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Article

New Control Scheme for Solar Power Systems under Varying Solar Radiation and Partial Shading Conditions

1
Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
2
Undergraduate Program of Vehicle and Energy Engineering, National Taiwan Normal University, Taipei 106, Taiwan
3
Department of Electrical Engineering, National Chin-Yi University of Technology, Taichung 411, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editor: Paola Ammendola
Processes 2021, 9(8), 1359; https://doi.org/10.3390/pr9081359
Received: 4 July 2021 / Revised: 23 July 2021 / Accepted: 29 July 2021 / Published: 2 August 2021
(This article belongs to the Special Issue Application of Power Electronics Technologies in Power System)
The traditional perturbation and observation (P&O) maximum power point tracking (MPPT) algorithm of a structure is simple and low-cost. However, the P&O algorithm is prone to divergence under solar radiation when the latter varies rapidly and the P&O algorithm cannot track the maximum power point (MPP) under partial shading conditions (PSCs). This study proposes an algorithm from the P&O algorithm combined with the solar radiation value detection scheme, where the solar radiation value detection is based on the solar photovoltaic (SPV) module equivalent conductance threshold control (CTC). While the proposed algorithm can immediately judge solar radiation, it also has suitable control strategies to achieve the high efficiency of MPPT especially for the rapid change in solar radiation and PSCs. In the actual test of the proposed algorithm and the P&O algorithm, the MPPT efficiency of the proposed algorithm could reach 99% under solar radiation, which varies rapidly, and under PSCs. However, in the P&O algorithm, the MPPT efficiency was 96% under solar radiation, which varies rapidly, while the MPPT efficiency was only 80% under PSCs. Furthermore, in verifying the experimental results, the proposed algorithm’s performance was higher than the P&O algorithm. View Full-Text
Keywords: solar photovoltaic module; conductance threshold control; partial shading conditions solar photovoltaic module; conductance threshold control; partial shading conditions
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MDPI and ACS Style

Jana, A.-S.; Liu, H.-D.; Lu, S.-D.; Lin, C.-H. New Control Scheme for Solar Power Systems under Varying Solar Radiation and Partial Shading Conditions. Processes 2021, 9, 1359. https://doi.org/10.3390/pr9081359

AMA Style

Jana A-S, Liu H-D, Lu S-D, Lin C-H. New Control Scheme for Solar Power Systems under Varying Solar Radiation and Partial Shading Conditions. Processes. 2021; 9(8):1359. https://doi.org/10.3390/pr9081359

Chicago/Turabian Style

Jana, Anindya-Sundar, Hwa-Dong Liu, Shiue-Der Lu, and Chang-Hua Lin. 2021. "New Control Scheme for Solar Power Systems under Varying Solar Radiation and Partial Shading Conditions" Processes 9, no. 8: 1359. https://doi.org/10.3390/pr9081359

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