高速磁悬浮牵引系统大功率三电平整流器特定谐波消除脉宽调制策略

doi:10.19595/j.cnki.1000-6753.tces.211881

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摘要高速磁悬浮列车牵引供电系统采用大功率背靠背三电平有源中点钳位（ANPC）变流器。为在低开关频率下降低网侧电流谐波,基于三相静止坐标系的线性扩张状态观测器（LESO）和比例谐振（PR）控制,提出一种适用于大功率三电平整流器的特定谐波消除脉宽调制（SHEPWM）策略,并设计相应的死区补偿方法。高速磁悬浮列车在运行过程中,定子段换步会造成逆变侧负载剧烈变化,从而引起网侧电流的大幅度改变。考虑到SHEPWM动态性能较差,提出一种在换步阶段对离线计算的开关角进行在线修正的方法,可提高基于SHEPWM整流器闭环控制的动态调节能力。最后,利用背靠背三电平ANPC变流器实验平台进行实验,验证了SHEPWM提高网侧电流质量的优越性以及所提策略提高SHEPWM闭环控制动态性能的有效性。

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关键词 ：高速磁悬浮列车, 三电平有源中点钳位整流器, 特定谐波消除脉宽调制, 线性扩张状态观测器, 动态性能

Abstract：The traction power supply system of high-speed maglev train adopts high power back-to-back three-level active neutral point clamped (3L-ANPC) converter. In order to reduce the harmonics of grid-side current at low switching frequency, a selective harmonic elimination pulse width modulation (SHEPWM) strategy suitable for high power 3L-rectifiers was proposed based on linear extended state observer (LESO) and proportional resonance (PR) control in the three-phase static coordinate system. The corresponding dead time compensation method was also designed. During the operation of high-speed maglev train, the load on the inverter side would change sharply due to the changeover of the stator segment, resulting in a significant change in the grid-side current. Considering the poor dynamic performance of SHEPWM, an on-line correction method for the off-line calculated switching angle sequence in the changeover stage was proposed, which could improve the dynamic regulation ability of the rectifier closed-loop control based on SHEPWM. Finally, the back-to-back 3L-ANPC experimental platform was utilized to verify the superiority of SHEPWM in improving the grid-side current quality and the effectiveness of the proposed strategy to improve the dynamic performance of SHEPWM closed-loop control.

Key words： High-speed maglev train three-level active neutral point clamped (3L-ANPC) rectifier selective harmonic elimination pulse width modulation (SHEPWM) linear extended state observer (LESO) dynamic performance

收稿日期: 2021-11-18

PACS:

TM461

基金资助:国家重点研发计划高速磁浮交通系统关键技术研究课题（2016YFB1200602-19）和国家自然科学基金（51907188）资助项目

通讯作者: 葛琼璇,女,1967年生,研究员,博士生导师,研究方向为高压大功率变流器控制技术、高性能电机牵引控制技术。E-mail: gqx@mail.iee.ac.cn

作者简介: 赵牧天,男,1995年生,博士研究生,研究方向为大功率变流器与直线电机牵引控制技术。E-mail: zhaomutian@mail.iee.ac.cn

引用本文:

赵牧天, 葛琼璇, 张波, 范恩泽, 朱进权. 高速磁悬浮牵引系统大功率三电平整流器特定谐波消除脉宽调制策略[J]. 电工技术学报, 2022, 37(16): 4180-4192. Zhao Mutian, Ge Qiongxuan, Zhang Bo, Fan Enze, Zhu Jinquan. Selective Harmonic Elimination Pulse Width Modulation for High Power Three-Level Rectifier of High-Speed Maglev Traction System. Transactions of China Electrotechnical Society, 2022, 37(16): 4180-4192.

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