Analysis of Short Circuit Fault for 4.6GHz/6MW LHCD High Voltage Power Supply
Journal of Electrical and Electronic Engineering
Volume 5, Issue 4, August 2017, Pages: 116-122
Received: May 25, 2017; Accepted: Jun. 3, 2017; Published: Jul. 17, 2017
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Authors
Zhigang Yang, Department of Power Supply and Control Engineering, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China; Science Island Branch of Graduate School, University of Science and Technology of China, Hefei, China
Peng Fu, Department of Power Supply and Control Engineering, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China; Science Island Branch of Graduate School, University of Science and Technology of China, Hefei, China
Fei Guo, Department of Power Supply and Control Engineering, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China
Haozhang Sun, Department of Power Supply and Control Engineering, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China
Jian Zhang, Department of Power Supply and Control Engineering, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China
Mao Wang, Department of Power Supply and Control Engineering, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China
Fukun Liu, Department of Power Supply and Control Engineering, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China
Yiyun Huang, Department of Power Supply and Control Engineering, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China
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Abstract
4.6GHz/6MW Lower Hybrid Current Drive (LHCD) is one of plasma current heating methods for Experimental Advanced Superconducting Tokamak (EAST). High Voltage Power Supply (HVPS) is the power supply subsystem of 4.6GHz/6MW LHCD system, which was designed, built and accepted successfully by Chinese National Development and Reform Commission in 2015. Then the new system has been in use for the 2015 EAST campaign. This paper presents the structure of 4.6GHz/6MW LHCD-HVPS and its transient operation state when its klystron load has short circuit fault. In order to protect the klystron and HVPS itself, the short-circuit fault and its transient process are analyzed and calculated in detail. And a three-electrode gas switch has been built to eliminate the short-circuit fault in microseconds. In addition, the effectiveness of the three-electrode gas switch has been verified by simulation and experiment result. The HVPS has been used in 4.6GHz/6MW LHCD system and it has good performance for the entire 2015 EAST campaign.
Keywords
Lower Hybrid Current Drive, High Voltage Power Supply, Pulse Step Modulation, Three-Electrode Gas Switch, Short Circuit Fault
To cite this article
Zhigang Yang, Peng Fu, Fei Guo, Haozhang Sun, Jian Zhang, Mao Wang, Fukun Liu, Yiyun Huang, Analysis of Short Circuit Fault for 4.6GHz/6MW LHCD High Voltage Power Supply, Journal of Electrical and Electronic Engineering. Vol. 5, No. 4, 2017, pp. 116-122. doi: 10.11648/j.jeee.20170504.12
Copyright
Copyright © 2017 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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