Patent ID: 9583645
Date: 2017-02-28
CPC Classifications: G05F,H01L,H02S,Y02E

Claim:
1. A photovoltaic system, comprising: a plurality of photovoltaic modules serially connected and being configured to generate power from solar light; a power optimizer coupled to the plurality of photovoltaic module to receive the generated power as an input power and to provide an output power, the power optimizer comprising: an input unit coupled to the plurality of photovoltaic modules to receive the generated power; a sensing unit configured to sense voltage and current of the power generated by the plurality of photovoltaic modules; a DC-DC converter configured to lower or boost a voltage of the input power of the power optimizer by a preset reference value, with respect to a voltage of the output power of the power optimizer; a bypass unit; a controller configured to: execute a maximum power point tracking (MPPT) algorithm; stop executing the MPPT algorithm and operate the bypass unit to bypass the output power of the power optimizer when a difference between presently-sensed current sensed by the sensing unit and previously-sensed current sensed by the sensing unit exceeds a preset reference value; an inverter coupled to the DC-DC converter to convert DC voltage received from the DC-DC converter to AC voltage to provide to a load; and a power supply unit configured to supply power to the sensing unit, the controller, the DC-DC converter, and the bypass unit, based on the generated power received by the input unit.