基于故障测距的单相自动重合闸永久故障电压自适应补偿判据  

AN ADAPTIVE VOLTAGE COMPENSATION CRITERION FOR PERMANENT FAULTIN THE SINGLE PHASE AUTOMATIC RE-CLOSING BASED ON FAULT LOCATION

作　　者：索南加乐[1] 刘辉[1] 吴亚萍[1] 毛鹏[2] 杜肖功[2] 

机构地区：[1]西安交通大学电气工程学院,陕西西安710049 [2]东方电子信息产业股份有限公司,山东烟台264001

出　　处：《中国电机工程学报》2004年第4期80-84,共5页Proceedings of the CSEE

摘　　要：该文提出一种基于故障测距的单相自动重合闸永久故障电压自适应补偿判据。该判据以故障点瞬时故障电压理论值为定值,由故障测距结果求出故障点实际电压,当故障点实际电压小于定值时为永久性故障,反之为瞬时性故障;考虑了由过渡电阻引起的故障测距误差对该判据的影响,给出了一种在高阻状况下测距不可靠时的解决方法。讨论了当线路侧无PT时,通过线路CT获取判据所需线路电压的原理。仿真结果表明:该判据可以准确地区分永久性和瞬时性故障,适用于110kV-220kV线路和不带并联电抗器的330kV-500kV线路。A novel approach of distinguishing between temporary and permanent fault in single pole autoreclosing based on fault location is proposed. This criterion uses the fault location result to get the fault point voltage and take the fault point voltage in theory as the setting value to distinguish the “permanent” fault from “temporary” fault. When the fault voltage is less than the setting value, the fault is permanent. Otherwise, a temporary fault is proved. Also resolutions have been discussed in high impedance and how to get the line-side voltage when no line-side voltage transformers have been installed. A lot of simulations show that it can identify the “temporary” and “permanent” faults correctly and be easily applied in a practical system such as 110kV^220kV transmission lines as well as 330kV^500kV transmission lines without shunt reactors.

关 键 词：电力系统 故障测距 单相自动重合闸 电压自适应补偿判据 仿真 

分 类 号：TM711[电气工程—电力系统及自动化] TM743