• Journal of the Korea Academia-Industrial cooperation Society
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• v.9 no.4
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• pp.899-904
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• 2008

This paper deals with the analytical approach for the reliability assessment in radially operated distribution systems. The approach can estimate the expected reliability performance of distribution systems by a direct assessment of the configuration of the systems using the reliability indexes such as NDP(Non-Delivery Power) and NDE(Non-Delivery Energy). The indexes can consider the number and configuration of the load. but can not consider the characteristics of the load which is the one of the most important factor in the investment cost for the distribution systems. Therefore, this paper presents the new indexes considering the expected interruption cost for the load section and shows the effectiveness by simulating at the model systems.