Revised Weekly Constraints Update

Affected Period



Run type

20/05/2020 16:40

Last Updated
20/05/2020 16:40

EirGrid and SONI have published a revised weekly constraints update for Week 21.

The revision includes an update to the 400kV Network transmission constraint group limit (S_NBMIN_MP_NB): There must be at least one unit on load when Ireland wind is less than 1,000 MW. This is required to support voltage in the West and the 400 kV network.

In addition, the value for ‘Maximum Moyle Export’ has been increased from 380 MW to 400 MW.

The weekly constraints update is published every Friday evening on the TSO Responsibilities page of