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Resources​
Western Energy Imbalance Market (WEIM) Participants
These resources are intended for WEIM entities and participating generators that are directly involved in the Western Energy Imbalance Market.
Business Practice Manuals
Business Practice Manuals contain implementation details through which the California ISO and market participants conduct business in accordance with the Tariff. The Business Practice Manual for Western Energy Imbalance Market contains information about all WEIM entity types.
Tariff
The Western Energy Imbalance Market is governed by the California ISO (ISO) FERC-approved Tariff. Each section or appendix of the tariff is maintained and updated independently according to effective dates of the FERC accepted tariff amendment
Integrate with the ISO full network model
The network model defines system parameters, price node and market scheduling limit mappings and planned network model updates.
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Western Energy Imbalance Market Full Network Model Schedule - 2025
5/08/2024 10:08
Western Energy Imbalance Market Full Network Model Schedule - 2024
9/12/2023 15:26
Western Energy Imbalance Market Full Network Model Scope Template
11/02/2020 15:43
Western Energy Imbalance Market Full Network Model Late Scope Change Request Form
3/30/2023 09:49
Western Energy Imbalance Market Generator Resource Data Template Version 18.0
8/02/2024 14:08
Western Energy Imbalance Market Interchange Definition Template
12/16/2020 10:24
Modeling Submission Checklist
9/10/2024 16:31
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WEIM Resource Onboarding Procedure
This procedure helps WEIM entities submit the required onboarding documentation for new participating and non-participating resources. The procedure also applies when a non-participating resource would like to become a participating resource.
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Energy Imbalance Market Scheduling Coordinator Request for BSCID - Letter Template
Western Energy Imbalance Market Procedure for Non-Participating and Participating Resources
12/17/2024 12:06
Summarizes the process to set up, convert or end date participating or non-participating resources in the WEIM market.
WEIM - New Scheduling Coordinator Acceptance - Resource - Letter Template
7/31/2024 09:39
For use when setting up a new or transferring an existing WEIM resource
WEIM - Resource Owner Scheduling Coordinator Selection - Letter Template
7/31/2024 09:39
For use when setting up a new or transferring an existing WEIM resource
WEIM - Transfer - Resource Relinquishing Scheduling Coordinator - Letter Template
7/31/2024 09:39
For use when transferring or end dating SC association for WEIM resources
WEIM - Transfer - Resources Between BSCIDs - Same Scheduling Coordinator
7/31/2024 09:39
For use to transfer existing WEIM resource BSCID to another BSCID within the same company
Resource Control Agreement Disclosure Form
8/02/2024 14:08
For use with new resource configuration and resource transfers
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Transmission customers of WEIM entities
Our computer based training modules are for Transmission Customers of WEIM Entities to learn about participation in the WEIM, the real-time market, base schedules, system outages, metering and settlements. For WEIM updates,
subscribe to news releases and notices
.
Transmission customers should contact their WEIM entity for most questions. For all other questions,
contact ISO customer service
.
Section 29 of the ISO Tariff addresses the provisions related to the Western Energy Imbalance Market. Appendix B. 17 – 20 contains agreements related to WEIM participation.
Regulatory Filings
All publicly available California ISO-authored filings and FERC orders are posted on the ISO website.
ISO Department of Market Monitoring
The ISO Department of Market Monitoring (DMM) keeps a close watch on the efficiency and competitiveness of the Western Energy Imbalance Market. Links to tariff provisions discussing DMM’s role and responsibilities and various DMM reports, presentations and tariff filings are available on the ISO website.
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ISORichHTML
Computer Based Training (CBT)
Get ready to participate in WEIM
​
Leading the WEIM Transition
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The Basics of the Real-time Market
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Base Schedules Foundational Concepts
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System Outages Foundational Concepts
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Metering Foundational Concepts
​Settlements Foundational Concepts
EDAM Participation Structure Overview
Learning center courses
Western Energy Imbalance Market training
Explore topics pertaining to the real-time energy imbalance market that enables participants to buy and sell energy when needed.
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Test
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1/28/2025 16:16
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Update Document Title
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Remove Page Link
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Delete
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Test
description
Test
1/28/2025 16:16
test link
Rename Group
View/Edit Properties
View Impact
Add Existing Group/Document
New Group
New Page Link
Remove Group
Undo Changes
Copy Item
Paste
Paste as Child
Paste Above
Paste Below
Move
Move as Child
Move Above
Move Below
Update Document Title
View/Edit Properties
View Impact
Remove Document
Delete Document
Undo Changes
Copy Item
Paste
Paste as Child
Paste Above
Paste Below
Move
Move as Child
Move Above
Move Below
View Impact
View/Edit Properties
View Impact
Remove Page Link
Create a copy
Delete