Autonomous Gas Units, storage systems (tanks) associated with isolated distribution networks or dedicated to large industrial clients, located in areas of the country where there is no natural gas transmission network and where the supply for the AGUs is carried out by tanker trucks.
Vegetable or animal organic matter that can be used as a source of energy
Block valve station
Facilities for underground storage of natural gas
Energy consumption in a given period of time
Energy consumed pumping water from one reservoir to another in a given period of time
Corrected for the effects of Temperature and number of Working Days
Custody transfer station
Household and industrial consumers, excluding combined-cycle power plants
Distribution Network Operator
Combined-cycle power plants that use natural gas as fuel for electricity generation
Period between 5 a.m. of a given day and 5 a.m. of the following day.
Pipeline system for natural gas transmission
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
High Pressure (relative to atmospheric pressure, higher than 20 bar)
High Voltage (between 45 kV and 110 kV)
Clients supplied at High Pressure
Ratio between the inflows to hydroelectric dams in a given period and the historical average inflows in the same period
Junction station with a single branch
Entry of natural gas into the underground storage
Transmission Network Element which crosses a border between neighbouring states to interconnect their respective networks
Difference between Imports and Exports, positive when importer and negative when exporter
Junction station
Liquefied Natural Gas – natural gas kept at a sufficiently low temperature to be liquid
Amount of natural gas in the pipeline at a given moment
Difference between energy input and energy output for a given period
LNG Terminal - Liquefied natural gas
Medium Voltage (between 1 kV and 45 kV)
A stable mixture of gases (hydrocarbons and inert gases) of fossil origin, of which methane is the main constituent (83% to 99%)
Energy consumed in the transmission system’s auxiliary services
Transfer of water from one reservoir to another at a higher level
Maximum power observed in a given period
Generation from water previously pumped into reservoirs
Hydroelectric dam with storage capacity
Hydroelectric dam with reduced storage capacity
Generation from natural resources (water, wind, sun, waves, biomass, urban waste)
National LNG Transmission, Storage Infrastructure and Terminals Network
National Transmission Network
National Gas Distribution Network
National Gas Transmission Network
Quantity of gas stored in a given facility
Ratio between solar energy generation in a given period and the average historical generation in the same period
National Natural Gas System
Generation of electricity from the Sun
Cryogenic trucks used to supply Autonomous Gas Units
Transmission System Operator
A set of caves that enable storing natural gas in gaseous form
Clients supplied at Very High Voltage
Very High Voltage (over 110 kV)
Electricity produced from wind;
Withdrawal of natural gas from the underground storage
Ratio between wind energy generation in a given period and the average historical generation in the same period
Repartição da produção por fonte primária – carvão, gás natural, água, vento, sol, ondas, biomassa e outros. Representa-se ainda a importação, caso exista.
A linha mais grossa representa o consumo de electricidade e a linha mais fina indica a soma deste com o consumo em bombagem (consumo das centrais hidroeléctricas reversíveis, utilizado para bombear água de um reservatório para outro mais elevado e que será turbinada posteriormente).
Caso a produção seja maior que o consumo, significa que se está a exportar electricidade, sendo a exportação a diferença entre a produção e o consumo.