On Tie-Line Scheduling in Multi-Area Power Systems
Abstract: For historical and technical reasons, different parts of an interconnected power system and its associated assets are managed by different system operators (SOs). Transmission lines that connect different operating areas are referred to as "tie-lines." Tie-lines often have enough transfer capability to fulfill a significant portion of each area’s power consumption needs. Thus, they are important assets for multi-area power systems. However, reports conducted by real system operators indicate that the current tie-line scheduling technique has resulted in substantial economic losses, estimated to the tune of $784M for NYISO and ISO-NE between 2006 and 2010.
In this presentation, I will describe the background and modeling of the tie-line scheduling problem, review some benchmarks on this topic, and present our recent research progress. Namely, we designed an efficient solution of the multi-area economic dispatch problem, which sets the baseline of tie-line scheduling, that converges within finitely many steps. I will also introduce a generalized coordinated transaction scheduling approach considering the market structure in the United States, wherein individual system operators are proved to have better local performance and achieve their revenue adequacies.
Bio: Ye Guo is a postdoctoral associated at the School of Electrical and Computer Engineering, Cornell University. He received his doctor degree from Tsinghua University, China, in 2013. His research interest encompasses a wide range of topics in the field of electric power systems, such as the coordinated optimization of multi-area power systems, power system state estimation, integration of renewable generations, and distribution networks.