Research into an Online Calibration System for the Errors of Voltage Transformers Based on Open–Closed Capacitor
Periodical calibration is necessary to ensure the accuracy and reliability of voltage transformers. The traditional calibration method requires the power to be off, and the calibration period for this method is too long, meaning that problems with the transformer cannot be found in time. In this pap...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-06-01
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| Series: | Energies |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1996-1073/11/6/1455 |
| _version_ | 1798034985354002432 |
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| author | Zhenhua Li Qiuhui Li Zhengtian Wu Zhenxing Li |
| author_facet | Zhenhua Li Qiuhui Li Zhengtian Wu Zhenxing Li |
| author_sort | Zhenhua Li |
| collection | DOAJ |
| description | Periodical calibration is necessary to ensure the accuracy and reliability of voltage transformers. The traditional calibration method requires the power to be off, and the calibration period for this method is too long, meaning that problems with the transformer cannot be found in time. In this paper, a voltage transformer error online calibration system based on open–closed capacitors is proposed. Two open–closed capacitors and other auxiliary devices are utilized to construct the standard voltage sensor. The outputs of the open–closed capacitors are compared with each other to realize accurate self-checking. The average value of the output is used as the final output, which can improve the system’s accuracy and reliability. An improved algorithm based on a hybrid convolution window is proposed to extract the fundamental and harmonic signals. Test results show that the variation of the ratio error is less than 0.037%, and the variation of the angle error is less than 0.45’. |
| first_indexed | 2024-04-11T20:51:56Z |
| format | Article |
| id | doaj.art-613e7c1ae6e44683bd9b51652c02b1fc |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T20:51:56Z |
| publishDate | 2018-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-613e7c1ae6e44683bd9b51652c02b1fc2022-12-22T04:03:49ZengMDPI AGEnergies1996-10732018-06-01116145510.3390/en11061455en11061455Research into an Online Calibration System for the Errors of Voltage Transformers Based on Open–Closed CapacitorZhenhua Li0Qiuhui Li1Zhengtian Wu2Zhenxing Li3College of Electrical Engineering & New Energy, China Three Gorges University College, Yichang 443002, ChinaCollege of Electrical Engineering & New Energy, China Three Gorges University College, Yichang 443002, ChinaSchool of Electronic and Information Engineering, Suzhou University of Science and Technology, Suzhou 215009, ChinaCollege of Electrical Engineering & New Energy, China Three Gorges University College, Yichang 443002, ChinaPeriodical calibration is necessary to ensure the accuracy and reliability of voltage transformers. The traditional calibration method requires the power to be off, and the calibration period for this method is too long, meaning that problems with the transformer cannot be found in time. In this paper, a voltage transformer error online calibration system based on open–closed capacitors is proposed. Two open–closed capacitors and other auxiliary devices are utilized to construct the standard voltage sensor. The outputs of the open–closed capacitors are compared with each other to realize accurate self-checking. The average value of the output is used as the final output, which can improve the system’s accuracy and reliability. An improved algorithm based on a hybrid convolution window is proposed to extract the fundamental and harmonic signals. Test results show that the variation of the ratio error is less than 0.037%, and the variation of the angle error is less than 0.45’.http://www.mdpi.com/1996-1073/11/6/1455voltage transformererror online calibrationimproved algorithmopen–closed capacitor |
| spellingShingle | Zhenhua Li Qiuhui Li Zhengtian Wu Zhenxing Li Research into an Online Calibration System for the Errors of Voltage Transformers Based on Open–Closed Capacitor Energies voltage transformer error online calibration improved algorithm open–closed capacitor |
| title | Research into an Online Calibration System for the Errors of Voltage Transformers Based on Open–Closed Capacitor |
| title_full | Research into an Online Calibration System for the Errors of Voltage Transformers Based on Open–Closed Capacitor |
| title_fullStr | Research into an Online Calibration System for the Errors of Voltage Transformers Based on Open–Closed Capacitor |
| title_full_unstemmed | Research into an Online Calibration System for the Errors of Voltage Transformers Based on Open–Closed Capacitor |
| title_short | Research into an Online Calibration System for the Errors of Voltage Transformers Based on Open–Closed Capacitor |
| title_sort | research into an online calibration system for the errors of voltage transformers based on open closed capacitor |
| topic | voltage transformer error online calibration improved algorithm open–closed capacitor |
| url | http://www.mdpi.com/1996-1073/11/6/1455 |
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