Issam Bekki, Fatima Ez-zahra Lamzouri, Aumeur El Amrani, and El-Mahjoub Boufounas
Thermoelectric generator (TEG) system, DC–DC boost converter, maximum power point tracking (MPPT), backstepping control, backstepping sliding-mode control (BSMC)
This study investigates a control strategy for increasing maximum power generation efficiency of a thermoelectric generator (TEG) system. Then, to get the aim of maximising the power from the TEG system, an original maximum power point tracking controller based on backstepping sliding mode control (BSMC) method is designed. The considered system contains five series thermoelectric modules connected to a resistive load through a boost converter. Thus, the main objective of the developed method is to force the TEG system to operate to its required maximum power point by adjusting the boost converter duty cycle, under sudden change in temperature. Moreover, the designed controller combines the both techniques advantages, and that by improving the robustness of backstepping along with reducing the chattering behaviour of sliding-mode control around the maximum power point. Finally, the simulation results, illustrated to present the effectiveness and the feasibility of the developed control scheme, show that the proposed BSMC technique offers higher response speed, a lesser stable-state error, and a fast feedback against varying temperature conditions, compared to others conventional methods.
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