Abstract
One of the primary causes of major transmission line outages are severe weather conditions particularly lightning, wind and conductor icing (e.g., Quebec, U.S ice storms of 1998). The statistical results of a detailed analysis of Alberta Power Limited's transmission line outage data base and Alberta Environmental Service weather data bases over a 20 year period are investigated in this paper. The analysis reveals the significance of the geographical location of the transmission lines and their frequency of outages. The paper also reveals that the number of transmission line outages is not necessarily proportional to the physical length of the line for many transmission lines which contradict many published methodologies. The paper presents a Monte Carlo simulation reliability model of transmission line network configurations based on the historical Canadian Electricity Association's utility equipment reliability data base and the Environmental Service weather data bases
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