A Congestion Mitigation Model of Transmission Network Considering the Participation of Distribution Companies in Power Market

Transmission congestion management in the power market requires coordination of controllable resources in the transmission network. This paper focuses on the massive number of distributed power sources and responsive loads in power distribution companies (PDCs), and a bi-level optimal dispatch model with distribution companies as the main body participating in transmission congestion in the power market is proposed. In the transmission network model, the load of the PDC and the traditional generator set are dispatched to alleviate transmission network congestion under the condition of minimum cost. In the PDC model, the unit adjustment cost and user satisfaction of the distribution company are taken as the objectives to schedule the resource. Considering the competition and compensation relationship of objectives in the model, a new multi-objective solution method is proposed to realize the effective scheduling of resources in the PDC. Moreover, the analytical target cascading (ATC) method is employed in the bi-level model to decouple the transmission network and PDC model. Finally, to illustrate the feasibility of the proposed model, simulation studies are conducted on the T6D2 system. The stability and effectiveness of the model are verified by multiple comparisons. © 2021. All Rights Reserved.