ESTONIA, LATVIA - A third Estonia-Latvia interconnection makes it possible to maintain secure and stable operation of the Baltic electricity systems.

T&D World has announced that as the electricity supply routes and conditions have changed, the network's technical constraints must be addressed.

Four 330-kV interconnections exist between Latvia and Lithuania. However, two of the connections were built with Estonia back in the USSR days. The two transmission lines connect Valmiera, Latvia, to Tartu and Tsirguliina, Estonia, respectively. Although both connections are located within less than 100 miles from end to end, the current transmission lines have insufficient load-transfer capacity. New technical constraints and operational requirements for transmission lines in Latvia and Estonia created a need for a third transmission line interconnection.

Construction of the new transmission line began in early 2018. With a total length of 176 km (109 miles), the 330-kV transmission line consists of triple-bundled conductors per phase and a current-carrying capacity of 2000 A.

Source:  T&D World