Tokyo Electric Power Company Holdings.-1-cho-ku-8510Kanagawa;
Kansai Electric Power Company.-11-20-0974 Hyogo;
Kyushu Institute of Technology-1 Sensui-cho-ku 804-8550;
Fukushima Renewable Energy Institute(FREA)-2-9 Machiikedai-0298 Fukushima;
Renewable energy; System inertia; Fast Fourier Transform(FFT); INVERTER;