NDLI: Analysis for step-size optimisation on MPPT algorithm for photovoltaic systems

Content Provider	IET Digital Library
Author	Tang, Lei Xu, Wei Mu, Chaoxu
Abstract	As the output characteristic of photovoltaic arrays is a non-linear function of external environment, the step-size of maximum power point tracking (MPPT) algorithm should be regulated dynamically to improve the MPPT efficiency. However, the step-size, essentially determining the performance of MPPT algorithm, is often designed for a particular system with certain working conditions. To solve this problem, an optimisation algorithm is proposed in this study, which can adjust the step-size automatically. From the essence of optimisation problem, the tracking process can be converted into a maximum sequence which can be solved by several iteration algorithms. This study provides a simple and effective way to obtain the step-size. Once the iteration method is selected, the performance of the MPPT algorithm has been decided. The analysis of convergence, convergence order and stability are presented in this study. Comprehensive simulation and experimental results demonstrate that this proposed algorithm has a good stable and dynamic characteristic.
Starting Page	1647
Ending Page	1654
Page Count	8
ISSN	17554535
Volume Number	10
e-ISSN	17554543
Issue Number	Issue 13, Oct (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/10/13
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2016.0981
Journal	IET Power Electronics
Publisher Date	2017-06-19
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Convergence Convergence Order Interpolation And Function Approximation Iteration Algorithm Iterative Method Maximum Power Point Trackers Maximum Power Point Tracking Algorithm MPPT Algorithm Numerical Analysis Optimisation Optimisation Technique Photovoltaic Array Photovoltaic Power System Photovoltaic System Solar Power Stations Step-size Optimisation
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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