Assessment of electricity supply interruption costs under restricted time and information resources

摘要

Customers' perceptions of reliability do not always reflect the level of reliability purported by traditional reliability indices. Thus the electricity supply industry strives to relate reliability investments with customers' benefits obtained from such investments. A difficulty encountered by such efforts is the lack of appropriate valuation of these benefits. With a view to correcting this paucity, the authors have conducted a study aimed at assessing the characteristics needed to estimate the customer interruption costs in different customer sectors of Estonia due to electric service interruptions. Because the time frame stated for the study was relatively short for the comprehensive large scale customer survey the results of the preliminary pilot survey were complemented with indirect analytical methods on base of GNP and annual household income as well as on base of analysis of corresponding characteristics of other countries. The final estimates for different customer sectors as well as for the whole country were found averaging estimates found by different methods. Estimated were characteristics of cost models most widely used by power system planners.