An Energy Absorbing Method for Hybrid MMCs to Avoid Full-Bridge Submodule Overvoltage During DC Fault Blocking

The full-bridge submodules (FB-SMs) in hybrid modular multilevel converters need to absorb the enormous energy stored in dc side and arm inductors during dc fault blocking, which may lead to severe overvoltage. An energy-absorbing branch (EAB) composed of metal oxide varistor (MOV) and thyristors is...

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Veröffentlicht in:	IEEE transactions on power electronics 2022-05, Vol.37 (5), p.4947-4951
Hauptverfasser:	Fang, Xiongfeng, Li, Gen, Chen, Canfeng, Wang, Dongyu, Xiong, Jian, Zhang, Kai
Format:	Artikel
Sprache:	eng
Schlagworte:	Circuit faults Converters Costs DC fault clearing Energy Energy absorption Fault currents high-voltage dc (HVdc) hybrid modular multilevel converter (MMC) Inductors Metal oxides Overvoltage Thyristors Transmission lines Turning Voltage Voltage control
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