Title :
Influence of ground conductivity on the over voltages induced on overhead power distribution lines due to an indirect lightning stroke
Author :
Kannu, P. Durai ; Thomas, Julian
Author_Institution :
Dept. of High Voltage Eng., Indian Inst. of Sci., Bangalore, India
Abstract :
Computation of induced voltage on an overhead line due to an indirect lightning stroke involves calculation of electric field due to the lightning stroke as well as its coupling with the overhead line. The ground conductivity influences both the electric field as well as the coupling mechanism and hence the magnitude and waveshape of the induced voltage. In this paper, lightning induced voltages are calculated for 33 kV, 3φ single circuit and double circuit overhead power distribution lines. It has been observed that the magnitude and wave shape of the induced voltage is influenced by the finite ground conductivity as well as the number of overhead conductors in a multiconductor system
Keywords :
electric fields; electrical conductivity; electromagnetic coupling; electromagnetic induction; lightning; overvoltage; power distribution lines; power overhead lines; 3-phase double circuit; 3-phase single circuit; 33 kV; EM coupling; electric field; ground conductivity; indirect lightning stroke; induced over voltages; induced voltage magnitude; induced voltage waveshape; lightning induced voltages; lightning stroke; multiconductor system; overhead power distribution lines; Conductivity; Conductors; Coupling circuits; Impedance; Integral equations; Lightning; Optical coupling; Power distribution lines; Power system modeling; Voltage control;
Conference_Titel :
Electromagnetic Compatibility, 2000. IEEE International Symposium on
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-5677-2
DOI :
10.1109/ISEMC.2000.874751
