The HVDC power supply system implementation in NTT group and next generation power supply system

This paper describes the highly efficient and highly reliable HVDC power supply system that the NTT Group has developed and introduced. We also summarize a technical requirement which is published by NTT, and we built the NTT Group's strategy for HVDC systems implementation. Moreover, we describe a new power supply system concept in order to further reduce power consumption and cost. This system can be applied to future networks and datacenters.