An Auxiliary Circuit Enhancing the DC Fault Clearing Capability of Hybrid MMCs with Low Proportion of FB-SMs
نویسندگان
چکیده
The hybrid modular multilevel converter (HMMC) composed of half-bridge (HB) and full-bridge (FB) submodules (SMs) is an alternative to the FB-modular (MMC) with lower loss cost. However, HMMC's maximum reverse-biased voltage (RBV) than FB-MMC, so does dc fault clearing capability (DCFCC). Reduced RBV will prolong time, especially when side inductance large. In this letter, auxiliary circuit proposed for HMMCs, which can change current paths enable both HB- FB-SMs participate in clearing. Thus, HMMC increased be equal FB-MMC. Moreover, proportion reduced. With circuit, DCFCC enhanced reduction power losses semiconductor costs. Simulations scaled-down experiments validate method.
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ژورنال
عنوان ژورنال: IEEE Transactions on Power Electronics
سال: 2022
ISSN: ['1941-0107', '0885-8993']
DOI: https://doi.org/10.1109/tpel.2022.3171552