Transelectrica boosts Serbia link to 1,000 MW — NRG-IA

On May 26, 2026, Transelectrica inaugurated the completed 400 kV Reșița transformer substation and the fully retrofitted 220/110 kV Reșița substation in Caraș-Severin County. The investment, valued at RON 175.9 million (excluding VAT), was funded entirely from the company's own resources, according to a company press release. The project includes the construction of a new 400 kV substation and the modernization of the existing 220/110 kV voltage levels. The works were executed by the Consortium of Siemens Energy SRL, Electrogrup SA, Retrasib SA, subcontractor Energotech, and Dacom Impex SRL, as part of the strategic project "Upgrading to 400 kV of the Porțile de Fier–Reșița–Timișoara–Săcălaz–Arad Axis / 400/220/110 kV Reșița Substation". The grid becomes the central focus of the transition The completion of the Reșița substation carries far greater significance than the inauguration of a local infrastructure asset. The substation integrates into the 400 kV power highway in the west of the country, the Banat Axis, ensuring electricity transit between Porțile de Fier, Reșița, Timișoara, and Arad. Transelectrica notes that other projects are concurrently underway to upgrade the Porțile de Fier – Reșița – Timișoara – Săcălaz – Arad axis to 400 kV. This region is critical for three simultaneous objectives: off-taking generation from existing capacities, integrating new producers (including renewables), and strengthening regional interconnection. In an energy system where solar and wind generation are expanding and new industrial consumption requires grid connection, the transmission grid becomes the infrastructure that ultimately dictates how much power can actually flow. Installed megawatts without adequate grid capacity remain partially trapped by congestion, curtailments, or higher balancing costs. The 400 kV Reșița substation addresses exactly this bottleneck: it does not generate power, but it increases the system's capacity to transport it to where it is needed. Romania–Serbia interconnection capacity rises to 1,000 MW One of the key technical outcomes of the project is the operationalization of both circuits of the 400 kV Reșița–Pancevo overhead transmission line (OHL). Transelectrica points to an increase of up to 1,000 MW in transmission capacity between Romania and Serbia, as well as the ability to off-take power from the Porțile de Fier substation at the 400 kV voltage level. This increase is highly significant for the regional market. Interconnections are not merely technical grid components, but vital market and energy security tools: they facilitate cross-border trade, mitigate the risk of regional isolation, and contribute to a more efficient management of imbalances between generation and consumption. The relationship with Serbia is particularly relevant for western Romania, where power flows depend on grid architecture, generation in the Porțile de Fier area, the connection of new capacities, and the evolution of regional trade. Even during its planning phase, Transelectrica presented the Reșița–Pancevo OHL as an investment aimed at increasing electricity exchanges between the Romanian and Serbian power systems. The Banat Axis integrates into the 400 kV architecture The Reșița substation is part of a broader development program for the 400 kV power highway in western Romania. Transelectrica notes that the investment is part of Phase I of the Banat Axis development and modernization program, supported in part by the Modernisation Fund, aiming to strengthen energy infrastructure in western Romania and its interconnection with the European ENTSO-E grid. In March 2026, two of Transelectrica's 400 kV line projects were declared projects of national importance, including the upgrade to 400 kV of the Porțile de Fier – Reșița – Timișoara – Săcălaz – Arad axis, and the 400 kV Timișoara – Arad OHL, Phase III. The Government justified this designation by citing its impact on security of supply in the Banat region, the reduction of grid losses, increased system stability, and the consolidation of the interconnection with Serbia. This sequence demonstrates that Reșița is not an isolated investment. It is a stepping stone in a larger architecture: western Romania is being gradually upgraded to a voltage level compatible with higher power flows, renewable integration, and more robust cross-border trade. New consumers and producers depend on grid capacity For the western region, Transelectrica points to completed or ongoing investments exceeding RON 600 million, which bolster system stability, security of supply, grid connection capacity for large consumers and producers, and trade with Serbia. The company also notes an investment budget of RON 914 million for 2026, up 30% year-on-year, alongside a progressive target of reaching up to RON 1.3 billion in annual investments. These figures must be viewed against the backdrop of a structural shift in the energy sector. Romania is seeing a growing pipeline of…