Research on three-phase four-wire NPC converter for Tokamak low-frequency resonance suppressor

Xianshun Shen; Ge Gao; Yanan Wu; Jun Qu; Zhiwei Mao; Liang Tan; Jing Lu; Mingyan Dai; Jiansheng Wang; Jie Yang

Energy Reports (Nov 2021)

Research on three-phase four-wire NPC converter for Tokamak low-frequency resonance suppressor

Xianshun Shen,
Ge Gao,
Yanan Wu,
Jun Qu,
Zhiwei Mao,
Liang Tan,
Jing Lu,
Mingyan Dai,
Jiansheng Wang,
Jie Yang

Affiliations

Xianshun Shen: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China; University of Science and Technology of China, Hefei 230026, China
Ge Gao: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China; University of Science and Technology of China, Hefei 230026, China
Yanan Wu: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China; Corresponding author.
Jun Qu: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China; University of Science and Technology of China, Hefei 230026, China
Zhiwei Mao: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
Liang Tan: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China; University of Science and Technology of China, Hefei 230026, China
Jing Lu: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
Mingyan Dai: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China; University of Science and Technology of China, Hefei 230026, China
Jiansheng Wang: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China; Anhui University, Hefei 230601, China
Jie Yang: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China; University of Science and Technology of China, Hefei 230026, China

Journal volume & issue: Vol. 7
pp. 48 – 55

Abstract

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During the operation of Tokamak power system, a large number of low frequency harmonic currents with complex spectrum will be generated. Low-frequency resonance suppressor is an effective solution to suppress this low-frequency harmonic currents. The low-frequency harmonic suppression theory of low-frequency resonance suppressor is analyzed in this paper. Meanwhile, the state space equation of three-phase four-wire neutral-point-clamped rectifier is established in the LFRS. According to the mathematical model, the double closed-loop and zero sequence current control strategies are proposed to improve power factor operation on AC side and neutral point potential balance control on DC side of three-phase four-wire converter. The results show the correctness of the theoretical analysis and provide a technical reference for suppression of low-frequency harmonics of other Tokamak devices.

Published in Energy Reports

ISSN: 2352-4847 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: http://www.journals.elsevier.com/energy-reports/

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