Cascade closed-loop control of solar trackers applied to HCPV systems.
In: Renewable Energy: An International Journal, Jg. 97 (2016-11-01), S. 689-696
Online
academicJournal
Zugriff:
High concentration photovoltaic (HCPV) modules require a high precision tracking system for reaching their highest conversion efficiency. One way to accomplish this goal is by using a closed-loop mechanism and a sun sensor to track the sunlight. This paper proposes a cascade control algorithm capable of achieving a sun tracking error of 1′ for its application in high concentration photovoltaic systems. The algorithm follows an inner loop-outer loop topology. The inner loop employs a Nonlinear Proportional-Proportional Integral (NP-PI) controller and the outer loop resorts on a Proportional Integral (PI) controller. A tuning procedure for setting up the cascade controller is also described. Experiments on a laboratory prototype compare the performance of the proposed cascade controller with a PI controller not resorting on an inner loop. These outcomes show that the proposed control law provides improved tracking accuracy with less actuator wear. [ABSTRACT FROM AUTHOR]
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Cascade closed-loop control of solar trackers applied to HCPV systems.
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Autor/in / Beteiligte Person: | Garrido, Ruben ; Díaz, Arturo |
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Zeitschrift: | Renewable Energy: An International Journal, Jg. 97 (2016-11-01), S. 689-696 |
Veröffentlichung: | 2016 |
Medientyp: | academicJournal |
ISSN: | 0960-1481 (print) |
DOI: | 10.1016/j.renene.2016.06.022 |
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