Results 31 to 40 of about 643 (186)

DC fault ride‐through of MMCs for HVDC systems: a review

The Journal of Engineering, 2016
As the increasing penetration of modular multilevel converter (MMC)‐based high‐voltage direct current (HVDC) into bulky power transmission systems, the performance of MMC on dealing with DC faults, especially on temporary DC fault in overhead transmission lines, has been becoming more and more significant.
Jiabing Hu, Rong Zeng, Zhiyuan He
openaire   +1 more source

Unidirectional HVdc Topology With DC Fault Ride-Through Capability

Canadian Journal of Electrical and Computer Engineering, 2017
HVdc transmission using modular multilevel converters (MMCs) is becoming increasingly prevalent. However, line-commutated converter (LCC) HVdc transmission remains advantageous in its ability to clear dc faults and restart power transmission without operation of the ac system protection. This paper presents an HVdc system topology that employs both MMC
Steven Howell, Shaahin Filizadeh, Aniruddha M. Gole   +2 more
openaire   +1 more source

Dual Channel Control With DC Fault Ride Through for MMC-Based, Isolated DC/DC Converter [PDF]

IEEE Transactions on Power Delivery, 2017
This paper presents the two-channel controller with inner current loops for dual bridge, DC/DC converter, based on modular multilevel converter (MMC) technology. The DC/DC control strategy is based on two inner fast current control loops in dq rotating frame at each of the two MMC bridges. These current controls facilitate operation through dc faults
Jovcic, Dragan, Zhang, Huibin
openaire   +2 more sources

A Hybrid HVDC Topology Suitable for Large-Scale Pure Clean Energy Power Base Transmission

Zhongguo dianli, 2023
In order to meet the transmission needs of large-scale pure new energy power bases, after topology comparison, this paper used a hybrid cascaded topology consisting of a line commutated converter (LCC) and a modular multilevel converter (MMC) in the ...
Wenzhe XU, Zheren ZHANG, Zheng XU
doaj   +1 more source

Hierarchical control-based fault ride-through of VSC-HVDC considering impacts of renewable energy

International Journal of Electrical Power & Energy Systems
When a short-circuit fault occurs at the receiving-end grid, the unbalanced power in voltage source converter based high voltage direct current (VSC-HVDC) should be consumed to prevent excessive DC voltage rise, thereby enabling fault ride-through ...
Jinxin Ouyang, Fan Mo, Jiyu Chen
doaj   +1 more source

Magnetic‐Field Control of Surface States in CoFe2O4 Thin Films for Nitrate Electroreduction to Ammonia

Advanced Functional Materials, EarlyView.
Magnetic‐field‐assisted CVD of heterometallic single‐source precursors modulates thin‐film surface electronic structure and interfacial charge transfer. Field‐grown (Cobalt ferrite‐1T)CF‐1T films exhibit stabilized electronic states, lower kinetic barriers, and markedly enhanced nitrate‐to‐ammonia electrocatalysis versus (Cobalt ferrite‐0T) CF‐0T ...
Touraj Karimpour, Younes Mousazade, Simon Diel, Shilendra Kumar Sharma, Tisita Das, Nathália C. Verissimo, Thomas Fischer, Ziyaad Aytuna, Andreas Lichtenberg, Sudip Chakraborty, Marcel Risch, Sanjay Mathur   +11 more
wiley   +1 more source

Analysis of hybrid energy storage systems with DC link fault ride-through capability [PDF]

2016 IEEE Energy Conversion Congress and Exposition (ECCE), 2016
This work has been partially supported by the Spanish Government, Innovation Development and Research Office (MEC), under research grant ENE2013-44245-R, Project “Microholo”, and by the European Union through ERFD Structural Funds (FEDER). This work has been partially supported by the government of Principality of Asturias, Foundation for the Promotion
Georgious Zaher Georgious, Ramy, García García, Jorge, García Fernández, Pablo, Sumner, M.   +3 more
openaire   +3 more sources

A High Energy Barrier DyIII2 Single‐Molecule Magnet Supported by a Bulky, Anionic N–O Bridging Ligand

Chemistry – A European Journal, EarlyView.
Complex [Dy2(hynad)2(dbm)4] was prepared by the employment of the anionic N–O‐based bridging and chelating N‐hydroxy‐1,8‐naphthalimide ligand, featuring a {Dy2(µ‐OR)2}4+ core and exhibiting zero‐field SMM behavior with a Ueff value of 171 K and double‐S‐shaped hysteresis loops, open up to 3.5 K.
Alexandros S. Armenis, Concepción Molina‐Jirón, Konstantinos N. Pantelis, Wolfgang Wernsdorfer, Mario Ruben, Eufemio Moreno‐Pineda, Theocharis C. Stamatatos   +6 more
wiley   +1 more source

Systematic Evaluation of Data and Trial Fitness for Oncology Trial Emulation: Empirical Findings from the CARE Initiative

Clinical Pharmacology &Therapeutics, EarlyView.
The Coalition to Advance Real‐World Evidence through Randomized Controlled Trial Emulation (CARE) Initiative seeks to advance understanding of when real‐world data (RWD) can generate valid treatment effectiveness estimates by emulating completed oncology randomized controlled trials (RCTs).
Natalie Levy, Paige Sheridan, Ulka Campbell, David Lenis, Inish O'Doherty, Adina Estrin, Nileesa Gautam, Monica Iyer, Sarah McDonald, Andrew Belli, Gillis Carrigan, K. Arnold Chan, James Chen, Victoria Chia, Neil Dhopeshwarkar, Joy Eckert, Laura Fernandes, Joel Greshock, Rachele Hendricks‐Sturrup, Jenny Huang, XiaoLong Jiao, Sajan Khosla, Orsolya Lunacsek, Lynn McRoy, Yanina Natanzon, Osayi Ovbiosa, Nelson Pace, Simone Pinheiro, Megan Rees, Jennifer Rider, Mothaffar Fahed Rimawi, Travis Robinson, Carla Rodriguez‐Watson, Chithra Sangli, Khaled Sarsour, Sebastian Schneeweiss, Mark Shapiro, Mark Stewart, Aliki Taylor, C. K. Wang, Shirley Wang, Yiduo Zhang, Ann Madsen   +42 more
wiley   +1 more source

A grid side fault ride-through control for renewable energy connected MMC-HVDC

电力工程技术
Renewable energy connected modular multilevel converter high-voltage direct-current (MMC-HVDC) system should have the capability of fault ride-through when the AC grid fails. However, it is difficult to quickly and reliably achieve fault ride-through via
Qiang HUANG, Kuan LI, Rongqi FAN, Yudun LI, Xuezheng DONG, Ke JIA   +5 more
doaj   +1 more source