Low Power Contactless Voltage Sensor for Low Voltage Power Systems
| Autor: | Mario Luiso, Daniele Gallo, Carmine Landi, Antonio Delle Femine, Alessandro Lo Schiavo |
|---|---|
| Přispěvatelé: | Delle Femine, Antonio, Gallo, Daniele, Landi, Carmine, Lo Schiavo, Alessandro, Luiso, Mario |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
contactle
Materials science power system measurement Capacitive sensing 02 engineering and technology non-sinusoidal conditions lcsh:Chemical technology 01 natural sciences Biochemistry Article Analytical Chemistry law.invention Electric power system law sensor 0202 electrical engineering electronic engineering information engineering Power cable lcsh:TP1-1185 Electrical and Electronic Engineering Instrumentation contactless Total harmonic distortion low power business.industry 020208 electrical & electronic engineering 010401 analytical chemistry non-sinusoidal condition Electrical engineering power system measurements Atomic and Molecular Physics and Optics 0104 chemical sciences Power (physics) voltage measurement Operational amplifier business Low voltage Voltage |
| Zdroj: | Sensors, Vol 19, Iss 16, p 3513 (2019) Sensors Volume 19 Issue 16 Sensors (Basel, Switzerland) |
| ISSN: | 1424-8220 |
| Popis: | Contactless measurements represent the desirable solution in many contexts, where minimal cabling is required or, in general, cabling is not possible. This paper presents a new contactless voltage sensor for low voltage power systems. It is based on a contactless capacitive probe, which surrounds the power cable. It has two concentric electrodes insulated by a shield. A low power analog conditioning circuit evaluates the power line voltage by measuring the current in one of the capacitances of the probe. All the single stages of the circuit have been designed by using low-power rail-to-rail operational amplifiers, supplied at 3.3 V, in order to minimize the power absorption. The sensor has been characterized in various conditions, with sine waves and distorted signals, varying the frequency and the harmonic distortion. The influence of the current, flowing into the power cable, on the voltage measurement has been evaluated too. It shows a good accuracy (lower than 0.3%) from 100 V to 300 V, with a power consumption less than 5 mW. |
| Databáze: | OpenAIRE |
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