Title :
Transmission line models for coordination of surge-protective devices
Author :
Standler, Ronald B.
Author_Institution :
HVTRL, Inc., Lexington, KY, USA
Abstract :
The distribution of surge currents between an arrester and suppressor that are separated by a transmission line is described. Six different models of transmission lines are used in the calculations: (1) a single inductor, (2) a single resistor, (3) an ideal transmission line, (4) a cascade of lumped RLC elements where the R value accounts only for the DC resistance of the line, (5) a model with transmission line equations for a continuous line including only the DC resistance, and (6) a model with transmission line equations for a continuous line including both the DC resistance and the skin effect resistance. Two different surge waveforms are used in the simulation: the 1.2/50-μs wave and the 10/350-μs wave that simulates the current in a direct lightning stroke. The current waveshape and total energy deposited in the suppressor varistor are reported. Conclusions are made about the relative accuracy of the various models of transmission lines in this application
Keywords :
current distribution; lightning; surge protection; transmission line theory; DC resistance; arrester; continuous line; current waveshape; direct lightning stroke; inductor; lumped RLC elements; resistor; simulation; skin effect resistance; suppressor; suppressor varistor; surge currents distribution; surge waveforms; surge-protective devices; transmission line equations; transmission lines; Arresters; Circuit simulation; Computational modeling; Distributed parameter circuits; Inductors; Power transmission lines; RLC circuits; Skin effect; Surge protection; Transmission lines;
Conference_Titel :
Electromagnetic Compatibility, 1993. Symposium Record., 1993 IEEE International Symposium on
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-1304-6
DOI :
10.1109/ISEMC.1993.473711
