暂态方向法对配电网单相断线不接地故障的适应性分析  

Adaptability analysis on transient direction method to single phase line breakage with neither side conductor grounded fault in distribution network

作　　者：黄吕超 何清余 崔明涛 邢玉龙 胡源源 张航 常仲学 宋国兵[2] HUANG Lvchao;HE Qingyu;CUI Mingtao;XING Yulong;HU Yuanyuan;ZHANG Hang;CHANG Zhongxue;SONG Guobing(State Grid Information&Telecommunication Group Co.,Ltd.,Beijing 102211,China;School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]国网信息通信产业集团有限公司,北京102211 [2]西安交通大学电气工程学院,陕西西安710049

出　　处：《电工电能新技术》2023年第12期39-46,共8页Advanced Technology of Electrical Engineering and Energy

基　　金：国网信息通信产业集团有限公司能源“双碳”数智化关键技术研发专项(K102200002)。

摘　　要：暂态方向法广泛应用于单相接地故障检测,明确其对单相断线故障的适应性可指导单相断线故障检测方法的研究。本文首先推导了单相断线不接地故障下电源侧和负荷侧的零序电压幅值特征,分析了启动判据的适应性,在此基础上分析了暂态零序电压和零序电流的分布特征,给出了暂态方向法的适应性。理论分析和仿真验证表明零序电压启动判据存在死区,而零序电压满足启动判据的情况下暂态方向法可适用于单相断线不接地故障的检测。The transient direction method is widely used in single-phase grounding fault detection,and its adaptability to single-phase line breakage fault can guide the research on single-phase line breakage fault detection methods.Firstly,the amplitude characteristics of zero-sequence voltage of the power side and the load side under singlephase line breakage fault with neither side conductor grounded are derived,the adaptability of the starting criterion is analyzed,and the distribution characteristics of transient zero-sequence voltage and zero-sequence current are analyzed on this basis,and the adaptability of the transient direction method is given.Theoretical analysis and simulation verify that the starting criterion based on zero-sequence voltage exists a dead zone,and transient direction method can be applied to the detection of single-phase line breakage with neither side conductor grounded fault when the zero sequence voltage meets the starting criterion.

关 键 词：配电网 暂态方向 零序电气量 单相断线 适应性 

分 类 号：TM773[电气工程—电力系统及自动化]