In April 2021, SEPS and MAVIR, the TSOs for Slovakia and Hungary, commissioned three new 400 kV interconnectors. This restarted RES connecting to the Slovak power system. 

An online platform was established to publish available network and flexibility capacity, as well as the rules for allocating this capacity to SOs at the distribution and transmission levels. These rules and calculation methodologies, approved by the NRA, have evolved into their current form. 

SEPS currently calculates both capacities. Network capacity is allocated to  TSO, SEPS, and three DSOs based on the results of a network study. The network study is updated at least once every 3 years. Flexibility capacity is calculated for the entire system, with rules defining how and when SOs can request additional flexibility capacity from the “pool”. Flexibility capacity is reassessed every year. 

The current system has its limitations. It is practically impossible to connect large-scale RES generation. All published capacity is reserved by smaller applications at the DSO level. 

SEPS is preparing to roll out new network capacities designed to increase transparency and align with European standards. The new “hosting capacities” approach will replace the existing “network limit capacity” method.