Extended Day-Ahead Market ISO Balancing Authority Area Participation Rules Track A: Business Requirements Specifications Posted

The California ISO has posted the Extended Day-Ahead Market (EDAM) ISO Balancing Authority Area (BAA) Participation Rules Track A Business Requirements Specifications (BRS) to the Release Planning webpage, under the EDAM ISO balancing authority area participation rules track a heading.

On Feb. 1, 2023, market design for the Extended Day-Ahead Market (EDAM) was approved by the ISO Board of Governors. This design expands upon existing Western Energy Imbalance Market (WEIM) market rules to include Day-Ahead Market services for participating Balancing Authority Areas (BAAs). Previously, WEIM market rules only included the Real-Time Market timeframe. This business specification describes the impacts of a separate companion initiative called EDAM ISO BAA Participation Rules, which supports the Day 1 participation (e.g. bid submission, grid operations, and settlement) of the ISO BAA as an acting EDAM BAA within the market under the rules of its own tariff.

It is helpful to consider the EDAM ISO BAA Participation Rules Track A initiative as interdependent with the larger-scoped EDAM initiative, using its established framework to apply its own rules with regards to how it manages its EDAM export transfer constraints and settles its sub-allocations for transmission and market products through the transfer resources.

On Dec. 20, 2023, the Federal Energy Regulatory Commission (FERC) issued an order accepting the DAME and EDAM proposals, with the one exception: the EDAM access charge provision.

On June 11, 2024, FERC approved the EDAM access charge amendments in their entirety. In succession, the ISO will stakeholder the Access Charge implications for the ISO BAA’s participation in EDAM and submit its own tariff amendment on that basis. This document will retain Section 4.4 as a placeholder for the forthcoming requirements pertaining to the ISO BAA recovery of those wheel-through access charges that will be foregone by the EDAM market design.

Track A scope: Required for Day 1 of EDAM; ISO Board of Governors approved on Sept. 21, 2023.

Net EDAM Export Transfer Constraint’s Stressed Hours Assessment, Confidence Factor and Reliability Margin Evaluation
Allocations of Transfer Resource Settlement and Transfer Revenue Distribution
Allocations for RSE failure surcharges and revenues
(Forthcoming) Wheel-Through Access Charge Recoverable Revenue

Business Opportunity/Problem Statement:
What:	Implementation of the Extended Day-Ahead Market (EDAM) market design will require a set of market rules (distinct from the other WEIM BAAs) that direct how the CISO BAA will participate in EDAM. Track A of this project will implement the following: 1. Net EDAM Export Transfer Constraint’s Stressed Hours Assessment, Confidence Factor and Reliability Margin Evaluation 2. Allocations of Transfer Resource Settlement and Transfer Revenue Distribution 3. Solution for allocating RSE failure surcharges and revenues 4. (forthcoming) Develop revenue recovery mechanisms for wheel-through access charges (WACs) that will be foregone by the PTOs/SPTOs once the EDAM market design implements
Why do we have this opportunity/ problem:	The CISO BAA will participate in the forthcoming EDAM market, effective on Day 1.
Who does this opportunity/problem impact:	ISO BAA Scheduling Coordinators (SCs), Participating Transmission Owners (PTOs), Subscriber Participating Transmission Owners (SPTOs). Transmission Customers with rights held for transmission into the ISO BAA. EDAM BAA Entities

Business Opportunity/Problem Statement:

What:

Implementation of the Extended Day-Ahead Market (EDAM) market design will require a set of market rules (distinct from the other WEIM BAAs) that direct how the CISO BAA will participate in EDAM.

Track A of this project will implement the following:

1. Net EDAM Export Transfer Constraint’s Stressed Hours Assessment, Confidence Factor and Reliability Margin Evaluation

2. Allocations of Transfer Resource Settlement and Transfer Revenue Distribution

3. Solution for allocating RSE failure surcharges and revenues

4. (forthcoming) Develop revenue recovery mechanisms for wheel-through access charges (WACs) that will be foregone by the PTOs/SPTOs once the EDAM market design implements

Why do we have this opportunity/ problem:

The CISO BAA will participate in the forthcoming EDAM market, effective on Day 1.

Who does this opportunity/problem impact:

ISO BAA Scheduling Coordinators (SCs), Participating Transmission Owners (PTOs), Subscriber Participating Transmission Owners (SPTOs).

Transmission Customers with rights held for transmission into the ISO BAA.

EDAM BAA Entities

Contact information

Please contact Trang Vo @ tvo@caiso.com and/or submit a CIDI case.