Certainty equivalence-based robust sliding mode control strategy and its application to uncertain PMSG-WECS

Chand, Annas; Khan, Qudrat; Alam, Waqar; Khan, Laiq; Iqbal, Jamshed

Abstract

This work focuses on maximum power extraction via certainty equivalence-based robust sliding mode control protocols for an uncertain Permanent Magnet Synchronous Generator-based Wind Energy Conversion System (PMSG-WECS). The considered system is subjected to both structured and unstructured disturbances, which may occur through the input channel. Initially, the PMSG-WECS system is transformed into a Bronwsky form, i.e., controllable canonical form, which is composed of both internal and visible dynamics. The internal dynamics are proved stable, i.e., the system is in the minimum phase. However, the control of visible dynamics, to track the desired trajectory, is the main concern. To carry out this task, the certainty equivalence-based control strategies, i.e., conventional sliding mode control, terminal sliding mode control and integral sliding mode control are designed. Consequently, a chattering phenomenon is suppressed by the employment of equivalent estimated disturbances, which also enhance the robustness of the proposed control strategies. Eventually, a comprehensive stability analysis of the proposed control techniques is presented. All the theoretical claims are verified via computer simulations, which are performed in MATLAB/Simulink.

Citation

Chand, A., Khan, Q., Alam, W., Khan, L., & Iqbal, J. (2023). Certainty equivalence-based robust sliding mode control strategy and its application to uncertain PMSG-WECS. PLoS ONE, 18(2), Article e0281116. https://doi.org/10.1371/journal.pone.0281116

• Journal Article Type: Article
• Acceptance Date: Jan 15, 2023
• Online Publication Date: Feb 27, 2023
• Publication Date: Feb 27, 2023
• Deposit Date: Mar 10, 2023
• Publicly Available Date: Mar 13, 2023
• Journal: PloS one
• Print ISSN: 1932-6203
• Electronic ISSN: 1932-6203
• Publisher: Public Library of Science
• Peer Reviewed: Peer Reviewed
• Volume: 18
• Issue: 2
• Article Number: e0281116
• DOI: https://doi.org/10.1371/journal.pone.0281116
• Public URL: https://hull-repository.worktribe.com/output/4234303