1. Project Nexus Workgroup
Reconciliation Meeting 6
Options for CSEP Reconciliation
24/04/2019

2. Background
Reconciliation Business Requirements Document states “aspiration for new reconciliation rules to apply to NDM CSEPs”
Preferred Shipper option is for a single Supply Point Register to hold CSEP meter point data and facilitate Meter Point Rec
Need to develop “Contingency Requirements” for SSP/LSP CSEP meter point rec, in case single SP Register is not achieved

3. Current CSEPs Reconciliation Arrangements
Larger Supply Points
Each LSP = 1 Logical Meter Number (LMN)
iGT holds meter assets and reads
iGT sends start and end dates and actual volumes
GT agent calculates Rec volume, Rec energy and Rec charges
Opposite entry passed to RbD
Smaller Supply Points
1 LMN per Shipper/CSEP project combination
CSEP SSP AQ included in RbD – ranks equally with direct connects for RbD charging

4. Options for Future CSEP SSP Rec
No Meter Point Rec for SSP on CSEPs – attract share of Reconciliation Neutrality A B
Reconciliation on AQ, for every AQ change
Aggregated Rec by SSP LMN – iGT Reads all meters in a CSEP on same day and submits total actual volume C D
Meter installed at every offtake – Reconciliation between GT and iGT E
Each SSP = 1 LMN – iGT submits dates and actual volumes F
Single Supply Point Register allows full Meter Point Rec

5. Option A
No Meter Point Rec for SSP on CSEPs – attract share of Reconciliation Neutrality only (in proportion to original allocation)
Pros
Simple solution
No change to SPA arrangements
No extra burden on iGT
Cons
No account taken of changes in gas usage
No correction for erroneous AQs

6. Option B
Reconciliation on AQ, for every AQ change. Following an AQ change, iGT advises Xoserve of old and new AQ, applicable start dates and applicable Shippers. Difference in AQ billed as a change to allocation, split between applicable Shippers. Separate process to LMN AQ updates.
Pros
Simple solution
Not dependent on change to SPA arrangements
Takes account of changes in usage and Shipper transfers
Cons
No check against LMN AQ updates
Extra burden on iGT
Relies on timely and accurate AQ reviews by iGT

7. Option C
Aggregated Rec by SSP LMN – iGT Reads all meters in a CSEP on same day and submits total actual volume
Pros
Not dependent on change to SPA arrangements
Takes account of changes in usage and Shipper transfers
Cons
Increased burden on iGTs
Unfeasible to read all meters one day?
Reconciliations not visible at MPR level

8. Option D
Meter installed at every offtake – Reconciliation between GT and iGT? iGT to perform individual meter point reconciliations?
Pros
No change to SPA arrangements
Clarity of large GT throughput
Cons
Large scale engineering project
Does not help attribute energy to individual meter points
Increased burden on iGTs

9. Option E
Each SSP = 1 LMN – iGT submits dates and actual volumes – increase in data held in Gemini or other system
Pros
Takes account of changes in usage and Shipper transfers
Visibility of meter point transactions
Cons
Increased burden on iGTs
Meter asset data still held across diverse systems
Large increase in data processing for 1m+ MPRs

10. Option F
Single Supply Point Register for all direct and CSEP MPRs - allows full Meter Point Rec
Pros
Takes account of changes in usage and Shipper transfers
Visibility of meter point transactions
Cons
Significant change to iGT processes
Funding and governance not resolved

11. Option A - Illustration
No Meter Point Rec for SSP on CSEPs – but attract share of Reconciliation Neutrality
Initial Allocation – not to scale
Prod
1&2
Prod 4
Prod 3
NDM CSEP SSPs

12. Option A - Illustration
After Reconciliation
CSEP SSPs share in changes to Unidentified Energy via Reconciliation Neutrality
No other changes to CSEP SSP Allocation
Prod
1&2
Prod 4
Prod 3
NDM CSEP SSPs
Not to scale

13. Option B - Illustration
Option B – Reconciliation on each change of AQ
Assume Quarterly Rolling AQ for illustration only
iGT sends updated Shipper AQ totals to Xoserve for use in daily allocation
Separate notification to Xoserve of before- and after-AQs for SSPs
Also highlight any Shipper changes in the period

14. Option B - Illustration
Xoserve performs “AQ change Reconciliation”
Similar to End of Year Threshold Crosser Reconciliation
Reconcile for difference in allocation between old and new AQ
Take account of Shipper changes
Opposite energy amount feeds into Reconciliation Neutrality
Prod
1&2
Prod 4
Prod 3
NDM CSEP SSPs Reconciliation based on AQ movements
Not to scale