Control algorithms applied to active solar tracking systems: A review

•The control algorithm selection of a solar tracker impacts in the tracking accuracy.•The closed-loop control is the most used strategy in solar tracking systems.•The on–off control algorithm is the most used algorithm in solar tracking systems.•Proposal for alternative classification of control alg...

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Veröffentlicht in:Solar energy Jg. 212; S. 203 - 219
Hauptverfasser: Fuentes-Morales, Rosa F., Diaz-Ponce, Arturo, Peña-Cruz, Manuel I., Rodrigo, Pedro M., Valentín-Coronado, Luis M., Martell-Chavez, Fernando, Pineda-Arellano, Carlos A.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York Elsevier Ltd 01.12.2020
Pergamon Press Inc
Schlagworte:
Active control
Actuators
Algorithms
Closed-loop
Control algorithm
Control algorithms
Electric motors
Energy consumption
Energy conversion
Energy conversion efficiency
Fuzzy logic
Hybrid-loop
Open-loop
Photovoltaic cells
Photovoltaics
Proportional integral derivative
Solar energy
Solar power
Solar tracking
Tracking control
Tracking systems
Solar tracking
Control algorithm
Hybrid-loop
Closed-loop
Open-loop
ISSN:0038-092X, 1471-1257
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Zusammenfassung:•The control algorithm selection of a solar tracker impacts in the tracking accuracy.•The closed-loop control is the most used strategy in solar tracking systems.•The on–off control algorithm is the most used algorithm in solar tracking systems.•Proposal for alternative classification of control algorithms for solar trackers.•IEC 62817 standard is required for the validation of the solar trackers’ performance. It is well known that concentrating solar power and concentrating photovoltaic technologies require high accuracy and high precision solar tracking systems in order to achieve greater energy conversion efficiency. The required tracking precision depends primarily on the acceptance angle of the system, which is generally tenths of a degree. Control algorithms applied to active solar tracking systems command and manipulate the electrical signals to the actuators, usually electric motors, with the goal of achieving accurate and precise solar tracking. In addition, a solar tracking algorithms system must provide robustness against disturbances, and it should operate with minimum energy consumption. In this work, a systematic review of the control algorithms implemented in active solar tracking systems is presented. These algorithms are classified according to three solar tracking control strategies: open-loop, closed-loop and combined open- and closed-loop schemes herein called hybrid-loop. Their working principles as well as the main advantages and disadvantages of each strategy are analyzed. It is concluded that the most widely used solar tracking control strategy is closed-loop, representing 54.39% of all the publications consulted. On–off, fuzzy logic, proportional-integral-derivative and proportional-integral are the control algorithms most applied in active solar tracking systems, representing 57.02%, 10.53%, 6.14% and 4.39%, respectively.
Bibliographie:ObjectType-Article-1
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content type line 14
ISSN:0038-092X
1471-1257
DOI:10.1016/j.solener.2020.10.071