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With the development of offshore wind power generation, large-capacity medium-voltage wind turbine becomes the development trend. In this paper, the cascaded multi-cell topology with four-quadrant operation capacity is applied to medium-voltage wind power converters, which consist of a large number of switching devices, so it is essential to improve the converter's fault-tolerant ability. Once the...
Derived from the classical phase-shift control DC-DC converter, isolated modular multilevel (MML) DC-DC converter has two MMCs connected via a medium frequency AC transformer. Due to the high voltage handling ability, small transformer size, and natural ZVS soft switching this topology is attractive for medium-and high-voltage DC-DC conversion applications. However, in conventional modulation methods...
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