Patent ID: 7859241
Filing Date: 2010-12-28
Classification: G05F,H02M,Y02E,Y10S

Abstract:
1. A photovoltaic power generation controller, comprising: a solar cell generating electric power via reception of light; a power converter converting power generated by the solar cell to a predetermined power form; a control circuit controlling a modulation factor for the power converter; a voltage detector detecting an output voltage of the solar cell; a current detector detecting an output current of the solar cell; a high-pass filter removing direct-current components of the voltage detector and the current detector; amplifiers respectively amplifying voltage output and current output from the high-pass filter; switches switching between output signals from the voltage detector and the current detector and respective output signal from the amplifiers to conduct signal output; and a power detector obtaining a power value from the voltage signal and the current signal that are output via the switches and inputting the power value to the control circuit, wherein the control circuit shifts the switches to respective output sides of the voltage detector and the current detector; performs maximum power point tracking control in which: the power value is observed while varying the modulation factor, to search for an operating point at which the power value is maximum; and then shifts the switches to respective output sides of the amplifiers to continue the maximum power point tracking control.