REN - Redes Energéticas Nacionais, SGPS, S.A. (formerly Rede Eléctrica Nacional S.A.) is a Portuguese

Portugal

Portugal , officially the Portuguese Republic is a country situated in southwestern Europe on the Iberian Peninsula. Portugal is the westernmost country of Europe, and is bordered by the Atlantic Ocean to the West and South and by Spain to the North and East. The Atlantic archipelagos of the...

 company. Its main activities are global management of the country's Public Electricity Supply System (PESS), with the aim of guaranteeing the stability and security of electricity supply; operation and development of the national very-high voltage transmission grid

Electric power transmission

Electric-power transmission is the bulk transfer of electrical energy, from generating power plants to Electrical substations located near demand centers...

 in mainland Portugal; management of the portfolio of sites for power stations; and invitation of public tenders for the construction and operation of new power generating plants.

The company is also involved with the storage and transportation of liquefied natural gas

Liquefied natural gas

Liquefied natural gas or LNG is natural gas that has been converted temporarily to liquid form for ease of storage or transport....

, and owns and operates an LNG regasification terminal located at Sines

Port of Sines

The Port of Sines is an open deep-water sea port with excellent maritime access, with no restrictions, leading the Portuguese port sector in the volume of cargo handled, and offering unique natural characteristics able to receive any type of vessels...

.