Abstract:
The district integrated energy system (DIES) with multiple energy stations has the characteristics of having multi-level and multi-operators, so it is challenging to adopt the traditional centralized method to optimize the dispatching. To ensure the interests and privacy of different operators, a distributed coordinated dispatching for district integrated electric-thermal energy systems considering the ladder-type carbon trading mechanism is proposed. Firstly, the characteristics of operators are analyzed, and an integrated energy system model is constructed considering the dynamic characteristics of the heat supply network and the power interaction between energy stations. On this basis, a bi-level optimal dispatch model of an integrated energy system is built: In the system dispatching layer, the economy and low-carbon characteristics are taken as the goals; In the energy station dispatching layer, the energy station adjusts its scheduling strategy to maximize the benefits according to the optimization results of the system dispatching layer. The analysis target cascade (ATC) algorithm decouples the interaction variables, and a solution is proposed to achieve the intra-layer iteration and inter-layer interconnection. The simulation results verify that the proposed distributed coordinated dispatching method improves the low-carbon economic level of the DIES. By taking into account the interests of each operator through the distribution optimization, it better meets the actual scheduling needs.