Closed loop control of High Step-Up DC-DC Converter for Hybrid Switched-Inductor Converters

Abstract

- This paper proposes a high voltage gain dc/dc converter with coupled inductor cells and switched capacitor for renewable energy applications. It includes coupled inductor, switched capacitor and voltage multiplier cell. Switched capacitor charged during off period by using the energy stored in the coupled inductor. This will increase the performance of the converter. The voltage gain of traditional boost converter is limited, considering the issues such as the system efficiency and current ripple. First, the topological derivation of H-SLCs is deduced by combining the passive and active switched inductor unit; second, this paper illustrates the operation modes of the proposed asymmetrical and symmetrical converters; third, the performance of the proposed converters is analyzed in detail and compared with existing converters. In this paper, a new H-SLCS step up converter with closed loop control is proposed, It is analyzed, designed, simulated with MATLAB Simulink. Conventional DC-DC boost converters are not able to provide high step-up voltage gains. This paper presents transformerless dc-dc converters with closed loop control to achieve high step-up voltage gain without an extremely high duty ratio. Moreover closed loop control methodology is used for voltage drift problems.