抄録
The authors have already developed the Flexible, Reliable and Intelligent Electrical eNergy Delivery System (FRIENDS) as a future promissing delivery system. The most important function in FRIENDS is to execute customized power quality services by introducing Quality Control Center (QCC) between a distribution substation and electric consumers. Further, QCC can also supply a DC power directly using DC type dispersed generators such as fuel cell system (FC system), micro gas turbine (MGT). Therefore, if there are enough demands to the DC supply, introducing QCC or FC system (MGT) may give an economical value.
This paper considers a model of a quality control center which will be installed in an underground of an office building and analyzes the values of the DC supply using the model. Further, this paper proposes a method for determining the optimal capacity of facilities to be installed in QCC corresponding to the rate of DC demand to AC demand from an economical viewpoint. Also, this paper examines the optimal capacity of facilities to be installed in QCC considering the multi-quality power supply that classifies loads in the demand side according to the qualities.
