[1] Energy Network Group, Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 2, 1-1-1 Umezono, Tsukuba, 305-8568, Japan
[2] KRI, Inc., 134 Chudoji-Minami-Machi, Shimogyo-ku, Kyoto, 600-8813, Japan
[3] Distributed Energy System Research Group, Energy Technology Research Institute, AIST, Tsukuba East, 1-2-1 Namiki, Tsukuba, 305-8564, Japan
[4] Oita, Industrial Research Institute, 1-4361-10 Takae-Nishii, Oita, 870-1117, Japan