In accordance with the European
Commission Regulation establishing guidelines for electricity balancing, the
National Energy Regulatory Council (NERC) approved the common settlement rules prepared by Litgrid AB together
with the transmission system operators (TSOs) of other countries for all
asynchronously connected TSOs, which will be applied to energy exchange between
different synchronous regions in order to maintain the same frequency and limit
its fluctuation. These rules will ensure clear and non-discriminatory
settlement conditions between TSOs.
The approved procedure shall govern
how and at what price the settlement for energy takes place between
asynchronously connected TSOs for the exchange of energy, i.e. energy volume
that results from frequency fluctuations. Synchronous area means an area with a
common system frequency in which synchronous interconnected TSOs operate, e.g.
as a separate zone of the synchronous areas of continental Europe and Northern
Europe, is the energy systems of Lithuania, Latvia, and Estonia, together
called the Baltic zone, which is part of the larger energy system IPS/UPS
(which includes Russia and other post-Soviet countries) synchronous area. In
the case of Lithuania, these rules will apply only to energy exchanges between
Lithuania and Sweden and between the electricity transmission systems of
Lithuania and Poland, since the Lithuanian zone belongs to a synchronous area
other than the latter.
For further information on NERC`s decision of
18/06/2020 see here.