TY  - JOUR
T1  - Impact of Transient Over-Voltages  on the Skirting of Electrical Transmission Line Insulators Corona Effects
AU - , E.B. Azzag AU - , M. Houabes AU - , H. Labar AU - , H. Kateb AU - , K. Chaoui 
JO  - Asian Journal of Information Technology
VL  - 5
IS  - 12
SP  - 1373
EP  - 1377
PY  - 2006
DA  - 2001/08/19
SN  - 1682-3915
DO  - ajit.2006.1373.1377
UR  - https://makhillpublications.co/view-article.php?doi=ajit.2006.1373.1377
KW  - Skirting
KW  -over-voltages
KW  -corona effect
KW  -pollution
KW  -short-circuit
KW  -insulation
AB  - In this study, it is shown that the corona effect attenuates and deforms atmospheric over-voltages which are propagated on the transmission lines. This contributes in a beneficial way to minimization of skirting of the insulators and makes it possible to avoid the short circuits from where a good continuity of service. This has been observed for over-voltages under different distances from its point of impact. The line was represented by its equivalent diagram, divided into N identical cells. The corona effect was simulated by a power source placed in parallel with the capacitor line. The load is simulated by 3 elements in parallel, a resistance, an inductance  and  a capacitor. The point of impact of over-voltage is taken as voltage source. Over-voltage is simulated by a shock wave 1.2/50 µs represented by an Bi-exponential function. Line of 220 Kv, a  60 km long was used. Equations of the propagation and the current leading to 2n+1 differential equations. The solutions of these equations enabled us to plot the representative curves of over-voltage with: 0; 1000;3000; and 7000 m. the method of Runge-Kutta-Verner was used for the resolution of the differential equations.
ER  -