Comparative Analysis of Average Current Mode Control and Sliding Mode Control of Bidirectional CUK Converter for BESS

^1,2 CVR College of Engineering, Department of EEE, Hyderabad, India
³ Vignana Bharathi Institute of Technology, Department of EEE, Hyderabad, India

^* Corresponding author: vimala.cvreee@gmail.com

Abstract

This paper presents a comparative study between Average Current Mode Control (ACMC) and Sliding Mode Control (SMC) in the context of a bidirectional Cuk converter powered by a solar PV input. Both control strategies are implemented to regulate the charging and discharging of a VRLA battery while ensuring stable current flow. ACMC is known for its simplicity and effectiveness in maintaining steady current, but it may struggle with system uncertainties and nonlinearities. In contrast, SMC offers robust control with finite-time convergence and insensitivity to nonlinearities, making it well-suited for managing the converter’s complex dynamics. However, SMC introduces the challenge of chattering, a high-frequency oscillation around the desired sliding surface, which can impact system performance. Through simulations and experimental validation, this study evaluates the performance of both control methods, highlighting the trade-offs between the simplicity and stability of ACMC and the robustness and complexity of SMC. The findings demonstrate the conditions under which each control strategy excels, providing insights into their respective advantages and limitations for bidirectional power converter applications.