Transmission Lines

PROJECTS IN CROATIA

1. Construction of the connecting TL 2x110 kV from the Sisak thermal power plant to the connection to the existing TL 220 kV Mraclin – Prijedor
Investor: Hrvatski operator prijenosnog sustava d.o.o.
Project description: connecting TL 2x220 kV – construction, route length 15.7 km, number of new steel lattice towers 47, tower weight 448,531 kg, TL Mraclin – Prijedor (51-62A, 63A-74) conductor replacement, route length 7.75 km, TL 220 kV Međurić – Sisak thermal power plant – reconstruction, route length 1.5 km, number of new towers 1. Tower weight 9,850 kg

2. Revitalization of TL 110 kV Slavonski Brod – ETS Andrijevci
Investor: Hrvatski operator prijenosnog sustava d.o.o., Zagreb
Project description: Dismantling works, dismantling 3x conductors + protective lines 19.6 km, demolition of concrete towers 63 pcs, construction. Number of new steel lattice towers 62 pcs, weight of towers 290,056 kg, El. installation works: 2x3 conductors 19.62 km, 1x3 conductor 1.43 km, OPGW – 20.2 km.



3. Reconstruction of TL 110 kV Delnice - Moravice
Investor: Hrvatski operator prijenosnog sustava d.o.o., Zagreb, in the Rijeka Transmission Area
Project description: Dismantling works: dismantling 3x conductors + 2x protective lines 9.2 km, demolition of concrete towers 87 pcs, steel lattice towers 6 pcs Construction: number of new steel lattice towers 93 pcs, weight of towers 325,720 kg, el. installation works: 2x3 conductors 4.82 km, 1x3 conductor 0.86 km, OPGW – 15.44 km.

4. Revitalization of TL 110 kV Đakovo – ETS Andrijevci
Investor: Hrvatski operator prijenosnog sustava d.o.o., Zagreb
Project description: Dismantling works: dismantling 3x conductors+1x protective lines 14.8 km, demolition of concrete towers 44 pcs, steel lattice towers 4 pcs. Construction: Number of new steel lattice towers 48 pcs, weight of towers 241,240 kg, El. installation works: 1x3 conductors 19.20 km, OPGW – 24.5 km

International

1. 400 kV Snösätra – Ekudden
Investor: Svenska Kraftnät (Sweden)
Project description: The goal of this project was to dismantle the existing 220 kV line and build a new 400 kV line in the same corridor. The location of the project further complicated the logistical preparation and execution of the works, given that the transmission line is located in the Stockholm area. The works began in August 2019, with the construction of access roads and foundations that were built under the live lines. The new line consists of 33 steel lattice towers with a total weight of around 1,300 tons. The length of the new line is 10 kilometres. This is mostly a double line, so laying the line was more demanding than usual. If we look at the price per KM, it is one of the most expensive transmission lines in Sweden.

2. 420 kV Sauda – Lyse
Investor: Statnett (Norway)
Project description: The project includes the construction of 83 kilometres of a new 420 kV line, six kilometres of a new 300 kV line, dismantling of 56 kilometres of the existing 300 kV line and replacement of OPGW on existing lines with a total length of 12 kilometres. The total weight of the new steel lattice structure on the project is almost 5000 tons, while 2000 tons of the existing structure was dismantled.


3. 2X130 kV Tovåsen-Bodmyran

Investor: Ellevio AB (Sweden)
Project description: Construction of a double 130 kV transmission line on steel lattice towers between the Tovasen and Bodmyran substations with a total length of 12 kilometres. Part of the project includes the demolition of a parallel line on wooden towers of the same length and the reconstruction of the 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, announced a tender for a turnkey project for the construction of three new 132 kV transmission lines. The length of the first line is 11.4 kilometres and includes 58 towers, the second line is half the length at 37 towers, while the last one is 4 kilometres long at 20 towers. Since it was a turnkey project, Dalekovod Projekt was also hired to do the entire design, and then Dalekovod d.d. started the construction.