scholarly journals Sensorless iterative solar tracking in multiple on-grid photovoltaic generators with improved tracking strategy

2011 ◽  
pp. 818-823
Author(s):  
Guilherme F. Cittolin ◽  
Jéssica V. Mazuroski ◽  
Rafael C. Gonçalves ◽  
Marcel G. Kroetz ◽  
Carlo A.Z. Pece ◽  
...  
Keyword(s):  
Solar Tracking ◽  
Photovoltaic Generators ◽  
Tracking Strategy

Open-loop solar tracking strategy for high concentrating photovoltaic systems using variable tracking frequency

2016 ◽  
Vol 117 ◽  
pp. 142-149 ◽  
Author(s):  
Zhe Mi ◽  
Jikun Chen ◽  
Nuofu Chen ◽  
Yiming Bai ◽  
Rui Fu ◽  
...  
Keyword(s):  
Open Loop ◽  
Photovoltaic Systems ◽  
Solar Tracking ◽  
Tracking Strategy

Optimal solar tracking strategy to increase irradiance in the plane of array under cloudy conditions: A study across Europe

Solar Energy ◽  
2018 ◽  
Vol 163 ◽  
pp. 122-130 ◽  
Author(s):  
J. Antonanzas ◽  
R. Urraca ◽  
F.J. Martinez-de-Pison ◽  
F. Antonanzas
Keyword(s):  
Solar Tracking ◽  
Tracking Strategy

scholarly journals An Improved Sunflower-Inspired Solar Tracking Strategy for Maximizing Photovoltaic Panel Power Generation

2019 ◽  
Vol 8 (2) ◽  
pp. 1756-1762
Keyword(s):  
Power Generation ◽  
Tracking Error ◽  
Fine Tuning ◽  
Tracking Performance ◽  
Stepper Motor ◽  
Motor Current ◽  
Solar Tracking ◽  
Current Consumption ◽  
The Impact ◽  
Tracking Strategy

A previous study proposed a nature-inspired tracking strategy that mimics the solar tracking behavior of sunflowers driven by the light stimulus and the circadian clock. The approach delivered a good tracking performance with an average tracking error of 0.727° under clear, partly cloudy, and cloudy conditions. However, it incurred high tracking errors caused by false detection brought about by the abrupt changes in the amount of solar radiation during realignment. In addition, the scheme also maintained high stepper motor current consumption due to the use of a fixed stepping resolution. To address these issues, the previous tracking routine was modified to direct the search for the sun’s position to a range of calculated altitude angles where a fine-tuning process will be performed using current measurements and the adoption of a variable stepping resolution during panel reorientation. Experiments were conducted to measure the performance of the modifications in terms of tracking error, power generation, and stepper motor current consumption. A comparison of the performances between the previous and the modified approaches was done to assess the impact of the proposed improvement. The result of the comparison showed that the modifications significantly improved the overall tracking performance of the strategy.

scholarly journals Influence of Solar Position Calculation Methods Applied to Horizontal Single-Axis Solar Trackers on Energy Generation

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3826
Author(s):  
Karen Barbosa de Melo ◽  
Hugo Soeiro Moreira ◽  
Marcelo Gradella Villalva
Keyword(s):  
Energy Generation ◽  
Energy Conversion Efficiency ◽  
Photovoltaic Systems ◽  
Critical Factors ◽  
Calculation Methods ◽  
Photovoltaic Panels ◽  
Solar Tracking ◽  
Photovoltaic Plants ◽  
Solar Position ◽  
Tracking Strategy

Photovoltaic systems have been explored as a solution to meet the growing demand for electricity from a clean and renewable source. However, the low energy conversion efficiency of photovoltaic panels is one of the critical factors that hinder the competitiveness of this energy source concerning the others. An effective way to improve the efficiency of photovoltaic systems is by using solar trackers. The tracking strategy most used in photovoltaic plants employs algorithms to calculate the Sun position. This work presents energy generation estimation applying six algorithms in horizontal single-axis solar tracking: the Solar Position Algorithm (SPA) and Grena 1–5 algorithms. The aim is to evaluate the influence of these algorithms on energy generation. For all simulated locations, comparing to an ideal scenario, the SPA presented the best energy generation results. However, the other algorithms showed negligible differences between themselves, which allows us to conclude that any of the algorithms can be used without implying significant energy losses. Thus, Grena 1–2 can be highlighted for easier implementation.

scholarly journals Study of the Dependence of Solar Radiation Regarding Design Variables in Photovoltaic Solar Installations with Optimal Dual-Axis Tracking

2021 ◽  
Vol 11 (9) ◽  
pp. 3917
Author(s):  
Francisco Javier Gómez-Uceda ◽  
Isabel Maria Moreno-Garcia ◽  
Álvaro Perez-Castañeda ◽  
Luis Manuel Fernández-Ahumada
Keyword(s):  
Solar Radiation ◽  
Predictive Values ◽  
Geometric Shapes ◽  
Coverage Ratio ◽  
Rotation Axes ◽  
Design Variables ◽  
Solar Tracking ◽  
Exhaustive Study ◽  
Dual Rotation ◽  
Tracking Strategy

Solar tracking is an efficient strategy to increase the radiative capture of photovoltaic collectors. Within the multiple efforts made in recent decades to improve the production of these facilities, various works have studied solutions to optimize the number of rotation axes (single or dual rotation axes), the degree of collector coverage, the distances between trackers, the geometric arrangement of trackers or the minimization of shading between collectors. However, although in this type of installation it is common to find collectors with geometric shapes other than rectangles, no studies on the influence of the shape of the collectors on the radiative incidence are found in the literature. In this connection, the present work systematically addresses the study of incident solar radiation in photovoltaic installations with dual-axis trackers with collectors of different geometric shapes. By means of the exhaustive study, the conclusion is drawn that, for dual-axis photovoltaic installations with an optimal tracking strategy, the main variables that influence the annual radiative incidence are the spacing between collectors, the coverage ratio (GCR), and the collector surface, while the type of arrangement of collectors and the shape of these do not show predictive values.

Performansi aktual modul photovoltaik dengan pengarah matahari

2018 ◽  
Vol 12 (2) ◽  
pp. 98 ◽  
Author(s):  
Jalaluddin . ◽  
Baharuddin Mire
Keyword(s):  
Solar Radiation ◽  
Local Time ◽  
Performance Characteristic ◽  
Electrical Energy ◽  
Photovoltaic Module ◽  
Experiment Data ◽  
Actual Performance ◽  
Pv Module ◽  
Solar Tracking ◽  
Pv Modules

Actual performance of photovoltaic module with solar tracking is presented. Solar radiation can be converted into electrical energy using photovoltaic (PV) modules. Performance of polycristalline silicon PV modules with and without solar tracking are investigated experimentally. The PV module with dimension 698 x 518 x 25 mm has maximum power and voltage is 45 Watt and 18 Volt respectively. Based on the experiment data, it is concluded that the performance of PV module with solar tracking increases in the morning and afternoon compared with that of fixed PV module. It increases about 18 % in the morning from 10:00 to 12:00 and in the afternoon from 13:30 to 14:00 (local time). This study also shows the daily performance characteristic of the two PV modules. Using PV module with solar tracking provides a better performance than fixed PV module. 

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