用在线监测器的配电网故障定位法  

Power distribution network ground fault location algorithm using on-line detectors

作　　者：伊贵业[1] 杨学昌[1] 吴振升[1] 

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084

出　　处：《清华大学学报（自然科学版）》2000年第7期35-38,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金项目! ( 597770 1 7)

摘　　要：为解决分支辐射型的中性点不接地配电系统的故障定位问题 ,提出了用分支探测器在线监测故障的定位方法 ,并给出了探测器的具体研制方案。分支探测器由光电式零序电流互感器、微处理器控制电路和数字载波扩频通信装置构成。变电站主机的信号处理系统收集探测器的测量信息 ,根据网络结构和各分支点的零序电流大小进行故障分支的定位。实验证明探测器运行可靠 。An on line monitoring method is proposed for locating line to ground faults in ungrounded distribution networks with offset lines. The method is developed for on line detectors installed in the main branch of the distribution network. The detector includes an optical zero sequence current transducer, a microprocessor system and communication instrument for using the digital power line method. The information from the zero sequence current detector is collected by the signal processing instrumentation in the transformer substation to quickly locate the grounded fault. The residual current produced by the imbalance among the three phase sensors is analyzed by residual signal reduction processing. An artificial grounds fault test confirmed that the detector can accurately locate faults in automated distribution systems.

关 键 词：中性点不接地系统 在线监测 故障定位 配电线路 

分 类 号：TM711[电气工程—电力系统及自动化] TM726