Title :
Effects of geomagnetically induced currents in the BC Hydro 500 kV system
Author :
Boteler, D.H. ; Shier, R.M. ; Watanabe, Toshio ; Horita, R.E.
Author_Institution :
Victoria Univ., Wellington, New Zealand
fDate :
1/1/1989 12:00:00 AM
Abstract :
Measurements are presented of increased harmonic currents in a 500 kV power system due to geomagnetically induced currents (GIC). The measurements were made of 60 Hz, 120 Hz, and 180 Hz currents and GIC in a 1200 MVA transformer. The recorded increases in the harmonic currents at times of GIC are consistent with computer model calculations made for a transformer operating under conditions of partial saturation. The computer model is used to determine transformer operation for GIC up to 100 A/phase, calculating magnetizing current an reactive power demand as well as the harmonic current levels. An assessment is made of the effect of these parameters on system operation
Keywords :
geomagnetic variations; harmonics; power systems; transformer substations; transmission networks; 120 Hz; 1200 MVA; 180 Hz; 500 kV; 60 Hz; British Columbia Hydro system; Canada; computer model; geomagnetically induced currents; harmonic currents; magnetizing current; partial saturation; power system; reactive power demand; transformer; Circuit faults; Current measurement; Geomagnetism; Power harmonic filters; Power measurement; Power system harmonics; Power system modeling; Reactive power; Saturation magnetization; Substations;
Journal_Title :
Power Delivery, IEEE Transactions on
