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过移相和欠移相对12脉波整流系统的影响及抑制措施
高 蕾, 孟凡刚, 杨世彦, 杨 威
哈尔滨工业大学 电气工程及自动化学院,黑龙江 哈尔滨 150001
摘要:
根据自耦变压器的绕组结构和电气量之间的关系,分析了移相角与绕组匝数的关系。定量分析了移相角与输入电流总谐波畸变率和输出电压纹波系数之间的关系,分析表明过移相和欠移相均会使输入电流总谐波畸变率和输出电压纹波系数增大;为抑制输入电流中的非特征次谐波,提出了谐波抑制电抗器和相间电抗器相结合的12脉波整流系统,该系统结构简单、对称性好。仿真和实验结果表明了理论分析的正确性,所提多脉波整流系统可有效抑制输入电流中的非特征次谐波,减少过移相和欠移相对12脉波整流系统的影响。
关键词:  12脉波整流系统  过移相  欠移相  谐波抑制电抗器  谐波分析
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Influence of over/under phase-shift on 12-pulse rectifier system and its countermeasures
GAO Lei, MENG Fangang, YANG Shiyan, YANG Wei
School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin 150001,China
Abstract:
The relationship between phase -shift angle and winding turns is analyzed according to the winding structure of autotransformer and the relationship among its electrical variables. The relationship between the phase-shift angle and the input current THD(Total Harmonic Distortion) or output voltage ripple coefficient is analyzed,which shows that both over and under phase-shift may lead to the increase of input current THD and output voltage ripple coefficient. In order to suppress the non-characteristic subharmonics of input current,a 12-pulse rectifier system composed of one harmonic suppression reactor and two inter-phase reactors,with simple system structure and excellent symmetry,is proposed. Simulative and experimental results show that,the non-characteristic subharmonics of input current are effectively suppressed and the influence of over/under phase-shift is greatly reduced,verifying the correctness of theoretical analysis.
Key words:  12-pulse rectifier  over phase-shift  under phase-shift  harmonic suppression reactor  harmonic analysis

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