The installation of a special HTLS conductor as part of the modernization of the 110 kV transmission line Podgorica 1 – Danilovgrad – Perućica will enable the Perućica hydropower plant (307 MW) to transmit up to 30% more energy into Montenegro’s power transmission system.
Project overview
Between February and April 2024, our teams successfully installed 105 kilometers of HTLS conductor, significantly increasing the capacity and stability of the national power grid. This advanced conductor—characterized by minimal elongation and high mechanical strength—ensures improved safety for surrounding structures and reduces transmission losses.
Technical characteristics
- Voltage level: 110 kV
- Total line length: 35 km
- Installed HTLS conductor length: 105 km
- Replacement of conventional conductors with HTLS conductors
- Complete replacement of insulator strings and overhead line fittings
- Reduction of energy losses and improved system reliability
Implementation challenges
- Replacing existing conductors on an aging transmission line while maintaining grid stability.
- Installing specialized HTLS components, including advanced suspension and tension clamps.
- Training line workers and the investor’s team to ensure proper future maintenance.
- Adjusting work processes due to the unique mechanical properties of carbon-core composite conductors.
- Achieving precise integration into the power system to maximize efficiency and stability.
Elnos Group’s role
As the leading contractor, Elnos Group was responsible for:
- Dismantling the old conductors and installing HTLS conductors
- Complete replacement of insulator assemblies and fittings
- Implementation of specialized HTLS suspension and tension accessories
- Training maintenance teams and the investor’s personnel
- Testing and commissioning of the upgraded transmission line
Strategic importance
- 30% increase in Montenegro’s transmission capacity
- Reduced transmission losses due to high-efficiency HTLS conductors
- Enhanced grid safety and resilience to severe weather conditions
- Long-term reduction of maintenance costs owing to the durability of HTLS technology
- Strengthening of national transmission infrastructure, enabling the integration of new renewable energy sources
The modernization of the 110 kV transmission line Podgorica 1 – Danilovgrad – Perućica represents a significant step toward improved energy efficiency and grid security in Montenegro. Through this project, Elnos Group is setting new regional standards in the implementation of advanced transmission technologies.
