System frequency deviation caused by political disagreement between Kosovo and Serbia is affecting the whole of continental Europe's power system and must stop immediately, transmission system association Entso-e said Tuesday.
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Since mid-January Europe's huge synchronized high voltage electricity network, stretching from Spain to Turkey and from Poland to Netherlands, has been experiencing system frequency deviation from the mean value of 50 Hertz, the association said.
The deviations originate from the Serbia, Macedonia and Montenegro block, specifically in Kosovo and Serbia, Entso-e spokeswoman Susanne Nies told S&P Global Platts.
Kosovo has been using more power than it produces while Serbia, responsible for balancing the Kosovo grid, has failed to do this, Nies said.
As a result, Serbia has been free-riding on the system.
Political disagreements between the Serbian and Kosovar authorities "have led to the observed electricity impact. If no solution can be found at political level, a deviation risk could remain," Entso-e said.
The average frequency since mid-January has been 49.996 Hertz, resulting in 113 GWh of missing energy.
"The question of who will compensate for this loss has to be answered," Entso-e said.
The decrease in frequency has caused a delay of close to six minutes in electric clocks, the association added.
It is exploring "all technical options" to address the deviation with the concerned TSOs, while calling on national governments to act on the political front.