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THE ENERGY BALANCE OF A PV STRING EQUIPPED WITH SOLAR TRACKER

10.15660/AUOFMTE.2014-1.2962

Catalin ALEXANDRU

Volume XXIII (XIII), 2014/1

The paper puts forward a photovoltaic (PV) string equipped with solar tracker. This is a dual-axis tracking system, with two degrees of freedom, which correspond to the daily and seasonal (elevation) motions. A rotary motor drives the daily motion, while for the seasonal orientation there is used a linear actuator. The daily motion is transmitted to all the modules of the string with a multi-parallelogram mechanism, which also assures the frame for transmitting the seasonal motion. The main objective of the research is to increase the energetic efficiency of the PV system, by maximizing the rate of incident solar radiation with minimum energy consumption for performing the tracking. The study is approached by developing the virtual prototype (dynamic model) of the solar tracker, which integrates the multi-body mechanical device (developed in ADAMS) and the control system (designed in EASY5), in mechatronic concept.

Keywords: energy balance, photovoltaic string, simulation, solar tracker.

ISSN 1583-0691, CNCSIS "Clasa B+"