Title :
Harmonics generated from a DC biased transformer
Author :
Lu, Shu ; Liu, Yilu ; De La Ree, Jaime
Author_Institution :
Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
fDate :
4/1/1993 12:00:00 AM
Abstract :
Harmonic characteristics of transformer excitation currents under DC bias caused by geomagnetically induced currents (GICs) are presented. A saturation model for a single phase shell-form transformer based on 3-D finite-element analysis is used to calculate the excitation currents. As a consequence, the variation of excitation current harmonics over an extended range of GIC bias is determined. The results of this study are useful in understanding transformers as harmonic sources and their impact on power systems during a solar magnetic disturbance
Keywords :
finite element analysis; geomagnetism; harmonics; magnetic storms; power transformers; 3-D finite-element analysis; DC biased transformer; excitation currents; geomagnetically induced currents; harmonics generation; power systems; saturation model; single phase shell-form transformer; solar magnetic disturbance; Circuit faults; DC generators; Magnetic circuits; Power system analysis computing; Power system harmonics; Power system modeling; Power system protection; Power system relaying; Power system simulation; Saturation magnetization;
Journal_Title :
Power Delivery, IEEE Transactions on
