Solar power-generating system

Abstract

To provide a solar power-generating system that prevents a working point of each solar panel from getting out of a maximum power point.SOLUTION: A solar power-generating system constituted by connecting, in parallel, a plurality of power generation systems each comprising a solar panel, and a DC-DC circuit part for controlling an operation point of solar power generation by a duty ratio of a driving signal of a DC-DC converter comprises: a first control part for driving the DC-DC circuit part at the duty ratio at which the solar panel outputs maximum power by executing maximum power point follow-up control, with respect to a host power generation system as one of the plurality of power generation systems; and a second control part for correcting the duty ratio of the DC-DC circuit part based on a variation ratio by deriving the variation ratio of an input voltage or an output voltage at the DC-DC circuit part before and after executing the maximum power point follow-up control by the first control part, with respect to each of slave power generation systems becoming other than the host power generation system in the plurality of power generation systems.SELECTED DRAWING: Figure 1

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