Estimation of Non-Stationary Frequency and Fundamental Components for Power Electronics-Dominated Energy Systems
Estimation of fundamental frequency and sinusoidal components is required for the regulation of modern power electronics-dominated power systems. Most of the existing estimation methods are designed for signals with <italic>stationary</italic> frequency. Hence, their accuracy could signi...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2025-01-01
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| Series: | IEEE Open Journal of Power Electronics |
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| Online Access: | https://ieeexplore.ieee.org/document/11052682/ |
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| author | Peng Li Hin Sang Lam Boli Chen Raymond Wai M. Ng Thomas Parisini S. Y. Hui |
| author_facet | Peng Li Hin Sang Lam Boli Chen Raymond Wai M. Ng Thomas Parisini S. Y. Hui |
| author_sort | Peng Li |
| collection | DOAJ |
| description | Estimation of fundamental frequency and sinusoidal components is required for the regulation of modern power electronics-dominated power systems. Most of the existing estimation methods are designed for signals with <italic>stationary</italic> frequency. Hence, their accuracy could significantly degrade in the face of non-stationary frequencies, which is common in low-inertia power systems. In this paper, we propose a novel scheme for real-time estimation of a time-varying power frequency and the resulting fundamental signal. This is a time-domain method for (1) estimating <italic>non-stationary</italic> frequency and (2) fundamental signal reconstruction. It has the advantage of tracking the fundamental frequency component and treating all harmonics and subharmonics as noise. The method is based on a kernel-based estimation scheme and characterized by high accuracy, fast response, and noise immunity because of the inclusion of non-asymptotic kernel functions. The effectiveness of the proposed estimation scheme for non-stationary frequency tracking and fundamental signal reconstruction is verified by simulation and experimental results, which explore the use of the proposed scheme for frequency extraction of power signals appear in real world low-inertia systems. |
| format | Article |
| id | doaj-art-e6ffdcdb6a7c427da8c4366e7606c569 |
| institution | DOAJ |
| issn | 2644-1314 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Open Journal of Power Electronics |
| spelling | doaj-art-e6ffdcdb6a7c427da8c4366e7606c5692025-08-20T03:12:20ZengIEEEIEEE Open Journal of Power Electronics2644-13142025-01-0161202121410.1109/OJPEL.2025.358355311052682Estimation of Non-Stationary Frequency and Fundamental Components for Power Electronics-Dominated Energy SystemsPeng Li0https://orcid.org/0000-0002-8217-1326Hin Sang Lam1https://orcid.org/0000-0002-0315-9389Boli Chen2https://orcid.org/0000-0002-1553-1336Raymond Wai M. Ng3Thomas Parisini4https://orcid.org/0000-0001-5396-9665S. Y. Hui5https://orcid.org/0000-0002-5992-6559School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen, ChinaDepartment of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Kowloon, Hong KongDepartment of Electronic and Electrical Engineering, University College London, London, U.K.Department of Electrical and Electronic Engineering, The Hong Kong Polytechnic University, Hong KongDepartment of Electrical and Electronic Engineering, Imperial College London, London, U.K.Department of Electrical and Electronic Engineering, Imperial College London, London, U.K.Estimation of fundamental frequency and sinusoidal components is required for the regulation of modern power electronics-dominated power systems. Most of the existing estimation methods are designed for signals with <italic>stationary</italic> frequency. Hence, their accuracy could significantly degrade in the face of non-stationary frequencies, which is common in low-inertia power systems. In this paper, we propose a novel scheme for real-time estimation of a time-varying power frequency and the resulting fundamental signal. This is a time-domain method for (1) estimating <italic>non-stationary</italic> frequency and (2) fundamental signal reconstruction. It has the advantage of tracking the fundamental frequency component and treating all harmonics and subharmonics as noise. The method is based on a kernel-based estimation scheme and characterized by high accuracy, fast response, and noise immunity because of the inclusion of non-asymptotic kernel functions. The effectiveness of the proposed estimation scheme for non-stationary frequency tracking and fundamental signal reconstruction is verified by simulation and experimental results, which explore the use of the proposed scheme for frequency extraction of power signals appear in real world low-inertia systems.https://ieeexplore.ieee.org/document/11052682/Adaptive and nonlinear estimationfrequency detectionphase-locked looppower component extraction |
| spellingShingle | Peng Li Hin Sang Lam Boli Chen Raymond Wai M. Ng Thomas Parisini S. Y. Hui Estimation of Non-Stationary Frequency and Fundamental Components for Power Electronics-Dominated Energy Systems IEEE Open Journal of Power Electronics Adaptive and nonlinear estimation frequency detection phase-locked loop power component extraction |
| title | Estimation of Non-Stationary Frequency and Fundamental Components for Power Electronics-Dominated Energy Systems |
| title_full | Estimation of Non-Stationary Frequency and Fundamental Components for Power Electronics-Dominated Energy Systems |
| title_fullStr | Estimation of Non-Stationary Frequency and Fundamental Components for Power Electronics-Dominated Energy Systems |
| title_full_unstemmed | Estimation of Non-Stationary Frequency and Fundamental Components for Power Electronics-Dominated Energy Systems |
| title_short | Estimation of Non-Stationary Frequency and Fundamental Components for Power Electronics-Dominated Energy Systems |
| title_sort | estimation of non stationary frequency and fundamental components for power electronics dominated energy systems |
| topic | Adaptive and nonlinear estimation frequency detection phase-locked loop power component extraction |
| url | https://ieeexplore.ieee.org/document/11052682/ |
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