Interconnector Under Test
Update to TSC Modifications
Committee
5th December 2012
Background
• Mod 10 11 raised on 22nd March 2011
• Testing Tariffs to apply for Commissioning, Grid Code Compliance or
otherwise
• Meeting 35
• Deferred pending a SEMO Impact Assessment
• Meeting 36
• 3 Options presented
• Option 1 was Recommended for Approval
• RA Approval
– Letter issued 21st July 2011
Mod 10 11 Implementation Options
FRR dated 28 June 2011 set out the implementation options:
• Option 1 - Market require a facility to designate an Interconnector as
Under Test in settlement for a range of trading dates.
• Option 2 - Restriction for submitting bids (definition for a range
of testing dates in MPI)
• Option 3 –Inclusion of an Interconnector Unit test profile. This
relates to an agreed testing profile between the IA and the SO.
SEMO Assessment Summary
Option Description
Incremental
Cost
Total Cost
€59.2k
€59.2k
1
Application of Testing
Charges to I/C for a range
of dates
2
Restriction for submitting €205k
bids (definition for a range
of testing dates in MPI)
€264.2k
3
Inclusion of Testing Profile €309.3k
in Instruction Profiler
€573.5k
Modifications Committee Views
• The Committee agreed that Option 1 should be
pursued due to the timelines for Intraday Release
and EWIC deployment.
• A full solution including Options 1, 2 and 3 was
preferable due to uninstructed imbalances arising
while under test and restricted bidding.
• In the FRR, the SOs stated that a Modification to
Appendix E would be required for Option 3 to be
implemented and the SOs would consider raising this
Modification in due course.
Mod 10 11 Implementation
• Mod 10 11 (Option 1) implementation date in the
CMS was November 2012 release
• Mod 33 11 allowed SEMO to perform
workaround to manually apply the Testing Tariffs
as per Option 1 from the date of EWIC
Commissioning (i.e. July 2012)
• The T&SC was updated to allow Interconnectors
Under Test with an effective date for July 2012.
Issues with Option 1
• Not appropriate for Operational Interconnectors
– i.e. Not suitable for Interconnector which goes on/off test
• No ability to block bids and offers
– Interconnector participants can submit bids/offers even if Interconnector is
under test
• No provision available for test profiles
– RA approval required to set DOG and PUG to zero as Interconnector would
be unfairly penalised
Cost of Options 2 and 3 to implement
– New vendor quote received for revised design for Options 2 and 3 is now
€307k compared with €504k
– Investigated alternate approach
TSOs Recommendation
• Set ATC to zero when an Interconnector is
testing
– IUN/MIUNs will be zero for Interconnector Users and their bids will not be
taken into consideration
– DOG and PUG will need to be set to zero on an annual basis i.e. TSOs will
recommend through annual consultation process for RA approval
– Can be implemented immediately
• No further modification to the T&SC is therefore
recommended in respect of Interconnector
Under Test
• Thank You