Modeling, Design & Control of RLBC Converter

Voltage regulation of DC-DC converters is a prime requirement in any DC power application. The use of various frequency-dependent elements, variation in inputs, particularly converters integrated with renewable energy sources (RES), and load variations affect the desired output. Therefore, close loop control of converters becomes essential. However, to design robust controller knowledge of converter dynamics, including transient and steady-state, is necessary. This paper presents detailed dynamic modelling of the Re-lift Luo buck converter (RLBC) using the average state-space modelling method. The RLBC converter can provide step-up and step-down output simultaneously. The integrated converter (RLBC) has many energy storage elements, making it a higher-order system. Controller and simulation of a higher-order system are complex and time-consuming. Therefore, reduced order models are obtained using pad' e approximation. Further, a suitability analysis of controllers is carried out using stability boundary theory. Therefore, a robust, suitable intelligent fuzzy controller is designed for RLBC converter with a detailed analysis of converters. The study is verified through simulation in MatLab Simulink. Finally, it is believed that the analysis carried out in this study could be helpful for higher-order boost converters controllers design.