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

Energy Reports

Liang Tan¹  Mingyan Dai²  Ge Gao²  Jun Qu²  Jie Yang³  Jing Lu³  Yanan Wu³  Jiansheng Wang³  Zhiwei Mao³  Xianshun Shen³ 

[1] Corresponding author.;University of Science and Technology of China, Hefei 230026, China;Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China;

关键词: Tokamak power system;    Low-frequency resonance suppressor;    Three-phase four-wire converter;    Control strategy;   

DOI  :  

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown