新型配电网故障检测与定位技术研究  

Study of Fault Detection and Location Technology for New-type Distribution Networks

作　　者：张国清 马波 王舜彪 舒来 刘德平 唐锋 ZHANG Guoqing;MA Bo;WANG Shunbiao;SHU Lai;LIU Deping;TANG Feng(Zhilian Xinneng Power Technology Co.,Ltd.,Wuhan 430000,China)

机构地区：[1]智联新能电力科技有限公司,湖北武汉430000

出　　处：《电工技术》2023年第18期123-127,共5页Electric Engineering

摘　　要：随着新型配电网的快速发展,大量分布式能源接入电网,配网供电形式由单电源变为多点供电,故障特征发生了巨大变化,对故障检测与定位技术提出了更高的要求。结合新型配电网结构特点,分析了DG从不同位置接入对故障检测带来的影响,结合中性点不接地系统的故障特征,分析了DG接入对零序电流的影响,并给出一种利用零序电流进行故障选线的方法。在传统行波定位方法的基础上,结合电压分布特性,完成定位区间优化,实现故障点精准研判。With the rapid development of new-type distribution networks and the integration of extensive distributed energy sources into power grid,the uni-power-source supply mode has evolved into multi-point power supply mode.The fault characteristics have thus changed significantly,posing higher requirements for fault detection and location technology.Combined structural characteristics of new-type distribution networks with fault characteristics of systems of non-grounding neutral point,the influences of DG connections at different locations on fault detection and zero-sequence current are analyzed.On the basis of traditional traveling wave positioning methods,combined with voltage distribution characteristics,optimization of positioning interval is performed to achieve accurate fault point analysis.

关 键 词：新型配电网 分布式电源 零序电流 电压分布特性 

分 类 号：TM732[电气工程—电力系统及自动化]