Coupled-Inductor and Voltage-Doubler Circuits with High Step-Up DC-DC Converter
Abstract
Renewable energy sources such as photovoltaic (PV) cell and fuel cell
are characterized by low output voltage, strict current ripple requirement and
high output current hence they require high step up gain DC-DC converter as an
important interface with the power grid or distributed generation (DG) system.
High gain high efficiency DC-DC converter as a power conditioning unit for a
renewable energy sources is presented here. A novel high step-up dc–dc
converter with coupled-inductor and voltage-doubler circuits is proposed. The
coupled-inductor and voltage-doubler circuits are integrated in the proposed
converter to achieve high step up voltage gain. The converter achieves high
step-up voltage gain with appropriate duty ratio and low voltage stress on the
power switches. Also, the energy stored in the leakage inductor of the coupled
inductor can be recycled to the output. The operating principles and the
steady-state analyses of the proposed converter are discussed in detail.
Finally, a prototype circuit of the proposed converter is implemented in the
laboratory to verify the performance of the proposed converter.
Country : India
1 Kondaparthy. Laxmi Krishna
Assistant Professor, Department of EEE, M-Tech (Power Electronics), JNTU-HYD, India
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