Application of modified classical numerical methods for DMPPT on Buck and Boost converters. (October 2018)

• Record Type: Journal Article
• Authors: Amir, Asim; Amir, Aamir; Seng, Che Hang; El Khateb, Ahmad; Selvaraj, Jeyraj; Rahim, N.A.
• Is Part Of: Solar energy. Volume 173(2018)
• Page Start: 437
• Page End: 448
• Publication Date: 2018-10
• Subjects: Digital maximum power point (DMPP) tracking (DMPPT) -- Classical root-finding algorithms -- Photovoltaic (PV) -- DC-DC converter topologies; Solar energy -- Periodicals; Solar engines -- Periodicals; 621.47
• DOI: 10.1016/j.solener.2018.07.088
• Languages: English
• ISSNs: 0038-092X

Abstract

Highlights: Analyse the issues of implementing DMPPT on various DC-DC converter topologies. Present Hybrid Techniques with direct control offering a combination of the MINC and different MCNM techniques. Comparatively analyse the proposed HT against the conventional MINC direct control technique. A guide for future work on DMPPT utilizing different MCNM techniques. Abstract: Application of Classical Numerical Methods (CNM) for Digital maximum power point tracking (DMPPT) confronts many issues. The issues highlighted in this paper include limited range of operation, PV array dependence and accuracy of the initial guess. In order to address such shortcomings of CNM for DMPPT, Hybrid Techniques (HT) have been proposed. The HT are a combination of the modified incremental conductance method (MINC) and various modified CNM. An overview of the considered MCNM, which are applied to the photovoltaic (PV) application, has also been provided. The HT not only address the issues confronted by the CNM, but also improve the transient response time and remove the steady state oscillations for the conventional MPPT technique. In addition, for DMPPT the DC-DC converter topology under consideration cannot be treated as a black box, by ignoring the effects of the converter topology and control dynamics. Here, a theoretical analysis has been provided to ascertain the optimum performance of DMPPT applications on various DC-DC converter designs. To measure the effectiveness of the proposed HT, Boost, 2-Stage Switch Capacitor Based (2-SSC) Boost, and Optimum Buck Converters (OBC) have been employed. Simulation and experimental results are provided to validate the effectiveness of the proposed HT.