Abstract: This article proposes grey wolf optimization (GWO) technique to solve Security constrained optimal power flow (SCOPF) problem. The proposed algorithm incorporates weighted penalty function for optimal adjustment of voltage and active power injection at generator bus along with ratio of tap changing transformer as control parameters to get the minimum total generation cost. The technique was tested on IEEE 30 bus system with quadratic cost function and totals 15 control parameters, both base case optimal power flow (OPF) and SCOPF solutions were obtained. In second case reactive power injection by shunt capacitors were also considered as control variables, the results were compared with other algorithms found in literature.
Keywords: Optimal power flow, Security constrained optimal power flow, Grey wolf optimization, IEEE 30 bus.