Transmission-Distribution Coordination Working Group

Working Groups

To support both transmission and distribution level reliability, transmission-distribution (T-D) coordination processes are needed to better integrate DERs in wholesale system and market operations. The IESO, Local Distribution Companies (LDCs), and DER participants will need to share information in a timely manner and ensure there is sufficient awareness (e.g., with respect to outages, limits on DERs, and dispatch of DERs, etc.) among the parties. If distribution services are also sought from DERs, then T-D coordination processes will also be needed to ensure there are no conflicting instructions, double counting, or other unintended consequences.

In this context, the IESO is launching the Transmission-Distribution Coordination Working Group (TDWG) to work closely with LDCs and other stakeholders to inform the DER Market Vision and Design Project. The Market Vision and Design Project is a key focus area of IESO’s DER integration activities and is what much of the near-term DER Roadmap efforts build towards. The TDWG will provide a forum for in-depth engagement on T-D coordination.

The TDWG’s overarching objective is to support the IESO in developing conceptual coordination protocol(s) that detail the communications among the IESO, LDCs, and DER participants for participation in the IESO-Administered Markets.

Related Engagements

Distributed Energy Resource Roadmap

DER Market Vision and Design Project

IESO York Region Non Wires Alternatives Demonstration Project

Innovation and Sector Evolution White Paper Series

Schedule of Activities

Date	Activity	Expected Actions
March 28, 2024	Working Group Meeting #12 Feedback form
March 15, 2024	Deadline for stakeholder feedback on topics presented at the February 16th webinar. Feedback Received ENWIN Utilities Ltd.
February 16, 2024	Working Group Meeting #11 IESO Introduction B1 - Process & User Journey Map Feedback form Meeting notes
January 11, 2024	Deadline for stakeholder feedback on topics presented at the December 14th webinar. Feedback Received Essex Power
December 14, 2023 Meeting Notes	Working Group Meeting #10 IESO Introduction T-D Coordination to Support Reliable Performance of BPS with DER Integration B1 Deliverable-Architecture Feedback form
November 17, 2023	Deadline for stakeholder feedback on topics presented at the December 8th webinar. Feedback Received Alectra
December 8, 2023 Meeting Notes	Working Group Meeting #9 IESO Introduction Glossary of Working Terms & Definitions Current State of Communications Feedback form
November 17, 2023	Deadline for stakeholder feedback on topics presented at the October 27th webinar. Feedback Received Essex Power Non-Wires Solutions Working Group
October 27, 2023 Meeting Notes	Working Group Meeting #8 Introduction and Feedback Summary SOW A - Coordination Protocols (Oct 27) SOW B1 - Functional Assessment (Oct 20) SOW B2 - Communication Assessment (Oct 20) SOW B3 - Shared Platform (Oct 27) SOW B4 - Architectural Assessment SOW (Oct 27) Feedback form
July 7, 2023	Deadline for stakeholder feedback on topics presented at the June 16th webinar. Feedback Received eCAMION Electricity Distributors Association Essex Power Hydro one Toronto Hydro Non-Wires Solutions Working Group
June 16, 2023 Meeting Notes	Working Group Meeting #7 Introduction Draft Terms of Reference Deliverables and Work Plan Feedback - Draft T-D Coordination Protocols - Alectra Operational Coordination Functions Under Different DSO Models - ICF Feedback form
March 20, 2023	Deadline for stakeholder feedback on topics presented at the February 27th webinar. Feedback Received Electricity Distributors Association Hydro One Non-Wires Solution Working Group Toronto Hydro
February 27, 2023 Meeting Notes	Working Group Meeting #6 Introduction and Feedback Summary Total DSO T-D Coordination Transmission Planning in Ottawa Distribution Planning in Ottawa Distributor Perspective Feedback form
November 30, 2022	Deadline for stakeholder feedback on topics presented at the November 9th webinar. Feedback Received: Essex Powerlines Hydro One NODES Non-Wires Solutions Working Group Toronto Hydro
November 9, 2022 Meeting Notes	Working Group Meeting #5 Introduction & Feedback Summary Market Vision Project T-D Update D-D Coordination Draft T-D Coordination Protocol Feedback form
October 4, 2022	Deadline for stakeholder feedback on topics presented at the September 13th webinar. Feedback Received Hydro One OEC Toronto Hydro
September 13, 2022 Meeting Notes	Working Group Meeting #4 Presentation Distribution Outages Toronto Hydro Local Demand Response Pilot Joint Utilities of New York Coordination and Communication Feedback form
July 20, 2022	Deadline for stakeholder feedback on topics presented at the June 29th webinar. Feedback Received Electricity Distributors Association (EDA) Hydro One Hydro Ottawa Non-Wires Solutions Working Group (NWSG) Oakville Hydro and Oakville Enterprises Companies (OEC) Toronto Hydro
June 29, 2022 Meeting Notes	Working Group Meeting #3 Presentation IESO DER Market Vision Project Update Distribution Override Illustration IESO Outage Management IESO Market Renewal Program Feedback form
June 6, 2022	Deadline for stakeholder feedback on topics presented at the May 16th webinar. Feedback Received Alectra Utilities Hydro One Non-Wires Solutions Working Group Toronto Hydro
May 16, 2022 Meeting Notes	Working Group Meeting #2 Final Terms of Reference Presentation Transmission-Distribution Coordination Considerations DER Scenarios and Modelling TDWG: Sub-Transmission System Feedback form
January 31, 2022 Meeting Notes	Working Group Meeting Introduction to TDWG Draft Terms of Reference IESO DER Market Vision Project T-D Coordination Background DER Scenarios & Modelling Study
November 17, 2021	IESO Bulletin request for working group membership