Enhancement of sun-tracking with optoelectronic devices

Jiunn Chi Wu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Sun-tracking is one of the most challenging tasks in implementing CPV. In order to justify the additional complexity of sun-tracking, careful assessment of performance of CPV by monitoring the performance of sun-tracking is vital. Measurement of accuracy of sun-tracking is one of the important tasks in an outdoor test. This study examines techniques with three optoelectronic devices (i.e. position sensitive device (PSD), CCD and webcam). Outdoor measurements indicated that during sunny days (global horizontal insolation (GHI) > 700 W/m2), three devices recorded comparable tracking accuracy of 0.16∼0.3°. The method using a PSD has fastest sampling rate and is able to detect the sun's position without additional image processing. Yet, it cannot identify the sunlight effectively during low insolation. The techniques with a CCD and a webcam enhance the accuracy of centroid of sunlight via the optical lens and image processing. The image quality acquired using a webcam and a CCD is comparable but the webcam is more affordable than that of CCD because it can be assembled with consumer-graded products.

Original languageEnglish
Title of host publication11th International Conference on Concentrator Photovoltaic Systems, CPV 2015
EditorsGerald Siefer, Mathieu Baudrit, Ignacio Anton
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735413269
StatePublished - 28 Sep 2015
Event11th International Conference on Concentrator Photovoltaic Systems, CPV 2015 - Aix-les-Bains, France
Duration: 13 Apr 201515 Apr 2015

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference11th International Conference on Concentrator Photovoltaic Systems, CPV 2015


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