Intelligent coordinative voltage and reactive power control

A novel local voltage control is proposed where each voltage controller of a generating unit is equipped with additional coordinative voltage controller (CVC), which incorporates intelligent control into the power system. The controllers use artificial neural networks (ANN), trained on a large set of power system states. Optimal power flow (OPF) results serve as the optimal target in the ANN training process. All data the controller needs for operation are acquired locally. The proposed ANN voltage control maintains a sub-optimal power system voltage profile and reduces the power system losses. When equipped with ANN controllers, the system responds satisfactorily to changes in the power system topology, thus improving the power system security.