Abstract
A discrete-event simulation system has been created for obtain ing probability distributions of load point reliability indices in an electricity supply system. The modeled behavior of transmis sion components includes temporary and permanent faults, com mon mode faults, maintenance, switching after permanent fault, breaker failure to open, closing of normally opened breakers, and fluctuating weather environment. Also, the simulation system can study the effect of parameter uncertainty when there is limited component outage data or weather data.