Vulnerability Control for Power System by Smart Demand Response

This paper presents a new method of vulnerability control for power system by smart demand response (SDR) to insure system vulnerability value kept at a steady level. Vulnerability model is based on sensitive technology (ST) and complex network (CN) theory to reflect physical and structural characteristics of power system. In this paper, ST is adopted by line outage distribution factor (LODF) to show sensitivity of transmitted active power both on system and branch caused by transmission line broken. Betweenness centrality (BC) in CN theory is used to reflect importance of transmission power line in power system topology with consideration of characteristics of power flow distribution. Vulnerability control by smart demand response (SDR) is based on assumption of system load increase at different load points. IEEE-14 case is provided to verify the presented method and the results show that the method is feasible and effective.