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An enhanced MMC topology with DC fault ride-through capability
IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society, 2013High-voltage direct current system using modular multilevel converter (MMC-HVDC) is a potential candidate for grid integration of renewable energy over long distances. The dc-link fault is an issue MMC-HVDC must deal with. This paper proposed an enhanced MMC topology with dc fault ride-through capability.
Xiaoqian Li +4 more
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Fault Ride Through for a DC ring bus microgrid
2016 International Conference on Energy Efficient Technologies for Sustainability (ICEETS), 2016DC microgrid is gaining more prominence due to the development of renewable resources that generate DC output and also due to the increasing use of DC in end-user equipments. Also with DC system, connection of backup energy storage and small size generation is easier to realize. For any system, disconnecting a part of the system during temporary faults
null Vishnupriya S, P Kanakasabapathy
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A fault ride through strategy of multi-ports DC transformer
2020 5th International Conference on Automation, Control and Robotics Engineering (CACRE), 2020DC transformer (DCT) is the main and key equipment of DC distribution network. Multi-ports DCT can connect multiple DC lines or networks at the same time, which has high power supply reliability and is suitable for interconnection equipment among different DC power grids.
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A DC Solid State Transformer with DC Fault Ride-through Capability
2018 IEEE Energy Conversion Congress and Exposition (ECCE), 2018This paper investigates a DC solid state transformer (DCSST) with DC fault ride-through (FRT) capability for medium voltage DC (MVDC) systems. The ability of short circuit fault clearance on the medium voltage (MV) side can be promoted with a suitable control scheme by introducing one or several full bridge converters to the cascaded DC converter ...
Haoyuan Weng +4 more
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A Transformerless Hybrid Modular Multilevel DC–DC Converter With DC Fault Ride-Through Capability
IEEE Transactions on Industrial Electronics, 2019This paper proposes a hybrid modular multilevel dc–dc converter with dc fault ride-through capability. In each phase, the lower arm and shunt arm are composed of half-bridge submodules and full-bridge submodules (FBSMs) respectively, and the upper arm is composed of both types of submodules.
Fei Zhang 0004, Wei Li 0097, Géza Joós
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The design and fault ride through control of un-interrupted DC-DC Autotransformer
Science China Technological Sciences, 2018This paper proposed a novel type of DC-DC converter, termed as un-interrupted DC Autotransformer (un-interrupted DC AUTO), which has the capability to ride through DC fault on either side of the converter without blocking any devices. Besides that, the adequately designed converter retains the advantages of DC AUTO technology, namely reduced investment
MengBo Li +5 more
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Fault ride-through capability of hybrid AC/DC microgrids during AC and DC network faults
2017 IEEE Energy Conversion Congress and Exposition (ECCE), 2017This paper investigates the fault ride-through (FRT) capability of a hybrid AC/DC microgrid during both AC and DC network faults. In this investigation, commonly proposed FRT strategies for the distributed energy resources and AC and DC microgrids are implemented while the interlinking bidirectional converter is operated in power transfer mode.
Lasantha Meegahapola +3 more
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A voltage-balanced hybrid MMC topology for DC fault ride-through
2019 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia), 2019This paper proposes a voltage-balanced HBSMCDSM hybrid MMC topology. This topology adds diodes between sub-modules based on the traditional HBSM-CDSM hybrid topology. The diode's single-conductivity provides a new loop for fault current removal and changes the characteristics of bypassing HBSM during faults. The new topology can quickly clear the fault
Mao Ji, Yi Wang, Kaidong Tan, Chen Wang
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A New Hybrid Submodule for MMC with DC Fault Ride-Through Capability
2018 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), 2018Modular multilevel converter (MMC) has become the most prominent topology for high voltage direct current (HVDC) applications due to its modularity, lower losses, less filtering requirements and flexible controllability. However, MMC still lacks in terms of efficiency and fault tolerant capability compared to the line commutated converters (LCC) based ...
Yedida Ayyappa Rudrasimha +2 more
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Improved DC/DC Link Control for Fault-Ride-through Capability of Photovoltaic Inverter
2012The main topologies of PV inverters consist in two stages: DC/DC and DC/AC. Under grid fault, the voltage of DC link increases and can produce a disconnection due to internal protection. This paper presents a new DC link voltage control in order to avoid this drawback.
Nguyen, V.L., Tran-Quoc, T., Bacha, S.
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