High Gain Coupled Inductor-Based Dc/Dc Converter For Offshore Wind Energy Systems

Abstract

Now a days power demand are increased to reduce the power demand using renewable the energy systems. With the increasing integration of renewable energy generation into high-power grids, transmission at the dc level is becoming increasingly more useful than ac transmission. In this regard, emerging application, such as offshore wind farms, require a high-power offshore wind energy systems. The proposed dc/dc converter is characterized by the resonant switching transitions to achieve minimum switching losses and maximum system efficiency. Therefore, a higher switching frequency is conceivable to attain a higher power density. The double stage output voltage of the proposed converter operates at seven times as high as the input voltages with a small device count. The output capacitors are charged and discharged continuously by a 180 phase shift with respect to each other to eliminate the output voltage ripples with low capacitance requirements.The proposed seriesmodular and cascade configurations show the intrinsic merits of being readily applicable to multistage power switching converter. The developed topology has been implemented on a 5-kw prototype converter to test its feasibility. I.INTRODUCTION Offshore wind farms are growing rapidly because of their comparatively high stable wind conditions than onshore and land-based wind farms. Offshore 5-10MW marine turbines are becoming more attractive for the wind power industry. In particular, they increase the efficiency and, reduce, generation cost, compared previous wind turbine technologies. The power capacitance of these offshore behemoths result in an increase in the size of each components. Therefore, the offshore wind turbine manufacturers are attempting to create an optimal modelling for large marine turbines. The optimized design of offshore wind turbines should cope with the following challenges to make high power conversion systems a feasible alternative. Bulky and huge electrical components have high investment