Pseudo-Azimuthal Dual-Axis Solar Tracking Technique Using the Hourly Method for Photovoltaic Modules

Miotto, Maicon; Gonzatti, Frank; Franchi, Diogo; Silva, Emerson I. da; Farret, Felix A.

doi:10.1007/s40313-021-00721-0

Cited by 6 publications

(1 citation statement)

References 9 publications

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“…In order to improve the efficiency of PV system, various methods of sun tracking have been used in PV systems, which includes sensorless tracking, sensor-based tracking, and hybrid tracking. The sensorless tracking method generally uses astronomic equations to determine the position of the sun [4][5][6], then drives the PV panels towards the sun. The sensorless tracking method does not use the additional tracking sensor, and although it has advantages in cost, the tracking accuracy is low.…”

Section: Introductionmentioning

confidence: 99%

Development and performance test of a novel solar tracking sensor

Lan

2023

Metrology and Measurement Systems

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A new solar tracking sensor based on image recognition is proposed and designed to solve the problem of low accuracy of photoelectric tracking in photovoltaic power generation. The sensor can directly output its angular deviation from the sun, and its mechanical structure and working principle are analysed in detail. We use a high-precision camera to collect the image of the two slots on the projector surface and use the Hough transform to identify the image of the light seam. After obtaining the linear equation for the two slots, the coordinate of the intersection point is found, and the calculation of the solar altitude and azimuth can be realized. We have improved the Hough transform scheme by using the skeleton image of the slots instead of the edge image. The improvement of the scheme has been proved to effectively improve the detection accuracy. A calibration test board is used to test the sensor and experimental results show that the scheme can achieve the measurement of azimuth and altitude with the accuracy of be 0.05°, which can meet the detection accuracy requirements of the solar tracking in photovoltaic power generation and many other photoelectric tracking implementations.

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Section: Introductionmentioning

confidence: 99%

Development and performance test of a novel solar tracking sensor

Lan

2023

Metrology and Measurement Systems

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Theoretical and practical study of the behavior of partially shaded photovoltaic modules

Moro,

Franchi,

Gonzatti

et al. 2024

Energy Syst

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An Experimental Study on the Angular Step of One-Axis PV Trackers and Its Impact on Energy Harvesting

Franchi

Gonzatti

Miotto

et al. 2022

J Control Autom Electr Syst

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The photovoltaic module position related to the Sun greatly affects its power production due to the latter being dependent on the irradiation incidence. One-axis trackers are used to physically move the modules so they follow the Sun's daily trajectory and hence increase energy harvesting. This paper investigates how relevant the actuating angular step of a one-axis tracker is concerning the daily and annual energy photovoltaic energy production. An east-west rotational axis with a fixed tilt angle is experimentally analyzed with four different steps: 2°, 5°, 10°, and 30°angular movements. Results are obtained over 1 year and compared to the energy production of a fixed mount photovoltaic module. Only a maximum difference of 1.68% is observed between the tracking strategies. The sky's condition is also considered, where clear or mostly clear days (60.9% of the analyzed period) contributed to 78.8% of energy production.

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Pseudo-Azimuthal Dual-Axis Solar Tracking Technique Using the Hourly Method for Photovoltaic Modules

Cited by 6 publications

References 9 publications

Development and performance test of a novel solar tracking sensor

Development and performance test of a novel solar tracking sensor

Theoretical and practical study of the behavior of partially shaded photovoltaic modules

An Experimental Study on the Angular Step of One-Axis PV Trackers and Its Impact on Energy Harvesting

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