Efficiency comparison of DC and AC distribution systems for distributed generation

In recent times, dc power has witnessed a remarkable increase in various parts of the power system namely generation, transmission and utilization. This paper, however, attempts to show brighter prospects of using dc power for the distribution part in residential areas where distributed generation is being used. The paper also presents a mathematical technique which enables determination of minimum required efficiencies of power electronic converters in the dc system, which will make the system at least as efficient as any given ac counterpart. Dc systems can be practically considered only when these minimum required efficiency values are economically achievable.