Results 51 to 60 of about 176 (97)

Air Pollution‐Induced Epigenetic Regulation in Respiratory Diseases: Mechanisms, Dysregulation, and Therapeutic Opportunities

MedComm – Future Medicine, Volume 4, Issue 4, December 2025.
Air pollution, a major global health hazard, contributes to asthma, chronic obstructive pulmonary disease, pulmonary fibrosis, and lung cancer via four core epigenetic pathways (DNA/RNA methylation, noncoding RNAs, and histone modifications), shaping gene expression and driving disease pathogenesis.
Ruitong Zeng, Jiliu Liu, Guoping Li, Junyi Wang, Anying Xiong, Ying Xiong, Xiang He   +6 more
wiley   +1 more source

Energy Pulsation Reduction in Modular Multilevel Converters Using Optimized Current Trajectories [PDF]

, 2021
In power electronics, the modular multilevel converter (MMC) is an easily scalable topology with an high output voltage quality. It is suitable for the transmission of large amounts of electrical power over long distances, which supports the realization ...
Bräckle, Dennis, Gröll, Lutz, Hagenmeyer, Veit, Hiller, Marc, Himmelmann, Patrick   +4 more
core   +2 more sources

A Low‐Frequency Transformer Protection Method Based on Excitation Inductance Parameter Identification

IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.
In this paper, we propose a method to effectively identify faults and excitation inrush currents in the area by using the characteristics of instantaneous excitation inductance, so as to improve the reliability and accuracy of low‐frequency transformer protection in offshore wind power low‐frequency transmission system.
Shuping Gao, Zhe Quan, Xinyu Wu, Chenqing Wang, Shi Chen, Yaming Ge, Xiangping Kong   +6 more
wiley   +1 more source

Adaptability Analysis and Improvement of Traditional Transformer Protection in Offshore Low‐Frequency Wind Power System

IET Generation, Transmission &Distribution, Volume 19, Issue 1, January/December 2025.
In this paper, a zero‐sequence differential protection based on phase difference is proposed for the internal grounding fault of the transformer, which has strong anti‐excitation inrush current interference, and the protection criterion is the self‐generated ze‐ro‐sequence current and the neutral zero‐sequence current on the high‐voltage side of the ...
Chenqing Wang, Shi Chen, Xinyu Wu, Yaming Ge, Xiangping Kong, Shuping Gao, Jinyu Zhou   +6 more
wiley   +1 more source

Small signal model of modular multilevel matrix converter for fractional frequency transmission system [PDF]

, 2019
Fractional frequency transmission is a promising technology for medium distance offshore wind power transmission. The key component in the fractional frequency transmission system (FFTS) is the modular multilevel matrix converter (M3C). It is regarded as
Luo, Jiajie, Xue, Ying, Zhang, Xiao-ping
core   +1 more source

Fault ride-through coordinated control strategy for offshore wind power via flexible low-frequency transmission system

电力工程技术
The offshore wind power via flexible low-frequency transmission (FLFT) system based on the modular multilevel matrix converter (M3C) faces power surplus and stability risks following faults on the power frequency grid side.
Nianwen XIANG, Hailong CHENG, Shouhong YE, Bingbing SHAO, Shulai WANG, Yi LU   +5 more
doaj   +1 more source

Fully Decoupled Branch Energy Balancing Control Method for Modular Multilevel Matrix Converter Based on Sequence Circulating Components

CSEE Journal of Power and Energy Systems
The modular multilevel matrix converter (M3C) is a potential frequency converter for low-frequency AC transmission. However, capacitor voltage control of high-voltage and large-capacity M3C is more difficult, especially for voltage balancing between ...
Zexin Zhao, Weijiang Chen, Zhichang Yang, Guoliang Zhao, Bin Han, Yunfei Xu, Nianwen Xiang, Shulai Wang   +7 more
doaj   +1 more source

The application of the modular multilevel matrix converter in high-power wind turbines [PDF]

, 2016
The trend in wind turbines has shown an ongoing power rating growth, reaching sizes up to 10 MW. Multilevel converters have therefore become a favourable solution for Multi-MW Wind Energy Conversion Systems (WECSs), due to high efficiency, reliability ...
Cardenas, Roberto, Diaz, Matias, Espinoza, Mauricio, Mora, Andreas, Wheeler, Patrick   +4 more
core   +1 more source

State Space Modelling and Control of the Modular Multilevel Converter [PDF]

, 2021
In der vorliegenden Arbeit wird ein neuer Ansatz zur Modellierung von Systemen basierend auf dem Modularen Multilevel Umrichter (MMC) vorgestellt. Mit Hilfe dieses Ansatzes ist es möglich, neue, effiziente Regelungsalgorithmen für das System zu ...
Bräckle, Dennis
core   +2 more sources

Operating Performance of the Modular Multilevel Matrix Converter in Drive Applications [PDF]

, 2015
The Modular Multilevel Matrix Converter (M3C) is an emerging topology, especially suitable for high torque low speed drive applications in the medium voltage range. One special benefit is the overload capability of the output currents.
Braun, Michael, Bräckle, Dennis, Gommeringer, Mario, Kammerer, Felix, Schnarrenberger, Mathias   +4 more
core   +2 more sources