Results 11 to 20 of about 495 (98)
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
doaj +2 more sources
Analysis of two-phase operation characteristics of a flexible low-frequency transmission system
Zhejiang dianli, 2022 The two-phase operation mode of a flexible low-frequency transmission system is based on the M3C （modular multilevel matrix converter）. This paper establishes a complex sequence network for the low-frequency system to analyze the steady-state operation ...
LU Yi +6 more
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Regional Science Policy &Practice, Volume 15, Issue 7, Page 1424-1457, September 2023., 2023 Abstract This paper develops a multidimensional methodological framework for examining the geographical handicaps and associated socioeconomic drawbacks of nomenclature of territorial units for statistics (NUTS) III regions in Greece to conceive diverse dimensions of peripherality and target the de‐peripheralization of peripheral regions.
Dimitrios Tsiotas, Vassilis Tselios
wiley +1 more source
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, Volume 15, Issue 16, Page 1814-1830, 16 December 2022., 2022 Abstract 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 (FFTS) application.
Yongqing Meng +5 more
wiley +1 more source
IET Generation, Transmission &Distribution, Volume 16, Issue 15, Page 2977-2988, August 2022., 2022 Abstract Fractional frequency transmission is a promising solution to offshore wind power integration. This paper proposes a new grid integration scheme of fractional frequency offshore wind power system (FFOWPS) based on Y‐connected modular multilevel converter (Y‐MMC).
Yongqing Meng +5 more
wiley +1 more source
International Transactions on Electrical Energy Systems, Volume 2022, Issue 1, 2022., 2022 Nowadays, researchers focus on the modular multilevel converter (MMC), due to its modularity structure, effective sharing of voltages among the submodule switches, and betterment in the quality of the voltage and current waveforms. First, the conventional unified power quality conditioner is developed with two level voltage source converters connected ...
T. M. Thamizh Thentral +8 more
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Zhejiang dianli, 2022 Due to the long delay of their control chains， voltage source converters （VSCs） in the high frequency band tend to show negative damping， which may give rise to high-frequency resonance when VSCs are connected to power systems.
HUA Wen +6 more
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Energy Reports, 2023 The inevitable consequence of the rapid transition to high-proportion renewable energy and high-proportion power electronics with the development of power systems is the loss of the traditional high-volume generation of synchronous generators, their ...
Feng Guo +5 more
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Integration technology and practice for long‐distance offshore wind power in China
Energy Conversion and Economics, Volume 1, Issue 1, Page 4-19, September 2020., 2020 Abstract Offshore wind power is an important kind of clean energy and of great development potential in the future. It has advantages of high wind speed and stable wind power, and gradually exhibits large‐scale, clustering, and long‐distance characteristics.
Ersheng Pan +4 more
wiley +1 more source