A benders decomposition approach to corrective security constrained OPF with power flow control devices

This paper studies a DC Corrective Security-Constrained OPF (SCOPF) in electricity networks in which the transmission lines are potentially instrumented with Distributed Flexible AC Transmission Systems (DFACTS). Hence, in the considered SCOPF, the transmission lines' reactance along with the generators' output are considered as control variables. The objective of this SCOPF model is to obtain minimum generation cost while maintaining the system N-1 secure. Benders decomposition is applied to solve the discussed DC SCOPF problem. Case studies for the IEEE 30-bus test system, the IEEE 39-bus test system and the IEEE 118-bus test system are presented. The performance of Benders decomposition is compared to a brute force approach, in which the DC SCOPF is solved as a single optimization problem, with respect to run-time and accuracy of the results.