SEMO Slides Meeting 39 - SEMO Home

Mod_18_10_v2 : SEM Intra-Day Trading
6 December 2011
Why Intra-Day Trading?
The EU is moving towards greater integration of electricity market
arrangements, particularly to facilitate greater trading across Europe.
EU Congestion Management Guidelines require re-allocation of unused
Interconnector capacity on both D-1 and D.
Ireland Infringement Letter - June 2010
 Continuing infringement cases against Ireland for violating Electricity Regulations.
 Key concerns are:
1) no intra-day congestion management mechanism at all interconnections
2) no common co-ordinated congestion management method
SEM Committee Decision (SEM-10_011)
 RAs to develop a Modification to facilitate intra-day trading
 RAs to set up a Working Group to discuss proposal and alternatives
 RAs to bring a proposed Modification (agreed by the Modifications Committee) to the
SEM Committee.
Development of the IDT High Level Design
Intra-Day Trading Modification Mod_18_10 raised March 2010:
Phase 1 (development and approval of High Level Design)
 Working Groups 1 to 7: development of High Level Design.
 25 Nov 2010 - Modifications Committee Meeting 32 – Modifications Committee
recommended to approve High Level Design.
 02 Mar 2011 - SEM Committee approved implementation of High Level Design.
 01 Feb 2011 - Modifications Committee Meeting 33 – SEMO asked to develop legal
text based on High Level Design.
Development of IDT Legal Drafting
Phase 2 (development of detailed Code changes to deliver HL Design)
The legal text has been developed and considered by the IDT Working Group on an
incremental basis, in three “Functional Groups”:
Functional Group 1 – Registration and Participant Submissions.
Functional Group 2 – Other Data Transactions and MSP Software.
Functional Group 3 – Settlement and Credit Risk Management.
 Working Group schedule:
10 May 2011,
Working Group 8:
Functional Group 1
29 June 2011,
Working Group 9:
Functional Group 3
27 September 2011,
Working Group 10:
Functional Group 2
10 November 2011,
Working Group 11:
Entire “final” Mod
In addition, eight conference calls have been held as part of the Working Group
IDT Legal Drafting and Plain English Documents
Mod_18_10 v2 combines all of the proposed IDT changes for FG1 +
FG2 + FG3:
 All FG1 changes are highlighted in yellow, and changed marked.
 All FG2 are change marked, but are not highlighted.
 All FG3 changes are highlighted in cyan, and changed marked.
Note: all highlighting is not part of the legal drafting changes and will be removed.
A series of “Plain English Documents” accompanies the legal drafting of
the IDT Modification:
 Separate PEDs for each of: FG1, FG2 and FG3.
 Additional PED for Transitional Provisions (see Mod_34_11).
 These are designed to facilitate the understanding of the legal drafting changes to the
Participant/Regulatory Authority Comment Summary
FG1 Review (following WG8) - 80 comments addressed
 Topics including: typos/drafting suggestions; Gate Windows/Trading Windows;
registration processes; query processes; and definitions.
FG1+FG3 Review (following WG9) - 125 comments addressed
 Topics including: typos/drafting suggestions; calculation of credit exposure/exclusion of
PQ Pairs; issue of Notices; calculation of EEP/ECP; and definitions.
FG1+FG2+FG3 Review (following WG10) - 100 comments addressed
 Topics including: typos/drafting suggestions; credit cover calculations;
publication/reporting timings; MSP Software Run Cancellation impacts; responses to
WG10 actions; and definitions.
Entire Modification Review (following WG11) - 8 comments addressed
 Topics including: COD for Interconnector Unit in WD1 Ending Overlap Optimisation
Period; SEMO manual publication processes; and MSP Software Run Cancellation
Summary of SEM Intra-Day Trading Design
Summary of the SEM Intra-Day Trading Design
The SEM Intra-Day Trading design is detailed in the High Level Design:
 Bidding to multiple Gate Windows (EA1, EA2 and WD1) for the relevant Trading Day.
 Restriction of Interconnector Unit bidding in the EA1 Gate Window to Capacity Holders.
 Reallocation of unused Interconnector Capacity to any Interconnector Unit (with no
requirement to be a Capacity Holder) in EA2 and WD1 MSP Software Runs.
 Trading Window for EA1/EA2 is the entire Trading Day and for WD1 is the second
portion of the Trading Day
 Fixing of Interconnector Unit capacity allocations from EA1 MSP Software Run (MIUNs)
in the EA2 and WD1 MSP Software Runs.
 Fixing of Interconnector Unit capacity allocations from EA1 MSP Software Run (MIUNs)
in the EA2 and WD1 MSP Software Runs.
 Limiting total Interconnector Unit Nominations in EA2 and WD1 by the Available
Transfer Capacity.
 MSP Software Cancellation to occur when certain conditions are met. If this occurs,
COD and TOD will continue to be used in subsequent MSP Software Runs.
 Changes to Credit Cover arrangements in respect of Interconnector Units.
SEM Intra-Day Trading Design:
Three Gate Windows / Trading Windows
Trading Day - 1
Trading Day
EA1 Trading Window
Only Interconnector Users with
Capacity Holdings can submit COD
Gate Window
e.g. as per current
EA1 Interconnector
Unit trades fixed
Gate Window
EA2 Trading Window
Ending Overlap
Opt’n Period
EA1 and EA2
Interconnector Unit
trades fixed
Start Overlap
Opt’n Period
Ending Overlap
Opt’n Period
WD1 Trading
Ending Overlap
Opt’n Period
10:00 TD-29 to 09:30 TD-1
09:30 TD-1 to 11:30 TD-1
11:30 TD-1 to 08:00 TD
Note: Settlement will continue to be Ex-Post,
based on Dispatch and Generator Unit
performance against Dispatch. No changes are
proposed to settlement payments or charges.
SEM Intra-Day Trading Design:
Summary of EA1, EA2 and WD1 MSP Software Runs
Load/Wind Forecasts
EA1 TOD (Forecast Availability etc)
EA1 Registration Data & Other TOD
EA1 VTOD set
WD1 (TD-1) Initial Conditions
Load/Wind Forecasts
EA2 TOD (Forecast Availability etc)
EA1 Registration Data & Other TOD
EA2 VTOD set
WD1 (TD-1) Initial Conditions
Optimisation Time Horizon 06:00 – 11:30
Trading Window 06:00 – 05:30
Optimisation Time Horizon 06:00 – 11:30
Trading Window 06:00 – 05:30
Load/Wind Forecasts
WD1 TOD (Forecast Availability etc)
EA1 Registration Data & Other TOD
EA2 VTOD set
EA2 Initial Conditions
Optimisation Time Horizon 06:00 – 11:30
Trading Window 18:00 – 05:30
Starting Gate Window Data
For EA1, Default Data
For EA2, latest Accepted at EA1 Gate Window Closure
For WD1, latest Accepted at EA2 Gate Window Closure
SEM Intra-Day Trading Design:
Contingency Data and MSP Software Cancellation rules
As Intra-Day timescales are compressed, contingency rules have been
developed to allow timelines to be met:
 Load Forecast / Wind Forecast / ATC – use latest data received.
 Active Capacity Holdings (EA1 only) – email and fax from IA (ACHS to be sent as early
as possible to IA and from IA to MO).
 MIUNs – MIUNs from previous run for the same period, else IUNs from previous run
for the same period, else zero.
MSP Software Run Cancellation:
 EA1, EP1 and EP2 MSP Software Runs will not be cancelled (paragraph 4.82D).
 EA2 MSP Software Runs will be cancelled if any of the conditions in paragraph 4.82E
are satisfied.
 WD1 MSP Software Runs will be cancelled if any of the conditions in paragraph 4.82F
are satisfied.
SEM Intra-Day Design:
Elements of Credit Exposure Calculation
Credit exposure will in future be a comprised of:
Amounts invoiced and payment outstanding (netted)
Amounts calculated but not yet invoiced (netted)
For Interconnector Units only, amounts calculated based on traded values
where Initial Settlement has not occurred (Energy or Capacity), based on
export MIUNs and PQ Pairs Accepted.
For Interconnector Units only, the maximum export exposure is implied by
a set of Price Quantity Pairs submitted to a particular Gate Window.
After each Gate Window Closure and MSP Software Run, the Available
Credit Cover will be calculated for each Participant:
 Sufficiency checks to be carried out after each Gate Window Closure, for
Interconnector Users.
 If sufficient Available Credit Cover, Offered Modified PQ Pairs = Accepted PQ Pairs.
 If insufficient Available Credit Cover, Offered Modified PQ Pairs will exclude or amend
Accepted PQ Pairs in order to ensure adequate credit cover is in place to cover
possibly trading exposure.
SEM Intra-Day Design:
Publication of Market Schedules and Market Prices
The Working Group process included discussion of the scenario where
the Market Schedule and SMPs can be calculated, but that the “Central
Market System reporting function is not operable”.
Following Participant comment, SEMO will be developing a business
process which will:
 enable Market Schedules/Prices/MIUNs to be provided to Participants by other means
 define a cut-off time at which time the business process will be enacted (3pm has been
suggested by Participants).
Once the business process is developed, SEMO will raise a Modification
Proposal that will seek to include relevant obligations within an Agreed
Procedure (AP7?).
Legal Review of IDT Drafting
Legal Review - Objectives
Legal review initiated by Modifications Committee (Sept 2011).
McCann Fitzgerald appointed to undertake the legal review.
The objectives of the legal review were to:
 review the drafting changes proposed for SEM Intra-Day Trading;
 identify any issues with the drafting where it is not legally robust, or where there are
inconsistencies, and propose changes to address;
 agree with SEMO the drafting changes that are required to address the issues
identified by the legal review and confirm that these have been correctly completed,
such that the revised drafting is legally robust; and
 draft a report to the Modifications Committee and Regulatory Authorities, detailing the
outcome of the legal review and confirming that the issues raised have been
addressed in the updated legal drafting, thereby giving the Committee sufficient
assurance that the Modification is legally robust.
Legal Review - Opinion
The Legal Review Report is included in Mod_18_10_v2 and was
separately published to the SEMO website on 23 November 2011.
Section 1.2
“On the basis of the scope of work as described below, under the assumptions and
subject to the qualifications and reservations set out in Schedule 1 hereto, and to
any matters or documents not described to us, we are satisfied that the final form
of the legal drafting for the Intra-Day Trading Modification proposal effectively and
accurately reflects and implements the proposal”.
Section 5.3
“As opined at Section 1, we are satisfied that the final form of the legal drafting for
the Intra Day Trading effectively and accurately reflects the proposal therefore, as
set out in the PEDs. We also note that no material concerns were raised in the
course of our review, which (as described above) was an iterative process in
relation to a large number of drafting comments and not a negotiation in relation to
net material aspects”.
Discussion and Vote

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