An Interleaved Zero-Voltage Zero-Current Switching High Step-Up DC-DC Converter

• Published in: IEEE access Vol. 9; pp. 5563 - 5572
• Main Authors: Zhu, Binxin, Chen, Shihuan, Zhang, Yao, Huang, Yu
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Capacitors; Circuit design; Conversion; DC-DC power converters; Direct current; Electric power generation; high efficiency; high step-up; Inductors; Interleaved; passive snubber circuit; Snubbers; Switches; Switching; Topology; Voltage converters (DC to DC); Zero current switching; ZVZCS
• ISSN: 2169-3536; 2169-3536
• DOI: 10.1109/ACCESS.2020.3048387

An interleaved zero-voltage zero-current switching (ZVZCS) high step-up DC-DC converter is proposed for modern photovoltaic power generation systems. The proposed converter can achieve high voltage conversion gain without operating under extreme duty cycles. The voltage conversion gain can be readily adjusted by selecting different numbers of the diode-capacitor multiplier (DCM) cells in the circuit at the design stage. Moreover, with the passive snubber circuit in the proposed converter, all power switches and diodes in the DCMs can achieve zero-voltage turn-off and zero-current turn-on, which effectively reduces switching losses and increases the overall converter efficiency. The operational principles and analysis of the performance analysis with two DCMs are presented for demonstrative purpose. The effectiveness of the proposed ZVZCS DC-DC converter is validated using an 800W experimental prototype.