基于负序分量的含光伏电源配电网故障区段定位方法  

Fault Location Method for Distribution Network with Photovoltaic Power Based on Negative Sequence Component

作　　者：胡满琳 李楠 李一鸣 皮志勇 朱益 李振兴[1] HU Manlin;LI Nan;LI Yiming;PI Zhiyong;ZHU Yi;LI Zhenxing(College of Electrical Engineering and New Energy,Three Gorges University,Yichang 443002,China;State Grid Hubei Jingmen Electric Power Supply Company,Jingmen 448001,China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]国网湖北省电力有限公司荆门供电公司,湖北荆门448001

出　　处：《中国电力》2024年第5期188-199,共12页Electric Power

基　　金：国家自然科学基金资助项目(大规模电力外送通道重合闸所致重大风险分析与规避控制策略研究,52077120)。

摘　　要：针对光伏电源接入配电网导致故障电流无法正确反映故障区段的问题,分析含光伏电源配电网故障时三序分量,选择负序分量作为故障特征量;对于不对称故障场景提出负序重构方案;采用曼肯德尔(Mann-Kendall,MK)趋势检测寻求故障特征最明显的负序重构序列;利用负序重构电压幅值确定可疑故障区段,结合负序重构电流相位方向确定故障区段。在PSCAD/EMTDC仿真平台搭建含光伏电源的配电网模型。结果表明:提出的方法能够实现含光伏电源配电网在不同故障类型、故障位置下的故障区段准确定位,为含光伏电源配电网快速故障定位提供了理论依据。In order to solve the problem that the fault current can not correctly indicate the fault section due to the connection of photovoltaic power to the distribution network,the three-sequence component of the faulty distribution network with photovoltaic power generation is analyzed,and the negative sequence component is selected as the fault characteristic quantity.A negative sequence reconstruction scheme is proposed for the asymmetric fault scenario.The MK trend detection is used to search the negativesequence reconstruction sequence with the most obvious fault characteristics.The negative sequence reconstruction voltage amplitude is used to determine the suspicious fault section,and the fault section is finally determined by the phase direction of negative sequence reconstruction current.A distribution network model with photovoltaic power generation is established with the PSCAD/EMTDC simulation platform.The results show that the proposed method can accurately locate the fault section of the distribution network with photovoltaic power generation under different fault types and fault locations,and can provide a theoretical basis for the rapid fault location of the distribution network with photovoltaic power generation.

关 键 词：对称分量法 故障区段定位 负序重构 MK检测 光伏电源 

分 类 号：TM615[电气工程—电力系统及自动化]