Robust Voltage Regulation of Wind Energy Conversion Systems Using Digital Sliding Mode Control

Abstract

A digital sliding mode control (DSMC) strategy stands as the core proposal of this article to control DC/DC converters used in wind turbine generator systems. The time-varying nature as well as nonlinearity of wind energy systems makes conventional linear controllers ineffective for such systems. Due to its capability of handling parameter variations and eliminating external disturbances sliding mode control functions best for wind energy systems. The paper introduces a complete mathematical depiction of wind turbine systems with DC/DC Buck converters while applying digital sliding mode control for output voltage regulation under differing wind speed conditions. A combined analysis of controlling signals with output voltage responses and error system dynamics shows the simulation results of the controller performance. The phase-plane analysis shows how the system performs under sliding motion operations while verifying its stability dynamics. System stability remains maintained by the controller throughout wind speed variations but the paper outlines specific areas for reference tracking and output voltage regulation enhancement. The study enhances knowledge of strong control methods applied to renewable energy systems by advancing optimal strategies for utilizing irregular wind power resources.