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A Generalized Cross-Connected Submodule Structure for Hybrid Multilevel Converters.
- Source :
-
IEEE Transactions on Industry Applications . Jul2016, Vol. 52 Issue 4, p3159-3170. 12p. - Publication Year :
- 2016
-
Abstract
- The fault-tolerant multilevel converters are gaining increased interests for high-voltage direct current (HVDC) applications due to their ability to suppress the fault current during dc-side faults. However, most of these topologies use full-bridge submodules (FBSMs) resulting in the requirement of a large number of semiconductor switches. In this paper, a new generalized cross-connected SM (GX-SM) structure is presented, which requires lesser number of switching devices and provides the same functionality as the FBSM. A comparison of the switches required in the different converter topologies using FBSMs and GX-SMs is performed. The performance evaluation of two of the dc-side fault-tolerant converter topologies, namely alternate arm modular multilevel converter (AAMMC) and hybrid cascaded modular multilevel converter (HCMC) with the GX-SM, is performed using simulation studies done in PSCAD/EMTDC. The modulation and control schemes for these GX-SMs-based converters are presented. A new mixed-SM configuration of AAMMC is proposed which utilizes an optimal combination of GX-SMs and half-bridge SMs. The study results demonstrate the effectiveness of the proposed GX-SM structure, and satisfactory responses of the GX-SMs-based AAMMC and HCMC systems controlled using the presented modulation and control strategies under various system conditions. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 00939994
- Volume :
- 52
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Industry Applications
- Publication Type :
- Academic Journal
- Accession number :
- 116872158
- Full Text :
- https://doi.org/10.1109/TIA.2016.2535117