配电网自动调谐及故障选线的研究  

Petersen Coil Automatic Tuning and Earth Fault Indentification in a Compensated Distribution Network

作　　者：马洪江[1] 陈星[1] 曾祥君[1] 李泽文[1] 王媛媛[1] 

机构地区：[1]长沙理工大学电气与信息工程学院,湖南长沙410076

出　　处：《长沙理工大学学报（自然科学版）》2005年第2期48-51,共4页Journal of Changsha University of Science and Technology:Natural Science

基　　金：国家自然科学基金资助项目(50207001).

摘　　要：在现有的消弧线圈自动调整及故障选线方法的基础上,提出了采用注入信号法测量配电网对地参数(对地电阻和阻尼率)进行消弧线圈调谐及中性点接地阻抗柔性控制,探讨了一种通过改变配电网中性点接地阻抗参数、测量零序电流变化和进行故障选线的方法.产品已通过现场运行,并在全国推广应用,效果良好.Traditional methods for Petersen coil resonance adjustment and feeder earth fault identification in compensated network are introduced.All this methods hardly satisfy the requirement of distribution system automation.A new method for Petersen coil automation tuning is developed,which is based on measuring the system resonance frequency and parameters to the ground, and a new method for faulted feeder identification is also presented,which is based on measuring the zero sequence current variation caused by shut-cutting the neutral earthed resistance.The devices for Petersen-coil tuning and fault identification have been developed and applied in distribution networks throughout China for many years.

关 键 词：配电网 自动调谐 故障选线方法 消弧线圈 注入信号法 中性点接地 自动调整 柔性控制 接地阻抗 阻抗参数 现场运行 电流变化 推广应用 阻尼率 测量 电阻 零序 

分 类 号：TM727[电气工程—电力系统及自动化] TM475