Power distribution and conversion architectures for DCs
This activity aims at addressing the power distribution in DC, from the connection to the utility ac grid, distribution throughout the DC with dc, down to the supply in the rack for the loads.
This follows recent trends at the DC power supply domain where moving from ac to dc distribution presents various advantages such as:
• Improved efficiency
• Reduced number of conversions
• Integration of batteries
• Integration of DC sources (e.g., PV)
• Increased reliability
Tasks
Two main technological solutions will be developed and demonstrated in two interlinked parts:
(a) a galvanically isolated power converter for the main supply, from 400Vac mains to a direct current power distribution network of 800Vdc (±400Vdc), and
(b) a dc-dc rack power supply from 800Vdc (±400Vdc) to 48Vdc/12Vdc for the individual server racks.
In both cases, the main design optimization criterion is the efficiency of the solution, followed by power density, considering that space is at a premium cost in DC. Galvanic isolation is mandatory for safety and will be implemented with high-frequency operated transformers.
