中性点非有效接地系统单相接地故障处理新技术  

New technology of single-phase grounding fault processing in neutral non-effectively grounded systems

作　　者：刘健 张志华 张小庆 LIU Jian;ZHANG Zhihua;ZHANG Xiaoqing(State Grid Shaanxi Electric Power Research Institute,Xi’an 710100,China)

机构地区：[1]国网陕西省电力有限公司电力科学研究院,陕西西安710100

出　　处：《供用电》2022年第5期48-53,共6页Distribution & Utilization

基　　金：国家自然科学基金重点支持项目“城市智能配电网保护与自愈控制关键技术”(U1766208)。

摘　　要：为了更好地解决中性点非有效接地系统单相接地故障处理问题,在介绍新型的“故障相接地法”和“柔性接地法”2种电压消弧技术的基础上,详细论述了“消弧线圈+故障相接地+选线跳闸”“消弧线圈+故障相接地+选线跳闸+馈线自动化”“消弧线圈+柔性接地+选线跳闸”“消弧线圈+柔性接地+选线跳闸+馈线自动化”4种典型单相接地故障处理应用模式,分别阐述了它们的技术原理、实现方案和技术特点,并介绍了4种模式在国内外的应用进展情况。In order to improve single-phase grounding fault processing of neutral non-effective grounded system,based on the introduction of two voltage arc suppression technologies,such as fault phase grounding approach and flexible grounding approach,this paper discusses in detail four typical single-phase grounding fault treatment application modes which are arc suppression coil + fault phase grounding + line selection trip,arc suppression coil + fault phase grounding + line selection trip + feeder automation,arc suppression coil + flexible grounding + line selection trip and arc suppression coil + flexible grounding + line selection trip + feeder automation.expounds their technical principle,implementation scheme and technical characteristics respectively.The application of these four modes at home and abroad is also introduced.

关 键 词：中性点非有效接地 配电网 单相接地故障 消弧 选线 故障相接地 柔性接地 馈线自动化 

分 类 号：TM72[电气工程—电力系统及自动化]