Switched LC Network-Based Multistage Ultra Gain DC-DC Converter

• Published in: IEEE access Vol. 10; pp. 64701 - 64714
• Main Authors: Babu, P. Emmanuel, Vemparala, Seshagirirao, Pavithra, T., Kumaravel, S.
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 2022; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; Capacitors; Conduction losses; Control systems design; Controllers; DC-DC converter; DC-DC power converters; High gain; high voltage gain; Inductors; Photovoltaic cells; Semiconductor devices; Semiconductor diodes; switched LC network; Switches; Topology; Transformers; Voltage; Voltage converters (DC to DC); Voltage gain; Waveforms; wide bandgap devices
• ISSN: 2169-3536; 2169-3536
• DOI: 10.1109/ACCESS.2022.3183015

A multi-stage active switched inductor-capacitor network (SLCN)-based high gain DC-DC converter structure with a single switch is proposed in this paper. The idea of utilizing multiple number of SLCN networks to achieve an ultra-voltage gain is proposed. The achievement of ultra-gain helps to operate the converter at lower duty ratio. Hence, a reduction of conduction loss, improvement in efficiency and elimination of core saturation are attained in the proposed bi-quadratic converter compared to the conventional converters. The performance of a biquadratic boost converter which is formulated from the <inline-formula> <tex-math notation="LaTeX">n </tex-math></inline-formula>-stage SLCN converter for <inline-formula> <tex-math notation="LaTeX">n=2 </tex-math></inline-formula>, is analyzed. To reduce the effect of parasitic elements of the semiconductor devices, the SiC-based devices are selected. The small-signal model of the biquadratic converter is derived, and a PI controller is designed to regulate the output voltage. The designed controller is implemented using XSG platform. Experimental waveforms for 650 V output voltage, 500 W output power and 50 kHz switching frequency are presented. The performance of the proposed converter with similar recently reported topologies is compared. Simulation results of the bi-quadratic converter interfaced solar PV panel with P&O algorithm are presented to assess the feasibility of the proposed converter in solar PV application.