Glossary - u
For your convenience, this page contains an alphabetically organized list of terms, definitions and common acronyms used in the electric utility industry.
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| N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Term/Acronym |
Definition |
| UFE | Unaccounted For Energy |
| URL | Unit Reactive Limit |
| USA | User Security Administrator |
| USD | United States Dollar or U.S. Dollar |
| USTR | Uninitiated Service Termination Request |
| Unaccounted for Energy (UFE) | The difference between total metered Load each Settlement Period, adjusted for applicable Distribution Losses and Transmission Losses, and total ERCOT System net generation. |
| Uncontrollable Renewable Resources | Generators that can only produce an amount of energy directly related to their supply of variable energy from their respective renewable resources, such as wind or solar. |
| Uninstructed Deviation | A condition occurring whenever the total metered resources of a QSE for a Settlement Interval are different from the total of the scheduled resources plus any Resource deployments instructed by ERCOT. |
| Uninstructed Factor | A factor used to reduce the total payments made to a Resource for Uninstructed Deviations. The Uninstructed Factor could change by interval, in accordance with Section 6.8.1.14.2, Determining the Uninstructed Factor. |
| Unit Reactive Limit (URL) | The maximum quantity of Reactive Power that a Generation Resource is capable of providing at a 0.95 power factor at its maximum real power capability. |
| Unusual Event | Specifics events, as defined in these Protocols Section 4, Scheduling, that allow ERCOT to deploy Balancing Energy Service outside of the normal deployment notification. |
| Updated Desired Base Point | A calculated MW value representing the expected MW output of a Generation Resource ramping to a Base Point. |
| Updated Network Model | A computerized representation of the ERCOT physical network topology, including some Resource Parameters, all of which replicates the forecasted or current network topology of the ERCOT System needed by ERCOT to perform its functions. |
| Uplift | The process of allocating costs to QSEs based on Loads and exports within the ERCOT Region. |
| Usage Profile | See Load Profile |