Brief project description
The overhead line (OHL) 220 kV Trebinje - Perućica has been operating for a long time, exceeding the expected lifetime of the transmission lines. The line route passes through the region with demanding/difficult climatic factors. The nominal current of the line (720 A) is too low to support the construction of new generation capacities (from renewable sources, primarily solar, but also hydro potential).
Considering the requirements for the connection of renewable sources in Montenegro and Bosnia and Herzegovina, the capacity of the existing conductor and its age and operating conditions, it is necessary to carry out its reconstruction. The reconstruction, primarily due to insufficient capacity, would have to include the complete replacement of conductors, protection rope, insulation, suspension and connecting equipment. Since it is not possible to install classic conductors (ACSR) of higher capacity on the existing poles, due to their construction characteristics, this implies the replacement of the existing conductors and the installation of special ones (High Temperature Low Sag – HTLS), which have much higher nominal current and can carry 1500 A. Regarding mechanical characteristics, these conductors will not increase the load on the poles in relation to the load for which the poles were designed, so the existing poles may stay in place, saving financial resources compared with constructing a completely new line.
Expected benefits:
- resolving existing congestions between Bosnia and Herzegovina (BA) and Montenegro (ME);
- enabling and supporting the integration of a large number of RES in BA (the region of East Herzegovina) and Montenegro (the southeast region);
- increasing the Net Transfer Capacity (NTC) of cross-border lines between BA and ME in both directions;
- further developing and integrating the electricity market in the region;
- security of supply;
- elimination of observed insecurities in the past period;