电力系统静态失稳和周期振荡的局部分叉分析

LOCAL BIFURCATION IN POWER SYSTEMS:LOSS OF STEADY-STATE STABILITY AND PERIONDIC OSCILLATION

探讨了电力系统稳定的局部分叉方法，将电力系统静态失稳和周期振荡的研究统一用局部分叉理论进行分析，文章给出了由于无功负荷的变化，引起系统周期振荡和电压崩溃的算例。它们分别对应着Ｈｏｐｆ分叉和鞍结分叉。本文的研究表明局部分叉理论能够从系统结构上更全面地抓住电力系统的稳定特征。

This paper discusses the stability of the power system,making use of local bifurcationtheory. Steady-state stability and periodic oscillation are combined to analyze through localbifurcation theory.The paper also gives the example of periodic oscillation and voltage callapse,corresponding to Hopf bifurcation and saddle-node bifurcation respectively,with the variation ofreactive load.The research of the paper indicates that the stable character of the power systemscan be grasped in the structure by local bifurcation theory.