Fractional Order Control of Multilevel Boost Converter for Photovoltoic System

V. Anil Kumar*, M. Arounassalame **
*-** Department of Electrical and Electronics Engineering, Pondicherry Engineering College, Pondicherry, India.
Periodicity:January - March'2020
DOI : https://doi.org/10.26634/jee.13.3.16773

Abstract

This paper presents a novel control scheme based on the fractional order PI controller for a high gain multilevel boost converter. Non-conventional energy resources such as solar PV cells produce DC output voltages, which are continuously change with weather conditions. It is necessary to obtain a constant DC voltage from such systems to use them for battery charging applications. The voltage gain obtained using the traditional boost converter is very limited. Switched capacitor circuit can act as a multiplier circuit and can be combined with boost converters to increase the gain. Even though the output voltage from this converter meets the requirement of high output voltage, but heavy fluctuations in the solar energy makes this system inefficient to use for battery charging applications where a constant DC voltage is required. In this paper, a control scheme is proposed for this high gain multilevel boost converter circuit using Fractional Order PI (FOPI) controller. Modeling of the high gain boost converter is required for the design of fractional order controller. A reduced order model is developed for the high gain DC-DC converter and the transfer function is obtained from this. The parameters of the FOPI controller are designed using the fractional order toolbox FOMCON. The performance of the proposed converter is compared with the conventional PI controller and the superiority of the proposed converter was proved in terms of bench mark performance measures. The simulation was carried out in MATLAB/SIMULINK and the fractional order toolbox FOMCON is used to design and simulate the FOPI controller.

Keywords

Multilevel Boost Converter, Small Signal Modeling, Fractional Order Controller, FOMCON Tool Box.

How to Cite this Article?

Kumar, V. A., & Arounassalame, M. (2020). Fractional Order Control of Multilevel Boost Converter for Photovoltoic System, i-manager's Journal on Electrical Engineering, 13(3), 16-23. https://doi.org/10.26634/jee.13.3.16773

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