TITLE:
UDE-Based Robust Nonlinear Control of the Boost Converter with Constant Power Load
AUTHORS:
Said Oucheriah, Abul Azad
KEYWORDS:
Boost Converter, Robust Control, Constant Power Load (CPL), Uncertainty and Disturbance Estimator (UDE)
JOURNAL NAME:
Circuits and Systems,
Vol.15 No.5,
May
31,
2024
ABSTRACT: The boost converter feeding a constant power load (CPL) is a non-minimum phase system that is prone to the destabilizing effects of the negative incremental resistance of the CPL and presents a major challenge in the design of stabilizing controllers. In this work, a robust nonlinear controller based on the uncertainty and disturbance estimator (UDE) scheme is successfully developed to tightly regulate the output voltage of the boost converter. A systematic procedure is developed to select the controller gains to achieve a satisfactory output response. Using simulation, the effectiveness of the proposed controller is validated and compared to a recent robust nonlinear controller.