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IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 1
Optical High-Voltage Sensor Based on Fiber Bragg
Grating and PZT Piezoelectric Ceramics
Regina Célia da Silva Barros Allil and Marcelo Martins Werneck
Abstract—Electric power facilities, such as substations, rely potential destruction of nearby equipment by pieces of sharp
on voltage transformers (VTs) for measurement and protection. ceramics and furthermore putting the substation personnel at
These pieces of equipment are bulky and heavy and tend to risk.
explode, destroying nearby equipment and posing a threat to
substation personnel. Optical voltage transducers offer many im- The o-optic effect was first reported by the English
provements on traditional inductive and capacitive VTs, such as chemist and physicist Michael Faraday in 1845. The Pockels
linear performance, wider dynamic range, lighter weight, smaller effect or Pockels electro-optic effect, which produces birefrin-
size, and improved safety. This paper relates to the development gence in an optical medium induced by an electric field, was
of a high-voltage sensor system using a PZT piezoelectric crystal studied for the first time in 1893 by the German physicist
as a transducer and a fiber Bragg grating a