Photovoltaic System using the Stepdown Chopper and Current Source Inverter

강압쵸퍼와 전류형 인버터를 이용한 태양광발전 시스템

In this paper, we compose of the stepdown chopper and the current source inverter. Because dc side current of the current source inverter pulse with twice frequency of utility, we control that modulation factor of chopper is pulsed twice frequency. Therefore if voltage across the dc reactor equal to zero, it tis decreased. And we control modulation factor of the chopper to operate at maximum power point around of solar cell.