Research on reliability evaluation of the distribution grid based on loop outage model

Recently State Grid Corporation has issued the Implementing Rules of Reliability Evaluation of Transmission System (IRRETS), in which the loop is firstly introduced into the reliability evaluation. Accordingly the reliability evaluation of the distribution grid can be based on loop-outage model instead of the basic elements. The evaluation can be made through three levels: element-loop-system. In the IRRETS, the definition of the loop and the outage category are defined, the reliability indexes are developed on statistics. However, the IRRETS has not addressed how to product reliability evaluation of the distribution grid based on Loop outage model. The reliability evaluation of basic loop and distribution network are developed in this paper based on the concept of loop in IRRETS. the feasibility and accuracy of the algorithm is verified by the simulated results of the IEEE-RTS 79 system. Thus the proposed algorithm based on loop outage model can be used widely in the reliability evaluation of the distribution grid.