Low Voltage DC Distribution System

AC distribution is conventional and its future is now under threat with its major competitor DC distribution. Transformer voltage conversion can be replaced completely by DC-DC converter in DC distribution with voltage and current regulation. DC energy and energy saving as the distribution match well with the recent technology in renewables, energy storage, computer and control electronics, modern lightings and electric mobility which are all DC based. Using DC, the AC-DC and DC-AC conversions will no longer be needed. The higher processing efficiency, simple control in power quality, easy voltage source connection and material reduction are the obvious advantages. The paper discusses the recent development of DC distribution and its technology. The work in voltage level, soft-switching, safety and protection are the area of recent development. Power Electronics is a driving force to realize this future power distribution. Analyses on the voltage and efficiency are also complemented with the description. It is expected that the DC distribution demonstrates a power innovation in the world and open a new chapter for energy saving and power utilization. Keywords–DC distribution, AC distribution, energy storage, DC-Dc converter, inverter