Customer outage cost evaluation of an actual failure event

The customer interruption cost when an electric supply failure occurs depends on many factors, such as the customer types interrupted the actual load demand at the time of the outage, the duration of the outage, the time of day and the day in which the outage occurs. This paper illustrates the development of a procedure to perform customer outage cost evaluation on a distribution feeder subjected to a specific outage event. The data required to perform a complete evaluation is illustrated and discussed This data includes the feeder customer compositions, the profiles at the feeder load points and the relevant customer damage functions. The procedure presented in the paper is illustrated by application to a specific distribution feeder in the City of Saskatoon. The customer costs associated with power supply failures are a function of the time of the day, 4, of the week and time of the year. They are also strongly influenced by the duration of the outage event. The paper illustrates the effect of outage duration and the time of outage occurrence.