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A Neutral Point Potential Balancing Strategy for a Three-level Inverter Based on Full-range Seven-segment SVPWM
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Guotao YANG, Dongfang HU, Jiaming ZHANG, Liqiang WEN, Lisi TIAN
Electric Drive | 2025, 55(7) : 3 - 12
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Electric Drive | 2025, 55(7): 3-12
A Neutral Point Potential Balancing Strategy for a Three-level Inverter Based on Full-range Seven-segment SVPWM
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Guotao YANG, Dongfang HU, Jiaming ZHANG, Liqiang WEN, Lisi TIAN
Affiliations
  • School of Electrical Engineering，China University of Mining and Technology，Xuzhou 221116，Jiangsu，China
Published: 2025-07-20 doi: 10.19457/j.1001-2095.dqcd25854
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Space vector pulse width modulation（SVPWM）strategy is one of the key technologies for three-level inverters.However，conventional three-level SVPWM often experiences neutral point potential（NPP）oscillation and high switching loss when addressing the neutral point potential balancing issue.To tackle this challenge，firstly，the fundamental principles of the traditional nearest three vector（NTV）synthesis strategy and the virtual space vector pulse width modulation（VSVPWM）strategy were reviewed. And then，the drawbacks of the NTV approach based on the conventional region partitioning method was analyzed. A dynamic partitioning method was proposed to resolve the neutral point potential offset caused by conventional partitioning.Furthermore，to counteract the NPP oscillation of the NTV under high modulation，a strategy that employs a synthesis of four-effective voltage vectors was introduced. Compared to VSVPWM，the proposed strategy significantly reduced the inverter's switching loss.Ultimately，the effectiveness and superiority of the proposed algorithm were validated through experimental results.

three-level inverter  /  neutral point potential（NPP）balance  /  switching loss  /  seven-segment  /  dynamic partition
Guotao YANG, Dongfang HU, Jiaming ZHANG, Liqiang WEN, Lisi TIAN. A Neutral Point Potential Balancing Strategy for a Three-level Inverter Based on Full-range Seven-segment SVPWM[J]. Electric Drive, 2025 , 55 (7) : 3 -12 . DOI: 10.19457/j.1001-2095.dqcd25854
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Year 2025 volume 55 Issue 7
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doi: 10.19457/j.1001-2095.dqcd25854
  • Receive Date：2024-04-19
  • Online Date：2025-10-29
  • Published：2025-07-20
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  • Received：2024-04-19
  • Revised：2024-05-09
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    School of Electrical Engineering，China University of Mining and Technology，Xuzhou 221116，Jiangsu，China
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