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三电平牵引逆变器电流谐波最小调制策略
Current harmonic minimum PWM strategy for traction inverter based on three-level topology
- 机车电传动 2024年第2期 页码：33-42
- 作者机构：
1.北京纵横机电科技有限公司，北京 100094
2.北京交通大学 电气工程学院，北京 100044
- 作者简介：
李赵烊，男，博士研究生，主要从事多电平牵引传动系统方面的研究； E-mail: 23111455@bjtu.edu.cn
- 基金信息：中国国家铁路集团有限公司科技研究开发计划(P2023J004);中国铁道科学研究院集团有限公司科研项目重大课题(2023YJ242)
DOI：10.13890/j.issn.1000-128X.2024.02.004
中图分类号： TM464纸质出版日期：2024-03-10，
收稿日期：2023-12-18，
修回日期：2024-02-20，
- 稿件说明：
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蒋威, 李赵烊, 殷振环, 等. 三电平牵引逆变器电流谐波最小调制策略[J]. 机车电传动, 2024(2): 33-42.
JIANG Wei, LI Zhaoyang, YIN Zhenhuan, et al. Current harmonic minimum PWM strategy for traction inverter based on three-level topology[J]. Electric drive for locomotives,2024(2): 33-42.
蒋威, 李赵烊, 殷振环, 等. 三电平牵引逆变器电流谐波最小调制策略[J]. 机车电传动, 2024(2): 33-42. DOI：10.13890/j.issn.1000-128X.2024.02.004.
JIANG Wei, LI Zhaoyang, YIN Zhenhuan, et al. Current harmonic minimum PWM strategy for traction inverter based on three-level topology[J]. Electric drive for locomotives,2024(2): 33-42. DOI：10.13890/j.issn.1000-128X.2024.02.004.
摘要
使用三电平变流器拓扑结构，可有效降低单个开关器件所承受的电压等级，为碳化硅（SiC）器件在高压大功率牵引变流器领域的应用提供解决方案。文章根据牵引逆变器的应用需求，针对三电平二极管中点箝位（Neutral-Point-Clamped，NPC）型逆变器拓扑的电流谐波最小脉宽调制（Current harmonic minimum pulse width modulation，CHMPWM）策略开展了研究，通过求解不同开关角个数下开关角度随调制比的变化曲线，实现了三电平逆变器脉冲数较低情况下的电流谐波的总体优化，理论分析了CHMPWM不同开关角个数下的各次电流谐波和加权总谐波畸变（weighted total harmonic distortion，WTHD）特征，介绍了CHMPWM的脉冲产生方式及基于定子磁链偏差矢量的调制模式切换方法。最后，利用小功率试验平台对三电平逆变器CHMPWM及调制模式切换策略进行了试验研究，结果表明，三电平逆变器CHMPWM策略具有较好的动态和稳态性能，能满足牵引逆变器的技术应用需求。
Abstract
The three-level converter topology stands out as an effective way to reduce the voltage level borne by individual switching devices
which provides a solution for the application of silicon carbide (SiC) devices in high-voltage and high-power traction converters. This paper explores the current harmonic minimum pulse width modulation (CHMPWM) strategy based on the three-level diode neutral-point-clamped (NPC) inverter topology
tailored to meet the specific application requirements of traction inverters. Through a solving process
this study generated the curve of switching angle variations with modulation ratios at different numbers of switching angles
leading to overall optimization of current harmonics under low pulse counts of three-level inverters. Subsequent theoretical analysis revealed the characteristics of current harmonics at diverse orders and the weighted total harmonic distortion (WTHD) at different numbers of switching angles within the CHMPWM framework. Further exploration in this study delved into the pulse generation method of CHMPWM and the modulation mode switching method based on the flux linkage deviation vector of stators. In addition
experimental research was carried out on a small-power experimental platform
to verify the three-level inverter CHMPWM and modulation mode switching strategy. The experimental results showcased the good dynamic and steady performance of the three-level inverter CHMPWM strategy
demonstrating its suitability for the technical application requirements of traction inverters.
关键词
三电平逆变器脉宽调制电流谐波最小同步调制调制切换
Keywords
three-level inverterpulse width modulationcurrent harmonic minimumsynchronous modulationmodulation switching
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