Overview
In 2025, the Indiana General Assembly passed Senate Enrolled Act 422, which tasked the Commission with conducting a study on advanced transmission technologies (ATTs) by Oct. 1, 2026. The study must take into consideration various aspects of ATT, such as the benefits of ATT and potential to streamline the deployment of grid-enhancing technologies. Electric Power Engineers, LLC was chosen to help conduct the study, and in preparation for it, the Commission collected comments from stakeholders and held a virtual stakeholder meeting in July.
The study was completed and submitted to the Indiana General Assembly in September 2026 and below is some information and links to the five components that made up the study.
About the study
Together, these deliverables form an integrated structure for considering ATTs. The ATT Framework establishes the technical foundation; the Thermal and Voltage ATT Procedures translate that foundation into a structured screening process for specific system violations; the Streamlining ATT Deployment Process places the evaluation within the broader implementation process; and the Technology Attribute Matrix connects the technologies to the statutory objectives established for the study.
Collectively, they provide a consistent and technically informed approach for considering ATTs as potential solutions to transmission system needs.
- ATT Framework: The Framework provides the technical foundation for the project, including technology background, use cases, industry practices, implementation considerations and challenges, and modeling approaches.
- Thermal ATT Procedures & Voltage ATT Procedures: These procedures provide step-by-step decision processes using screening variables, decision points, and event-tree logic to move from an identified system violation to a set of potentially applicable ATTs for further engineering evaluation.
- Streamlining ATT Deployment Process: This document provides the broader process perspective and addresses downstream considerations associated with evaluating and advancing ATTs, including stakeholder engagement and other implementation considerations.
- Technology Attribute Matrix: The matrix maps the evaluated ATTs to the statutory objectives and provides an indication of the relative potential benefits associated with each technology.
Stakeholder Surveys
The Commission requested responses to questions from electric utilities and comments from stakeholders:
- IURC Request to Indiana Electric Utilities | Word
- IURC Request for Stakeholder Comments | Word
- IURC Request for RTO Comments | Word
Responses to the EPE questions and/or first round of comments were due no later than June 3, 2026, to URCComments@urc.in.gov.
Comments Received
The Commission received the following comments:
- CenterPoint Energy Indiana - Electric Utility | PDF
- Duke Energy Indiana - Electric Utility | PDF
- Hoosier Energy | PDF
- Indiana Michigan Power (I&M) | PDF
- Northern Indiana Public Service Company (NIPSCO) | PDF
- Wabash Valley Power Association (WVPA) | PDF
- ACORE | PDF
- CenterPoint Energy Indiana - Stakeholder | PDF
- Citizens Action Coalition of Indiana (CAC), Environmental Law & Policy Center (ELPC), Solar United Neighbors (SUN), & Vote Solar | PDF
- Duke Energy Indiana - Stakeholder | PDF
- Pew Charitable Trusts | PDF
- WATT Coalition & AMP Coalition | PDF
- PJM Interconnection | PDF
Contact
If you have questions about the Advanced Transmission Technologies Study, please contact the Commission’s General Counsel’s office at 317-232-2701.