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Hybrid modular multilevel converter with reduced three-level cells in hvdc transmission system

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Academic year: 2019

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Figure

Fig. 1. Three-level cell based hybrid MMC (TL-HMMC) with dc fault blocking and minimized losses
Fig. 2. Equivalent circuit of three-level cell based hybrid MMC (TL-HMMC) during dc fault demonstrating that the combined TL cell voltages (4gVc) oppose input line voltage, vac
Fig. 3. Point-to-point HVDC link with TL cell based hybrid MMCs (TL-HMMC1 and TL-HMMC2).
Fig. 4. DC fault blocking waveforms of TL-HMMCs with reduced TL cells (g=0.15N). (a) DC voltage

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