Distributed Robust Dynamic Economic Dispatch of Integrated Transmission and Distribution Systems

To coordinate the generation resources located in the integrated transmission and distribution systems (ITD) considering renewable uncertainty, dynamic economic dispatch (DED) is essential. In this paper, a coordinated robust DED (CRDED) model is proposed to enhance the cost-effectiveness and reliability in a system perspective. A distributed framework based on the alternating direction method of multipliers (ADMM) is presented to solve this model in a decentralized way, with the transmission and distribution systems solve their regional problems autonomously. To handle the problem that it is hard to predetermine the value of penalty factors, a varying penalty factor strategy is further applied to enhance the convergence property of ADMM, with the global optimal solution achieved within much fewer iteration numbers. Since only the boundary power needs to be exchanged between the transmission and distribution systems, the communication burden is light and the regional information of different operators is encrypted. Case studies on the T118D10 system illustrate the effectiveness of the proposed model and approach.