Transmission Lines

PROJECTS IN CROATIA
1. Construction of the 2x110 kV Connection Transmission Line from TPP Sisak to the connection point on the existing 220 kV Transmission Line Mraclin – Prijedor
Investor: Croatian Transmission System Operator (HOPS d.o.o.)
Project Description: 2x220 kV connection transmission line – construction, route length 15.7 km, number of new steel-lattice towers: 47, tower weight: 448,531 kg; Mraclin – Prijedor Transmission Line (51-62A, 63A-74) – conductor replacement, route length 7.75 km; 220 kV Transmission Line Međurić – TPP Sisak – reconstruction, route length 1.5 km, number of new towers: 1, tower weight: 9,850 kg.

2. Revitalization of the 110 kV Transmission Line Slavonski Brod – ESS Andrijevci
Investor: Croatian Transmission System Operator (HOPS d.o.o.), Zagreb
Project Description: Dismantling works: removal of 3x conductors + earth wire (19.6 km), removal of 63 concrete poles.
Construction: 62 new steel-lattice towers, tower weight: 290,056 kg. Electrical assembly works: 2x3 conductors (19.62 km), 1x3 conductor (1.43 km), OPGW (20.2 km).

3. Reconstruction of the 110 kV Transmission Line Delnice – Moravice
Investor: Croatian Transmission System Operator (HOPS d.o.o.), Zagreb, Transmission Area Rijeka
Project Description: Dismantling works: removal of 3x conductors + 2x earth wires (9.2 km), removal of 87 concrete poles and 6 steel-lattice towers.
Construction: 93 new steel-lattice towers, tower weight: 325,720 kg. Electrical assembly works: 2x3 conductors (4.82 km), 1x3 conductor (0.86 km), OPGW (15.44 km).

4. Revitalization of the 110 kV Transmission Line Đakovo – ESS Andrijevci
Investor: Croatian Transmission System Operator (HOPS d.o.o.), Zagreb
Project Description: Dismantling works: removal of 3x conductors + 1x earth wire (14.8 km), removal of 44 concrete poles and 4 steel-lattice towers.
Construction: 48 new steel-lattice towers, tower weight: 241,240 kg. Electrical assembly works: 1x3 conductors (19.20 km), OPGW (24.5 km).

INTERNATIONAL PROJECTS
1. 400 kV Snösätra – Ekudden
Investor: Svenska Kraftnät (Sweden)
Project Description: The objective of this project was the dismantling of an existing 220 kV line and the construction of a new 400 kV line within the same corridor. The project location presented significant logistical challenges as the transmission line is situated within the Stockholm metropolitan area. Works commenced in August 2019 with the construction of access roads and foundations performed beneath energized lines. The new line consists of 33 steel-lattice towers with a total weight of approximately 1,300 tons. The route length is 10 kilometers, and as a double-circuit line for most of its length, the stringing process was more demanding than usual. The project was completed in October of this year. In terms of cost per kilometer, this ranks as one of the most expensive transmission lines in Sweden.

2. 420 kV Sauda – Lyse
Investor: Statnett (Norway)
Project Description: The project involves the construction of 83 kilometers of a new 420 kV line, six kilometers of a new 300 kV line, the dismantling of 56 kilometers of an existing 300 kV line, and the replacement of OPGW on 12 kilometers of existing lines. The total weight of the new steel-lattice structures for the project is nearly 5,000 tons, while 2,000 tons of existing structures were dismantled.

3. 2x130 kV Tovåsen – Bodmyran
Investor: Ellevio AB (Sweden)
Project Description: Construction of a double-circuit 130 kV transmission line on steel-lattice towers between the Tovåsen and Bodmyran substations, with a total length of 12 kilometers. The scope of the project also included the demolition of a parallel wooden pole line of the same length and the reconstruction of an old line north of the substation.

4. Dubblabergen–Stavaliden, Dubblabergen–Lillberget & Stavaliden–Björkmyran 150 kV transmission lines
Investor: Markbygden Net AB (Sweden) Project Description: Markbygden Net AB, a Swedish private investor, issued a "turnkey" tender for the construction of three new 132 kV transmission lines. The first line is 11.4 kilometers long with 58 towers, the second is half that length with 37 towers, and the final line spans 4 kilometers with 20 towers. As this was a turnkey project, Dalekovod-Projekt was engaged to provide the complete design, after which Dalekovod d.d. executed the construction works.