Boost converter or step – up converter increases input voltage magnitude to a required output voltage magnitude without the use of a transformer at the same time stepping down of current from the input side. Figure shows a boost converter consisting of an inductor, a diode and a high frequency switch. The switch can be typically a MOSFET, IGBT or BJT.

The control strategy lies in the manipulation of the duty cycle of the switch which causes the voltage control in the output. In this project boost converter is used for both solar photovoltaic and wind energy system to boost up the output voltage of the two renewables to the same level of DC bus voltage. Ripple in the input and output are reduced by filters made of capacitors or inductors at input and output of converter.

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