Interleaved Multistage Step-Up Topologies with Voltage Multiplier Cells

• Main Authors: Ahmad Alzahrani, Pourya Shamsi, Mehdi Ferdowsi
• Format: Article
• Language: English
• Published: MDPI AG 2020-11-01
• Series: Energies
• Subjects: DC-DC; interleaving; high-voltage-gain; multistage; PV; voltage multiplier cells
• Online Access: https://www.mdpi.com/1996-1073/13/22/5990

This paper proposes a family of high-voltage-gain step-up dc-dc converters for photovoltaic integration application. The proposed converters are capable of converting the low voltage from input sources to a dc bus. The proposed family is constructed of interleaved single-switch multistage boost converters and voltage multiplier cells (VMC). The proposed converters feature low voltage stress across the components, equal current sharing among all phases, and a smooth input current. Moreover, the proposed family of converters has a modular structure in both the VMC and the boost stage. That is, the VMC can have <i>N</i> number of cells, and the boost stage can have <i>k</i> number of stages. The <i>k</i> can be different in each phase, allowing the designers to integrate two independent renewable energy sources with different output voltages. An example converter was explained, analyzed, and simulated. An 80 W hardware prototype was implemented to confirm the converter’s operation and validate the analysis.