The teams at the corporation have prepared the facilities under their management so that the fall and winter of 2022–2023 in Bulgaria will see the trouble-free and secure functioning of the power transmission system. This year, the corporation spent more than BGN 200 million, putting the projects outlined in the investment and maintenance programmes into action.
The 110 kV Varna North – Kavarna power line and the new 110 kV overhead line connecting the brand-new 110 kV substation Obzor was finished in 2022. The installation of a new 110 kV overhead line is scheduled to link the 400 kV Metalurgichna” and 110 kV Kurilo substations, which is necessary to guarantee the city of Sofia’s continuous and safe energy supply.
Over 10,000 decares of overhead line clearance were completed to prepare the power transmission facilities for the autumn-winter season 2022–2023, including the reconstruction of 148 km of 110 kV overhead lines. A power line bypass was constructed at a distance of around 30,000 kilometres. It was done to restrict 71 substations completely.
At the Plovdiv, Ikhtiman, Devnya 1, and Kavarna substations, the open 110 kV switchgear was rebuilt. The available 110 kV switchgear at Hisarya, Lazur, Lovech, Lukovit and other substations is still being modernised. Lightning protection cables totalling more than 500 kilometres have been changed. There are vehicles and off-road gear available.
Lightning protection cables totalling more than 500 kilometres have been changed. There are vehicles and off-road gear available. The nation’s substations now have automatic control systems thanks to significant advancements achieved by the electric transmission operator. Over 150 substations are already managed from five operational support points.
Another 35 substations will move to remote control by the year’s end, and another 75 substations’ management will be automated over the following two years.
Over 5,000 kilometres of an optical network created by ESO are constantly being added. There are 294 locations total in this network, including 223 ESO substations, 30 ESO administrative facilities, and 41 sites for manufacturers and large industrial customers.