Glossary - n
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 |
| NCI | Notice of Change of Information |
| NERC | North American Electric Reliability Corporation |
| NESC | National Electrical Safety Code |
| NIS | Nodal Implementation Surcharge |
| NIST | National Institute of Standards and Technology |
| NOIE | Non Opt-In Entity |
| NOMCR | Network Operations Model Change Request |
| Non-Spin | Non-Spinning Reserve |
| NSA | Network Security Analysis |
| NWSIDR | Non-Weather Sensitive IDR |
| Net Dependable Capability | The maximum sustained capability of a Resource as demonstrated by performance testing. |
| Net Generation | Gross generation less station auxiliary Load or other internal unit power requirements metered at or adjusted to the point of interconnection with the ERCOT Transmission Grid at the common switchyard. |
| Network Operations Model | A representation of the ERCOT System providing the complete physical network definition, characteristics, ratings, and operational limits of all elements of the ERCOT Transmission Grid and other information from TSPs, Resource Entities, and QSEs. |
| Network Security Analysis | A processor used by ERCOT to monitor Transmission Elements in the ERCOT Transmission Grid for limit violations and to verify Electrical Bus voltage limits to be within a percentage tolerance as outlined in the Operating Guides. |
| Non-Competitive Constraint | A Transmission Element that is not a Competitive Constraint. |
| Non-Metered Load | Load that is not required to be metered by applicable distribution or transmission tariff. |
| Non-Modeled Generator | See Resource |
| Non-Opt In Entity (NOIE) | An EC or MOU that does not offer Customer Choice. |
| Non-Opt-In Entity (NOIE) Load Zone | A Load Zone established by a NOIE or a group of NOIEs using a one-time NOIE election. |
| Non-Spinning Reserve Service (NSRS) | A service that is comprised of 30-Minute Non-Spinning Reserve Service (30MNSRS) and BES-Capable Non-Spinning Reserve Service (BESCNSRS).
A service that is provided through utilization of the portion of Off-line generation capacity capable of being synchronized and ramped to a specified output level within thirty (30) minutes (or Load that is capable of being interrupted within thirty (30) minutes) and that is capable of running (or being interrupted) at a specified output level for at least one (1) hour. 30MNSRS is not capable of participating in the Balancing Energy Services market because it does not meet all of the qualifications of providing Balancing Energy Service Up within fifteen (15) minutes. |
| Normal Ramp Rate | The rate of change in MW per minute of a Resource, which is specified by the QSE to ERCOT by up to ten segments; each segment represents a single MW per minute value (across the capacity of the Resource) that describe the available rate of change in output for the given range (between HSL and LSL) of output of a Resource. In Real-Time SCED Dispatch, the Normal Ramp Rate is telemetered by the QSE to ERCOT and represents the total capacity (in MW) that the Resource can change from its current actual generation within the next five minutes divided by five. |
| Normal Rating | See Rating |
| North American Electric Reliability Corporation | The national organization that is responsible for establishing standards and policies for reliable electric system operations and planning, or its successor. |
| Notice or Notification | The sending of information by an Entity to Market Participants, ERCOT, or others, as called for in these Protocols. Notice or Notification may be sent by electronic mail, facsimile transmission, or U.S. mail. |