An αβ-Frame Moving Average Filter to Improve the Dynamic Performance of Phase-Locked Loop
The moving average filter (MAF) is one of the most widely used methods to block harmonics in a phase-locked loop (PLL). This paper proposes a simple structure for MAF to work directly in the αβ-frame (called αβMAF). Compared with the standard dq-frame MAF...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2020-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9210511/ |
| _version_ | 1818874202436927488 |
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| author | Jinbo Li Qin Wang Lan Xiao Yinfeng Hu Qunfang Wu Zehao Liu |
| author_facet | Jinbo Li Qin Wang Lan Xiao Yinfeng Hu Qunfang Wu Zehao Liu |
| author_sort | Jinbo Li |
| collection | DOAJ |
| description | The moving average filter (MAF) is one of the most widely used methods to block harmonics in a phase-locked loop (PLL). This paper proposes a simple structure for MAF to work directly in the αβ-frame (called αβMAF). Compared with the standard dq-frame MAF (dqMAF) used as an in-loop filter, αβMAF acts as a prefilter and significantly improves the PLL dynamic response. Its derivation process and implementation is described in detail in both continuous and discrete time domains. In an adaptive prefilter-based PLL, a frequency feedback loop (FFL) is indispensable, but it is not easy to design. Therefore, nonadaptive αβMAF is suggested, and a corrector is added to eliminate the phase error at off-nominal frequencies. In this paper, the small signal model of the proposed PLL is carried out through the perspective of frequency shift, which simplifies the derivation process. The effectiveness of the proposed technique is confirmed through simulation and experimental results. |
| first_indexed | 2024-12-19T13:06:51Z |
| format | Article |
| id | doaj.art-e9da1d6bcde848cf962ee37a8f3f6a26 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-19T13:06:51Z |
| publishDate | 2020-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-e9da1d6bcde848cf962ee37a8f3f6a262022-12-21T20:20:01ZengIEEEIEEE Access2169-35362020-01-01818066118067110.1109/ACCESS.2020.30282379210511An αβ-Frame Moving Average Filter to Improve the Dynamic Performance of Phase-Locked LoopJinbo Li0https://orcid.org/0000-0002-6559-8213Qin Wang1Lan Xiao2https://orcid.org/0000-0002-5823-7241Yinfeng Hu3Qunfang Wu4https://orcid.org/0000-0002-6437-404XZehao Liu5College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, ChinaCollege of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, ChinaCollege of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, ChinaCollege of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, ChinaCollege of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, ChinaCollege of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, ChinaThe moving average filter (MAF) is one of the most widely used methods to block harmonics in a phase-locked loop (PLL). This paper proposes a simple structure for MAF to work directly in the αβ-frame (called αβMAF). Compared with the standard dq-frame MAF (dqMAF) used as an in-loop filter, αβMAF acts as a prefilter and significantly improves the PLL dynamic response. Its derivation process and implementation is described in detail in both continuous and discrete time domains. In an adaptive prefilter-based PLL, a frequency feedback loop (FFL) is indispensable, but it is not easy to design. Therefore, nonadaptive αβMAF is suggested, and a corrector is added to eliminate the phase error at off-nominal frequencies. In this paper, the small signal model of the proposed PLL is carried out through the perspective of frequency shift, which simplifies the derivation process. The effectiveness of the proposed technique is confirmed through simulation and experimental results.https://ieeexplore.ieee.org/document/9210511/Moving average filter (MAF)phase locked loop (PLL)prefiltergrid synchronization |
| spellingShingle | Jinbo Li Qin Wang Lan Xiao Yinfeng Hu Qunfang Wu Zehao Liu An αβ-Frame Moving Average Filter to Improve the Dynamic Performance of Phase-Locked Loop IEEE Access Moving average filter (MAF) phase locked loop (PLL) prefilter grid synchronization |
| title | An αβ-Frame Moving Average Filter to Improve the Dynamic Performance of Phase-Locked Loop |
| title_full | An αβ-Frame Moving Average Filter to Improve the Dynamic Performance of Phase-Locked Loop |
| title_fullStr | An αβ-Frame Moving Average Filter to Improve the Dynamic Performance of Phase-Locked Loop |
| title_full_unstemmed | An αβ-Frame Moving Average Filter to Improve the Dynamic Performance of Phase-Locked Loop |
| title_short | An αβ-Frame Moving Average Filter to Improve the Dynamic Performance of Phase-Locked Loop |
| title_sort | x03b1 x03b2 frame moving average filter to improve the dynamic performance of phase locked loop |
| topic | Moving average filter (MAF) phase locked loop (PLL) prefilter grid synchronization |
| url | https://ieeexplore.ieee.org/document/9210511/ |
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