Frequency Adaptive Proportional Feedforward Repetitive Control Based on Farrow Structure Filter for LCL Grid-Tied Inverters
Traditional repetitive control (TRC) can track current reference signal and suppress harmonic signals simultaneously in grid-tied inverter systems. However, the grid frequency generally varies in microgrid when there is a discrepancy between generated power and load demand, leading to a deterioratio...
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| Format: | Article |
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IEEE
2024-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/10776994/ |
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| author | Junfeng Zhang Zhaowei Sun Qiangsong Zhao Hengyi Li |
| author_facet | Junfeng Zhang Zhaowei Sun Qiangsong Zhao Hengyi Li |
| author_sort | Junfeng Zhang |
| collection | DOAJ |
| description | Traditional repetitive control (TRC) can track current reference signal and suppress harmonic signals simultaneously in grid-tied inverter systems. However, the grid frequency generally varies in microgrid when there is a discrepancy between generated power and load demand, leading to a deterioration in accurate tracking and suppression performance of the TRC. To this end, a frequency adaptive proportional feedforward repetitive control (FA-PFRC) is proposed in this paper. A feedforward channel is added to the inner model of the TRC to improve the dynamic performance of the system, and a finite impulse response (FIR) filter based on Farrow structure is used to achieve an accurate approximation of the fractional delay due to grid frequency fluctuations. The structure of the FA-PFRC is analyzed, and then the stability and harmonic reduction properties offered by the FA-PFRC are examined. Moreover, the realization method of the FA-PFRC is analyzed, and the parameter design process is given with the LCL grid-tied inverter as an example. Finally, experimental results demonstrate that the FA-PFRC maintains effective harmonic suppression and exhibit rapid dynamic response under grid frequency variation and weak grid conditions. |
| format | Article |
| id | doaj-art-25cbabb7713040f6afcc35e9251bbaae |
| institution | OA Journals |
| issn | 2169-3536 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj-art-25cbabb7713040f6afcc35e9251bbaae2025-08-20T01:57:00ZengIEEEIEEE Access2169-35362024-01-011219112019112810.1109/ACCESS.2024.351088110776994Frequency Adaptive Proportional Feedforward Repetitive Control Based on Farrow Structure Filter for LCL Grid-Tied InvertersJunfeng Zhang0https://orcid.org/0000-0002-5216-7270Zhaowei Sun1Qiangsong Zhao2Hengyi Li3https://orcid.org/0000-0003-4112-7297Henan Vocational College of Water Conservancy and Environment, Zhengzhou, Henan, ChinaHenan Huadong Industrial Control Technology Company Ltd., Zhengzhou, Henan, ChinaSchool of Automation and Electrical Engineering, Zhongyuan University of Technology, Zhengzhou, Henan, ChinaSchool of Automation and Electrical Engineering, Zhongyuan University of Technology, Zhengzhou, Henan, ChinaTraditional repetitive control (TRC) can track current reference signal and suppress harmonic signals simultaneously in grid-tied inverter systems. However, the grid frequency generally varies in microgrid when there is a discrepancy between generated power and load demand, leading to a deterioration in accurate tracking and suppression performance of the TRC. To this end, a frequency adaptive proportional feedforward repetitive control (FA-PFRC) is proposed in this paper. A feedforward channel is added to the inner model of the TRC to improve the dynamic performance of the system, and a finite impulse response (FIR) filter based on Farrow structure is used to achieve an accurate approximation of the fractional delay due to grid frequency fluctuations. The structure of the FA-PFRC is analyzed, and then the stability and harmonic reduction properties offered by the FA-PFRC are examined. Moreover, the realization method of the FA-PFRC is analyzed, and the parameter design process is given with the LCL grid-tied inverter as an example. Finally, experimental results demonstrate that the FA-PFRC maintains effective harmonic suppression and exhibit rapid dynamic response under grid frequency variation and weak grid conditions.https://ieeexplore.ieee.org/document/10776994/Grid-tied inverterrepetitive controlfrequency adaptive |
| spellingShingle | Junfeng Zhang Zhaowei Sun Qiangsong Zhao Hengyi Li Frequency Adaptive Proportional Feedforward Repetitive Control Based on Farrow Structure Filter for LCL Grid-Tied Inverters IEEE Access Grid-tied inverter repetitive control frequency adaptive |
| title | Frequency Adaptive Proportional Feedforward Repetitive Control Based on Farrow Structure Filter for LCL Grid-Tied Inverters |
| title_full | Frequency Adaptive Proportional Feedforward Repetitive Control Based on Farrow Structure Filter for LCL Grid-Tied Inverters |
| title_fullStr | Frequency Adaptive Proportional Feedforward Repetitive Control Based on Farrow Structure Filter for LCL Grid-Tied Inverters |
| title_full_unstemmed | Frequency Adaptive Proportional Feedforward Repetitive Control Based on Farrow Structure Filter for LCL Grid-Tied Inverters |
| title_short | Frequency Adaptive Proportional Feedforward Repetitive Control Based on Farrow Structure Filter for LCL Grid-Tied Inverters |
| title_sort | frequency adaptive proportional feedforward repetitive control based on farrow structure filter for lcl grid tied inverters |
| topic | Grid-tied inverter repetitive control frequency adaptive |
| url | https://ieeexplore.ieee.org/document/10776994/ |
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