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Low voltage high power wind energy conversion system (WECS) requires heavy cables and large step-up grid interfacing transformers. In recent years, power and voltage rating of offshore wind turbines have already reached 10MW and 10kV respectively, and medium voltage converters have become strongly demanded. Some scholars proposed a cascaded multilevel converter based on dual active bridge (DAB) to...
This paper presents the modeling and design of a novel ZVZC FB-PWM converter. Compared to the traditional topology which employs a saturated inductor to block the reverse current in order to achieve ZCS for the lagging leg, a novel one using two diodes in series with the lagging leg is adopted. Both the duty ratio loss is reduced and the efficiency is improved, which further reliefs the problem of...
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