Security constrained optimal power flow in a power system based on energy storage system with high wind penetration

Abstract

This study is focused on assessing the effect of Energy Storage System (ESS) on security improvement of power systems hosting remarkable renewable energy resources. To this end, the presence of ESS is suitably included in Security-Constrained Optimal Power Flow (SCOPF) model; the required technical amendments are hence considered. To launch a realistic model, ramping constraints of thermal units are also taken into account, which limit the generators from completely responding to power shortfalls. Considering the high penetration level of renewable generations, different scenarios of outages in transmission lines and generators are simulated to measure the Line Outage Distribution Factor (LODF) and Power Transfer Distribution Factor (PTDF). Also, in order to illustrate the economic impact of wind power generation curtailment and load shedding, Values of two penalty parameters of Wind Curtailment (VWC) and Value Of Loss of Load (VOLL) are considered in the model. Two test systems, including a PJM 5-bus system and an IEEE 24-bus RTS, are put under numerical studies to assess the possible impact of ESS on security improvement of the investigated systems. The obtained results are discussed in depth.