Baltic states add third interconnection
A third Estonia-Latvia interconnection makes it possible to maintain secure and stable operation of the Baltic electricity systems.
Image source: T&D World
Latvia, Riga: A third Estonia-Latvia interconnection makes it possible to maintain secure and stable operation of the Baltic electricity systems.
The idea of these interconnections is to desynchronize the Baltic power systems completely from Russia and Belarus by the end of 2025. They will start synchronous operation with the continental European networks through the alternating-current interconnections between Lithuania and Poland, while providing trade transactions through the direct-current interconnections with Finland, Sweden and Poland.
The first two transmission lines connect Valmiera, Latvia, to Tartu and Tsirguliina, Estonia, respectively. Although both connections are located within less than 160 km 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.
It was decided that the third Estonia-Latvia overhead line interconnection would be the route between the Kilingi-Nōmme substation in Estonia and the Riga CHP-2 substation in Latvia. This selected route had lower construction costs and, more importantly, the most substantial increase in cross-border load-transfer capacity (that is, 500/600 MW in both directions).
The new interconnection has increased the transmission capacity of the current Estonia-Latvia cross-border by at least 600 MW.
Source: T&D World
#electricity supply#energy independence#Estonia#interconnection#Latvia#transmission lines