Read topic-matched comments in ER26-3650
Topics in the text: Registry access · Cost allocation
Midwest Transmission Dependent Utilities · Direct response
The utilities said MISO’s answer disclaimed applying the rules to distribution-connected loads but the tariff still did not say so unambiguously. They wanted the tariff to explain how a utility could assign a compliance task to the large load.
PDF p. 2Printed headings where available; page ranges otherwise. Excerpts below are selected from the text by keyword.
opening text · Topic match: Registry access
Several parties expressly support the proposal or its core reliability framework, while other parties seek clarification or additional detail regarding implementation.7 Notably, only one protest requests the revisions to be rejected and MISO directed to file revised requirements by the end of…Read this passage
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I.Read this passage
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BACKGROUND The IRR Proposal is an important near-term component of MISO’s broader response to rapidly accelerating Large Load development.Read this passage
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MISO therefore respectfully requests waiver of Rule 213(a)(2) and acceptance of this Answer.Read this passage
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III.Read this passage
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Within MISO’s 50 MW Large Load applicability threshold, a 25 MW computational component provides an objective quantitative indicator that the facility contains material computational content and is therefore 44 Proposed Tariff § 37A.I; IRR Proposal at 11-12, 22-26. 45 IRR Proposal at 11-12; Li…Read this passage
printed heading · Topic match: Registry access
The process for making that determination and identifying which requirements must apply will be set forth in the Large Load BPM.71 This targeted reliability backstop preserves commercial certainty while allowing MISO to apply otherwise-exempt requirements where the Tariff’s reliability criterion is…Read this passage Filed comments: Cost allocation
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Because Large Loads rely on fast-acting controls, power-electronic interfaces, and increasingly sophisticated uninterruptible power supply systems, the detailed technical parameters that govern telemetry, PMU configuration, forecasting formats, ride-through curves, testing protocols, and ramp-rate…Read this passage
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MISO must be able to obtain, through the Transmission Customer, all information and operational access necessary to evaluate, monitor, and verify Large Load behavior under Section 37A, including the facility data, electrical models, telemetry, PMU measurements, and forecasting inputs required to…Read this passage
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CONCLUDING ARGUMENTS The IRR Proposal should be accepted as filed.Read this passage
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NOTICE AND SERVICE MISO has served a copy of this filing electronically, including attachments, upon each person designated on the official service list compiled by the Secretary as well as on all Tariff customers, MISO Members, Member representatives of transmission owners and non- transmission…Read this passage
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V.Read this passage
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CONCLUSION MISO respectfully requests that the Commission (i) accept this Answer and (ii) accept the IRR Proposal without modification or condition.Read this passage
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Dated this 13th day of October 2026, in Carmel, Indiana. /s/ Julie Bunn Julie Bunn Midcontinent Independent System Operator, Inc. 720 City Center Drive Carmel, IN 46032 317-249-5400Read this passage