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MPSC adopts critical‑facility resilience rules, approves DTE interconnection procedures and multiple utility orders
Summary
The Michigan Public Service Commission unanimously approved a staff package on critical‑facility resilience that includes a 72‑hour restoration expectation for hospitals and other essential sites, and adopted detailed interconnection procedures for distributed generation after a settlement with multiple intervenors; commissioners also approved a series of utility orders by unanimous vote.
The Michigan Public Service Commission on Dec. 5 approved a staff‑recommended package aimed at improving resilience for critical facilities and a separate settlement adopting new interconnection procedures for distributed generation.
Commission Chair Dan Scripps and staff framed the resilience order (case U‑21388) as a response to years of reliability work and recent technical conferences. Staff member Julie Driven told commissioners the docket grew out of a 2023 technical conference and a December 2024 straw proposal and now contains 13 refined recommendations, including stronger utility–staff communications before, during and after storms, annual meetings between investor‑owned utilities (IOUs) and emergency managers, and biannual reviews of critical‑facility lists.
The order adds a targeted service‑restoration expectation: utilities should restore power to designated critical facilities within 72 hours following major outages in extreme conditions, a standard the commission said aligns with hospital preparedness requirements. Commissioners said the requirement would close an identified gap between reliability planning and post‑event recovery, and they emphasized exercises, outreach to tribal governments, and improved data sharing with state emergency managers.
Separately, the commission approved a comprehensive settlement in case U‑21482 that finalizes interconnection procedures required under rule 20. Staff member Cody Matthews said the settlement—filed Nov. 6 after months of comment, hearings and settlement negotiations—clarifies how DTE will evaluate distributed generation project sizing, when islanding or hosting‑capacity studies are required, and how inverter/PCS controls will be used to limit exports. The settlement drew support from clean‑energy developers, utilities and intervening parties, the commission said.
Commissioners approved both orders and a series of additional utility items by unanimous vote, including power‑supply cost recovery reconciliations, limited waivers, and gas‑safety rule amendments. Commissioners noted the approvals do not eliminate future oversight and that several items instruct staff to follow up with utilities on implementation plans.
The commission scheduled its next regular meeting for Dec. 18, 2025.
