the problem of small resistance grounding method, an intelligent resistance grounding method based on single-phase grounding fault zone is proposed. The method divides the faults according to the grid neutral point displacement voltage and fault line current change. In the high resistance fault zone, the double incremental start-up is adop...