1.College of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China;2.Shinan Electricity Supply Company of State Grid Shanghai Municipal Electric Power Company, Shanghai 200030, China;3.Electric Power Dispatching and Communication Center of State Grid Shanghai Municipal Electric Power Company, Shanghai 200122, China

In order to alleviate the operation and backup pressure caused by the integration of large-scale distributed energies into the active distribution network, it is necessary to fully utilize various flexible resources to cope with various uncertainties. This paper proposes a two-stage distributed economic model for day-ahead and intraday dispatching considering the flexible aggregated power. Firstly, a virtual battery model is established to integrate the clusters of multiple distributed and flexible resources in the active distribution network. Based on the constrained space superposition method with Minkowski sum, an adjustable aggregated power domain is obtained, which is used as a constraint to connect the day-ahead and intraday real-time dispatching. Secondly, in intraday rolling stage, a distributed coordinated optimal dispatching model for transmission and distribution networks considering the flexible aggregated power is proposed. Moreover, combining the consistency algorithm and frequency regulation control, an uniform dispatching control strategy is proposed to distributely solve the economic dispatching model of each aggregated equivalent cluster with flexible aggregated power. Finally, a case verifies the effectiveness of the proposed method. The dispatching department can obtain the flexible reserve power interval and the adjustable power domain while obtaining the optimal power distribution plan of the active distribution network in each distributed resource cluster, which helps dispatchers make full use of various flexible resources to revise the day-ahead plan and effectively deal with various uncertain factors.