Exploring IEEE C37.246-2017 Guide for Protection Systems of Transmission-to-Generation Interconnections

This paper covers principles of transmission-to-generation interconnection protection and summarizes the IEEE C37.246-2017, Guide for Protection Systems of Transmission-to-Generation Interconnections. The scope of the guide is to document accepted protection practices for transmission-to-generation interconnections and is intended to cover the protection system applications at the interconnections between transmission systems and generation facilities. Consideration is given to technical data needed to design a reliable transmission-to-generation interconnection and data exchange between the generator and transmission owners. All types of generation are discussed such as conventional and inverter-based. Typical transmission-to-generation interconnections are presented; their adequacy, complexity, strengths and limitations with respect to a variety of bus arrangements are discussed. System studies necessary for designing reliable interconnections are described. Protection system functions that are typically applied at transmission-to-generation interconnections and their settings considerations are thoroughly presented and discussed. Specific application guidelines are provided for tapped connections as they are the most complicated relative to interconnection protection.