The Study Of Source/Grid/Load Optimal Dispatch For Active Distributed Network With Eletric Vehicles Coordinated Charging

With the severer environment and energy problems among the world, large-scale intermittent renewable energy and electrical vehicles (EV) are accessed to the power grid. Traditional passive distributed network's structure and dispatch methods can no longer meet the new changes, which calls for new distributed network to establish the real-time link between the generation side and demand side. Then comes the active distributed network (ADN), and it's corresponding dispatch strategy and management methods become an essential part in the field of the research on AND.In this paper, the optimal dispatch scheduling research status in AND is analyzed and the opportunities and challenges are summarized on the access of the DER and EV to the grid. A new coordinated control method of source/grid/load for the active distributed network is proposed as to alleviate the adverse effects of DER and EV charging load. On the long time scale, demand side management (DSM), coordinated charging strategy specifically, is adopted, which aims to adjust the grid daily load curve, minimize the EV charging cost and promote active local accommodation of DER. On the short time scale, the output control of DG, the rearrangement of the grid structure, along with the load-shedding strategy are coordinated to optimize the overall score on economical, environmental and operational performance of the AND. Finally, IEEE 33-bus system are used as case in this paper to certify the effectiveness of this dispatch model. The simulation results show that the proposed 3-stage coordination control strategy can improve the operational conditions economically and environmentally, satisfy the requirement of safety, reliability and quality of power supply, meanwhile handle the problems caused by large-scale access of intermittent renewable energy and electrical vehicles.