LEARN / GLOSSARY
Balancing authority
The entity responsible for keeping electricity supply and demand in balance in real time across a defined portion of the grid. It is the operating unit of the American power system, and there are roughly seventy of them.
Definition
A balancing authority ensures, in real time, that power system demand and supply are finely balanced across its footprint. The Energy Information Administration notes that most balancing authorities are electric utilities that have taken on the responsibility for a specific portion of the system, and that they are connected to one another by metered high-voltage tie lines.
The Eastern Interconnection contains 36, the Western Interconnection 37, and ERCOT exactly one.
Why the dictionary version is insufficient
General usage treats the balancing authority as an administrative region. It is an operational role with a physical consequence: if demand and supply fall out of balance within a footprint, local or wide-area blackouts follow. The role is defined by what it does second by second rather than by the territory it covers.
Why it matters for capacity
For an industrial siting decision, the balancing authority is the unit that matters. It determines who studies a load request, what upgrades are required, how cost is allocated and how long the process takes. National figures for queue duration or reserve margin average across systems that share none of those things.
Related terms
Interconnection · Regional transmission organization · Planning reserve margin
Appears in
What Is the Electric Grid?
How Electricity Demand Is Measured