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Considerations for Interconnection of Large Power Grid Networks

Interconnection i.e. the wide-area synchronous operation of large power systems using ac interties has provided opportunities to improve system reliability and better connect the ever-increasing renewable generation locations to load centers. While some of these goals are achievable with dc ties, ac connections and synchronous operation have unique advantages as well as certain challenges that need to be carefully studied. This paper aims to highlight the key issues that need to be considered in assessing the feasibility of the synchronous interconnection of large power grids, with a focus on dynamics. To provide realistic results without revealing confidential information about the actual grid, the paper makes use of synthetic grid models for the US Eastern and Western Interconnect footprints.