Geometrical Optimization of Medium-Frequency Air-Core Transformers for DCX Applications

2022 ◽  
pp. 1-1
Author(s):  
Thomas Guillod ◽  
Piotr Czyz ◽  
Johann W. Kolar
Keyword(s):  
Medium Frequency ◽  
Air Core ◽  
Geometrical Optimization

Medium-frequency acoustic methods and tools for the study of the aquatic environment.

2020 ◽  
Author(s):  
N.A. Grekov ◽  
◽  
A.N. Grekov ◽  
E.N. Sychov ◽  
◽  
...  
Keyword(s):  
Aquatic Environment ◽  
Medium Frequency ◽  
Acoustic Methods

Experimental and numerical investigations of fluid flow in a hydrocyclone without an air core

CIM Journal ◽  
2017 ◽  
Vol 8 (1) ◽  
Author(s):  
E. Kucukal ◽  
J. R. Kadambi ◽  
J. Furlan ◽  
R. Visintainer
Keyword(s):  
Fluid Flow ◽  
Numerical Investigations ◽  
Air Core

scholarly journals Air-core ring fiber guiding >400 radially fundamental OAM modes across S+C+L bands

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Yingning Wang ◽  
Wenqian Zhao ◽  
Wenpu Geng ◽  
Yuxi Fang ◽  
Changjing Bao ◽  
...  
Keyword(s):  
Air Core

scholarly journals Ultrathin Muffler with Coherent Coupling Weak Resonance for HVDC Converter Station Medium Frequency Band Noise Control

2021 ◽  
Vol 772 (1) ◽  
pp. 012031
Author(s):  
Dingge Yang ◽  
Yu Shang ◽  
Yanhua Han ◽  
Wenhui Li ◽  
Jingfeng Wu ◽  
...  
Keyword(s):  
Frequency Band ◽  
Noise Control ◽  
Medium Frequency ◽  
Band Noise ◽  
Coherent Coupling ◽  
Weak Resonance

scholarly journals Miniaturization of an Offshore Platform with Medium-Frequency Offshore Wind Farm and MMC-HVDC Technology

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2058
Author(s):  
Zheren Zhang ◽  
Yingjie Tang ◽  
Zheng Xu
Keyword(s):  
Wind Power ◽  
Computer Aided Design ◽  
Wind Farm ◽  
Offshore Platform ◽  
Offshore Wind ◽  
Operating Frequency ◽  
Offshore Wind Farm ◽  
Medium Frequency ◽  
Offshore Wind Power ◽  
System Frequency

Offshore wind power has great development potential, for which the key factors are reliable and economical wind farms and integration systems. This paper proposes a medium-frequency wind farm and MMC-HVDC integration system. In the proposed scheme, the operating frequency of the offshore wind farm and its power collection system is increased from the conventional 50/60 Hz rate to the medium-frequency range, i.e., 100–400 Hz; the offshore wind power is transmitted to the onshore grid via the modular multilevel converter-based high-voltage direct current transmission (MMC-HVDC). First, this paper explains the principles of the proposed scheme in terms of the system topology and control strategy aspects. Then, the impacts of increasing the offshore system operating frequency on the main parameters of the offshore station are discussed. As the frequency increases, it is shown that the actual value of the electrical equipment, such as the transformers, the arm inductors, and the SM capacitors of the rectifier MMC, can be reduced, which means smaller platforms are required for the step-up transformer station and the converter station. Then, the system operation characteristics are analyzed, with the results showing that the power losses in the system increase slightly with the increase of the offshore AC system frequency. Based on time domain simulation results from power systems computer aided design/electromagnetic transients including DC (PSCAD/EMTDC), it is noted that the dynamic behavior of the system is not significantly affected with the increase of the offshore AC system frequency in most scenarios. In this way, the technical feasibility of the proposed offshore platform miniaturization technology is proven.

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