Application of fuzzy logic-based MPPT technique for harvesting the heat energy dissipated by the wind generator stator w
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ORIGINAL ARTICLE
Application of fuzzy logic-based MPPT technique for harvesting the heat energy dissipated by the wind generator stator windings to power single-phase AC grid systems Rakesh Thankakan1 • Edward Rajan Samuel Nadar1 Received: 30 July 2019 / Accepted: 14 March 2020 Springer-Verlag London Ltd., part of Springer Nature 2020
Abstract The proposed research work investigates a thermoelectric energy harvester system for generating electricity from waste heat dissipated through the wind generator stator windings to feed a single-phase AC grid. Since the wind velocity is changing at every instant, a dynamic analysis is carried out under varying temperature conditions. A single thermoelectric module (TEM) can generate low power in the range of a few watts. To increase the power, the TEMs can be connected in square series–parallel configuration, as it has the benefit of non-varying internal resistance value. To operate the TEMs at maximum power under varying temperature conditions, the maximum power point tracking (MPPT) needs to be carried out to match the internal resistance of the TEM array with the load resistance. A fuzzy logic-based MPPT technique is employed during this work, in view that it is adaptive, robust and respond rapidly under varying temperature conditions. The change in accuracy of fuzzy logic-based MPPT controller in terms of maximum power point is found to be 95.18% to 99.24%. To feed the generated power to the single-phase AC grid, a DC–DC boost converter with controller and inverter is essential. A proportional integral (PI) controller is simple to implement and can provide an inverter with a constant DC voltage. A sine pulse width modulation (SPWM) inverter is employed in this work that has the capability of producing an appropriate voltage and frequency for interconnecting the system to AC grid. The entire system was developed and analysed using MATLAB-Simulink. Keywords Energy harvesting system Thermoelectric generator DC–DC boost converter Fuzzy logic-based MPPT technique PI controller Inverter Single-phase AC grid
1 Introduction Thermoelectric generator (TEG) is a compact device, which can be used for the generation of electrical energy from waste heat energy using the principle of Seebeck effect [1, 2]. It has a major advantage of no pollutant emission, noiseless operation due to no moving parts [3] and clean [4] power source. TEG is made with large
& Edward Rajan Samuel Nadar [email protected] Rakesh Thankakan [email protected] 1
Department of Electrical and Electronics Engineering, Mepco Schlenk Engineering College (Autonomous), Sivakasi, Tamilnadu 626005, India
number of series-connected thermocouples. Until 1950s, the use of TEG has been restricted to fields such as military, space applications [5–9] and medical [10], because of high cost and low efficiency of around 5%. However, nowadays researchers are motivated to search an alternative method to generate electrical energy due to increase in cost of energ
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