OUTPUT OPTIMIZATION STRING OPTIMA, PHOTOVOLTAIC POWER GENERATION SYSTEM COMPRISING SAME, AND OUTPUT OPTIMIZATION PHOTOVOLTAIC POWER GENERATION METHOD USING SAME

摘要

The present invention provides an output optimization string optima, a photovoltaic power generation system comprising the same, and an output optimization photovoltaic power generation method using the same. The output optimization string optima performs switching of a plurality of DC-DC converter for converting generated output supplied from solar cell strings from direct current to direct current at different time points and sets up an inter-converter switching time at equal time intervals, thereby minimizing the pulsation of the converted generated output. According to the present invention, an output optimization string optima is connected to a solar cell array comprising a plurality of solar cell strings in which a plurality of solar cell modules are connected to each other to follow a maximum power point for each of the solar cell strings, and transforms the voltage of the generated output to output the converted power. The string optima includes: a plurality of optima converters which is connected to each of the solar cell strings to follow the maximum power point by each of the solar cell strings, produces the converted power from the generated output supplied from each of the solar cell strings, and performs the switching for the production of the converted power; and an optima controller which controls the maximum power point following of the optima converters and the switching time thereof, in which the voltage of the converted power outputted from the optima converters is constant.;COPYRIGHT KIPO 2014