Letter: A

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Ancillary services

Essential functions that keep the grid running reliably and securely by maintaining frequency, voltage, and power load within certain limits. These services are procured from market participants to manage real-time fluctuations in supply and demand, as well as unexpected outages.

Amp

The unit of measurement for the flow, or current, of electricity through a conductor. One amp equals 0.001 kilowatts per hour (kWh).

Alberta Electric System Operator (AESO)

An Independent System Operator (ISO) responsible for managing the power grid and wholesale electricity market in the Canadian province of Alberta.

Aeroderivative (AERO)

Smaller and lighter than industrial gas turbines, these engines leverages advanced engineering and specialized metallurgy from the aviation industry.