Field demonstration on multiple power quality supply system in Sendai, Japan

We present the progress of a new project, a field demonstration of a multiple power quality supply system. The project is the first trial to take place in Japan in the area of power quality concepts and solutions. For this project, NTT facilities developed and installed a multiple power quality supply system that has the capability to feed four classes of alternative current (AC) and one of direct current (DC) power while meeting various customer requirements. The system also has three types of distributed generator (DG): gas engine sets, fuel cells, and photovoltaic panels. The rated capacity of the DG's is just 1 mega-watt. NTT Facilities started the project in Fiscal Year (FY) 2004 and plans to continue it for four years. We have been testing the multiple power quality supply system in the field since October 2006. Some sets of test data and an analysis using the data indicate that the developed system meets all the requirements for distributed generator related plants and has additional benefits. This paper presents the results of a review of the project's first three years, our plans for the future, and an idea about how to assess the power quality data that the project will generate.