Cooperative sequential reconfiguration for distribution networks

With huge penetration of distributed generators (DGs), distribution systems become more and more active and flexible. To accommodate DGs in a much more optimal way, cooperation between transmission networks and distribution networks, even distribution networks and distribution networks, should be further strengthened. A cooperative sequential reconfiguration method is proposed in this paper, which is designed to achieve the optimization of multiple distribution networks in a coordinated way rather than in an isolated way. The global power flow is calculated to reflect interactions among various networks. A sequencing index is introduced for guiding distribution networks to be reconfigured sequentially, which is based on the absolute value of voltage variation at boundary nodes. Reconfiguration for each distribution network is implemented by using the improved optimal flow pattern algorithm. The effectiveness of the proposed method is verified by the simulation results with total active power loss reduction and voltage quality improvement.