Technology beginning with T

Smart Grid Technology
Click one of the letters above to go to the page of all terms beginning with that letter.
Tamper Detection

A feature supported by smart meters and meter data management systems to detect attempts to inhibit proper meter operation or load monitoring. This can include detection of physical tampering with the meter, or detection of meter data anomalies that may indicate tampering.

Telemetering

The process by which measurable electrical quantities from substations and generating stations are instantaneously transmitted to the control center, and by which operating commands from the control center are transmitted to the substations and generating stations.

Thermal Overload Monitoring

Technology including sensors, information processors, and communications that can detect and report instances where equipment operating temperatures exceed preset limits. This is important since temperature is one of the primary factors in determining the power handling capacity of equipment.

Thermal Rating

The maximum amount of electrical current that a transmission line or electrical facility can conduct over a specified time period before it sustains permanent damage by overheating or before it sags to the point that it violates public safety requirements.

Tie Line

A circuit connecting two Balancing Authority Areas.

Tie Line Bias

A mode of Automatic Generation Control that allows the Balancing Authority to maintain its Interchange Schedule and respond to Interconnection frequency error.

Time Error

The difference between the Interconnection time measured at the Balancing Authority(ies) and the time specified by the National Institute of Standards and Technology. Time error is caused by the accumulation of Frequency Error over a given period.

Time Error Correction

An offset to the Interconnection's scheduled frequency to return the Interconnection's Time Error to a predetermined value.

Time-Based Rate Program

A type of electricity rate where rates vary for different days, times of day, or events (e.g. days with extremely high loads). Various types of customer systems facilitate implementation of these pricing programs. These include smart meters, controls, and communications systems and software, providing two-way information between utilities and customers. Such systems may control customer load, or provide rate information to customers to alter their electricity consumption behavior.

Time-of-use Pricing

Time-of-use pricing (TOU) typically applies to usage over broad blocks of hours (e.g., on-peak=6 hours for summer weekday afternoon; off-peak= all other hours in the summer months) where the price for each period is predetermined and constant.

Tlr Log

Report required to be filed after every TLR Level 2 or higher in a specified format. The NERC IDC prepares the report for review by the issuing Reliability Coordinator. After approval by the issuing Reliability Coordinator, the report is electronically filed in a public area of the NERC Web site.

Total Transfer Capability

The amount of electric power that can be moved or transferred reliably from one area to another area of the interconnected transmission systems by way of all transmission lines (or paths) between those areas under specified system conditions.

Transfer Capability

The measure of the ability of interconnected electric systems to move or transfer power in a reliable manner from one area to another over all transmission lines (or paths) between those areas under specified system conditions. The units of transfer capability are in terms of electric power, generally expressed in megawatts (MW). The transfer capability from 'Area A' to 'Area B' is not generally equal to the transfer capability from 'Area B' to 'Area A.'

Transmission Angle and Frequency Monitoring

An advanced transmission application that uses angle and frequency measurements from PMUs to indicate loss of generation or other disturbances causing a change in the supply/demand balance.

Transmission Constraint

A limitation on one or more transmission elements that may be reached during normal or contingency system operations.

Transmission Customer

Any eligible customer (or its designated agent) that can or does execute a transmission service agreement or can or does receive transmission service., Any of the following responsible entities: Generator Owner, Load-Serving Entity, or Purchasing-Selling Entity.

Transmission Line

A system of structures, wires, insulators and associated hardware that carry electric energy from one point to another in an electric power system. Lines are operated at relatively high voltages varying from 69 kV up to 765 kV, and are capable of transmitting large quantities of electricity over long distances.

Transmission Line Monitoring System

Hardware, software, including sensors for voltage, current, temperature, mechanical load, wind speed, or other electrical or environmental parameters, including synchrophasors. These systems are designed to provide precise information that determine the operating conditions and ratings of transmission lines. Such a system can monitor line conditions and alert grid operators of trouble.

Transmission Operator

The entity responsible for the reliability of its 'local' transmission system, and that operates or directs the operations of the transmission facilities.

Transmission Owner

The entity that owns and maintains transmission facilities.

Transmission Planner

The entity that develops a long-term (generally one year and beyond) plan for the reliability (adequacy) of the interconnected bulk electric transmission systems within its portion of the Planning Authority Area.

Transmission Reliability

The amount of transmission transfer capability necessary to provide reasonable assurance that the interconnected transmission network will be secure. TRM accounts for the inherent uncertainty in system conditions and the need for operating flexibility to ensure reliable system operation as system conditions change.

Transmission Reliability Margin

The amount of transmission transfer capability necessary to provide reasonable assurance that the interconnected transmission network will be secure. TRM accounts for the inherent uncertainty in system conditions and the need for operating flexibility to ensure reliable system operation as system conditions change.

Transmission Service

Services provided to the Transmission Customer by the Transmission Service Provider to move energy from a Point of Receipt to a Point of Delivery.

Transmission Service Provider

The entity that administers the transmission tariff and provides Transmission Service to Transmission Customers under applicable transmission service agreements.

Transmission System Operator

An individual at a control center () whose responsibility it is to monitor and control that electric system in real time.

Two-Way Communications (High Bandwidth)

A two-way communications infrastructure that can network one or more parts of the smart grid via secure, high speed, high bandwidth connections. This infrastructure system serves as the backbone of the customer systems, AMI, distribution, and transmission smart grid systems.