Research and Experiments on a Unipolar Capacitive Voltage Sensor
Voltage sensors are an important part of the electric system. In service, traditional voltage sensors need to directly contact a high-voltage charged body. Sensors involve a large volume, complex insulation structures, and high design costs. Typically an iron core structure is adopted. As a result,...
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| Format: | Article |
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MDPI AG
2015-08-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/15/8/20678 |
| _version_ | 1798005496709382144 |
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| author | Qiang Zhou Wei He Songnong Li Xingzhe Hou |
| author_facet | Qiang Zhou Wei He Songnong Li Xingzhe Hou |
| author_sort | Qiang Zhou |
| collection | DOAJ |
| description | Voltage sensors are an important part of the electric system. In service, traditional voltage sensors need to directly contact a high-voltage charged body. Sensors involve a large volume, complex insulation structures, and high design costs. Typically an iron core structure is adopted. As a result, ferromagnetic resonance can occur easily during practical application. Moreover, owing to the multilevel capacitor divider, the sensor cannot reflect the changes of measured voltage in time. Based on the electric field coupling principle, this paper designs a new voltage sensor; the unipolar structure design solves many problems of traditional voltage sensors like the great insulation design difficulty and high costs caused by grounding electrodes. A differential signal input structure is adopted for the detection circuit, which effectively restrains the influence of the common-mode interference signal. Through sensor modeling, simulation and calculations, the structural design of the sensor electrode was optimized, miniaturization of the sensor was realized, the voltage division ratio of the sensor was enhanced, and the phase difference of sensor measurement was weakened. The voltage sensor is applied to a single-phase voltage class line of 10 kV for testing. According to the test results, the designed sensor is able to meet the requirements of accurate and real-time measurement for voltage of the charged conductor as well as to provide a new method for electricity larceny prevention and on-line monitoring of the power grid in an electric system. Therefore, it can satisfy the development demands of the smart power grid. |
| first_indexed | 2024-04-11T12:41:18Z |
| format | Article |
| id | doaj.art-bf0e386df8f340c19b5d519e97b7dc4e |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T12:41:18Z |
| publishDate | 2015-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-bf0e386df8f340c19b5d519e97b7dc4e2022-12-22T04:23:30ZengMDPI AGSensors1424-82202015-08-01158206782069710.3390/s150820678s150820678Research and Experiments on a Unipolar Capacitive Voltage SensorQiang Zhou0Wei He1Songnong Li2Xingzhe Hou3State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, ChinaState Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, ChinaState Grid Chongqing Electric Power Co. Electric Power Research Institute, Chongqing 400015, ChinaState Grid Chongqing Electric Power Co. Electric Power Research Institute, Chongqing 400015, ChinaVoltage sensors are an important part of the electric system. In service, traditional voltage sensors need to directly contact a high-voltage charged body. Sensors involve a large volume, complex insulation structures, and high design costs. Typically an iron core structure is adopted. As a result, ferromagnetic resonance can occur easily during practical application. Moreover, owing to the multilevel capacitor divider, the sensor cannot reflect the changes of measured voltage in time. Based on the electric field coupling principle, this paper designs a new voltage sensor; the unipolar structure design solves many problems of traditional voltage sensors like the great insulation design difficulty and high costs caused by grounding electrodes. A differential signal input structure is adopted for the detection circuit, which effectively restrains the influence of the common-mode interference signal. Through sensor modeling, simulation and calculations, the structural design of the sensor electrode was optimized, miniaturization of the sensor was realized, the voltage division ratio of the sensor was enhanced, and the phase difference of sensor measurement was weakened. The voltage sensor is applied to a single-phase voltage class line of 10 kV for testing. According to the test results, the designed sensor is able to meet the requirements of accurate and real-time measurement for voltage of the charged conductor as well as to provide a new method for electricity larceny prevention and on-line monitoring of the power grid in an electric system. Therefore, it can satisfy the development demands of the smart power grid.http://www.mdpi.com/1424-8220/15/8/20678voltage sensordifferential inputnon-contact measurementAnsoft Maxwell |
| spellingShingle | Qiang Zhou Wei He Songnong Li Xingzhe Hou Research and Experiments on a Unipolar Capacitive Voltage Sensor Sensors voltage sensor differential input non-contact measurement Ansoft Maxwell |
| title | Research and Experiments on a Unipolar Capacitive Voltage Sensor |
| title_full | Research and Experiments on a Unipolar Capacitive Voltage Sensor |
| title_fullStr | Research and Experiments on a Unipolar Capacitive Voltage Sensor |
| title_full_unstemmed | Research and Experiments on a Unipolar Capacitive Voltage Sensor |
| title_short | Research and Experiments on a Unipolar Capacitive Voltage Sensor |
| title_sort | research and experiments on a unipolar capacitive voltage sensor |
| topic | voltage sensor differential input non-contact measurement Ansoft Maxwell |
| url | http://www.mdpi.com/1424-8220/15/8/20678 |
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