Pattern Search Method Research Of Cascading Outage Based On Time Sequence Theory

In recent years,large-scale blackouts of electrical power systems caused by cascading outage have been becoming hot-pot of researchers home and abroad.A search method,which helps us to forecast possible subsequent faults timely and effectively,is of great significance for the reduction of this disaster.As the number of random factors in network is tremendous,it is unlike for us to search the entire cascading outage path;besides,as cascading outage is characteristic of temporal,it will make great contribution to prevent cascading outage that grasping temporal information and seizing possible process of the cascading.Starting from reality and possibility,this article,based on taking account of time of protection movement model,using probability prioritization strategy and combining analytical method of transient stability with fault path search strategy rested on temporal reasoning,propose a more effective search method.The calculation results of IEEE39 show the affectivity of this search method.