Modified incremental conductance mppt with direct control and dual scaled adaptive step-size method

N. A. Rahim, Aamir Amir, Asim Amir, Jeyraj Selvaraj

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

8 Scopus citations


Modified Incremental Conductance algorithm utilizing adaptive variable step-size is extensively employed in PV systems. As it offers merits of fast convergence and accurate MPP detection. The computational complexities of the IncCond method have been minimized by modifying the method for a division-free algorithm. However, improper scaling of the variable step-size - change of power - restricts the performance of the method. As a constant scaling factor offers either a slow voltage response or an overshoot. Therefore, to address these shortcomings this paper offers a mIncCond MPPT with direct control and dual scaled adaptive step-size method. The proposed MPPT scheme improves the performance of the conventional IncCond method by dual scaling the change of power for an adaptive step. This dual scaling prevents any overshoot and responds sudden changes in the atmospheric conditions. The enhanced performance offers a faster-Tracking speed, accurate MPP detection, and reduced steady-state oscillation. The boost converter is utilized to prove the validity of the MPP scheme. In addition, the effects of battery load and resistive load have also been highlighted. Simulation results attained under static and dynamic conditions display the improved functionality and feasibility of the system.

Original languageEnglish
Title of host publicationIET Conference Publications
PublisherInstitution of Engineering and Technology
ISBN (Electronic)9781785611384, 9781785611889, 9781785612022, 9781785612268, 9781785612275, 9781785612381, 9781785612688, 9781785612862, 9781785612923, 9781785612947, 9781785612992, 9781785613005, 9781785613074, 9781785613449, 9781785613616, 9781785613685, 9781785613937, 9781785614064, 9781785614170, 9781785618260
ISBN (Print)9781785612381
StatePublished - 2016
Externally publishedYes
Event4th IET Clean Energy and Technology Conference, CEAT 2016 - Kuala Lumpur, Malaysia
Duration: 14 Nov 201615 Nov 2016

Publication series

NameIET Conference Publications


Conference4th IET Clean Energy and Technology Conference, CEAT 2016
CityKuala Lumpur

Bibliographical note

Publisher Copyright:
© 2016 Institution of Engineering and Technology. All rights reserved.


The authors would like to thank the financial and technical assistance provided by UM Power Energy Dedicated Advanced Centre (UMPEDAC), the Fundamental Research Grant Scheme (FP065-2014A) and Postgraduate Research Fund (PPP) Project Number: PG029-2015B.

FundersFunder number
Postgraduate Research Fund
UM Power Energy Dedicated Advanced Centre
Foundation for Fundamental Research on MatterFP065-2014A


    • Adaptive dual scaled step-size
    • Boost Converter
    • Maximum Power Point Tracking (MPPT)
    • Modified incremental conductance (mIncCond)
    • Photovoltaic (PV)


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