同步发电机三相突然短路的定性分析

Qualitative Analysis on Three-Phase Suddenly-Applied Short Circuit of Synchronous Generator

提出了同步发电机三相突然短路(三相突短)的物理关系图,并对该图进行了三个方面的解读:电流分类、电流关系、电流衰减。关于电流分类提出两种分类观:周非观、稳衰观。并总结出简明扼要的七个关键字"周、基、二、非、稳、瞬、超"。关于电流关系通过把传统的感生作用区别为割生、侵生两种作用,提出父子、父子孙两种关系。关于电流衰减总结出"同族电流统一按父电流时间常数衰减"的规律。

This paper gives a physical relation chart of synchronous generator under three- phase suddenly-applied short circuit and explains the chart from three aspects of current classifi- cation, current relationship and current decay. As to current classification, both perlodic-non- periodic and stable decayable view points are proposed, and 7 concise keywords ＂periodic, bas- ic, second, nonperiodic, stable, transient and super-transient＂ are summarized. As to current relationship, two current relationships of father-son and father-son-grandson are proposed by di- viding traditional induction action into cut action and entrancing action. As to current decay, the law is summarized that currents in one family have the same decaying time constant as the father＇s.