Load resilient transmission line system for long-pulse, high-power ICRF operation at KSTAR

2014 ◽  
Author(s):  
H. J. Kim ◽  
S. J. Wang ◽  
Y. S. Bae ◽  
H. L. Yang ◽  
J. G. Kwak ◽  
...  
Keyword(s):  
Transmission Line ◽  
High Power ◽  
Line System ◽  
Long Pulse

RF design and tests on a broadband, high-power coaxial quadrature hybrid applicable to ITER ICRF transmission line system for load-resilient operations

2015 ◽  
Vol 96-97 ◽  
pp. 498-502 ◽  
Author(s):  
Hae Jin Kim ◽  
Son Jong Wang ◽  
Byoung Ho Park ◽  
Jong-Gu Kwak ◽  
Julien Hillairet ◽  
...  
Keyword(s):  
Transmission Line ◽  
High Power ◽  
Line System ◽  
Rf Design

Development of high-power, long-pulse, multi-frequency ECH/CD system for JT-60SA

2021 ◽  
Author(s):  
Takayuki Kobayashi ◽  
Hibiki Yamazaki ◽  
Shinichi Hiranai ◽  
Masayuki Sawahata ◽  
Masayuki Terakado ◽  
...  
Keyword(s):  
Transmission Line ◽  
High Power ◽  
Electron Cyclotron ◽  
Current Drive ◽  
Stable Operation ◽  
Electron Cyclotron Heating ◽  
Dummy Load ◽  
Mode Purity ◽  
Long Pulse

Abstract A gyrotron and a matching optics unit (MOU) for the multi-frequency electron cyclotron heating and current drive (ECH/CD) system in JT-60SA have been developed successfully. The gyrotron demonstrated stable operation at high powers of 1.5 MW for 5 s and 1.9 MW for 1 s at 110 GHz. To obtain high HE11 mode purity (> 90%) at the outlet of the waveguide in the ECH/CD launcher, a MOU for operating at three frequencies of 82 GHz, 110 GHz, and 138 GHz that includes three pairs of water-cooled phase correcting mirrors has been developed, which allows the mirrors to be changed without opening the evacuated MOU. The mode purity at the inlet of a dummy load in the transmission line was evaluated at high-power and an HE11 mode purity of > 90% was obtained at three frequencies.

Experimental study of a 28 GHz high-power long-pulse cyclotron autoresonance maser oscillator

1993 ◽  
Vol 71 (13) ◽  
pp. 2018-2021 ◽  
Author(s):  
S. Alberti ◽  
B. G. Danly ◽  
G. Gulotta ◽  
E. Giguet ◽  
T. Kimura ◽  
...  
Keyword(s):  
Experimental Study ◽  
High Power ◽  
Cyclotron Autoresonance Maser ◽  
Long Pulse

scholarly journals The Modeling and Analysis of a Power Transmission Line Supplied by a Solar Power Plant

2018 ◽  
Vol 12 (3) ◽  
pp. 124-130
Author(s):  
Erol Can
Keyword(s):  
Power Plant ◽  
Transmission Line ◽  
Solar Power ◽  
Electrical Power ◽  
Solar Power Plant ◽  
Energy Transmission ◽  
Long Distance ◽  
Line System ◽  
Matlab Simulink ◽  
Direct Voltage

This article deals with the energy transmission line system which feeds from solar energy at the MATLAB Simulink. So, direct voltage is considered to be converted as an alternating voltage by a 35-level inverter after the solar power plant which has the power of 110 MW an produce 360 kV of direct voltage. A line which covers 240 km of distance is preferred to transmit electrical power from the A1 point to an A2 point. Due to this, the required mathematical equations are calculated with a circuit analyzing method for the line modeling in the simulation. Experiments on the model are carried out at the MATLAB Simulink after the creation of an energy transmission line. After that, when measurements are made taking into consideration the A2 node; the capacitor voltage, the transformer current, the A2 node current, and the fault current, values are given according to the converted voltage at the frequencies of 100 Hz, 80 Hz, and 50 Hz. The obtained results demonstrate the success of the proposed line system, while power is distributed with eliminated fault at a long distance at different frequencies.

Long-Pulse, High-Power Free-Electron Laser with No External Beam Focusing

1984 ◽  
Vol 53 (18) ◽  
pp. 1728-1731 ◽  
Author(s):  
J. A. Pasour ◽  
R. F. Lucey ◽  
C. A. Kapetanakos
Keyword(s):  
High Power ◽  
Free Electron ◽  
Free Electron Laser ◽  
External Beam ◽  
Beam Focusing ◽  
Long Pulse

Investigation of an ${X}$ -Band Long Pulse High-Power High-Gain Coaxial Multibeam Relativistic Klystron Amplifier

2019 ◽  
Vol 66 (1) ◽  
pp. 722-728 ◽  
Author(s):  
Zhenbang Liu ◽  
Hua Huang ◽  
Xiao Jin ◽  
Shifeng Li ◽  
Tengfang Wang ◽  
...  
Keyword(s):  
High Power ◽  
High Gain ◽  
Long Pulse ◽  
Relativistic Klystron

scholarly journals Analytical & Experimental Analysis of Lightning Stokes Performance & Protection by MOV Based Simulation Model: A 33 KV Transmission Line Case Study

2021 ◽  
Vol 4 (1) ◽  
pp. 41-46
Author(s):  
Arsal Mehmood ◽  
Huzaifa Hassan ◽  
Faraz Ahmed Baig ◽  
Suhail Ahmed Shaikh
Keyword(s):  
Transmission Line ◽  
Power Efficiency ◽  
Travelling Waves ◽  
Electrical Equipment ◽  
Defensive Strategy ◽  
Line System ◽  
Potential Harm ◽  
Fault Clearance

Researchers are working on techniques to mitigate failure rates as low as possible to avoid potential harm, sustain high power efficiency for this a considerable number of estimation studies were already performed and several designs of methodologies were being suggested. The transmission line performs the role of the arteries which maintain the process of transporting electricity in the transmission line. That is why it is important to maintain and manage the costs of these tracks.  Surge arrestor and shield wire application are often techniques chosen for defensive strategy in a very technique. By pushing travelling waves towards the electrical equipment mounted on the transmission line, the effects of lightning stoke on the transmission line may cause severe damage to the electrical equipment. In this review, this research study provides a review-based overview of the mechanism of occurrence of lightning along with its impact on the transmission line and the defence methods used to prevent such effects. A MATLAB / SIMULINK 2020a simulation modeling-based analysis for the incidence of lightning on the 33 kV transmission line system is observed in this regard, and a Metal-Oxide surge arrestor-based lightning fault clearance safety scheme is also suggested and discussed.

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