Minnesota Public Utilities Commission Order (April 11, 2023) conditionally adopting amended Technical Interconnection and Interoperability Requirements (TIIR) for grid edge resources. These requirements establish statewide technical standards for connecting alternative energy systems to the grid, with specific focus on advanced "smart" inverters. The order specifies implementation timelines and interim requirements, while the attached TIIR document details comprehensive technical standards for equipment performance, grid protection, metering, interoperability, and testing requirements. The new standards will take full effect when IEEE 1547-2018 advanced inverters become readily available in the market.

Grid-forming inverter-based resources and modeling and simulation tools are required for studying them.

Recommendations on adopting Minimum Statewide Default Standards (MSDS) for smart inverters or distribution utility-specific inverter settings.
IEEE 1547-2018 smart inverter functions of importance and associated policies and defaults proposed by the working group for statewide standards.

Recommendations—Technical—Adopting functions of inverter-based grid edge resource systems.