CAJ | 학술논문

中国中压配电网以架空线为主，多为小电流系统，单相接地故障占到电网故障总数的80％以上，但中国配网自动化系统基本上没有小电流接地故障定位功能，使配网自动化系统在提高可靠性的作用上大打折扣。给出一种小电流接地故障区段定位新方法，在线路上配置广域相量测量固定测点，获取小电流电网单相接地故障特征信息。基于测点相邻矩阵区段起始测点标识向量和故障路径标识向量概念，提出确定故障区间边界节点算法。物理模拟实验和挂网测试表明：该故障分区分段定位方法能够在线求解小电流接地故障段边界节点，缩小线路维护巡视范围。确定故障区间边界节点算法还可用于确定故障区相关负荷开关，为线路维护和馈线自动化提供依据。
중국중압배전망이가공선위주，다위소전류계통，단상접지고장점도전망고장총수적80％이상，단중국배망자동화계통기본상몰유소전류접지고장정위공능，사배망자동화계통재제고가고성적작용상대타절구。급출일충소전류접지고장구단정위신방법，재선로상배치엄역상량측량고정측점，획취소전류전망단상접지고장특정신식。기우측점상린구진구단기시측점표식향량화고장로경표식향량개념，제출학정고장구간변계절점산법。물리모의실험화괘망측시표명：해고장분구분단정위방법능구재선구해소전류접지고장단변계절점，축소선로유호순시범위。학정고장구간변계절점산법환가용우학정고장구상관부하개관，위선로유호화궤선자동화제공의거。
Medium voltage distributions in China use overhead line mainly, and most of them are small current neutral grounding system, single-phase-to-earth faults account for over 80% of the total fault, but most of our country＇s distribution automation systems do not have the function of locating the small-current-to-earth faults, so that the distribution automation system＇s efficiency in improving the reliability of power-up has been reduced drastically. The new method of locating the small-current-to-earth faults was studied. First of all a lot of measurement nodes must be fixed on the line to get the feature information of small-current-to-earth fault. And then the algorithm to find fault area boundary nodes （AFFABN） was put forward based on the matrix of adjacent point, the vector of section-starting-point identification and the logo vector of fault path. The physical simulation and practical tests show that the theory of area ＆ section location can locate the fault to a section of the line, to narrow the range of lines＇ maintenance. The AFFABN can also be used to determine the related load switches in a fault zone, to provide information for the line-maintenance and feeder automation.