Abstract
Photovoltaic (PV) panels are devices capable of converting solar energy to electrical without emissions generation, and can last for several years as there are no moving parts involved. The best performance can be achieved through maximum power point tracking (MPPT), which is challenging because it requires a sophisticated design, since the solar energy fluctuates throughout the day. The PV used in this research provided a low output voltage and, therefore, a boost-converter with a non-linear control law was implemented to reach a suitable end-used voltage. The main contribution of this research is a novel MPPT method based on a voltage reference estimator (VRE) combined with a fuzzy logic controller (FLC) in order to obtain the maximum power from the PV panel. This structure was implemented in a dSpace 1104 board for a commercial PV panel, PEIMAR SG340P. The scheme was compared with a conventional perturbation and observation (P&O) and with a sliding mode controller (SMC), where the outcomes demonstrated the superiority of the proposed advanced method.
Highlights
The increasing degree of pollution throughout the last decades made a change of direction in the policies of energy production, where renewables are preferred over the conventional ones
The atmospheric conditions were different because the tests had been carried out in diverse surroundings; these were shown in Figure 10, where the radiation and temperature values were higher than they were in the previous test
With regards to the PV voltage, the first feature to highlight is the chattering; this reduction is visible in Figure 12b, where the amplitude was reduced to nearly 1 V without resistance changes, which is three times less in contrast to the perturbation and observation (P&O) results
Summary
The increasing degree of pollution throughout the last decades made a change of direction in the policies of energy production, where renewables are preferred over the conventional ones. It an increment of 25% in the world energy consumption is expected for 2040, and the target is that clean ones can provide 40% of the whole production [1]. Researchers forecast that solar PV panels could generate 15% of the global demand in 2050 [2]. The switching signal can be managed by a pulse-width-modulation (PWM) generator; this implies that a suitable control law can be designed with the target of maximizing the performance of the MPPT
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