摘要
提出一种新型差动保护,在时域中对两端电流的故障分量波形进行比较,并且考虑全频域内的信号, 较少受故障期间暂态分量的影响。同电流差动保护相比,该保护可更可靠、快速动作,同时,它对信号的同步要求较低,也较容易实现与整定。
A new differentialprotection schem e is designed, in which the currentfaultcom ponentw aves in two term inals of the protected transm ission line are com pared in tim e-dom ain, and the w hole inform ation in frequency dom ain is taken into account. Com pared with currentdifferentialprotection, the new protection has better perform ance on resisting the influence oftransientcom ponent, higher reliability and fasterspeed. The dem and for the synchronism ofthe currentis com paratively low . Itfreesfrom thesystem oscillation. Itcan be realized easily and could bethe prim ary protection ofthelong transm ission linesw ith ultra-high-voltage. This projectissupported by the Research Fund forthe DoctoralProgram ofHigherEducation (RFDP) (No.96048723).
出处
《电力系统自动化》
EI
CSCD
北大核心
2000年第3期14-18,共5页
Automation of Electric Power Systems
基金
高等学校博士学科点专项科研基金!资助项目(96048723)
关键词
差动保护
超高压输电线路
主保护
继电保护
tim e-dom ain analysis
differentialprotection
ultra-high-voltage transm ission line
prim ary protection
