Enhanced Corrective Security Constrained OPF with Hybrid Energy Storage Systems

Hybrid Energy Storage Systems (HESS) has the ability of providing fast and accurate response to second-to-second changes of the grids for keeping the power system uninterrupted and stable. This paper presents an enhanced Corrective Security Constrained Optimal Power Flow (CSCOPF) model by combining the technical merits of different Energy Storage technologies. The proposed HESS can be employed to take part in not only the traditional long-term rescheduling corrective control actions, but also the short-term post-contingency fast corrective control, which takes into account the current state of charge (SOC) and the energy capacity model of the HESS. An improved Benders decomposition (BD) method is developed to solve the enhanced CSCOPF problem and the effectiveness of the proposed method is evaluated and demonstrated in the paper by standard power systems.