SS Lastva – Modernization of the power grid through a variable shunt reactor

As part of the strategic development of the electric power infrastructure of Montenegro and the region of Southeast Europe, the project of installing a Variable Shunt Reactor (VSR) in the substation TS 400/110/35 kV Lastva aims to stabilize the voltage and increase the efficiency of electricity transmission.

Shunt reactors are used to manage excess reactive power in the transmission network, and the variable shunt reactor allows for more flexible and precise tuning, which is especially important in dynamic grid conditions and at high transmission capacities, as is the case with the submarine HVDC cable between Montenegro and Italy.

This cable, with a capacity of 1,200 MW, is the first step towards strengthening the region's energy integration with the EU market. In order to enable its full utilization, it is necessary to strengthen the Montenegrin transmission network internally. The project in SS Lastva enables exactly that, through the installation of a 250 MVAr VSR unit and the expansion of a 400 kV plant (GIS design, one bay), with integration into the existing system on a turnkey basis.

In addition to energy stability, this project contributes to greater system reliability, optimization of energy flows and opening up the market for cross-border electricity trade, making Montenegro an important energy crossroads in the region.

Company XEnergy d.o.o. is engaged in the execution of all construction works within the project, including preparatory, concrete and assembly works on the substation of TS Lastva, thus contributing to the implementation of one of the most important electric power projects in the country.