ENERGY GATEWAY HOUSEHOLD APPLIANCE DIRECT CURRENT MICRO GRID SYSTEM AND ENERGY MANAGEMENT METHOD THEREFOR

摘要

An energy gateway a household appliance a direct current micro grid system and an energy management method therefor. The energy gateway comprises: a direct current input end (1) for being connected to a direct current output end of an external solar power generation apparatus (2). The energy gateway further comprises a first direct current output end and/or a second direct current output end for supplying power to an external direct current electrical appliance (4) wherein the first direct current output end is directly connected to the direct current input end and the second direct current output end is connected to the direct current input end via a direct current voltage transformation apparatus (5). The energy gateway the household appliance and the direct current micro grid system make a grid connected inverter dispensable reduce device investment and electric energy conversion links and improve the utilization efficiency of new energy photovoltaic power generation. Furthermore since the household appliance directly supplies power with a direct current an internal rectification module can be removed so as to reduce device investment and electric energy conversion loss and eliminate multiple problems; for example electric energy quality being influenced by harmonic pollution brought by the household appliance to a power grid.