| CPC H02M 1/0045 (2021.05) [H02M 3/155 (2013.01); H02M 7/217 (2013.01)] | 3 Claims |
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1. A modular power conversion system comprising multiple modules,
wherein the multiple modules are connected in series on an input side and in parallel on an output side; and
wherein one or more of the multiple modules comprise a first and second power semiconductor switches and transformer isolation; and
wherein one or more of the multiple modules comprise a de bus or link; and
wherein one or more of the multiple modules comprise an auxiliary circuit comprised of a switch and an inductor element, and
wherein a number of the multiple modules are operated in an active mode with a fixed input-to-output voltage ratio; and
wherein another number of the multiple modules are operated in a bypassed mode with a conduction path across the input side and with no power transfer to the output side; and
wherein prior to bypassing any one of the number of multiple modules, an energy in its internal dc bus or link is removed to the inductor element or to an adjoining module in the power conversion system; and
wherein after removal of the energy in the internal de bus or link, the first and second power semiconductor switches are turned on to provide a short-circuit conduction path across the internal dc bus or link in the bypassed mode.
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