机构地区: 北京信息科技大学自动化学院
出 处: 《北京信息科技大学学报(自然科学版)》 2017年第4期45-48,共4页
摘 要: 现阶段我国配电网大多采用小电流接地系统。针对中性点不接地系统单相接地故障定位问题,首先进行原理分析,找出故障时线路上各点的零序电流相位特征。基于零序电流相位对应关系,结合电流检测点和故障区段的区段-节点关联矩阵,进行矩阵操作,并给出了区段定位判据,最终实现了中性点不接地系统的在线区段故障定位。仿真实验证明了该方法的有效性。 Most of the distribution networks in China apply small current ground system at present.To solve the problem of fault location,the principle of single-phase-to-ground fault in neutral point ungrounded system is analyzed,and the characteristics of the zero sequence on the line are given. Based on zero sequence current phase relationship,combined with the section-node relevant matrix between current detection point and fault section,using matrix operation,the section fault location is finally realized. Simulation results show the effectiveness of the proposed method.