摘要
提出了电力系统集成保护的方案,描述了一种基于暂态电流极性比较原理的多出线集成保护系统.当故障发生后,对母线所有出线的暂态电流模量的模极大值进行极性比较就可以判别故障发生的相对位置.理论分析和仿真结果表明,利用单侧母线各出线的暂态电流信号的模量进行小波变换后的模极大值极性来判别故障的相对位置是切实可行的.
Power system transient protection has the advantages of high response speed, high accuracy anti is not affected by power frequency phenomena, e, g. oscillation and transition resistance. The paper presents the scheme of integrated protection and introduces integrated protection system based on transient current polarity comparison principle. The relative situation of the fault can be distinguished by the transient current modular maximum polarity comparison from all the emanating line of a single bus. Theoretical analysis and extensive simulation studies show that it is feasible to utilize transient current modular maximum polarity comparison to distinguish the relative situation of the fault through wavelet transform.
出处
《北京交通大学学报》
EI
CAS
CSCD
北大核心
2007年第3期105-108,共4页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
国家自然科学基金资助项目(50677003)
北京交通大学科研基金资助项目(E06J0060)
关键词
集成保护
暂态电流
极性比较
模极大值
integrated protection
transient current
polarity comparison
modular maximum
