The Control Method and Design of Photovoltaic Tracking System

The solar energy has an enormous developing application capacity as one kind of green renewable energy source which can be continuously used forever. But there is tremendous relationship between photovoltaic cells output characteristics and the change of external environmental factors, currently the efficiency of PV cells is not only low but also expensive on a large scale of production. It is very important to further improve the efficiency of its device. This is an important question which has need to be solved at present. In this paper, the feed-forward and closed-loop control trackinging scheme is proposed to improve the tracking efficiency of solar photovoltaic panel. The solar photovoltaic panel rotation angle for the feed-forward track is obtained according to the trajectory of the sun. The photoelectric sensor is used to detect the photoelectric signal for the closed-loop control of solar photovoltaic panel, so that the errors of the tracking devices of solar photovoltaic panel are overcome during the installing, production and processing and the tracking control accuracy is improved greatly. In addition, solar radiation utilization rate is improved exactly through the simulation experiment.