Glossary - r
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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Term/Acronym |
Definition |
| REC | Renewable Energy Credit |
| REP | Retail Electric Provider |
| RGS | Regulation Service |
| RMR | Reliability Must-Run |
| RPRS | Replacement Reserve Service |
| RRO | Responsive Reserve Obligation |
| RRS | Responsive Reserve Service |
| RT | Real Time |
| Reactive Power | The product of voltage and the out-of-phase component of alternating current. Reactive Power, usually measured in megavolt-amperes reactive, is produced by capacitors, overexcited generators and other capacitive devices and is absorbed by reactors, underexcited generators and other inductive devices. |
| Reactive Power Profile | See Voltage Profile |
| Reactive Reserve | That reactive capability required to meet sudden loss of generation, Load or transmission capacity and maintain voltage within desired limits. |
| Real Time | The current instant in time. |
| REC Program | The Renewable Energy Credit trading program, as described in Section 14, Renewable Energy Credit Trading Program, and PUCT Subst. R. 25.173. |
| Registered Market Participant | Entity that is registered with ERCOT to participate in the competitive market administered by ERCOT within the ERCOT Region. Registered Market Participants include those using statewide systems administered by ERCOT and may be non-ERCOT participants. |
| Registration Processing Period | Minimum amount of time the ERCOT registration system requires to process transactions. This period begins when ERCOT receives a registration transaction request and continues until the completion of the transaction. |
| Regulation Service | A service that is used to control the power output of Generation Resources in response to a change in system frequency so as to maintain the target system frequency within predetermined limits. |
| Reliability Must Run (RMR) Service | A Generation Resource unit operated under the terms of an annual Agreement with ERCOT that would not otherwise be operated except that they are necessary to provide voltage support, stability or management of localized transmission constraints under first contingency criteria where Market Solutions do not exist. |
| Remedial Action Plan | Predetermined operator actions to maintain ERCOT Transmission Grid reliability during a defined adverse operating condition. |
| Replacement Reserve Service | A service that is procured from Generation Resource units planned to be off-line and Load acting as a Resource that are available for interruption during the period of requirement. |
| Representative Interval Data Recorder | The technique for profiling premises participating in special pricing programs which consists of implementing a statistically representative Load research sample on the program population. The sample data is then used to develop the representative IDR (RIDR) for profiling these premises. |
| Resettlement Statement | See Settlement Statement |
| Resource | Facilities or Load capable of providing or reducing the need for electrical energy or providing Ancillary Services to the ERCOT System, as described in Section 6, Ancillary Services. This includes Generation Resources and Loads acting as Resources. |
| Resource Entity | A Market Participant that owns or controls a Resource. |
| Resource ID | A unique identifier assigned to each Resource used in the registration and settlements systems managed by ERCOT. |
| Resource Plan | A plan provided by a QSE to ERCOT indicating the forecast state of Generation Resources or individual Loads each acting as a Resource, including information on availability, limits and forecast generation or Load of each Resource. |
| Responsibility Transfer | The controlled and orderly transfer of eligible resources from one QSE to another in accordance with Section 4, Scheduling. |
| Responsive Reserve Service | Responsive Reserve consists of the daily operating reserves that are intended to help restore the frequency of the interconnected transmission system within the first few minutes of an event that causes a significant deviation from the standard frequency. |
| Retail Electric Provider | A person that sells electric energy to retail Customers in this state. As provided in PURA §31.002(17), a Retail Electric Provider may not own or operate generation assets. As provided in PURA §39.353(b), a Retail Electric Provider is not an Aggregator. |
| Revenue Quality Meter | For ERCOT Metered Entities, a meter that is in compliance with the Protocols and the Operating Guides. For TDSP Metered Entities, a meter that is in compliance with Local Regulatory Authority approved meter standards or the Protocols and the Operating Guides. |