Allowable DG Penetration Capacity Calculation of SNOP-based Flexible Distribution Network

This paper adopts a new type of power electronics - soft normally open point (SNOP) to solve the bottleneck problem of bus/branch in distribution network, and improve the DG penetration capacity in flexible distribution network (FDN). Firstly this paper establishes the optimization model of the allowable capacity of DG in the FDN. A multi-population genetic algorithm (MPGA) is used to get the global optimal solution, in both traditional distribution network and FDN. Then this paper builds the system model of IEEE 33-bus distribution network to verify the conclusion, which finally proves that the application of SNOP in FDN will allow more DG accessing to the network. What is more, this method has certain reference value to determine the optimal capacity and access location of DG in the future FDN.