Imbalance netting is a real-time mutual exchange of imbalances of interconnected electricity systems. The exchange prevents the activation of secondary control ancillary services and supply of secondary control energy against each other respectively. It expands possibilities for exchange of cross-border balancing energy (that means energy needed for balancing imbalances between actual generation and electricity consumption) with European transmission system operators and thus increases the efficiency in managing control zones. Imbalances are exchanged via cross-border transmission capacities left after the gate closure time of cross-border intraday allocation. Thanks to that, cross-border capacity available to market participants is not diminished.
ČEPS participates in two projects:e-GCC
is cooperation launched in March 2012 between ČEPS and SEPS. In 2013, Hungarian TSO MAVIR joined, following the accession of Hungary into the Czech-Slovak project of day-ahead electricity market coupling. Within the e-GCC project, ČEPS is technical solution provider and development coordinator.IGCC
is cooperation of eleven TSOs from eight countries, launched in October 2011 by cooperation of German TSOs 50Hertz, Amprion, TenneT TSO, TransnetBW and Danish TSO Energinet.dk. Dutch TenneT joined in February 2012, followed by Swiss Swissgrid in March 2012. ČEPS joined the cooperation in June 2012 and was followed by Belgian Elia in October 2012 and Austrian APG in April 2014. French RTE joined the cooperation in February 2016. More information about the project you can find on websites here
The INC (Imbalance Netting Cooperation) Project between Austrian APG and Slovenian ELES is another example of cooperation using imbalance netting in the synchronised zone.