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It is a big advantage of a photovoltaic power system to be able to generate power even in a small sized installation. A residential photovoltaic power generator makes the most of this advantage. In this case the controller for the maximum power tracking is required to be compact because space for the control installation can not be easily obtained. For this reason the development of a high frequency controller is essential. However the dynamic characteristics of a solar cell module are different from a static one owing to the presence of hysteresis at a high frequency. In such a high frequency region the conventional tracking method based on no hysteresis can not be responsible for control of the power system. In this paper the authors propose a new self-tuning maximum power tracking method for adjusting the control parameters of the power system at the high operating frequency. This method is distinguished by the fact that the control parameters are adjusted by the estimated value on the dynamic equivalent circuit of the solar cell module. The computer simulation and experimental results of the power system controlled by the proposed method shows excellent performances.

A Self-tuning Maximum Power Tracking Method of Photovoltaic Power Generator.