| 摘要 |
PURPOSE:To improve the operating efficiency by controlling the control pulse width of an inverter with detected currents of the inverter and a load when two inverters which employ a solar battery as a power source and a single phase 3- wired commercial power source are operated in parallel. CONSTITUTION:Inverters 2, 2' which employ as a power source a solar battery and a single phase 3-wired commercial power source 4 are connected in parallel to supply power to two loads 5, 5', and operated so that the sum of supply power of the inverters 2, 2' do not exceed the total demand power of the loads 5, 5'. The output currents of the inverters 2, 2' and the currents of the loads 5, 5' are respectively detected by detectors 13, 14, and the control pulse width of the inverters 2, 2' is controlled by the CPU20 so that one output current always becomes maximum. Accordingly, the both loads 5, 5' can be individually shared in both systems, and the solar battery 1 can be always operated at the maximum operation point. |
