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CES Transactions on Electrical Machines and Systems, 2022 Offshore wind energy is an important part of clean energy, and the adoption of wind energy to generate electricity will contribute to the implementation of the carbon peaking and carbon neutrality goals.
Zhidong Yuan +4 more
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Journal of Modern Power Systems and Clean Energy, 2017 A fractional frequency transmission system (FFTS) is a promising solution to offshore wind power integration, for which the hexagonal modular multilevel converter (Hexverter) is an attractive choice for power conversion.
Yongqing Meng +5 more
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Journal of Modern Power Systems and Clean Energy, 2019 A fractional frequency transmission system (FFTS) is the most competitive choice for long distance transmission of offshore wind power, while the Hexverter, as a newly proposed direct AC/AC converter, is an attractive choice for its power conversion ...
Yongqing Meng +4 more
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Research on Quasi-Proportional Resonant Control of Modular Multilevel Matrix Converter [PDF]
Zhengzhou Daxue xuebao. Gongxue ban, 2021 As a new AC/AC conversion device, modular multilevel matrix converter (MMMC) has advantages in low frequency and large capacity applications such as fractional frequency transmission system, whereas its bridge arm current control is complicated.
Wang Mingdong +4 more
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IET Generation, Transmission & Distribution, 2023 The Fractional Frequency Transmission System (FFTS) operates with low frequency to decrease the electrical length of AC transmission lines, consequently enhancing transmission capacity.
Zhongqi Cai +6 more
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电力工程技术, 2022 The modular multilevel matrix converter (M3C) is the core equipment for fractional frequency transmission system (FFTS). The AC-AC conversion of M3C leads to direct coupling of the ac electrical quantities at different frequencies,causing complex ...
SUN Yuwei +5 more
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IET Power Electronics, 2022 Based on the modular topology and the traditional voltage‐sourced converter (VSC) model, this paper presents an isolated modular multi‐level AC/AC converter with high‐frequency (HF) link and pulse flip circuit for fractional frequency transmission system
Yongqing Meng +5 more
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IET Generation, Transmission & Distribution, 2022 Based on a practical long‐distance large‐capacity transmission engineering case, the small‐signal stability of fractional frequency transmission system (FFTS) with Y‐connected modular multi‐level converter (Y‐MMC) is mainly researched in this paper ...
Yongqing Meng +6 more
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Start control of an M^3C-based FFTS
The Journal of Engineering, 2019 The fractional frequency transmission system (FFTS) can multiply increase transmission capacity by using a lower frequency to reduce the reactance of the AC transmission system. The modular multi-level matric converter (M^3C) as the new generation of the
Xiaoliang Zhang +5 more
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Analysis of Static Voltage Stability in Fractional Frequency Transmission Systems [PDF]
Dianli jianshe[Objective] This paper systematically analyzes the static voltage stability and power limit characteristics of the fractional frequency transmission system （FFTS）， exploring the variation laws and intrinsic mechanisms under varying frequencies and ...
ZHANG Haitao, YANG Kejun, LI Baoquan, ZHANG Siqi, ZHAO Chenting, WEI Yiming, WANG Xiuli, WANG Xifan
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