Reliability of reconfigurable distribution systems including distributed generation

This paper deals with the reliability analysis of a radial distribution system with local generation sources, considering how the possible formation of intentional islands, associated to the reconfiguration of the distribution systems through redundant branches, could enhance the effectiveness of the service restoration process. A dedicated procedure has been developed to assist the possible formation of intentional islands with fixed or variable extension. The characteristics of the procedure are illustrated by means of a number of examples. Finally, an example showing the possible use of DG resources to defer structural investments for the distribution system expansion is presented.