Title :
Insulation failure assessment under random energization overvoltages
Author :
Mahdy, A.M. ; Morshedy, A.E. ; Anis, H.I.
Author_Institution :
Cairo Univ., Egypt
Abstract :
The authors offer a simple approach to the evaluation of the risk of failure of external insulation based on its known probabilistic nature. This is applied to extra high voltage (EHV) transmission systems subjected to energization overvoltages. The randomness both in the applied stresses and insulation´s withstand characteristics are numerically simulated and then integrated to assess the risk of failure. Overvoltage control methods, such as the use of preinsertion breaker resistors, series capacitive compensation and shunt reactors, are accounted for.<>
Keywords :
cable insulation; electric breakdown; electric strength; failure analysis; power cables; power transmission lines; probability; reliability; transmission networks; EHV; electric breakdown; electric strength; external insulation; failure analysis; power cables; preinsertion breaker resistors; probability; random energization overvoltages; reliability; series capacitive compensation; shunt reactors; stresses; transmission systems; withstand characteristics; Cable insulation; Capacitors; Circuit breakers; Inductance; Lightning; Power transformer insulation; Stress; Surges; Switching circuits; Voltage;
Conference_Titel :
Industry Applications Society Annual Meeting, 1992., Conference Record of the 1992 IEEE
Conference_Location :
Houston, TX, USA
Print_ISBN :
0-7803-0635-X
DOI :
10.1109/IAS.1992.244239
