Abstract
This paper presents a hybrid maximum power point tracking (MPPT) method to detect the global maximum power point (GMPP) under partially shaded conditions (PSCs), which have more complex characteristics with multiple peak power points. The hybrid method can track the GMPP when a partial shadow occurs either before or after acquiring the MPP under uniform conditions. When PS occurs after obtaining the MPP during uniform conditions, the new operating point should be specified by the modified linear function, which reduces the searching zone of the GMPP and has a significant effect on reducing the reaching time of the GMPP. Simultaneously, the possible MPPs are scanned and stored when shifting the operating point to a new reference voltage. Finally, after determining the possible location of the GMPP, the GMPP is obtained using the modified P&O. Conversely, when PS occurs before obtaining the MPP, the referenced MPP should be specified. Thus, after recognizing the possible location of the GMPP, the modified P&O can be used to obtain the GMPP. The simulation and experimental implementations for the proposed algorithm are performed with different scenarios of shadowing under different irradiations, which clearly indicate that the proposed method is robust and has a fast tracking speed. Moreover, this work presents the load sizing method for PSCs to avoid controller failure when detecting the GMPP. Additionally, in this paper, the user-friendly method for programming the digital signal processing (DSP) via Simulink/MATLAB is presented in detail.
Highlights
Electricity is a serviceable form of energy that can be obtained from different energy resources that can be renewable or non-renewable
A new approach for finding the global maximum power point (GMPP) under partially shaded conditions (PSCs) has been proposed based on a new hybrid method that can detect the GMPP when a partial shadow occurs either after or before achieving the maximum power point (MPP) under uniform conditions
When a shadow occurs after obtaining the MPP under uniform conditions, the new operating point should be defined by using the modified linear function
Summary
Electricity is a serviceable form of energy that can be obtained from different energy resources that can be renewable or non-renewable. The authors in [34] presents a linear function method, where the first MPPT obtained after transferring the operating point is considered as the GMPP. To have better performance in terms of tracking time for the GMPP and the oscillation in power, a novel hybrid technique is presented in this paper. In the to particular situations of occurs shadowing can track the GMPP all of the scenariosthe and in proposed technique, if PS after and acquiring the MPP duringinuniform conditions, modified different irradiations. If PS occurs after acquiring the MPP during uniform linear function [37] needs to compute the new reference operating point.
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