Unit commitment considering security-constrained optimal power flow by lagrangian relaxation with genetic algorithm

This paper presents unit commitment considering security-constrained optimal power flow (UC-SCOPF) by using Lagrangian relaxation with genetic algorithm (LRGA). The UC from LRGA is checked with optimal power flow (OPF) to ensure power transmission. Under normal operating state, UC may not satisfy system operating constraints in OPF and hence committed units must be adjusted to take into account those constraints. This paper also considers UC taken into account system contingency, which is called UC-SCOPF. The generation outputs for UC-SCOPF are the outputs at normal operating state that ensure the system security when contingency occurs.