A fast three-phase synchronization technique with parallel structure
For many grid-connected equipment, the phase and frequency of grid voltage are crucial synchronization information. A phase-locked loop (PLL) is usually employed to obtain the information. In distorted grid, adding additional filter is a convenient and effective approach to enhance the harmonic reje...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-12-01
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| Series: | Energy Reports |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S235248472031492X |
| _version_ | 1818924468753399808 |
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| author | Jinbo Li Qin Wang Yinfeng Hu Zhifeng Sun Lan Xiao Yupei Wang |
| author_facet | Jinbo Li Qin Wang Yinfeng Hu Zhifeng Sun Lan Xiao Yupei Wang |
| author_sort | Jinbo Li |
| collection | DOAJ |
| description | For many grid-connected equipment, the phase and frequency of grid voltage are crucial synchronization information. A phase-locked loop (PLL) is usually employed to obtain the information. In distorted grid, adding additional filter is a convenient and effective approach to enhance the harmonic rejection capability of the PLL. Most filters cannot simultaneously block the inter-harmonics, sub-harmonics and other order harmonics. Adaptive notch filter (ANF) can accomplish such task, since multiple ANFs can be flexibly cascaded. Generally, ANFs works as an in-loop filter in a PLL. When the notch frequency of an ANF is very low or multiple ANFs are cascaded in the control loop, the slowing down of the PLL response speed may be unacceptable in some applications. To deal with this problem, this paper proposes a parallel structure for the ANF-PLL to improve the response speed. In the proposed structure, a group of ANFs are placed in a front-stage synchronous reference frame and work as a prefilter, and a conventional ANF-PLL is used as a parallel frequency feedback loop (FFL). The effectiveness of this technique is verified through experimental results. |
| first_indexed | 2024-12-20T02:25:49Z |
| format | Article |
| id | doaj.art-7f50a95cfaca4be6b681408076ea90e8 |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-12-20T02:25:49Z |
| publishDate | 2020-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Reports |
| spelling | doaj.art-7f50a95cfaca4be6b681408076ea90e82022-12-21T19:56:43ZengElsevierEnergy Reports2352-48472020-12-01611141122A fast three-phase synchronization technique with parallel structureJinbo Li0Qin Wang1Yinfeng Hu2Zhifeng Sun3Lan Xiao4Yupei Wang5Corresponding author.; College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210000, ChinaCollege of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210000, ChinaCollege of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210000, ChinaCollege of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210000, ChinaCollege of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210000, ChinaCollege of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210000, ChinaFor many grid-connected equipment, the phase and frequency of grid voltage are crucial synchronization information. A phase-locked loop (PLL) is usually employed to obtain the information. In distorted grid, adding additional filter is a convenient and effective approach to enhance the harmonic rejection capability of the PLL. Most filters cannot simultaneously block the inter-harmonics, sub-harmonics and other order harmonics. Adaptive notch filter (ANF) can accomplish such task, since multiple ANFs can be flexibly cascaded. Generally, ANFs works as an in-loop filter in a PLL. When the notch frequency of an ANF is very low or multiple ANFs are cascaded in the control loop, the slowing down of the PLL response speed may be unacceptable in some applications. To deal with this problem, this paper proposes a parallel structure for the ANF-PLL to improve the response speed. In the proposed structure, a group of ANFs are placed in a front-stage synchronous reference frame and work as a prefilter, and a conventional ANF-PLL is used as a parallel frequency feedback loop (FFL). The effectiveness of this technique is verified through experimental results.http://www.sciencedirect.com/science/article/pii/S235248472031492XAdaptive notch filter (ANF)Phase-locked loop (PLL)PrefilterLinearized modelHarmonic voltage |
| spellingShingle | Jinbo Li Qin Wang Yinfeng Hu Zhifeng Sun Lan Xiao Yupei Wang A fast three-phase synchronization technique with parallel structure Energy Reports Adaptive notch filter (ANF) Phase-locked loop (PLL) Prefilter Linearized model Harmonic voltage |
| title | A fast three-phase synchronization technique with parallel structure |
| title_full | A fast three-phase synchronization technique with parallel structure |
| title_fullStr | A fast three-phase synchronization technique with parallel structure |
| title_full_unstemmed | A fast three-phase synchronization technique with parallel structure |
| title_short | A fast three-phase synchronization technique with parallel structure |
| title_sort | fast three phase synchronization technique with parallel structure |
| topic | Adaptive notch filter (ANF) Phase-locked loop (PLL) Prefilter Linearized model Harmonic voltage |
| url | http://www.sciencedirect.com/science/article/pii/S235248472031492X |
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