Energy-saving effects of super computers by using on-site solar power and direct HVDC feeding systems

Power consumption of the ICT sector of information and communication facilities and data centers has grown, and this has led to a need to improve energy efficiency of these facilities. DC distribution systems employing 380 VDC as the supply voltage is one promising approach to address this problem, countries around the world and are progressing to develop and deploy commercial services. We demonstrated a 380 VDC power distribution system interconnected with a solar power generation system. This demonstration showed that the 380 VDC power supply system saves more energy than the AC power supply system and showed how carbon dioxide emissions are reduced by integrating the solar power generation system.