2019 | vol. 67 | nr. 3 | art. 4

Performance of Optimal Fractional Order PI Controller for MPPT-Pitch Control of a Wind Turbine using the Bat Algorithm

Maroufi Oussama, Abdelghani Choucha, Lakhdar Chaib
The controller efficiency is an essential part for wind turbine system control. However, due to the nonlinearity of wind turbine model and the difficult wind velocity profiles, it needs a competitive controller with high performance. On the other hand, it is complex task to get the optimal values of controllers. This paper presents a robust controller based on Fractional Order PI (FOPI) controller design for controlling the variable pitch wind turbine (WT) equipped with Permanent Synchronous generator (PMSG). The optimal FOPI controller parameters are achieved using a new metaheuristic optimisation technique called Bat Algorithm (BA). The control objectives are to achieve the maximum power point (MPPT) in low speed region  and avoid the damage of wind turbine in high wind speed cases. The robustness of proposed controller design is analysed through several simulations for different wind speed profiles and compared with classical PI controller. The results show clearly that the optimal FOPI controller has the superiority than counterpart classical PI controller in terms of performance indices, which is an Integral absolute error (IAE) as well overshoots and setting time. Besides, the PMSG-WT system is effectively controlled at different operating conditions by the proposed strategy.
Keywords: Wind Turbine; PMSG; MPPT; Pitch angle; PI controller; Fractional Order PI controller.
To cite this article: Maroufi O., Choucha A., Chaib L “Performance of Optimal Fractional Order PI Controller for MPPT-Pitch control of a Wind Turbine using Bat Algorithm”, in Electrotehnica, Electronica, Automatica (EEA), 2019, vol. 67 no. 3, pp. 37-44, ISSN 1582-5175.