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Interconnection standards are rules that spell out how projects owned by customers or developers connect to the utility system. These rules provide a standardized process and schedule so that interconnections can be accommodated in an orderly and timely manner. The rules also ensure that interconnections are done safely, in order to protect workers, utility and third-party owned equipment, and the public. As a result of the work done by the MI Power Grid Interconnection & Worker Safety workgroup, new interconnection rules known as the Michigan Interconnection and Distributed Generation Standards (MIXDG rules) became effective on April 25, 2023.
Statewide Standard Agreement for Level 1, 2, and 3 Interconnection Project
The MIXDG rules require that utilities and coops use a statewide standard interconnection agreement for all level 1, 2, and 3 interconnection projects. The Commission issued an order in Case No. U-21543 requesting comments on a proposed standard level 1, 2, and 3 interconnection agreement which was attached to the order as Exhibit A. Comments must be received no later than 5:00 p.m. on March 27, 2024. Reply comments are due no later than 5:00 p.m. on April 26, 2024. Please see the order for details about how to provide comments.
Michigan Interconnection and Distributed Generation Standards Interconnection Procedures Cases
Each utility’s and member-regulated coop’s interconnection procedures provide details for interconnection customers about the implementation of the MPSC’s Michigan Interconnection and Distributed Generation Standards (MIXDG rules) which became effective on April 25, 2023. On August 23, 2023, rate-regulated utilities and member-regulated co-ops (jointly filing in Case No. U-21481) filed interconnection procedures, forms and requests for waivers in the individual dockets pursuant to R460.920(1). In light of the DG provisions in the new energy laws (which supersede the MIXDG rules), the Commission issued an order in Case Nos. U-21455 et al. and directed the utilities to file new applications with updates to reflect the new DG provisions by March 22, 2024. Comments on the new applications may be filed in case dockets by May 22, 2024, with reply comments due June 5. Please see the order for details about how to provide comments. The Commission’s implementation of the new DG provisions in Public Act 235 of 2023 may be followed on the 2023 Energy Laws Distributed Generation and Interconnection webpage.
U-21455 Northern States Power Company
U-21467 Indiana Michigan Power Company
U-21477 Upper Peninsula Power Company
U-21479 Upper Michigan Energy Resources Corporation
U-21480 Consumers Energy Company
U-21481 Cooperatives (Alger Delta Cooperative Electric Association, Cherryland Electric Cooperative, Cloverland Electric Cooperative, Great Lakes Energy Cooperative, HomeWorks Tri-County Electric Cooperative, Midwest Energy & Communications, Ontonagon County REA, Presque Isle Electric & Gas Co-Op, and Thumb Electric Cooperative)
Hosting capacity maps are available for portions of Consumers Energy's and DTE Electric's service territories.