Parameter estimation of power system wideband oscillation based on Zoom FFT and relaxation algorithm
The widespread use of power electronic devices has resulted in frequent wideband oscillation events, making accurate and rapid parameter estimation critical. However, existing methods face significant challenges in balancing resolution and identification speed, especially for signals with broad freq...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2025-09-01
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| Series: | International Journal of Electrical Power & Energy Systems |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142061525004491 |
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| _version_ | 1849236018989891584 |
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| author | Shuang Feng Yue Mei Zhirui Zhang Jiaxing Lei Yi Tang |
| author_facet | Shuang Feng Yue Mei Zhirui Zhang Jiaxing Lei Yi Tang |
| author_sort | Shuang Feng |
| collection | DOAJ |
| description | The widespread use of power electronic devices has resulted in frequent wideband oscillation events, making accurate and rapid parameter estimation critical. However, existing methods face significant challenges in balancing resolution and identification speed, especially for signals with broad frequency ranges, pronounced time-varying characteristics, and noise interference. To address these issues, this paper proposes a wideband oscillation parameter estimation method based on Zoom Fast Fourier Transform (ZFFT) and relaxation algorithm. The proposed method estimates multi-mode wideband oscillation signals by minimizing a non-linear least squares (NLS) cost function. It transforms the multi-component NLS parameter estimation problem into a series of single-component NLS parameter cyclic estimation problems. This simplification improves operational efficiency and demonstrates strong convergence and noise resistance. Additionally, to address the low accuracy in estimating wideband oscillation frequencies within a short time window, which negatively impacts the estimation accuracy of other parameters and the efficiency of algorithm iterations, the paper uses ZFFT for preliminary frequency estimation. This approach significantly improves the overall speed and accuracy of the algorithm. Results from numerical signals and measured signals from oscillation events confirm that this method effectively estimates parameters of wideband oscillation signals with high resolution, even within a short time window and in the presence of noise and multiple oscillation modes. |
| format | Article |
| id | doaj-art-9a914456ae164a84aa10eba0b8fda1a1 |
| institution | Kabale University |
| issn | 0142-0615 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Electrical Power & Energy Systems |
| spelling | doaj-art-9a914456ae164a84aa10eba0b8fda1a12025-08-20T04:02:31ZengElsevierInternational Journal of Electrical Power & Energy Systems0142-06152025-09-0117011090110.1016/j.ijepes.2025.110901Parameter estimation of power system wideband oscillation based on Zoom FFT and relaxation algorithmShuang Feng0Yue Mei1Zhirui Zhang2Jiaxing Lei3Yi Tang4Corresponding author.; School of Electrical Engineering, Southeast University, Nanjing, ChinaSchool of Electrical Engineering, Southeast University, Nanjing, ChinaSchool of Electrical Engineering, Southeast University, Nanjing, ChinaSchool of Electrical Engineering, Southeast University, Nanjing, ChinaSchool of Electrical Engineering, Southeast University, Nanjing, ChinaThe widespread use of power electronic devices has resulted in frequent wideband oscillation events, making accurate and rapid parameter estimation critical. However, existing methods face significant challenges in balancing resolution and identification speed, especially for signals with broad frequency ranges, pronounced time-varying characteristics, and noise interference. To address these issues, this paper proposes a wideband oscillation parameter estimation method based on Zoom Fast Fourier Transform (ZFFT) and relaxation algorithm. The proposed method estimates multi-mode wideband oscillation signals by minimizing a non-linear least squares (NLS) cost function. It transforms the multi-component NLS parameter estimation problem into a series of single-component NLS parameter cyclic estimation problems. This simplification improves operational efficiency and demonstrates strong convergence and noise resistance. Additionally, to address the low accuracy in estimating wideband oscillation frequencies within a short time window, which negatively impacts the estimation accuracy of other parameters and the efficiency of algorithm iterations, the paper uses ZFFT for preliminary frequency estimation. This approach significantly improves the overall speed and accuracy of the algorithm. Results from numerical signals and measured signals from oscillation events confirm that this method effectively estimates parameters of wideband oscillation signals with high resolution, even within a short time window and in the presence of noise and multiple oscillation modes.http://www.sciencedirect.com/science/article/pii/S0142061525004491Wideband oscillationEstimationZoomRelaxation |
| spellingShingle | Shuang Feng Yue Mei Zhirui Zhang Jiaxing Lei Yi Tang Parameter estimation of power system wideband oscillation based on Zoom FFT and relaxation algorithm International Journal of Electrical Power & Energy Systems Wideband oscillation Estimation Zoom Relaxation |
| title | Parameter estimation of power system wideband oscillation based on Zoom FFT and relaxation algorithm |
| title_full | Parameter estimation of power system wideband oscillation based on Zoom FFT and relaxation algorithm |
| title_fullStr | Parameter estimation of power system wideband oscillation based on Zoom FFT and relaxation algorithm |
| title_full_unstemmed | Parameter estimation of power system wideband oscillation based on Zoom FFT and relaxation algorithm |
| title_short | Parameter estimation of power system wideband oscillation based on Zoom FFT and relaxation algorithm |
| title_sort | parameter estimation of power system wideband oscillation based on zoom fft and relaxation algorithm |
| topic | Wideband oscillation Estimation Zoom Relaxation |
| url | http://www.sciencedirect.com/science/article/pii/S0142061525004491 |
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