Comparative Analysis of Classical and Predictive Control of Bidirectional Quasi Z-Source Converter

Mohammed Tuhin Rana, Anurag Sarkar, Md. Abid, Subrata Banerjee, Kundan Kumar

Abstract: This paper presents a comparative analysis of two popular control approaches, namely, Classical Control and Model Predictive Control (MPC) applied to a bidirectional quasi Z-Source converter (qZSC). The paper describes the topology of the bidirectional quasi Z-source converter, the basic philosophy of classical control, and the basic concept of model predictive control. The small signal models of the qZSC required for design of classical controllers, and discrete predictive models of the qZSC required for the MPC are also presented in this paper. Using these models and control algorithms, the systems were simulated in Matlab/Simulink and the results were compared. The comparisons were performed on the basis of transient and steady state response, robustness to parameter variations, and harmonic content of the resultant output waveforms. The comparative analysis shows that both the approaches have certain strengths and weaknesses and one may be chosen over the other based on varieties of factors.