Augstsprieguma Tīkls AS (AST) is an independent electricity transmission state system operator in Latvia. It operates power systems with voltages of 110 kV and above, which is leased from Latvenergo. It is also the main shareholder of Conexus Baltic Grid, a unified natural gas transmission and storage operator in Latvia.
History
On 15 October 1939 the Ķegums power plant and the first substation in Riga start operation. This day is considered as the beginning of AST.
AST was a part of Latvenergo. On 2 January 2012, it was unbundled from Latvenergo and the Ministry of Finance of Latvia became the sole shareholder of AST.[1]
In December 2017, AST bought from Uniper Ruhrgas International and Itera Latvija 18.31% and 16.05% stakes in Conexus Baltic Grid, a natural gas transmission system operator in Latvia, for €57.394 million.[2]