Dual Search Maximum Power Point (DSMPP) Algorithm Based on Mathematical Analysis under Shaded Conditions

Abstract

Photovoltaic (PV) systems represent a clean, renewable source of energy that has non-linear current-voltage (I-V) and power-voltage (P-V) characteristics. To increase the efficiency, a PV system must operate at the maximum power point (MPP) to produce the maximum available power. Under uniform conditions, there is only a single MPP in the P-V curve of a PV system; however, determining the MPP is more complicated under partially shaded conditions (PSCs) because multiple peak power points exist. In recent years, various studies have been performed to obtain the highest peak power point under PSCs, which is referred to as the global maximum power point (GMPP). In this paper, a novel method based on mathematical analysis that reduces the search zone and simultaneously identifies the possible MPPs in the specified zone is proposed; this proposed method is called the dual search maximum power point (DSMPP) algorithm. To evaluate the effectiveness of the proposed method, simulation and hardware implementations are carried out. The results show that the search time of GMPP is significantly reduced and the GMPP is detected in the minimum amount of time with high accuracy and minimum oscillation in the power produced. OPEN ACCESSEnergies 2015, 8 12117

Implementing a Novel Hybrid Maximum Power Point Tracking Technique in DSP via Simulink/MATLAB under Partially Shaded Conditions

“…In the proposed method, the proved idea [37] that the GMPP cannot be located at the right side of the new reference voltage is used. In [37], a modified linear function was presented which calculates the new reference voltage when PS happens to reduce the search zone from the left side of the P-V curve and, simultaneously, the controller starts to scan the possible MPPs at the right side of the P-V curve. In this case, the both side of the GMPP are considered at the same time by limiting the search zone and simultaneously scanning from right to left.…”

“…Furthermore, when the operating point is near possible MPPs, the smaller value is considered for d to prevent the controller from missing the MPPs. In this method, as explained in [37] in detail, some important notes are considered. The first note is that under PSCs with multi peak powers in the P-V curve, the values of other MPPs are decreased on both sides of the GMPP when the GMPP is achieved.…”

“…The energy obtained by virtue of a PV system is commercially shadowing and can track the GMPP in all of the scenarios and also in different irradiations. In the proposed technique, if PS occurs after acquiring the MPP during uniform conditions, the modified linear function [37] needs to compute the new reference operating point. Then, the conceivable MPPs are sought at the right side of the new operating point, which reduces the searching time of GMPP.…”

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Analytical Study of the Electrical Output Characteristics of c-Si Solar Cells by Cut and Shading Phenomena

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