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Transmission Line Voltage Measurement Utilizing a Calibrated Suspension Grounding Voltage Sensor
The accurate voltage measurement of distribution networks is of great significance in power dispatching and fault diagnosis. Voltage sensors based on the spatial electric field effect do not require grounding, which provides the possibility for the distributed measurement of transmission line voltag...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10458635/ https://www.ncbi.nlm.nih.gov/pubmed/37631698 http://dx.doi.org/10.3390/s23167161 |
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author | Huang, Rujin Zhang, Wenbin Zhu, Junyu Zou, Xiangqi Wu, Hetao Suo, Chunguang |
author_facet | Huang, Rujin Zhang, Wenbin Zhu, Junyu Zou, Xiangqi Wu, Hetao Suo, Chunguang |
author_sort | Huang, Rujin |
collection | PubMed |
description | The accurate voltage measurement of distribution networks is of great significance in power dispatching and fault diagnosis. Voltage sensors based on the spatial electric field effect do not require grounding, which provides the possibility for the distributed measurement of transmission line voltages. However, the divider ratio of suspension grounding voltage sensors is affected by the height between the sensor and the ground, as well as the distance between the sensor and the telegraph pole. In this paper, a self-calibration method based on internal capacitance transformation is proposed to realize the on-line calibration of suspension grounding voltage sensors. The calibration is accomplished by switching different parameters in the conditioning circuit, and the calibration process does not require power failure or known input excitation. In addition, the impact of electric fields in the other two phases of three-phase transmission lines on measurement through simulation research is quantified in this paper. In order to reduce the impact of interference electric fields, an equipotential shielding structure is designed. The circuit topology and probe prototype have been developed and testing has been conducted in laboratory conditions; the experimental results show that the maximum relative error of voltage amplitude is 1.65%, and the phase relative error is 0.94%. The measurement accuracy is not limited by the height to ground or the distance to the telegraph pole. In addition, in the application of an equipotential shielding probe, the maximum deviation of measured voltage is 0.7% with and without interference electric fields. |
format | Online Article Text |
id | pubmed-10458635 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-104586352023-08-27 Transmission Line Voltage Measurement Utilizing a Calibrated Suspension Grounding Voltage Sensor Huang, Rujin Zhang, Wenbin Zhu, Junyu Zou, Xiangqi Wu, Hetao Suo, Chunguang Sensors (Basel) Article The accurate voltage measurement of distribution networks is of great significance in power dispatching and fault diagnosis. Voltage sensors based on the spatial electric field effect do not require grounding, which provides the possibility for the distributed measurement of transmission line voltages. However, the divider ratio of suspension grounding voltage sensors is affected by the height between the sensor and the ground, as well as the distance between the sensor and the telegraph pole. In this paper, a self-calibration method based on internal capacitance transformation is proposed to realize the on-line calibration of suspension grounding voltage sensors. The calibration is accomplished by switching different parameters in the conditioning circuit, and the calibration process does not require power failure or known input excitation. In addition, the impact of electric fields in the other two phases of three-phase transmission lines on measurement through simulation research is quantified in this paper. In order to reduce the impact of interference electric fields, an equipotential shielding structure is designed. The circuit topology and probe prototype have been developed and testing has been conducted in laboratory conditions; the experimental results show that the maximum relative error of voltage amplitude is 1.65%, and the phase relative error is 0.94%. The measurement accuracy is not limited by the height to ground or the distance to the telegraph pole. In addition, in the application of an equipotential shielding probe, the maximum deviation of measured voltage is 0.7% with and without interference electric fields. MDPI 2023-08-14 /pmc/articles/PMC10458635/ /pubmed/37631698 http://dx.doi.org/10.3390/s23167161 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Huang, Rujin Zhang, Wenbin Zhu, Junyu Zou, Xiangqi Wu, Hetao Suo, Chunguang Transmission Line Voltage Measurement Utilizing a Calibrated Suspension Grounding Voltage Sensor |
title | Transmission Line Voltage Measurement Utilizing a Calibrated Suspension Grounding Voltage Sensor |
title_full | Transmission Line Voltage Measurement Utilizing a Calibrated Suspension Grounding Voltage Sensor |
title_fullStr | Transmission Line Voltage Measurement Utilizing a Calibrated Suspension Grounding Voltage Sensor |
title_full_unstemmed | Transmission Line Voltage Measurement Utilizing a Calibrated Suspension Grounding Voltage Sensor |
title_short | Transmission Line Voltage Measurement Utilizing a Calibrated Suspension Grounding Voltage Sensor |
title_sort | transmission line voltage measurement utilizing a calibrated suspension grounding voltage sensor |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10458635/ https://www.ncbi.nlm.nih.gov/pubmed/37631698 http://dx.doi.org/10.3390/s23167161 |
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