摘要
考虑到配电网单相接地情况复杂,单一的选线方法适应性差,对各种选线方法进行了研究,认为零序电流基波分量幅值最大且稳定,基于基波分量的几种选线方法可用同一硬件平台实现;并详细分析了其中的有功分量法和电流增量法,证明了这2种选线方法的可行性和实用性。在此基础上,将这几种选线方法有机结合在一起,运用模糊综合决策理论,选出故障线路,可大幅度提高选线准确率及装置的适应能力。给出了选线装置的软、硬件设计及电磁兼容设计。实验室模拟电网试验和现场挂网结果表明,装置运行稳定,选线准确,适应性强。
Conditions of single- phase grounding fault in distribution network are complicated and the fault line selection with any sole method is not practicable. Various methods of grounding fault line selection are analyzed and the conclusion is that ：the fundamental component amplitude of zero -sequence current is big and steady,and different selection methods based on it may be implemented on same hardware platform. The active component method and the zero-sequence current increment method are analyzed in detail and their feasibility and practicability are demonstrated. The fuzzy integrated control theory is used to integrate these fault line selection methods in one device to enhance its correctness rate and practicability. The software and hardware designs,as well as the electromagnetic compatibility design,are provided. Experimental results and site operations verify its stability,veracity and applicability.
出处
《电力自动化设备》
EI
CSCD
北大核心
2007年第5期114-117,共4页
Electric Power Automation Equipment
关键词
小电流接地
选线
装置
消弧线圈
small current grounding
fault line selection
device
arc-suppression coil
