Design of a novel MPPT algorithm based on the two-stage searching method for PV systems under partial shading

Veerapen, Sonia, Wen, Huiqing, and Du, Yang (2017) Design of a novel MPPT algorithm based on the two-stage searching method for PV systems under partial shading. In: Proceedings of the IEEE 3rd International Future Energy Electronics Conference and ECCE Asia. pp. 1494-1498. From: IFEEC 2017 - ECCE Asia: IEEE 3rd International Future Energy Electronics Conference and ECCE Asia, 3-7 June 2017, Kaohsiung, Taiwan.

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Abstract

When photovoltaic panels are non-uniformly irradiated, they experience shadowing effect and the power against voltage curve will demonstrate multiple peaks which cause maximum power point tracking method to become challenging. A method often used to track the real peak is the two stage searching method which uses a ratio of the open circuit voltage. However, this method has some shortcomings especially at heavy shadowing condition where it can easily miss the real peak and demonstrate a slow tracking speed. Hence, a novel method to track the GMPP based on the two stage open circuit voltage method was proposed in this paper with the aim of improving the speed and accuracy of the tracker. The Simulink/SimPowerSystems environment is used to model a photovoltaic system with bypass diodes which can take both temperature and irradiance as inputs to be able to simulate different shading patterns for the implementation of the tracking algorithm. The response of the system was compared with other models proposed in previous papers to validate the system and it was found that the system could most accurately model the characteristic of the panel. Afterwards, the maximum power point tracking algorithm was tested and compared with the above-mentioned two stage searching method. It was observed that the new method was able to reach the real peak faster.

Item ID: 58393
Item Type: Conference Item (Research - E1)
ISBN: 978-1-5090-5157-1
Funders: University Teaching Development Fund (TDF)
Projects and Grants: TDF 14/15-R10-083
Date Deposited: 29 May 2019 23:40
FoR Codes: 09 ENGINEERING > 0906 Electrical and Electronic Engineering > 090608 Renewable Power and Energy Systems Engineering (excl Solar Cells) @ 100%
SEO Codes: 85 ENERGY > 8505 Renewable Energy > 850504 Solar-Photovoltaic Energy @ 100%
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