PWM Modulation Optimization and Power Balance Control Strategy of CHB Multilevel Inverter

被引：0
|
作者：
Ye M. [1 ]
Ren W. [1 ]
Li S. [1 ]
Wei Q. [1 ]
Song G. [1 ]
Peng R. [1 ]
机构：
[1] School of Electrical and Automation Engineering, East China Jiaotong University, Nanchang
来源：
Gaodianya Jishu/High Voltage Engineering | 2020年 / 46卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Carrier reconstruction; Cascaded H-bridge multilevel inverter; Hybrid multicarrier pulse width modulation; Power balance; Total harmonic distortion;
D O I：
10.13336/j.1003-6520.hve.20200302011
中图分类号：
学科分类号：
摘要：
In response to the problem of unbalanced output power of cascaded H-bridge (CHB) units under the carrier disposition (CD) modulation strategy of the cascaded H-bridge multi-level inverter, and the problem of the high total harmonic distortion (THD) of line voltage under the carrier phase shift pulse width modulation (CPS-PWM) modulation strategy, we proposed a hybrid multi-carrier pulse width modulation strategy based on power balance. In this strategy, a carrier period of in-phase disposition pulse width modulation (IPD-PWM) strategy is taken as the basic unit, and the arrangement of triangular carriers in the vertical direction is changed through periodic cycling, thus the power balance of H-bridge units in the full modulation ratio range as CPS-SPWM strategy is realized. Meanwhile, when the output voltage waveform of IPD-PWM is unchanged, the harmonic spectrum of the output voltage is ensured to be identical with that of the IPD-PWM strategy, which effectively improves the harmonic performance of the output line voltage of the inverters, thus the problems of unbalanced output power and high THD of the interconnection units at all levels can be solved. Finally, the correctness of the strategy is verified by simulation and experimental results. © 2020, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：3800 / 3809
页数：9
相关论文
共 16 条
  • [1] JAHAN H K, ABAPOUR M, ZARE K., Switched-capacitor-based single-source cascaded H-bridge multilevel inverter featuring boosting ability, IEEE Transactions on Power Electronics, 34, 2, pp. 1113-1124, (2018)
  • [2] YE Manyuan, XIAO Yunhuang, KANG Xiang, Et al., Power balance control scheme of cascaded multilevel inverters with hybrid H-bridge units, Electric Machines and Control, 22, 12, pp. 54-61, (2018)
  • [3] DAI Yunzhong, HE Kairui, DU Chengmao, Et al., Discrete model simplification and dynamic behavior of LC-filter-based inverter with H6-type, High Voltage Engineering, 43, 10, pp. 3313-3321, (2017)
  • [4] JAMMALA V, YELLASIRI S, PANDA A K., Development of a new hybrid multilevel inverter using modified carrier SPWM switching strategy, IEEE Transactions on Industrial Electronics, 33, 10, pp. 8192-8197, (2018)
  • [5] TANG Min'an, GAO Xiaohong, Grid-connected control of microgrid with photovoltaic and energy storage systems under unbalanced grid voltage conditions, High Voltage Engineering, 45, 6, pp. 1879-1888, (2019)
  • [6] SU Lijie, CHANG Hengzhou, YANG Guangde, Et al., Hybrid frequency carrier modulation technique for hybrid inverter, High Voltage Engineering, 43, 1, pp. 30-37, (2017)
  • [7] YE Manyuan, KANG Lixuan, CHEN Le, Et al., Optimizes modulation strategy for cascaded multi-level inverter, High Voltage Engineering, 45, 11, pp. 3612-3619, (2019)
  • [8] YE Manyuan, NIE Yu, Research on the control of three-phase cascaded H-bridge photovoltaic grid connection, Journal of East China Jiaotong University, 36, 2, pp. 99-104, (2019)
  • [9] MCGRATH B P, HOLMES D G., Multicarrier PWM strategies for multilevel inverters, IEEE Transactions on Industrial Electronics, 49, 4, pp. 858-867, (2002)
  • [10] LI Y F, WANG Y, LI B Q., Generalized theory of phase-shifted carrier PWM for cascaded H-bridge converters and modular multilevel converters, IEEE Journal of Emerging and Selected Topics in Power Electronics, 4, 2, pp. 589-605, (2016)
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