Coordinated voltage control of distribution networks hosting dispersed generation

This paper presents a centralized control scheme to regulate distribution network voltages in the prese nce of dispersed generation. The algorithm resorts to mode l predictive control to smoothly bring unsatisfactory voltages inside the desired range of values. Using a sensitivity model, the controller calculates optima l power output changes of distributed generators to correct the network voltages, giving priority to reactive over active power. Simulations results are presented on a 32-bu s test system and three variants of the optimization probl em are compared.