A Composite Selective Harmonic Elimination Model Predictive Control for Seven-Level Hybrid-Clamped Inverters With Optimal Switching Patterns

Wu, MZ (通讯作者),Univ Alberta, Dept Elect & Comp Engn, Edmonton, AB T6G 1H9, Canada.
2021
A composite strategy that combines selective harmonic elimination pulsewidth modulation (SHE-PWM) and model predictive control (MPC) for seven-level hybrid-clamped (7L-HC) inverters is presented in this article. By introducing the unified SHE formulation, all seven-level switching patterns and corresponding switching angles can be obtained simultaneously. Therefore, the optimal switching pattern with the designed optimization goal of each modulation index can be evaluated, and the best expected output performance is achieved. For the voltage balancing issue of 7L-HC, MPC is adopted to control the dc-link and flying capacitors. After receiving the output voltage level signal from the SHE-PWM modulator, the optimal switching state that belongs to the received output voltage level that minimizes the cost function is selected by the MPC module, where the cost function is designed to simultaneously balance capacitor voltages and reduce the switching frequency. Dynamic weighting factors with variable band limits are also proposed to further improve the system performance. The potential industrial application of high-power motor drive is used as an example in designing the key parameters for both SHE and MPC parts. Simulation and experimental results confirmed the validity of this composite SHE-MPC strategy in reducing the switching frequency and improving harmonic performances while keeping capacitor voltages well balanced.
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷号:36|期号:1|页码:274-284
ISSN:0885-8993|收录类别:SCIE
DOI
10.1109/TPEL.2020.3002968
来源机构
University of Alberta; University of New South Wales Sydney; China University of Mining & Technology
EISSN
1941-0107
出版年
2021
资助信息
This work was supported in part by the Natural Sciences and Engineering Research Council of Canada (NSERC) and in part by the National Natural Science Foundation of China underGrants 61973307 and 61936008.
语种
英语
WOS学科分类
Engineering, Electrical & Electronic
被引频次(WOS)
18
180天使用计数
7
2013以来使用计数
37
被引更新日期
2023-02-19
关联机构
兰州大学循证社会科学中心
关键词
Switches Capacitors Voltage control Modulation Harmonic analysis Switching frequency Topology Model predictive control (MPC) multilevel inverter selective harmonic elimination (SHE) voltage balancing
资助机构
Natural Sciences and Engineering Research Council of Canada (NSERC) National Natural Science Foundation of China [61973307, 61936008]