The Continental European (CE) Power System which comprises the synchronised transmission grids of 25 countries has been subject to occasional deviations from the 50Hz mid-frequency since late 2017. Each time the deviations originated from the Serbia, Macedonia, Montenegro (SMM) control block, specifically from the control areas of Kosovo and Serbia – an example of how a regional conflict in an interconnected system can have pan-European impacts. The European Network of Transmission System Operators for Electricity (ENTSO-E) has consistently undertaken efforts to find a political solution to the problem, and the CE transmission system operators (TSOs) have pledged their support in addition to the technical measures they are implementing anyway to limit the deviations.
Obviously, the problem is not only an issue for ENTSO-E and its members, but also of interest to the general public. It needs to be solved in order to keep the system consistently stable, to avoid further time deviations in electronically controlled watches, to limit financial effects, and ultimately to avoid a potential blackout in Europe. Considering the next winter period, this should happen in the short term. ENTSO-E is therefore in close and continuous exchange with the two responsible TSOs, EMS from Serbia and KOSTT from Kosovo, and has the task of facilitating a solution between the TSOs.
ENTSO-E’s Regional Group CE, which represents all transmission system operators of the 25 countries in the CE synchronous area, voted last week on a proposal to put an end to the deviations. The suggestion aims to provide a basis for a transitional solution and does not impose a principle on either of the two TSOs. ENTSO-E’s proposal was widely supported by the TSOs, although the work-in-progress version of the operational principles could not be approved. ENTSO-E continues its discussions with EMS and KOSTT.
The continental European TSOs support ENTSO-E in preventing further frequency deviations in the synchronised European power system (picture: photo composition using screenshots of Swissgrid’s frequency monitor and a press picture from Swissgrid)
> See ENTSO-E press release (html)