渭南师范学院学报：综合版
渭南師範學院學報：綜閤版
위남사범학원학보：종합판
Journal of Weinan Teachers College
2011年
12期
38-41
,共4页
无限大容量%三相短路%暂态过程%周期分量%非周期分量
無限大容量%三相短路%暫態過程%週期分量%非週期分量
무한대용량%삼상단로%잠태과정%주기분량%비주기분량
infinite-capacity power%three-phase short circuit%transient process%periodic component%non-perlodic component
通过对无限大容量供电系统三相短路过程的分析，发现在三相短路过程中，其短路电流由周期分量和非周期分量组成．正是由于非周期分量的出现，才使电感中电流在突然短路瞬间前后不会突变．由于非周期分量的存在，在暂态过程中短路全电流曲线不与时间轴对称，以致短路后将出现比短路电流周期分量幅值更大的冲击电流．
通過對無限大容量供電繫統三相短路過程的分析，髮現在三相短路過程中，其短路電流由週期分量和非週期分量組成．正是由于非週期分量的齣現，纔使電感中電流在突然短路瞬間前後不會突變．由于非週期分量的存在，在暫態過程中短路全電流麯線不與時間軸對稱，以緻短路後將齣現比短路電流週期分量幅值更大的遲擊電流．
통과대무한대용량공전계통삼상단로과정적분석，발현재삼상단로과정중，기단로전류유주기분량화비주기분량조성．정시유우비주기분량적출현，재사전감중전류재돌연단로순간전후불회돌변．유우비주기분량적존재，재잠태과정중단로전전류곡선불여시간축대칭，이치단로후장출현비단로전류주기분량폭치경대적충격전류．
Through the analysis of three-phase short circuit of infinite-capacity power supply system, we find out the short-circuit current is made up by the periodic component ip and non-periodic component i~p. It is because of non-periodic component, the current in the inductor will not be changed instantly in a sudden short-circuit. Because the existence of non-periodic component, the full current curve of short-circuit and time axis is not symmetrical in the transient process. This will lead to the instantaneous maximum amplitude value more than the periodic component of short-circuit.
