Consumed power control of time deferrable loads for frequency regulation

Connection of a large number of dispersed generators to distribution networks is not easy due to various technical considerations. Thus we have been trying to devise a concept for future electrical distribution systems with a lot of dispersed generators. In this work, it has been considered that each customer´s load and each generator´s active and reactive power should be controlled in order to stabilize and optimize the networks. Under this consideration, two control methods for future distribution systems are proposed: a cooperative control and an independent control. An electric power system with a lot of time deferrable electric water heating and storage systems has been supposed, and the frequency regulation ability has been analyzed using the numerical calculation. The results of the analyses have shown that the frequency regulation ability becomes higher with the cooperative control than that with the independent control.