Dynamic reconfiguration of distribution network with electric vehicles and soft open point

A reconfiguration strategy for distribution network with DG（Distributed Generation），SOP（Soft Open Point） and orderly access of EVs（Electric Vehicles） is proposed. The disordered charging model of EVs is simulated based on the travel habits of office workers，and the SOP model under the reconfiguration of distribution network is constructed. For the disordered charging load of the accessed EVs，Lagrange relaxation decentralized optimization algorithm and virtual electricity price are adopted for orderly scheduling of EVs. The minimum sum of network loss cost，SOP operation cost，curtailment cost of wind power and photovoltaic power and switch operation cost is taken as the objective function，the reconfiguration model of distribution network is converted to a mixed-integer second-order cone programming model by big-M method and the second-order cone relaxation，and CPLEX solver is adopted for solution. The simulative results of IEEE 33-bus standard system show that the operation economy of distribution network can be improved by using SOP instead of traditional switch in the dynamic reconfiguration of distribution network，and the voltage quality of distribution network can be improved by adopting the proposed orderly scheduling method for the optimization of EV charging. © 2022 Electric Power Automation Equipment Press. All rights reserved.