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Method for Suppressing Second-order Harmonic Current of Grid-connected Inverter
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Jingjing ZHU  Student Member, CPSS, Min CHEN  Senior Member, CPSS, Sheng REN, Hongyang LI
Journal of Power Supply | 2025, 23(5) : 69 - 78
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Journal of Power Supply | 2025, 23(5): 69-78
• DC-AC Inverters •
Method for Suppressing Second-order Harmonic Current of Grid-connected Inverter
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Jingjing ZHU  Student Member, CPSS, Min CHEN  Senior Member, CPSS, Sheng REN, Hongyang LI
Affiliations
  • School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
Published: 2025-09-30 doi: 10.13234/j.issn.2095-2805.2025.5.69
Outline
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Harmonic pollution is one of the key problems restricting the grid connection of new energy sources. There are many factors that lead to an increase in current harmonics of grid-connected inverters, including the harmonic voltage of the grid and the sampling error of voltage and current signals in the grid-connected inverter system. On the basis, the principle of voltage sampling error and current sampling error of the grid-connected inverter system affecting the 2nd-order harmonic current of the inverter is analyzed, and a 2nd-order harmonic current suppression method based on high-precision harmonic sampling and 2nd-order harmonic current three-phase double-frequency rotation dq feedback is studied. In addition, a model of the 2nd-order harmonic current suppression loop is established, a design method for the parameters of the 2nd-order harmonic current suppression loop is given, and the expression of suppression effect is deduced. Finally, the proposed method was verified by experimental results of a 100 kW prototype.

Grid-connected inverter  /  harmonic suppression  /  2nd-order harmonic  /  loop design
朱晶菁中国电源学会学生会员, 陈敏中国电源学会高级会员, 任昇, 李鸿阳. 并网逆变器二次谐波电流的抑制方法. 电源学报, 2025 , 23 (5) : 69 -78 . DOI: 10.13234/j.issn.2095-2805.2025.5.69
Jingjing ZHU, Min CHEN, Sheng REN, Hongyang LI. Method for Suppressing Second-order Harmonic Current of Grid-connected Inverter[J]. Journal of Power Supply, 2025 , 23 (5) : 69 -78 . DOI: 10.13234/j.issn.2095-2805.2025.5.69
Funding
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  • National Natural Science Foundation of China(52037010)
Appendix
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Year 2025 volume 23 Issue 5
50
9
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Article Info
doi: 10.13234/j.issn.2095-2805.2025.5.69
  • Receive Date：2022-08-30
  • Online Date：2026-10-26
  • Published：2025-09-30
Article Data
Affiliations
History
  • Received：2022-08-30
  • Revised：2022-10-29
  • Accepted：2022-11-06
Funding
National Natural Science Foundation of China(52037010)
Affiliations
    School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
References
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