Results 31 to 40 of about 113,685 (217)
Design and DC fault clearance of modified hybrid MMC with low proportion of full‐bridge submodules
IET Generation, Transmission & Distribution, 2021 The hybrid modular multilevel converter (MMC) consisting of half bridge submodules (HBSMs) and full bridge submodules (FBSMs) combines the respective advantages of both submodules.
Yuzhe Xu, Zheren Zhang, Zheng Xu
doaj +1 more source
High Voltage, 2018 A modular multilevel converter (MMC) is one of the promising voltage source converter topologies in the field of high-voltage direct current (HVDC) transmission.
Xiaofeng Yang +4 more
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Prospects and Challenges of 4H-SiC Thyristors in Protection of HB-MMC-VSC-HVDC Converters
IEEE Open Journal of Power Electronics, 2021 Pole-to-pole DC faults on HB-MMC-VSC-HVDC schemes impose significant risk of cascade failure on IGBT/diode pairs. Other novel topologies with fault blocking capability, i.e. AAC converters, and DC circuit breakers are not yet fully matured.
Chengjun Shen +5 more
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Modular multilevel converter composite submodule topology and control
The Journal of Engineering, 2019 The DC-side short-circuit fault suppression of modular multilevel converter (MMC) applied to DC transmission has been a technical problem. According to the different location of cutting off fault current, this study first analyses three possible ...
Jianpo Zhang, Chang Jiang, Yanan Han
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Designing of a Simulation Tool for the Performance Analysis of Hybrid Data Center Networks (DCNs)
Complexity, 2021 Data center (DC) technology changes the mode of computing. Traditional DCs consist of a single layer and only have Ethernet connections among switches. Those old-fashioned DCs cannot fulfill the high resource demand compared with today’s DCs.
Muhib Ahmad +7 more
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Reliability Assessment of Conventional Isolated PWM DC-DC Converters
IEEE Access, 2021 This paper sets forth the reliability analysis of conventional isolated pulse width modulation DC-DC (IDC-DC) converters. The IDC-DC converters are categorized into isolated single-switch DC-DC (ISSDC-DC) or multiple-switch DC-DC (IMSDC-DC) converters ...
Hadi Tarzamni +6 more
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A Hybrid Three-Level ZVZCS Converter for Photovoltaic Power Connecting to MVDC Collection System
Energies, 2022 Compared with the medium voltage ac (MVAC) collection system, the medium voltage dc (MVDC) one for renewable energy sources has many advantages. High-power dc/dc converters are one of the key stages of the MVDC collection system to boost the voltage ...
Xiaokun He, Renjie Hu, Wu Chen
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The role of miR‐335‐5p in the redifferentiation of BRAF p.V600E thyroid cancers
Molecular Oncology, EarlyView.The BRAF p.V600E mutation promotes thyroid cancer dedifferentiation and radioiodine resistance. Using a network approach, we identified miR‐335‐5p as a key regulator of BRAF‐mutated thyroid tumors. Restoring miR‐335‐5p increased thyroid‐specific gene expression and iodine uptake in cells and organoids.
Valeria Pecce +11 more
wiley +1 more source
IEEE AccessThe rapid growth in HVDC (High Voltage Direct Current) grids has shown the falls of point-to-point connections. Several challenges such as the requirement of DC (Direct Current) fault blocking capability, interfacing of different grounding schemes ...
Mohamed Mansour +4 more
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Molecular Oncology, EarlyView.Tumors contain diverse cellular states whose behavior is shaped by context‐dependent gene coordination. By comparing gene–gene relationships across biological contexts, we identify adaptive transcriptional modules that reorganize into distinct vulnerability axes.
Brian Nelson +9 more
wiley +1 more source