Implementation of Lyapunov Function-Based Hybrid Controller in Semi-Quadratic Buck-Boost Converter

Abstract

This article presents a novel Semi-Quadratic buckboost converter (SQBuBoC) designed to integrate in many applications with a wide range of output voltage such as photovoltaic systems. The efficient control and energy management of renewable-driven stand-alone systems has been areas of active research. However, effectively managing both the renewable energy source and the distributed energy stored while meeting the load requirements remains a challenge. This study focuses on evaluating the performance of a SQBuBoC with a Lyapunov function-based controller. The proposed controller employs a combination of a duty-ratio feedforward control unit and a Lyapunov function-based control unit. The duty-ratio feedforward control unit is responsible for reducing the workload on the feedback controller. By utilizing this control scheme, the closedloop system achieves exponential stability and exhibits excellent transient responsiveness, even when subjected to significant disturbance. The MATLAB simulation outcomes are showcased to demonstrate and exemplify the proposed methodology.