基于FTU的配电网接地保护  

Some grounding fault protection schemes implemented on FTU for distribution power systems

作　　者：陈星[1] 朱志杰[1] 曾祥君[2] 杨小青 

机构地区：[1]湖南大学电气与信息工程学院,长沙410082 [2]长沙理工大学电气与信息工程学院,长沙410076 [3]宁波天安集团高压电器有限公司,浙江象山315709

出　　处：《仪器仪表用户》2005年第5期102-104,共3页Instrumentation

基　　金：国家自然科学基金资助(编号:50207001)湖南省杰出青年基金资助(编号:04JJ1011)

摘　　要：传统的比较零序电流故障选线方法,不便在配电自动化现场终端单元(FTU)上实现。本文提出了几种基于FTU仅需就地采集电压电流量的接地保护方法,并对各种接地保护方法进行信息融合处理,提出了故障线路模糊识别技术。EMTP仿真和动模实验结果表明该接地保护具有很高的精度和鲁棒性,完全能够满足配电自动化要求。Traditional fault detection schemes based on zero sequence currents are difficult to satisfy the requirement of distribution automation （DA）. In order to improve it, some novel techniques for ground-fault feeder detection are presented in this paper, and they are implemented with currents and voltages tested by feeder terminal unit （FTU）. With information fusion techniques, faulty feeder is identifi ed by fuzzy analysis. The protection schemes have been tested by EMTP simulation. A prototype has been developed and tested in a dynamic power system. Results show that these proposed protection schemes have high sensitivity and robustness.

关 键 词：配电自动化 FTU 

分 类 号：TP216.1[自动化与计算机技术—检测技术与自动化装置]