Lithuanian energy infrastructure development and maintenance company Tetas, commissioned by Litgrid, has completed the design works for one of the main 330 kV overhead transmission lines between Lithuania and Latvia – the Aizkraukle–Panevėžys line.
Following the design stage, three construction permits were obtained. This project will enhance grid reliability, increase electricity transmission capacity between Lithuania and Latvia, and contribute to the expansion of renewable energy sources (RES).
“For the first time in the company’s history, we designed a project of such scale – an 80 km overhead line with 200 towers, some reaching as high as 70 meters,” said Agnė Gudaitienė, Head of the Design Department at Tetas.
“The Aizkraukle–Panevėžys line plays a key role in the development of renewable energy in northern Lithuania, where investors are planning new wind and solar parks. It is one of the four 330 kV interconnections with Latvia, and its reconstruction will not only increase capacity and ensure more reliable operation but also strengthen the region’s energy security,” Rokas Masiulis, CEO of Litgrid told The Voice of Renewables.
The 330 kV Aizkraukle–Panevėžys line was built and commissioned in 1969. The overhead line stretches 83 kilometers from the Panevėžys substation to the Latvian border. During reconstruction, all transmission towers will be replaced, along with conductors, ground wires, insulator strings, and line fittings. The current single-circuit towers and conductors will be upgraded to double-circuit towers, with one circuit equipped immediately and the option to connect a second circuit in the future.
