Improved Multilevel PWM Strategy Based on Control Carrier Freedom

Qiao He; Zhao Ziqi; Liu Ming

doi:doi:10.11648/j.sd.20221005.13

| Peer-Reviewed

Improved Multilevel PWM Strategy Based on Control Carrier Freedom

Qiao He, Zhao Ziqi, Liu Ming

Published in Science Discovery (Volume 10, Issue 5)

Received: 30 August 2022 Accepted: 22 September 2022 Published: 28 September 2022

Views: Downloads:

Download PDF

Share This Article

Twitter
Linked In
Facebook

Abstract

Cascade multilevel inverte are widely concerned for it large number of levels, minimizes the of switching devices, large transmission power, and so on. However, the output waveform quality depends on the selection of pulse width modulation strategy. With the increase of the number of cascaded units and the output voltage level, it is of great significance to increase the utilization ratio of DC side voltage under carrier phase shift pulse width modulation (CPS-PWM) strategy and to improve the poor harmonic erformance in low-key system. Aiming at these two problems, this paper proposes an improved multilevel PWM modulation strategy based on the control carrier degree of freedom. The strategy according controls the combination of carrier degrees of freedom, based on the traditional CPS-PWM modulation strategy and combined with the carrier shape characteristics of APOD-PWM modulation strategy, the original triangular carrier is reconstructed to generate an improved carrier and applying to the modulation of multilevel inverter, which can resolve effectively the problems of poor harmonic performance and low DC voltage utilization rate of the output voltage when the modulation is low, in addition, it retains the advantage of the working stress of each switch tube is also the same and the power balance of each cascaded unit of the CPS-PWM strategy. In this paper, the principle and amplitude of output voltage of the improved carrier and CPS-PWM modulation strategy are compared and analyzed, and the strategy is verified by simulation and experiment.

Published in	Science Discovery (Volume 10, Issue 5)
DOI	10.11648/j.sd.20221005.13
Page(s)	292-299
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2022. Published by Science Publishing Group

Keywords

Cascaded Multilevel Inverter, DC Voltage Utilization, Improved Carrier, Modulation Strategy

References

[1]	叶满园,吴韩.混合CHB逆变器优化调制策略的研究[J].电力电子技术, 2019, 53 (09):95-98。
[2]	王要强,袁艺森,陈天锦,等.T型开关电容可扩展多电平逆变器[J].电工技术学报, 2020, 35 (24): 5115-5124。
[3]	吴学智,祁静静,刘京斗，等.采用开关电容/开关电感的多电平逆变器拓扑研究综述[J].中国电机工程学报, 2020, 40 (01): 222-233+389。
[4]	秦佳昕,宋文祥,张琪.飞跨电容三电平逆变器空间矢量调制及电容电压平衡控制[J].微电机, 2019, 52 (09): 56-61。
[5]	叶伟伟,聂子玲,朱俊杰,等.基于IGBT行为模型的有源中点钳位五电平变换器损耗特性分析[J].电工技术学报, 2021, 36 (S1): 218-230。
[6]	E. Babaei, S. Laali and S. Alilu, "Cascaded Multilevel Inverter With Series Connection of Novel H-Bridge Basic Units," in IEEE Transactions on Industrial Electronics, vol. 61, no. 12, pp. 6664-6671, Dec. 2014.
[7]	G. Sha et al., "Research on Multi-Port DC-DC Converter Based on Modular Multilevel Converter and Cascaded H Bridges for MVDC Applications," in IEEE Access, vol. 9, pp. 95006-95022, 2021.
[8]	G. S. A. Thankachy and Shiny G., "Phase Shifted Carrier Modulation technique for Modular Multilevel Inverter," 2016 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), Trivandrum, India, 2016, pp. 1-6. doi: 10.1109/PEDES.2016.7914340.
[9]	Li Yufei, Wang Yue, Ben Q Li. Generalized theory of phase-shifted carrier PWM for cascaded H-bridge converters and modular multilevel converters [J]. IEEE Journal of Emerging and Selected Topics in Power Electronics, 2016, 4 (2): 589-605.
[10]	白志红,周玉虎.模块化多电平换流器的载波层叠脉宽调制策略分析与改进[J].电力系统自动化,2018,42 (21): 139-144。
[11]	孙毅超,赵剑锋,季振东.并网型级联H桥变换器直流电压平衡和功率均衡控制策略[J].电力自动化设备, 2014, 34 (01): 55-60。
[12]	P. Pejovic and Z. Janda, "An analysis of three-phase low-harmonic rectifiers applying the third-harmonic current injection," in IEEE Transactions on Power Electronics, vol. 14, no. 3, pp. 397-407, May 1999.
[13]	杨剑锋,杨航,赵恬.级联多电平逆变器CPS-TPWM策略研究[J].南京理工大学学报, 2017, 41 (05): 596-601。
[14]	WEI S M, WU B, LI F H, et al. A general space vector PWM control algorithm for multilevel inverters [C]// Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003 APEC.Miami Beach, FL, USA: IEEE, 2003: 562—568.
[15]	何梨梨, 帅智康, 单佳佳. MMC的多载波调制策略对比分析[J].电源学报, 2019, 17 (05): 56-64. DOI: 10.13234/j.issn.2095-2805.2019.5.56。

Cite This Article

Plain Text BibTeX RIS

APA Style

Qiao He, Zhao Ziqi, Liu Ming. (2022). Improved Multilevel PWM Strategy Based on Control Carrier Freedom. Science Discovery, 10(5), 292-299. https://doi.org/10.11648/j.sd.20221005.13

Copy | Download

ACS Style

Qiao He; Zhao Ziqi; Liu Ming. Improved Multilevel PWM Strategy Based on Control Carrier Freedom. Sci. Discov. 2022, 10(5), 292-299. doi: 10.11648/j.sd.20221005.13

Copy | Download

AMA Style

Qiao He, Zhao Ziqi, Liu Ming. Improved Multilevel PWM Strategy Based on Control Carrier Freedom. Sci Discov. 2022;10(5):292-299. doi: 10.11648/j.sd.20221005.13

Copy | Download

@article{10.11648/j.sd.20221005.13,
  author = {Qiao He and Zhao Ziqi and Liu Ming},
  title = {Improved Multilevel PWM Strategy Based on Control Carrier Freedom},
  journal = {Science Discovery},
  volume = {10},
  number = {5},
  pages = {292-299},
  doi = {10.11648/j.sd.20221005.13},
  url = {https://doi.org/10.11648/j.sd.20221005.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sd.20221005.13},
  abstract = {Cascade multilevel inverte are widely concerned for it large number of levels, minimizes the of switching devices, large transmission power, and so on. However, the output waveform quality depends on the selection of pulse width modulation strategy. With the increase of the number of cascaded units and the output voltage level, it is of great significance to increase the utilization ratio of DC side voltage under carrier phase shift pulse width modulation (CPS-PWM) strategy and to improve the poor harmonic erformance in low-key system. Aiming at these two problems, this paper proposes an improved multilevel PWM modulation strategy based on the control carrier degree of freedom. The strategy according controls the combination of carrier degrees of freedom, based on the traditional CPS-PWM modulation strategy and combined with the carrier shape characteristics of APOD-PWM modulation strategy, the original triangular carrier is reconstructed to generate an improved carrier and applying to the modulation of multilevel inverter, which can resolve effectively the problems of poor harmonic performance and low DC voltage utilization rate of the output voltage when the modulation is low, in addition, it retains the advantage of the working stress of each switch tube is also the same and the power balance of each cascaded unit of the CPS-PWM strategy. In this paper, the principle and amplitude of output voltage of the improved carrier and CPS-PWM modulation strategy are compared and analyzed, and the strategy is verified by simulation and experiment.},
 year = {2022}
}

Copy | Download

TY  - JOUR
T1  - Improved Multilevel PWM Strategy Based on Control Carrier Freedom
AU  - Qiao He
AU  - Zhao Ziqi
AU  - Liu Ming
Y1  - 2022/09/28
PY  - 2022
N1  - https://doi.org/10.11648/j.sd.20221005.13
DO  - 10.11648/j.sd.20221005.13
T2  - Science Discovery
JF  - Science Discovery
JO  - Science Discovery
SP  - 292
EP  - 299
PB  - Science Publishing Group
SN  - 2331-0650
UR  - https://doi.org/10.11648/j.sd.20221005.13
AB  - Cascade multilevel inverte are widely concerned for it large number of levels, minimizes the of switching devices, large transmission power, and so on. However, the output waveform quality depends on the selection of pulse width modulation strategy. With the increase of the number of cascaded units and the output voltage level, it is of great significance to increase the utilization ratio of DC side voltage under carrier phase shift pulse width modulation (CPS-PWM) strategy and to improve the poor harmonic erformance in low-key system. Aiming at these two problems, this paper proposes an improved multilevel PWM modulation strategy based on the control carrier degree of freedom. The strategy according controls the combination of carrier degrees of freedom, based on the traditional CPS-PWM modulation strategy and combined with the carrier shape characteristics of APOD-PWM modulation strategy, the original triangular carrier is reconstructed to generate an improved carrier and applying to the modulation of multilevel inverter, which can resolve effectively the problems of poor harmonic performance and low DC voltage utilization rate of the output voltage when the modulation is low, in addition, it retains the advantage of the working stress of each switch tube is also the same and the power balance of each cascaded unit of the CPS-PWM strategy. In this paper, the principle and amplitude of output voltage of the improved carrier and CPS-PWM modulation strategy are compared and analyzed, and the strategy is verified by simulation and experiment.
VL  - 10
IS  - 5
ER  -

Copy | Download

Author Information

Qiao He

Faculty of Electrical and Control Engineering, Liaoning Technical University, Huludao, China
Zhao Ziqi

Faculty of Electrical and Control Engineering, Liaoning Technical University, Huludao, China
Liu Ming

College of Mathematics and Computer, Chaoyang Teachers College, Chaoyang, China

Download PDF

Sections

Plain Text BibTeX RIS

APA Style

Qiao He, Zhao Ziqi, Liu Ming. (2022). Improved Multilevel PWM Strategy Based on Control Carrier Freedom. Science Discovery, 10(5), 292-299. https://doi.org/10.11648/j.sd.20221005.13

Copy | Download

ACS Style

Qiao He; Zhao Ziqi; Liu Ming. Improved Multilevel PWM Strategy Based on Control Carrier Freedom. Sci. Discov. 2022, 10(5), 292-299. doi: 10.11648/j.sd.20221005.13

Copy | Download

AMA Style

Qiao He, Zhao Ziqi, Liu Ming. Improved Multilevel PWM Strategy Based on Control Carrier Freedom. Sci Discov. 2022;10(5):292-299. doi: 10.11648/j.sd.20221005.13

Copy | Download

@article{10.11648/j.sd.20221005.13,
  author = {Qiao He and Zhao Ziqi and Liu Ming},
  title = {Improved Multilevel PWM Strategy Based on Control Carrier Freedom},
  journal = {Science Discovery},
  volume = {10},
  number = {5},
  pages = {292-299},
  doi = {10.11648/j.sd.20221005.13},
  url = {https://doi.org/10.11648/j.sd.20221005.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sd.20221005.13},
  abstract = {Cascade multilevel inverte are widely concerned for it large number of levels, minimizes the of switching devices, large transmission power, and so on. However, the output waveform quality depends on the selection of pulse width modulation strategy. With the increase of the number of cascaded units and the output voltage level, it is of great significance to increase the utilization ratio of DC side voltage under carrier phase shift pulse width modulation (CPS-PWM) strategy and to improve the poor harmonic erformance in low-key system. Aiming at these two problems, this paper proposes an improved multilevel PWM modulation strategy based on the control carrier degree of freedom. The strategy according controls the combination of carrier degrees of freedom, based on the traditional CPS-PWM modulation strategy and combined with the carrier shape characteristics of APOD-PWM modulation strategy, the original triangular carrier is reconstructed to generate an improved carrier and applying to the modulation of multilevel inverter, which can resolve effectively the problems of poor harmonic performance and low DC voltage utilization rate of the output voltage when the modulation is low, in addition, it retains the advantage of the working stress of each switch tube is also the same and the power balance of each cascaded unit of the CPS-PWM strategy. In this paper, the principle and amplitude of output voltage of the improved carrier and CPS-PWM modulation strategy are compared and analyzed, and the strategy is verified by simulation and experiment.},
 year = {2022}
}

Copy | Download

TY  - JOUR
T1  - Improved Multilevel PWM Strategy Based on Control Carrier Freedom
AU  - Qiao He
AU  - Zhao Ziqi
AU  - Liu Ming
Y1  - 2022/09/28
PY  - 2022
N1  - https://doi.org/10.11648/j.sd.20221005.13
DO  - 10.11648/j.sd.20221005.13
T2  - Science Discovery
JF  - Science Discovery
JO  - Science Discovery
SP  - 292
EP  - 299
PB  - Science Publishing Group
SN  - 2331-0650
UR  - https://doi.org/10.11648/j.sd.20221005.13
AB  - Cascade multilevel inverte are widely concerned for it large number of levels, minimizes the of switching devices, large transmission power, and so on. However, the output waveform quality depends on the selection of pulse width modulation strategy. With the increase of the number of cascaded units and the output voltage level, it is of great significance to increase the utilization ratio of DC side voltage under carrier phase shift pulse width modulation (CPS-PWM) strategy and to improve the poor harmonic erformance in low-key system. Aiming at these two problems, this paper proposes an improved multilevel PWM modulation strategy based on the control carrier degree of freedom. The strategy according controls the combination of carrier degrees of freedom, based on the traditional CPS-PWM modulation strategy and combined with the carrier shape characteristics of APOD-PWM modulation strategy, the original triangular carrier is reconstructed to generate an improved carrier and applying to the modulation of multilevel inverter, which can resolve effectively the problems of poor harmonic performance and low DC voltage utilization rate of the output voltage when the modulation is low, in addition, it retains the advantage of the working stress of each switch tube is also the same and the power balance of each cascaded unit of the CPS-PWM strategy. In this paper, the principle and amplitude of output voltage of the improved carrier and CPS-PWM modulation strategy are compared and analyzed, and the strategy is verified by simulation and experiment.
VL  - 10
IS  - 5
ER  -

Copy | Download