Reliability-Constrained Back-Up Power Sources Planning for Distribution Networks

To guarantee the power supply reliability of some critical customers, back-up power sources may be needed when sustained faults occur in distribution networks. In this paper, back-up power sources including back-up distributed generators (DG) and uninterruptible power supply (UPS) are optimally placed and sized with explicit reliability constraints for not only distribution system but also specific customers. This model is then cast as an instance of mixed integer linear programming and can be effectively solved by on-the-shelf software. Case studies on a 53-node distribution network show the scalability and efficiency of the proposed model.