Development and standardization of higher-voltage direct current power feeding system

We discuss the advantage of highly efficient and reliable higher-voltage direct current (HVDC) power feeding systems and the standardization activities for the power interface conditions in ICT equipment. With the recent spread of Internet services, the power consumption of ICT services is increasing annually. Many data center servicers want to decrease the power consumption of ICT equipment, cooling systems, and power feeding systems. HVDC power feeding systems have recently drawn attention due to their high efficiency and reliability. Such systems are more efficient than AC power feeding systems and are as reliable as conventional −48-V DC power feeding systems. However, the feeding voltage of HVDC systems is DC 380-V, which is higher and different than the conventional voltage of DC −48 V. ICT equipment is needed to change the power supply unit's interface. Therefore, we are actively standardizing the power interface condition of power supply units in ICT equipment. The European standards bodies of the European Telecommunications Standards Institute and International Telecommunication Union consented to the power interface conditions this year.