Markets and operators · Definition
Independent system operator (ISO)
An independent organization that operates a regional transmission system and may administer wholesale electricity markets.
In plain languageAn independent organization that operates a regional transmission system and may administer wholesale electricity markets.
- Category
- Markets and operators
- Primary reference
- Federal Energy Regulatory Commission
Why it matters
How this term helps you read grid data
ISOs coordinate grid operations across multiple utilities, helping manage transmission access, reliability, and regional market dispatch.
Example
Independent system operator (ISO) in practice
CAISO and NYISO are independent system operators represented in US Grid Explorer's region profiles.
Reference
Check the primary source
US Grid Explorer paraphrases agency terminology for clarity. Consult the agency reference for formal definitions and current regulatory usage.
Federal Energy Regulatory Commission →