Variable Structure Control by Discontinuous versus Continuous Signal in a DFIG

Abstract

This paper introduces a control strategy for effectively managing the active and reactive power of a double-feed induction generator (DFIG) by employing a Variable Structure Control by Continuous Signal (VSC-CS). Unlike Variable Structure Control by Discontinuous Signal (VSC-DS), which suffers from the undesirable chattering effect caused by the abrupt control signal changes along the sliding surface, the proposed VSC-CS technique mitigates this issue while maintaining the robustness to DFIG parametric variations offered by the VSC-DS approach. To validate the effectiveness of the VSC-CS control approach, extensive simulations using MATLAB/Simulink software demonstrate substantial improvements in power quality and a significant reduction in chattering phenomenon.

Keywords

• dfig
• vsc-cs
• vsc-ds
• nonlinear control