Voltage balancing in an interleaved high gain boost converter

This paper proposes the application of a boost dc-dc converter topology for voltage balancing of the dc link in a diode clamped multilevel inverter, with the purpose to use it in renewable energy generation based on photovoltaic systems or fuel cell stacks. The converter features voltage balance in output capacitors, high voltage gain without utilizing extreme values of duty cycle or transformers, input current ripple reduction by interleaved inductors, low count of components and reduced weight and size. These characteristics make the converter ideal for dc link interface in a renewable energy generation system based on diode clamped multilevel inverter where low input current ripple, high voltage gain and output voltage balance are required. Theoretical analysis along with simulation and experimental validation are presented in this work.