| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve efficiency of an inverter circuit to reduce loss of a system interconnection power converter in a comparatively easy circuit configuration. <P>SOLUTION: In the system interconnection power converter, an inverter control circuit uses a value obtained by adding a voltage value to be applied to at least a choke coil and a semiconductor switch in an inverter circuit to a system voltage value to be detected by system voltage detection means as a target value of intermediate voltage, and the maximum value of the target value of the intermediate voltage is determined by a value larger than a peak value of the maximum value of the system voltage. Power to be supplied to the system side is controlled by changing the current of the inverter circuit with operation of the semiconductor switch of the inverter circuit so that the target value of the intermediate voltage can be a value smaller than the maximum value of the target value of the intermediate voltage by approximating the intermediate voltage detected by capacitor voltage detection means to the target value of the intermediate voltage, according to the peak value of the system voltage detected by the system voltage detection means. <P>COPYRIGHT: (C)2012,JPO&INPIT |
