| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a single operation detector which can improve the power factor of an inverter circuit. <P>SOLUTION: The single operation detector 5 is provided, between a distributed power supply 2 and a commercial system 3, with an inverter circuit 11 for injecting the output current of reactive power; a filter circuit 12 for cutting the high-frequency components from the output current; a circuit 14 for detecting single operation, based on the variations in the injected reactive power; a section 30 for calculating the reactive energy of a desired output current; and an output current control section 31 performing drive control of the inverter circuit, in order to deliver an output current based on the reactive energy thus calculated. The single operation detector 5 is further provided with a correction gain section 28 for calculating the amount of inrush current flowing to a capacitor 12B, based on the system frequency and the voltage value of system voltage, and the capacitance of the capacitor and then delivering the reactive energy of the amount of the inrush current. The output current control section adds the reactive energy of the amount of inrush current and the reactive energy of the amount of the current that should be output and then performs drive control of the inverter circuit to deliver the output current, based on the addition result. <P>COPYRIGHT: (C)2008,JPO&INPIT |
