Impact of static and dynamic load models on security margin estimation methods

• Security margins methods are significantly affected by the load dynamics in a system. Induction motor loads and fast restoring especially important. based on static assessment may provide overly optimistic estimations. dynamic time-consuming, but more accurate. The post-contingency loadability limit (PCLL) secure operating (SOL) two main approaches used when computing security of an electric power While SOL is computationally demanding than PCLL, it can account for response after disturbance generally provides better measure margin. In this study, difference between these compared analyzed range different contingency model scenarios. A methodology to allow fair comparison developed tested modified version Nordic32 test study shows that differ from system has high penetration with constant characteristics or large share induction restoration. also contingencies, where longer fault clearing times shown increase margins.