NERC Grid Map

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How to read it

Each bubble is one organization, near its headquarters.

Color role mix Size role tier Dotted no NERC ID

Size shows role tier: ISO/RTOs and reliability authorities are largest, grid operators and utilities are medium, single-role market or generation entities are smallest.

Color shows the mix of roles — see the abbreviations below.

Dotted outline = not in the NERC registry (no NERC ID).

Role abbreviations

Grid authority

RC Reliability Coordinator BA Balancing Authority PC Planning Coordinator TOP Transmission Operator TSP Transmission Service Provider

Planning & coordination

TP Transmission Planner RSG Reserve Sharing Group FRSG Frequency Response Sharing Group RRSG Reactive Reserve Sharing Group RP Resource Planner

Asset, load & market

TO Transmission Owner GO Generator Owner GOP Generator Operator LSE Load-Serving Entity DP Distribution Provider PSE Purchasing-Selling Entity

Source: NERC Active Compliance Registry Matrix (Functions)