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A Sine-wave-like Modulation Method for Cascaded H-bridge-based Soft Open Point
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Yan TAO1, 2, Chenqing WANG1, 2, Xiangping KONG1, 2, Jinjiao LIN1, 2, Junchao ZHENG1, 2, Zijun BIN1, 2
Journal of Power Supply | 2026, 24(5) : 180 - 188
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Journal of Power Supply | 2026, 24(5): 180-188
• Power Electronic Dominated Power Systems •
A Sine-wave-like Modulation Method for Cascaded H-bridge-based Soft Open Point
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Yan TAO1, 2, Chenqing WANG1, 2, Xiangping KONG1, 2, Jinjiao LIN1, 2, Junchao ZHENG1, 2, Zijun BIN1, 2
Affiliations
  • 1.Jiangsu Electric Power Test Research Institute Co., Ltd., Nanjing 211100, China
  • 2.Electric Power Research Institute, State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211100, China
Published: 2026-05-30 doi: 10.13234/j.issn.2095-2805.2026.5.180
Outline
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The soft open point (SOP), as a sort of promising flexible power electronic device in future smart distribution network, can take the place of normal open point to achieve flexible interconnection and power regulation. The shared module soft open point (SMSOP), as a new flexible interconnection topology, has the advantages of high efficiency, small size and low cost. However, SMSOP is prone to overmodulation when using conventional pulse width modulation (PWM) and has high losses if the shared module accounts for more. A new sine-wave-like modulation method is proposed. The sine-wave-like modulation adds a square-wave platform on the basis of the sine-wave modulation. Sine-wave modulation is used at the start and end of each half-cycle to prevent over-modulation at zero-crossing time; square-wave modulation is used in the middle to reduce the switching losses of the shared modules. Finally, the correctness and effectiveness of the new modulation strategy are verified by building a three-phase experimental platform.

Flexible interconnection  /  distribution network  /  shared module  /  sine-wave-like modulation
陶艳, 王晨清, 孔祥平, 林金娇, 郑俊超, 宾子君. 基于级联H桥的柔性互联类正弦调制方法. 电源学报, 2026 , 24 (5) : 180 -188 . DOI: 10.13234/j.issn.2095-2805.2026.5.180
Yan TAO, Chenqing WANG, Xiangping KONG, Jinjiao LIN, Junchao ZHENG, Zijun BIN. A Sine-wave-like Modulation Method for Cascaded H-bridge-based Soft Open Point[J]. Journal of Power Supply, 2026 , 24 (5) : 180 -188 . DOI: 10.13234/j.issn.2095-2805.2026.5.180
Funding
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  • Technology Project of Jiangsu Electric Power Test Research Institute Co., Ltd.(DSY202307)
Appendix
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Year 2026 volume 24 Issue 5
47
10
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Article Info
doi: 10.13234/j.issn.2095-2805.2026.5.180
  • Receive Date：2024-04-23
  • Online Date：2026-10-29
  • Published：2026-05-30
Article Data
Affiliations
History
  • Received：2024-04-23
  • Revised：2024-05-24
  • Accepted：2024-06-16
Funding
Technology Project of Jiangsu Electric Power Test Research Institute Co., Ltd.(DSY202307)
Affiliations
    1.Jiangsu Electric Power Test Research Institute Co., Ltd., Nanjing 211100, China
    2.Electric Power Research Institute, State Grid Jiangsu Electric Power Co., Ltd., Nanjing 211100, China
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