4Billinton R, Wang P. Reliability network equivalent approach to distribution system reliability evaluation [J]. IEE Proceedings Generation, Transmission and Distribution, 1998, 145 (2): 149-153.
8Xie Kaigui, Zhou Jiaqi, Billinton R. Reliability evalu- ation algorithm for complex medium voltage electrical distribution networks based on the shortest path [ J ]. IEE Proeecdings C, 2003, 150 (6) : 686-690.