2006 Volume 126 Issue 10 Pages 1039-1048
As a future power distribution system, Flexible, Reliable and Intelligent ENergy Delivery System (FRIENDS) has been proposed. In FRIENDS, various functions become realizable by installing new facilities called Quality Control Centers (QCCs) between distribution substation and customers. Moreover, in fault case of upstream power system, multiple QCCs become independent of distribution system and an isolated system is constituted by interconnected QCCs. Furthermore, an isolated system operation which uses Distributed Generators (DGs) and Energy Storage Systems (ESSs) which are installed in QCC as the main power supply will be performed. In an isolated system by QCCs, a method for balancing supply and demand based on Distributed Autonomous Operation of QCCs using a frequency deviation is proposed by applying the concept of frequency control which has been performed by the utility. Simulation results to investigate the effectiveness of the proposed method are shown in this paper.