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Frequency Self-adaptive and Selective-order Harmonic Repetitive Control Strategy for Grid-connected Converter under Non-ideal Grid Conditions
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Licong HU  Student Member, CPSS1, Wenzhou LU  Senior Member, CPSS1, Wei WANG2, Keliang ZHOU3, Xiaoqi ZHOU1
Journal of Power Supply | 2025, 23(6) : 114 - 122
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Journal of Power Supply | 2025, 23(6): 114-122
• DC-AC Inverters •
Frequency Self-adaptive and Selective-order Harmonic Repetitive Control Strategy for Grid-connected Converter under Non-ideal Grid Conditions
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Licong HU  Student Member, CPSS1, Wenzhou LU  Senior Member, CPSS1, Wei WANG2, Keliang ZHOU3, Xiaoqi ZHOU1
Affiliations
  • 1.School of Internet of Things Engineering, Jiangnan University, Wuxi 214122, China
  • 2.Substation Operation-maintenance Center of Yanbian Power Supply Company, State Grid Jilin Electric Power Co., Ltd., Yanbian 133001, China
  • 3.School of Automation, Wuhan University of Technology, Wuhan 430070, China
Published: 2025-10-30 doi: 10.13234/j.issn.2095-2805.2025.6.114
Outline
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Under the non-ideal conditions of grid such as frequency fluctuation due to the access of various new energy to power system, the quality of grid-connected current of a grid-connected converter will be seriously degraded under the traditional repetitive controller with fixed parameters. Therefore, it is important to improve the frequency self-adaptability of the grid-connected converter under non-ideal grid conditions. To solve this problem, a frequency self-adaptive and selective-order harmonic repetitive controller (FSA-SHRC) is proposed, which can accurately approximate and compensate the part of parameter transformation due to fundamental frequency fluctuation by combining the internal mode with an infinite impulse response (IIR) filter. Compared with the conventional repetitive controller, the proposed FSA-SHRC has advantages of fewer memory cells required by the internal mode, a better error convergence rate and an accurate performance, and it has certain frequency adaptive performance by tuning the coefficients of IIR online when the fundamental frequency fluctuates. FSA-SHRC was applied to a three-phase grid-connected inverter control system, and the superiority of the theory and the corresponding adaptability under non-ideal grid conditions were verified.

Repetitive control  /  frequency self-adaptability  /  error convergence rate  /  infinite impulse response (IIR) filter  /  grid-connected inverter  /  pulse width modulation
胡立聪中国电源学会学生会员, 卢闻州中国电源学会高级会员, 王尉, 周克亮, 周小期. 非理想电网下并网变换器频率自适应特定次谐波重复控制策略. 电源学报, 2025 , 23 (6) : 114 -122 . DOI: 10.13234/j.issn.2095-2805.2025.6.114
Licong HU, Wenzhou LU, Wei WANG, Keliang ZHOU, Xiaoqi ZHOU. Frequency Self-adaptive and Selective-order Harmonic Repetitive Control Strategy for Grid-connected Converter under Non-ideal Grid Conditions[J]. Journal of Power Supply, 2025 , 23 (6) : 114 -122 . DOI: 10.13234/j.issn.2095-2805.2025.6.114
Funding
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  • National Natural Science Foundation of China(51407084; 61673305)
  • China Postdoctoral Science Foundation(2017M610294)
  • Jiangsu Province Postdoctoral Science Foundation(1701092B)
Appendix
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Year 2025 volume 23 Issue 6
61
5
Cite this Article
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Article Info
doi: 10.13234/j.issn.2095-2805.2025.6.114
  • Receive Date：2022-10-19
  • Online Date：2026-10-26
  • Published：2025-10-30
Article Data
Affiliations
History
  • Received：2022-10-19
  • Revised：2023-03-27
  • Accepted：2023-03-31
Funding
National Natural Science Foundation of China(51407084; 61673305)
China Postdoctoral Science Foundation(2017M610294)
Jiangsu Province Postdoctoral Science Foundation(1701092B)
Affiliations
    1.School of Internet of Things Engineering, Jiangnan University, Wuxi 214122, China
    2.Substation Operation-maintenance Center of Yanbian Power Supply Company, State Grid Jilin Electric Power Co., Ltd., Yanbian 133001, China
    3.School of Automation, Wuhan University of Technology, Wuhan 430070, China
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https://castjournals.cast.org.cn/joweb/dyxb/EN/10.13234/j.issn.2095-2805.2025.6.114
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