Wide-band 138 kV distributed-sensor optical voltage transducer: study of accuracy under pollution and other field disturbances

TitleWide-band 138 kV distributed-sensor optical voltage transducer: study of accuracy under pollution and other field disturbances
Publication TypeConference Paper
Year of Publication2001
AuthorsRahmatian, F., P. P. Chavez, and N. A. F. Jaeger
Conference NamePower Engineering Society Summer Meeting, 2001. IEEE
Pagination156 -161 vol.1
Keywords-750 kV, 138 kV, 275 kV, 650 kV, chopped impulse tests, conductive pollution-like layers, dry nitrogen insulating gas, electric field measurement, fibre optic sensors, field disturbances, high-voltage power transmission systems, IEC HV dielectric withstand tests, lightning impulse tests, measurement accuracy, partial discharge tests, power frequency withstand, power system measurement, shielded distributed electric field sensors, transmission networks, voltage measurement, wide-band distributed-sensor optical voltage transducer
Abstract

A 138 kV optical voltage transducer (VT) using shielded distributed electric field sensors is presented for use in high-voltage (HV) electric power transmission systems. Since HV and ground are kept far apart, the VT does not require oil or SF6 for insulation; instead, it uses the environmentally friendly dry nitrogen as an insulating gas. A prototype has been tested for accuracy under various severe field disturbances including the presence of conductive pollution-like layers on the insulator and the presence of other HV sources nearby. The test results show that the VT meets IEC 0.2% and IEEE 0.3% accuracy classes under these extreme field disturbances. Data that demonstrates wide bandwidth of the VT are also presented. Another prototype has been tested and has successfully passed standard IEC HV dielectric withstand tests including power frequency withstand at 275 kV, partial discharge lt;5 pC, lightning impulse tests (BIL) at plusmn;650 kV, and chopped impulse tests at -750 kV

URLhttp://dx.doi.org/10.1109/PESS.2001.970002
DOI10.1109/PESS.2001.970002

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