Super-Twisting Sliding Mode Output Voltage Controller for Switched Reluctance Generators in Wind Power Applications

Adequate output voltage control is essential in the integration of switched reluctance generators (SRGs) into wind energy conversion systems (WECS). In this regard, this paper proposes a discrete-time super-twisting sliding mode output voltage controller. The approach has a simple fixed-gain structure, not requiring model information or lookup tables on implementation. In order to overcome the complex task of parameter tuning, an optimization-based design approach is proposed, enabling a straightforward and systematic design stage. A two-term cost function is defined, seeking a balance between improved tracking performance and reduced chattering in the reference current value. Simulation results show the effectiveness of the proposal at output voltage regulation, while demonstrating robustness to different operating conditions.