Analysis of the impact of DG on distribution network reconfiguration using OpenDSS

The integration of distributed energy resources into low and medium voltage networks will have profound impact on distribution network reconfiguration. In this paper, the impact of DG on distribution network reconfiguration is analyzed in both normal operation and post-fault scenarios with different load levels. Distribution system simulation is performed with the Open Distribution Simulator Software (OpenDSS). Due to the intrinsic nonlinear and non-differentiable mixed-integer nature of the problem, simulated annealing is used as the optimization algorithm. Using the proposed method, a case study of IEEE 33-bus system gives positive conclusions: in normal operation, the integration of DG increases the number of distribution network reconfiguration feasible solutions and reduces the total network loss of the optimal solution; while in post-fault condition, feasible solution can emerge with the integration of DG where there isn´t any feasible solution originally. The integration of DG helps to ensure network power supply.