Title :
Optically powered hybrid current measurement system
Author :
Holmes, Reid ; Jones, G.R.
fDate :
6/10/1993 12:00:00 AM
Abstract :
An optically coupled and optically powered hybrid current measurement system for use in high voltage power systems is described. The transmitter, which uses pulse frequency modulation, is designed for minimum power operation of 2.5 mW. The signal to noise ratio is 54 dB corresponding to a resolution of 1 A. System accuracy is determined by the temperature sensitivity of the transmitter which is approximately 400 p.p.m. degrees C-1.
Keywords :
electric current measurement; electric sensing devices; high-voltage techniques; optical fibres; optical receivers; power system measurement; pulse frequency modulation; transmitters; 2.5 mW; 54 dB; HV system application; PFM; SNR; high voltage power systems; hybrid current measurement system; line current; minimum power operation; optically coupled; optically powered; pulse frequency modulation; transmitter;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19930700
