Maximum Correntropy with Variable Center Unscented Kalman Filter for Robust Power System State Estimation
The robust Kalman filter with correntropy loss has received much attention in recent years for forecasting-aided state estimation in power systems, since it efficiently reduces the negative influence of various abnormal situations, such as non-Gaussian communication, changing environment, and instru...
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| Format: | Article |
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MDPI AG
2022-04-01
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| Series: | Entropy |
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| Online Access: | https://www.mdpi.com/1099-4300/24/4/516 |
| _version_ | 1827628935425294336 |
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| author | Zhenglong Sun Chuanlin Liu Siyuan Peng |
| author_facet | Zhenglong Sun Chuanlin Liu Siyuan Peng |
| author_sort | Zhenglong Sun |
| collection | DOAJ |
| description | The robust Kalman filter with correntropy loss has received much attention in recent years for forecasting-aided state estimation in power systems, since it efficiently reduces the negative influence of various abnormal situations, such as non-Gaussian communication, changing environment, and instrument failures, and obviously improves the stability of power systems. However, the existing correntropy-based robust Kalman filters usually use the Gaussian function with a fixed center as the kernel function in correntropy, which may not be a suitable choice in practical applications of power system forecasting-aided state estimation (PSSE). To address this issue, a new and robust unscented Kalman filter, called the maximum correntropy with variable center unscented Kalman filter (MCVUKF), is proposed in this paper for PSSE. Specifically, MCVUKF adopts an extended version of correntropy, whose center can be located at any position, to replace the original correntropy in an unscented Kalman filter to improve the performance in PSSE. Moreover, by using an exponential function of the innovation vector to adjust a covariance matrix, an enhanced MCVUKF (En-MCVUKF) method is also developed for suppressing the influence of bad data to the innovation vector and further improving the accuracy of PSSE. Finally, extensive simulations have been conducted on IEEE 14-bus, 30-bus, and 57-bus test power systems, and the simulation results have shown the superiority of the proposed MCVUKF and En-MCVUKF methods compared with several related state-of-the-art Kalman filter methods. |
| first_indexed | 2024-03-09T13:42:40Z |
| format | Article |
| id | doaj.art-ce39c508e68c48c8998a34ddbf6ed07a |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-03-09T13:42:40Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
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| series | Entropy |
| spelling | doaj.art-ce39c508e68c48c8998a34ddbf6ed07a2023-11-30T21:05:29ZengMDPI AGEntropy1099-43002022-04-0124451610.3390/e24040516Maximum Correntropy with Variable Center Unscented Kalman Filter for Robust Power System State EstimationZhenglong Sun0Chuanlin Liu1Siyuan Peng2Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Northeast Electric Power University, Ministry of Education, Jilin 132012, ChinaKey Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Northeast Electric Power University, Ministry of Education, Jilin 132012, ChinaKey Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Northeast Electric Power University, Ministry of Education, Jilin 132012, ChinaThe robust Kalman filter with correntropy loss has received much attention in recent years for forecasting-aided state estimation in power systems, since it efficiently reduces the negative influence of various abnormal situations, such as non-Gaussian communication, changing environment, and instrument failures, and obviously improves the stability of power systems. However, the existing correntropy-based robust Kalman filters usually use the Gaussian function with a fixed center as the kernel function in correntropy, which may not be a suitable choice in practical applications of power system forecasting-aided state estimation (PSSE). To address this issue, a new and robust unscented Kalman filter, called the maximum correntropy with variable center unscented Kalman filter (MCVUKF), is proposed in this paper for PSSE. Specifically, MCVUKF adopts an extended version of correntropy, whose center can be located at any position, to replace the original correntropy in an unscented Kalman filter to improve the performance in PSSE. Moreover, by using an exponential function of the innovation vector to adjust a covariance matrix, an enhanced MCVUKF (En-MCVUKF) method is also developed for suppressing the influence of bad data to the innovation vector and further improving the accuracy of PSSE. Finally, extensive simulations have been conducted on IEEE 14-bus, 30-bus, and 57-bus test power systems, and the simulation results have shown the superiority of the proposed MCVUKF and En-MCVUKF methods compared with several related state-of-the-art Kalman filter methods.https://www.mdpi.com/1099-4300/24/4/516correntropy with variable centerunscented Kalman filterrobustnesspower system state estimation |
| spellingShingle | Zhenglong Sun Chuanlin Liu Siyuan Peng Maximum Correntropy with Variable Center Unscented Kalman Filter for Robust Power System State Estimation Entropy correntropy with variable center unscented Kalman filter robustness power system state estimation |
| title | Maximum Correntropy with Variable Center Unscented Kalman Filter for Robust Power System State Estimation |
| title_full | Maximum Correntropy with Variable Center Unscented Kalman Filter for Robust Power System State Estimation |
| title_fullStr | Maximum Correntropy with Variable Center Unscented Kalman Filter for Robust Power System State Estimation |
| title_full_unstemmed | Maximum Correntropy with Variable Center Unscented Kalman Filter for Robust Power System State Estimation |
| title_short | Maximum Correntropy with Variable Center Unscented Kalman Filter for Robust Power System State Estimation |
| title_sort | maximum correntropy with variable center unscented kalman filter for robust power system state estimation |
| topic | correntropy with variable center unscented Kalman filter robustness power system state estimation |
| url | https://www.mdpi.com/1099-4300/24/4/516 |
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