•A novel and improved approach is proposed for preventive-corrective security-constrained optimal power flow (PCSCOPF) problem.•The contingencies are optimally partitioned into two exclusive sets: one is secured in the preventive control (PC) stage and the other in the corrective control (CC) stage.•The PC corresponds to an ordinary SCOPF model and solved by the Benders decomposition method; the CC corresponds to an ordinary OPF model.•The optimal partitioning of the contingencies is determined using an evolutionary algorithm (EA).•The searching dimension only depends on the number of insecure contingencies, hence tends to lead to a much higher solution speed.
Electric Power Systems Research – Elsevier
Published: Mar 1, 2016
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