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Grounding and safety considerations for residential DC microgrids

DC-based microgrids are promising solutions to enhance the energy efficiency, reliability and safety of residential and commercial buildings, as well as to provide more effectively higher penetration of renewable energy resources into the electrical grid. However, despite the great effort that is being done by electronics, telecom/datacom and buildings sector companies and entities upon the standardization of DC distribution networks, the lack of practical experience and safety issues regarding the utilization of DC powered buildings still works against DC adoption. This paper aims to contribute with the discussion about residential DC microgrid safety by evaluating system grounding schemes and its effects on personal safety and endurance to ground faults.