Letter A
Letter B

Biomass

Vegetable or animal organic matter that can be used as a source of energy

Letter C

Caves

Facilities for underground storage of natural gas

Chromatograph

Apparatus that allows measuring the quality of the gas transported in the network

Letter D

DNO

Distribution Network Operator

Letter E
Letter F
Letter G

Gas pipelines

Pipeline system for natural gas transmission

GRMS

Gas Reduction and Measurement Stations are infrastructures belonging to the National Natural Gas Transmission Network (RNTGN) that ensure the physical interconnection between it and the distribution networks or final clients connected directly to the High Pressure Network

Letter H

HV

High Voltage (between 45 kV and 110 kV)

Hydro capability factor

Ratio between the inflows to hydroelectric dams in a given period and the historical average inflows in the same period

Letter I

Interconnection

Transmission Network Element which crosses a border between neighbouring states to interconnect their respective networks

Importing trade balance

Difference between Imports and Exports, positive when importer and negative when exporter

Injection

Entry of natural gas into the underground storage

Letter J
Letter K
Letter L

LNG

Liquefied Natural Gas – natural gas kept at a sufficiently low temperature to be liquid

Letter M
Letter N

Natural Gas

A stable mixture of gases (hydrocarbons and inert gases) of fossil origin, of which methane is the main constituent (83% to 99%)

Letter O
Letter P

Peak

Maximum power observed in a given period

Letter Q
Letter R

Reservoir

Hydroelectric dam with storage capacity

Renewable

Generation from natural resources (water, wind, sun, waves, biomass, urban waste)

RNDG

National Gas Distribution Network

RNT

National Transmission Network

RNTG

National Gas Transmission Network

RNTIAT

National LNG Transmission, Storage Infrastructure and Terminals Network

Letter S

SNGN

National Natural Gas System

Solar

Generation of electricity from the Sun

Solar capability factor

Ratio between solar energy generation in a given period and the average historical generation in the same period

Letter T

TSO

Transmission System Operator

Letter U

Underground storage

A set of caves that enable storing natural gas in gaseous form

Letter V
Letter W

Wind power

Electricity produced from wind

Wind capability factor

Ratio between wind energy generation in a given period and the average historical generation in the same period

Letter X
Letter Y
Letter Z
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