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Energies 2018, 11(7), 1826; https://doi.org/10.3390/en11071826

A New Maximum Power Point Tracking (MPPT) Algorithm for Thermoelectric Generators with Reduced Voltage Sensors Count Control

1
Energy Engineering Department, German Jordanian University, Amman 11180, Jordan
2
Department of Electrical Engineering, University of Engineering and Technology, Lahore 54890, Pakistan
This paper is an extended version of our paper published in: Zakariya M. Dalala, Zaka Ullah Zahid. “New MPPT algorithm based on indirect open circuit voltage and short circuit current detection for thermoelectric generators”, 2015 IEEE Energy Conversion Congress and Exposition (ECCE), 2015, also presented at 2016 IEEE International Energy Conference (ENERGYCON), 2016.
*
Author to whom correspondence should be addressed.
Received: 15 June 2018 / Revised: 9 July 2018 / Accepted: 10 July 2018 / Published: 12 July 2018
(This article belongs to the Special Issue Power Electronics in Renewable Energy Systems)
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Abstract

This paper proposes a new maximum power point tracking (MPPT) algorithm for thermoelectric generators (TEG). The new-presented method is based on implementing an indirect open circuit voltage detection and short circuit current estimation methods, which will be used to directly control the TEG interface power converter, resulting in reaching the maximum power point (MPP) in minimal number of steps. Two modes of operation are used in the proposed algorithm, namely the perturb and observe (P&O) method for fine-tuning and the transient mode for coarse tracking of the MPP during fast changes that occur to the temperature gradient across the structure. A novel voltage sensing technique as well is proposed in this work, to reduce the number of voltage sensors used to control and monitor the power converter. The proposed strategy employs a novel approach to sense two different voltages using the same voltage sensor. The input and output voltage information is collected from an intermediate point in the converter. The reconstructed voltages are used in the control loops as well as for monitoring the battery output or load voltages. Simulation and experimental results are provided to validate the effectiveness of the proposed algorithm and the sensing technique. View Full-Text
Keywords: maximum power point tracking; open circuit voltage; perturb and observe; thermoelectric generator maximum power point tracking; open circuit voltage; perturb and observe; thermoelectric generator
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Dalala, Z.M.; Saadeh, O.; Bdour, M.; Zahid, Z.U. A New Maximum Power Point Tracking (MPPT) Algorithm for Thermoelectric Generators with Reduced Voltage Sensors Count Control . Energies 2018, 11, 1826.

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