Research and Experiments on a Unipolar Capacitive Voltage Sensor
| Autor: | Wei He, Qiang Zhou, Xingzhe Hou, Songnong Li |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Computer science
Capacitive sensing Hardware_PERFORMANCEANDRELIABILITY lcsh:Chemical technology Biochemistry Signal Article Analytical Chemistry law.invention Grounding electrodes law Hardware_GENERAL Proximity sensor Voltage sensor non-contact measurement Hardware_INTEGRATEDCIRCUITS Electronic engineering Electrode array Miniaturization lcsh:TP1-1185 Electrical and Electronic Engineering Electric coupling Ansoft Maxwell Instrumentation business.industry Voltage divider Electrical engineering differential input Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Atomic and Molecular Physics and Optics voltage sensor Capacitor Magnetic core Electrode Electricity Voltage regulation business Voltage |
| Zdroj: | Sensors, Vol 15, Iss 8, Pp 20678-20697 (2015) Sensors Volume 15 Issue 8 Pages 20678-20697 Sensors (Basel, Switzerland) |
| ISSN: | 1424-8220 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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