Unbiased optimal power flow for power systems with wind power generation

Introduction: Optimal power flow (OPF) is an enhanced form of the economic dispatch (ED) optimisation problem where both active and reactive powers are treated as control variables and adjusted to minimise generation cost while observing associated power flow constraints. The constraints include but are not limited to thresholds on bus voltages, reactive power generation and the thermal ratings of transmission lines. The large-scale penetration of wind generation has created major technical challenges for power system operation which in turn manifests itself in the associated ED and OPF problems for the concerned power system [1]. This Letter discusses an OPF problem for a power system consisting of thermal and wind turbine generators (WTGs) and proposes a cost function to promote equitable scheduling of power from multiple wind power plants.