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...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-08-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/16/7161 |
| _version_ | 1797583277898334208 |
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| author | Rujin Huang Wenbin Zhang Junyu Zhu Xiangqi Zou Hetao Wu Chunguang Suo |
| author_facet | Rujin Huang Wenbin Zhang Junyu Zhu Xiangqi Zou Hetao Wu Chunguang Suo |
| author_sort | Rujin Huang |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T23:35:37Z |
| format | Article |
| id | doaj.art-65496032ae204de7bfd253aa22124a47 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T23:35:37Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-65496032ae204de7bfd253aa22124a472023-11-19T02:57:41ZengMDPI AGSensors1424-82202023-08-012316716110.3390/s23167161Transmission Line Voltage Measurement Utilizing a Calibrated Suspension Grounding Voltage SensorRujin Huang0Wenbin Zhang1Junyu Zhu2Xiangqi Zou3Hetao Wu4Chunguang Suo5College of Science, Kunming University of Science and Technology, Kunming 650504, ChinaCollege of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650504, ChinaCollege of Science, Kunming University of Science and Technology, Kunming 650504, ChinaCollege of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650504, ChinaCollege of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650504, ChinaCollege of Science, Kunming University of Science and Technology, Kunming 650504, ChinaThe 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.https://www.mdpi.com/1424-8220/23/16/7161voltage measurementsuspension groundingself-calibrationinternal capacitance transformation |
| spellingShingle | Rujin Huang Wenbin Zhang Junyu Zhu Xiangqi Zou Hetao Wu Chunguang Suo Transmission Line Voltage Measurement Utilizing a Calibrated Suspension Grounding Voltage Sensor Sensors voltage measurement suspension grounding self-calibration internal capacitance transformation |
| 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 | voltage measurement suspension grounding self-calibration internal capacitance transformation |
| url | https://www.mdpi.com/1424-8220/23/16/7161 |
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