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Abstract
This paper proposes an improved Wind Turbine Emulator (WTE) structure using Sliding Mode Control (SMC) technique based on the Two-Phase Induction Motor (TPIM) for software simulation laboratory purposes. Since the power electronic converters application with various control strategies in the AC machine drive field facilitates the wind turbine characteristics imitation, an advanced SVM controlled-2ϕ-inverter is adopted. Considering the asymmetry between the TPIM main and auxiliary windings, mathematical equations were studied allowing control of the speed and the torque under different conditions. The 2-phase-inverter is controlled through an appropriate adjustment of four space voltage vectors. In order to enhance the speed and flux regulation loops and to increase the system robustness against the motor parameters variation and the wind sudden fluctuations, the SMC theory, which contains the adaptive rotor flux observer is used here to develop a control law that governs the system to track the reference speed set by the WT mathematical model to obtain the desired output. Several parameters, such as electromagnetic torque, rotor fluxes, stator currents, and rotor speed, were analyzed. Static and dynamic characteristics and the WTE transient and steady-state responses are satisfactorily reproduced by the proposed emulator scheme.
Disclosure statement
No potential conflict of interest was reported by the author(s).
Additional information
Notes on contributors
Mouna Zerzeri
Mouna Zerzeri received the BE degree in electrical engineering and a master's degree in intelligent systems and communication from the National Engineering School of Sousse, University of Sousse, Tunisia, in 2014. Currently, she is a research scholar at the Laboratory of Advanced Technology and Intelligent Systems, National Engineering School of Sousse, University of Sousse. Her fields of interest are control system design related to converters for AC drives, variable speed traction systems, electric machine drives, and nonlinear control. E-mail: [email protected]
Intissar Moussa
Intissar Moussa received the BE degree in industrial electronic engineering from the National Engineering School of Sousse, University of Sousse, Tunisia, in 2013. Currently, she is a research scholar at the Laboratory of Advanced Technology and Intelligent Systems, National Engineering School of Sousse, University of Sousse. Her research interests include renewable energy, wind/PV systems emulation, electric system control, and electric machine drives.
Adel Khedher
Adel Khedher is a professor in electrical systems in the Industrial Electronic Engineering Department of ENISO. He received the Master of Sciences and DEA degrees from ENSET, in 1991 and 1994. He recieved his PhD and HDR degrees from ENIS in 2006 and 2012. His research interests include static converters control, electric machine drives, renewable energy systems and smart grid. E-mail: [email protected]