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Bidirectional Buck-Boost Inverter-Based HVDC Transmission System With AC-Side Contribution Blocking Capability During DC-Side Faults.
- Source :
- IEEE Transactions on Power Delivery; Jun2014, Vol. 29 Issue 3, p1249-1261, 13p
- Publication Year :
- 2014
-
Abstract
- Offshore wind energy is now seen as a key contributor for the future renewable energy mix. HVDC technology is among the chief technologies enabling widespread use of offshore wind. Thanks to their numerous advantages, voltage-source converter-based-HVDC (VSC-HVDC) systems are expected to be the technology of choice. Unfortunately, most of VSCs are defenseless against dc-side faults, such as two-level VSCs, and half-bridge modular multilevel converters. This paper proposes the buck-boost inverter-based-HVDC system (BBI-HVDC) as a means to overcome the limitations of the classical VSC-HVDC systems. The proposed configuration does not only provide sinusoidal three-phase voltage, but also provides complete blocking capability of ac-side contributions during a dc-side fault. The latter is achieved by simply disabling the gating signals to the switches upon fault detection. The performance of the proposed system is illustrated during normal conditions, ac-side faults, and dc-side faults. A simulation case study comparing the performance of the conventional HVDC converters with the proposed system during dc-side faults is conducted. The simulation results reveal the promising performance under normal operation as well as a significant decrease in the dc fault current due to the ac-side contribution blocking capability of the BBI-HVDC system during dc-side faults. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 08858977
- Volume :
- 29
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Power Delivery
- Publication Type :
- Academic Journal
- Accession number :
- 96209139
- Full Text :
- https://doi.org/10.1109/TPWRD.2014.2308274