Nonsingular Terminal Sliding Mode Control for a Variable Speed Wind Turbine System using Face Mock-Up Interface co-simulation

Abstract

This paper proposes a new type of Nonsingular Terminal Sliding Mode Controller (NTSMC) for a variable speed Horizontal-Axis Wind Turbine (HAWT) with a direct drive Radial Flux Permanent Magnet Generator (RFPMG). In order to have more accuracy in the dynamic models, both HAWT and RFPMG are simulated using Computational Fluid Dynamics and 3D Finite Element Method in Ansys CFX and Ansys Maxwell 3D respectively. Then, a Face Mock-Up Interface (FMI) is set up for both models which were coupled in Ansys Twin Builder. Finally, the NTSMC is applied on the DC side through a Boost Converter in order to have a less complex control algorithm which can be easily implemented on a microcontroller. Simulation Results show the performance of the proposed method and comparisons with conventional controllers in order to demonstrate its robustness and fast response.