MVDC Distribution Concept for Green Data Centers: Achieving the Sustainability Roadmap with Highest Efficiency

Abstract:
This paper proposes a DC electric energy distribution scheme for data centers. Most state-of-the-art data centers use AC distribution at all voltage levels, from MV at the feeder substation down to the 380 VAC indoor distribution level for direct connection of IT racks. This paper provides a DC distribution scheme that is equivalent to state-of-the-art AC distribution systems in terms of specific and very stringent availability and reliability requirements. It features significant benefits in terms of efficiency and controllability and focuses specifically on the integration of solar power, fuel cells, and battery-based UPS, with the MV Solid State Transformer (“SST”) as the enabling technology. The proposed DC distribution scheme provides flexible solution for future green data centers committed to the 2030 Sustainability Roadmap – 100% supply from renewable energy sources at any hour.