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TRACKER ACCURACY: FIELD EXPERIENCE AND CORRELATION WITH METEOROLOGICAL CONDITIONS

TRACKER ACCURACY: FIELD EXPERIENCE AND CORRELATION WITH METEOROLOGICAL CONDITIONS,M. Davis,B. Stafford,M. Martínez,D. Sánchez

TRACKER ACCURACY: FIELD EXPERIENCE AND CORRELATION WITH METEOROLOGICAL CONDITIONS  
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Tracker performance is a significant factor in the energy production of photovoltaic systems, especially concentrating photovoltaic (CPV) systems, but reported accuracies are often theoretical or not true accuracies but the resolution of an encoder or algorithm. In addition, the nonlinear relationship between CPV optic pointing accuracy and energy production means that simple specifications such as average tracker accuracy are not sufficient for predicting performance of these systems. Finally, trackers are currently a significant component of system cost. Understanding the tracking errors (as well as which types of errors have a less significant impact on energy production) is an important step in designing lower-cost tracking systems. In this paper we present a method of tracker characterization, a way of weighting which tracking errors are most important, and a collection of real- world accuracy data measured on a range of trackers.
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