Results 31 to 40 of about 495 (98)
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 +6 more
wiley +1 more source
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 +5 more
doaj +1 more source
CSEE Journal of Power and Energy SystemsThe 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 +7 more
doaj +1 more source
IEEE Journal of Emerging and Selected Topics in Power Electronics, 2021 In this work, a continuous-control-set model predictive control (CCS-MPC) strategy, with a saturation scheme for protection, is presented for regulating the circulating currents of a modular multilevel matrix converter (M3C).
Matías Urrutia +3 more
semanticscholar +1 more source
Journal of Physics: Conference Series, 2022 Low frequency AC transmission has broad prospects in the future power system. How to establish its electromechanical transient simulation model and provide basic research means for its adaptability analysis after connecting to the large power grid is an ...
Ze-Lei Yang +5 more
semanticscholar +1 more source
A Low Inrush Current Pre-Charging Strategy of M3C with Improved Nearest Level Modulation
EnergiesThe modular multilevel matrix converter (M3C) can perform AC/AC conversion directly. However, M3C operation often requires a pre-charging process, which can be challenging due to the need for fast pre-charging with low inrush current.
Rufei He +6 more
doaj +1 more source
Shanghai Jiaotong Daxue xuebaoModular multilevel matrix converter (M3C) is the core device of the fractional frequency transmission system. Due to the lack of direct current link, the electrical quantities of different frequencies are directly coupled inside the M3C, resulting in a ...
JIANG Yafeng, LI Yibo, WU Qiuwei, LIU Shenquan, WU Xiaodan, ZHOU Qian
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Control Strategy for Improving Active Frequency Support Capability of Offshore Wind Farm
Shanghai Jiaotong Daxue xuebaoIn low frequency alternating current (AC) transmission systems, offshore wind farm is unable to respond to changes in onshore grid frequency in a timely manner due to frequency decoupling and signal transmission delays between the offshore wind power ...
LI Yibo, ZHOU Qian, ZHU Dandan, JIANG Yafeng, WU Qiuwei, CHEN Jian
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International Journal of Electrical Power & Energy SystemsThe Modular Multilevel Matrix Converter (M3C) has emerged as a promising solution for high-power fractional frequency transmission systems (FFTS), offering superior modularity and flexible control capabilities. However, conventional proportional-integral
Wei Luo, Yuchen Ma, Zhe Li, Yunqiao Shen
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电力工程技术As a fault occurs on lines of a two-terminal low-frequency transmission system, fault currents will be suppressed when frequency converters adopt negative sequence current suppression strategy.
Yangang SHI +5 more
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