Rapid Extraction of the Fundamental Components for Non-Ideal Three-Phase Grid Based on an Improved Sliding Discrete Fourier Transform
In order to make an effective extraction of the fundamental components for a non-ideal three-phase grid, an improved sliding discrete Fourier transform (ISDFT) has been proposed in this paper. Firstly, the non-ideal signal characteristics are studied in detail, which reveals that there are not only...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-06-01
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| Series: | Electronics |
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| Online Access: | https://www.mdpi.com/2079-9292/11/12/1915 |
| _version_ | 1797487984456499200 |
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| author | Kai Li Wei Nai |
| author_facet | Kai Li Wei Nai |
| author_sort | Kai Li |
| collection | DOAJ |
| description | In order to make an effective extraction of the fundamental components for a non-ideal three-phase grid, an improved sliding discrete Fourier transform (ISDFT) has been proposed in this paper. Firstly, the non-ideal signal characteristics are studied in detail, which reveals that there are not only typical harmonic components, but also double frequency components, that exist in dq coordinates when the three-phase grid voltages are unbalanced. Then, the structure form of the conventional sliding discrete Fourier transform (SDFT) has been redesigned to form the ISDFT algorithm, in which a special offset link is introduced to reduce the extraction time while the effectiveness is guaranteed. The experimental results show that this proposed ISDFT is suitable for types of non-ideal signals extraction and can keep a nice dynamical and steady performance in cases of grid or load disturbance. For the average extraction time, ISDFT is saving about 44.56% more of the time than SDFT and about 65.32% more than discrete Fourier transform (DFT). |
| first_indexed | 2024-03-09T23:55:38Z |
| format | Article |
| id | doaj.art-912a600a5f2a4ef0a1315f2aec57c3f9 |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-09T23:55:38Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-912a600a5f2a4ef0a1315f2aec57c3f92023-11-23T16:25:51ZengMDPI AGElectronics2079-92922022-06-011112191510.3390/electronics11121915Rapid Extraction of the Fundamental Components for Non-Ideal Three-Phase Grid Based on an Improved Sliding Discrete Fourier TransformKai Li0Wei Nai1Department of Electronic and Information Engineering, Tongji Zhejiang College, Jiaxing 314051, ChinaDepartment of Electronic and Information Engineering, Tongji Zhejiang College, Jiaxing 314051, ChinaIn order to make an effective extraction of the fundamental components for a non-ideal three-phase grid, an improved sliding discrete Fourier transform (ISDFT) has been proposed in this paper. Firstly, the non-ideal signal characteristics are studied in detail, which reveals that there are not only typical harmonic components, but also double frequency components, that exist in dq coordinates when the three-phase grid voltages are unbalanced. Then, the structure form of the conventional sliding discrete Fourier transform (SDFT) has been redesigned to form the ISDFT algorithm, in which a special offset link is introduced to reduce the extraction time while the effectiveness is guaranteed. The experimental results show that this proposed ISDFT is suitable for types of non-ideal signals extraction and can keep a nice dynamical and steady performance in cases of grid or load disturbance. For the average extraction time, ISDFT is saving about 44.56% more of the time than SDFT and about 65.32% more than discrete Fourier transform (DFT).https://www.mdpi.com/2079-9292/11/12/1915non-ideal three-phase gridimproved sliding discrete Fourier transfer (ISDFT)harmonic componentsdouble frequency components |
| spellingShingle | Kai Li Wei Nai Rapid Extraction of the Fundamental Components for Non-Ideal Three-Phase Grid Based on an Improved Sliding Discrete Fourier Transform Electronics non-ideal three-phase grid improved sliding discrete Fourier transfer (ISDFT) harmonic components double frequency components |
| title | Rapid Extraction of the Fundamental Components for Non-Ideal Three-Phase Grid Based on an Improved Sliding Discrete Fourier Transform |
| title_full | Rapid Extraction of the Fundamental Components for Non-Ideal Three-Phase Grid Based on an Improved Sliding Discrete Fourier Transform |
| title_fullStr | Rapid Extraction of the Fundamental Components for Non-Ideal Three-Phase Grid Based on an Improved Sliding Discrete Fourier Transform |
| title_full_unstemmed | Rapid Extraction of the Fundamental Components for Non-Ideal Three-Phase Grid Based on an Improved Sliding Discrete Fourier Transform |
| title_short | Rapid Extraction of the Fundamental Components for Non-Ideal Three-Phase Grid Based on an Improved Sliding Discrete Fourier Transform |
| title_sort | rapid extraction of the fundamental components for non ideal three phase grid based on an improved sliding discrete fourier transform |
| topic | non-ideal three-phase grid improved sliding discrete Fourier transfer (ISDFT) harmonic components double frequency components |
| url | https://www.mdpi.com/2079-9292/11/12/1915 |
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