A Voltage Control Method for Power Distribution Lines Utilizing Dispersed Customer Resources

This paper proposes a voltage control method in cooperation with a tap changer, such as a step voltage regulator, for power distribution lines using power conditioning systems. Generally, a town which plays a role of a virtual power plant has an energy management system and consists of a lot of power conditioning systems in houses. In this paper, it is clarifies that the method is able to control the voltage at the connecting point of the distribution system properly cooperating with the step voltage regulator under several voltage fluctuation conditions. Furthermore, it is shown that a communication between the energy management system and power conditioning systems enables the system to resolve unevenness output of reactive power of the power conditioners.