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Multi-objective Optimization Algorithm for Three-level Inverter Based on Modified DPWM Modulation Method
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Jin CHAI1, Weisheng WANG2, Jiaxuan LU3, Tong LIU  Member, CPSS4, Alian CHEN  Senior Member, CPSS3
Journal of Power Supply | 2025, 23(4) : 79 - 88
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Journal of Power Supply | 2025, 23(4): 79-88
• DC-AC Inverters •
Multi-objective Optimization Algorithm for Three-level Inverter Based on Modified DPWM Modulation Method
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Jin CHAI1, Weisheng WANG2, Jiaxuan LU3, Tong LIU  Member, CPSS4, Alian CHEN  Senior Member, CPSS3
Affiliations
  • 1.Engineering Training Center, Shandong University, Ji’nan 250061, China
  • 2.Shandong Aotai Electric Co., Ltd., Ji’nan 250104, China
  • 3.School of Control Science and Engineering, Shandong University, Ji’nan 250061, China
  • 4.School of Electrical Engineering, Shandong University, Ji’nan 250061, China
Published: 2025-07-30 doi: 10.13234/j.issn.2095-2805.2025.4.79
Outline
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Three-level inverters have attracted widespread attention in medium- and high-voltage applications. However, traditional continuous pulse width modulation (CPWM) methods suffer from drawbacks such as high switching losses, significant common-mode voltage (CMV) fluctuations and neutral-point voltage imbalance. To solve these problems, based on the analysis of the generation mechanism for CMV, the suppression conditions for CMV are derived based on discrete pulse width modulation (DPWM), and a modified DPWM modulation strategy is proposed, which can reduce switching losses under DPWM0~DPWM3 modulations while suppressing CMV. In addition, based on the proposed DPWM modulation strategy, the control method for neutral-point voltage is explored, and the multi-objective optimal control of the three-level inverter is realized ultimately. Simulation and experimental results verified the validity of the proposed DPWM control strategy.

Three-level inverter  /  common-mode voltage (CMV)  /  discrete pulse width modulation (DPWM)  /  neutral-point voltage balance
柴锦, 王伟胜, 卢家璇, 刘通中国电源学会会员, 陈阿莲中国电源学会高级会员. 基于改进DPWM的三电平逆变器多目标优化算法. 电源学报, 2025 , 23 (4) : 79 -88 . DOI: 10.13234/j.issn.2095-2805.2025.4.79
Jin CHAI, Weisheng WANG, Jiaxuan LU, Tong LIU, Alian CHEN. Multi-objective Optimization Algorithm for Three-level Inverter Based on Modified DPWM Modulation Method[J]. Journal of Power Supply, 2025 , 23 (4) : 79 -88 . DOI: 10.13234/j.issn.2095-2805.2025.4.79
Funding
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  • National Natural Science Foundation of China(U2006222)
  • Ministry of Education Industry-Academic Cooperation Collaborative Education Project(220605332142344; 220501464052410)
Appendix
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Year 2025 volume 23 Issue 4
79
19
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Article Info
doi: 10.13234/j.issn.2095-2805.2025.4.79
  • Receive Date：2024-03-26
  • Online Date：2026-10-26
  • Published：2025-07-30
Article Data
Affiliations
History
  • Received：2024-03-26
  • Revised：2024-04-26
  • Accepted：2024-05-06
Funding
National Natural Science Foundation of China(U2006222)
Ministry of Education Industry-Academic Cooperation Collaborative Education Project(220605332142344; 220501464052410)
Affiliations
    1.Engineering Training Center, Shandong University, Ji’nan 250061, China
    2.Shandong Aotai Electric Co., Ltd., Ji’nan 250104, China
    3.School of Control Science and Engineering, Shandong University, Ji’nan 250061, China
    4.School of Electrical Engineering, Shandong University, Ji’nan 250061, China
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https://castjournals.cast.org.cn/joweb/dyxb/EN/10.13234/j.issn.2095-2805.2025.4.79
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