Abstract
The principle, temperature characteristics, and
frequency characteristics of fiber-<>ptic voltage sensors and magnetic
field sensors are reported, along with the results of an aging test on
these sensors. The fiber-<>ptic voltage sensor utilizes the "Pockels"
effect of Bi12 Si020 single crystal and the fiber-<>ptic magnetic-field
sensor utilizes the "Faraday" effect of ZnSe polycrystal and Bi 12 Si020
single crystal. The basic performance of these sensors has been investigated
from the perspective of their use as parts in electrical.apparntuses.
In addition, in this paper some practical applications in electrical substations
and transmission lines are presented. These include a fault
section detecting system for gas insulated transmission line (GIL), an
optical voltage transformer and optical current transformer which are
embedded in gas insulated switchgear (GIS), and a surge voltage receiving
system.
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