Patent ID: 8493753
Filing Date: 2013-07-23
Classification: H02J,H02M,Y02E

Abstract:
1. A photovoltaic powered system providing a direct current (DC) power through a photovoltaic module and converting the DC power into an alternating current (AC) power grid-connected to an AC utility power; the photovoltaic powered system comprising: a coupling capacitance unit electrically connected to the photovoltaic module to filter the DC power outputted from the photovoltaic module; and an AC module electrically connected to the coupling capacitance unit to convert the filtered DC power into a quasi-sinusoidal current; the AC module comprising: whereby the quasi-sinusoidal current is converted into a sinusoidal current and high-frequency harmonic components of the sinusoidal current are filtered to produce a sinusoidal output current in phase with the AC utility power, thus realizing the maximum power point tracking (MPPT) of the photovoltaic module and feeding unity-power-factor power into the AC utility power.