Modular Power Electronic Converters in the Power Range 1 to 10 kW by Pawel Klimczak Aalborg University, Denmark Institute of Energy Technology

Abstract
Thanks to CO2 emission reduction policies and increasing prices of fossil fuels a
significant growth in field of sustainable energy sources (SES) is being observed
during last decade. A government support and take-off projects in Europe and US
shall ensure an increasing trend in future too. Some of SES based plants , like
hydro-, geothermal-, biofuel-plants, use synchronous generators directly connected
to the grid. But some other SES technologies, like fuel cell or photovoltaic, require
a power electronic converter between the energy source and the load or the grid.
Work presented in this thesis concentrates on dc-dc non-isolated converters suitable
for high voltage gain applications, like uninterruptible power supply (UPS) and
some of sustainable energy sources. A special attention is on reduction of power
losses and efficiency improvements in non-isolated dc-dc step-up converters.
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