Exhaustive Comparison between Linear and Nonlinear Approaches for Grid-Side Control of Wind Energy Conversion Systems

Energies

Youssef Errami¹  Tarik Bouragba²  Damien Voyer³  Loubna Benaaouinate⁴  Hicham Medromi⁵  Younes Azelhak⁵ 

[1] Department of Physical, Faculty of Science, Chouaib Doukkali University, Avenue Jabran Khalil Jabran, El Jadida 299-24000, Grand-Casablanca, Morocco;EIGSI Casablanca, 282 Route de l’Oasis, Casablanca 20410, Morocco;EIGSI La Rochelle, 26 rue de Vaux de Foletier, CEDEX 1, 17041 La Rochelle, France;Laboratory of Energy and Electrical Systems, Hassan II University—ENSEM, Casablanca 8118, Morocco;Laboratory of Research in Engineering (LRI), System Architecture Team (EAS), Hassan II University—ENSEM, Route d’El Jadida, km 7, Oasis, Casablanca 8118, Morocco;

关键词: grid-side converter;    internal model control;    sliding mode control;    wind energy conversion system;   

DOI  :  10.3390/en14134049

来源: DOAJ

【 摘 要 】

In this paper, we propose a comparative study of linear and nonlinear algorithms designed for grid-side control of the power flow in a wind energy conversion system. We performed several simulations and experiments with step and variable power scenarios for different values of the DC-link capacity with the DC storage element being the key element of the grid-side converter. The linear control was designed on the basis of the internal model control theory where an active damping was added to avoid steady state errors. Nonlinear controls were built using first and second order sliding mode controls with theoretical considerations to ensure accuracy and stability. We observed that the first order sliding mode control was the most efficient algorithm for controlling the DC-link voltage but that the chattering degraded the quality of the energy injected into the grid as well as the efficiency of the grid-side converter. The linear control caused overshoots on the DC-link voltage; however, this algorithm had better performance on the grid side due to its smoother control. Finally, the second order sliding mode control did not prove to be more robust than the other two algorithms. This can be explained by the fact that this control is theoretically more sensitive to converter losses.

【 授权许可】

Unknown