POWER CONVERTER, ITS CONTROL METHOD, AND GENERATOR

摘要

PROBLEM TO BE SOLVED: To solve a problem in a solar generator that, when a power necessary for a control circuit, etc., is supplied from the load side of an inverter, in a period, while an input voltage is lower than a threshold voltage, with which the inverter is to be stopped and the inverter is stopped after a certain lapse of time, a power consumed by the inverter is larger than a power outputted by the inverter, i.e., wastage power is consumed. SOLUTION: An input power P1 is integrated during a prescribed time T1 to calculate an integrated electric energy W1 (S1). The calculated integrated electrical energy W1 is compared with a threshold Y1 (S2) and, if W1=Y1, the process is returned to the step S1. A product of the no-load power of the inverter and a prescribed time T1 is set as the threshold Y1.