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Nexus Workgroup
CSEP Transition Topic
June 2014
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Contents
• Current numbers
• Naming conventions Modification 0440 Project Nexus – Single
Service Provision
• iGT Agency Services overview
• iGT data preparation
• Transition / cutover matters
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CSEPs Numbers
Live Projects – 41,567
LMN Count – 215,660
Domestic LMNs – 211,123
I&C LMNs – 4,537
Supply Points – 1,613,461
DM supply points on CSEP networks – 9, of which 5 do not meet
Class 1 DM mandatory criteria
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Naming conventions
• The following slides set out the proposed conventions for the
GT arrangements to the Connected System Exit Point (CSEP).
• New names are required for the connections at and within the
CSEP on the iGT gas system (IGT System) and GT gas
system (GT System).
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Naming Convention - Current pre-Nexus
arrangements
• The CSEP is provided with a reference number
• Each iGT maintains individual meter point reference numbers for the
supply meter points on the iGT System
• Logical Meter Numbers (LMNs) are used by the iGT and Xoserve to
administer the GT arrangements to the CSEP e.g. transportation
invoicing
• Each Larger Supply Point (LSP) has a unique LMN
• For Smaller Supply Points (SSP) the iGT aggregates values for each
shipper and provides one LMN for each shipper’s aggregate values
to Xoserve
• Xoserve uses the LMNs to administer GT and energy balancing
arrangements
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Naming Convention - Current pre-Nexus
arrangements
• The current arrangements use two reference numbers; the iGT
MPRN and the LMN.
• The iGT MPRN is used to establish commercial arrangements with
the iGT
• The LMN is used to establish commercial arrangements with the GT
• In future the iGT MPRN will be used as the reference for both iGT
and GT commercial arrangements
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Naming Convention - Nexus arrangements
• To enable Shippers to use the 4 settlement products, the LMN and
aggregation processes need to change.
• In future each supply meter point and supply point to the CSEP will
be recorded individually, and where processes require, aggregation
will be completed by Xoserve
• To make these arrangements effective new UNC defined terms are
required to accurately name the physical and commercial
arrangements at the CSEP.
• The following slides set out these new arrangements
• Note: GT transportation charging principles are not affected by these
new naming conventions
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Independent Gas Transporter
System Supply Point (IGTS Supply
Point)*
and
Independent Gas Transporter
System Supply Meter Point
(IGTS Supply Meter Point)*
iGT system
CSEP, against which is recorded the CSEP
Supply Point*
and CSEP Supply Meter Point*. These
correspond to the IGT System Supply Point
and IGT System Supply Meter Point
GT system
GT charges to this point
* New defined terms in UNC
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Naming conventions
• The physical Connect System Exit Point (where the iGT makes a
connection to a GT pipe) is still the CSEP
• The point of the emergency control valve for a service pipe
connection to a property on the iGT System is to be known as an
Independent Gas Transporter System Supply Meter Point (IGTS
Supply Meter Point)*.
• The Independent Transporter System Supply Meter Point is also the
Independent Gas Transporter System Supply Point (IGTS Supply
Point)* for commercial arrangements.
• The CSEP Supply Point* and the Independent Gas Transporter
System Supply Point is a one : one relationship. I.e. a CSEP Supply
Point corresponds to an Independent Gas Transporter System
Supply Point.
* New defined terms in UNC
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Naming conventions
• The CSEP Supply Meter Point* and Independent Gas Transporter
System Supply Meter Point is a one : one relationship. I.e. each
Independent Gas Transporter System Supply Meter Point
corresponds to a CSEP Supply Meter Point recorded at the CSEP.
The CSEP Supply Meter Point will not be a physical item it is a
notional value against which GT services are provided.
• GT arrangements e.g. transportation charging etc are made up to the
CSEP Supply Meter Point (at the CSEP) and not beyond.
• The Shipper will nominate the Class (product 1,2,3 or 4) for each
individual CSEP Supply Point. This will be will be done by the
Shipper nominating the Independent Gas Transporter System Supply
Point with the relevant Class code. This then sets the arrangements
for the GT transportation for the CSEP Supply Point.
* New defined terms in UNC
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iGTS
Supply Point
iGT system
CSEP
Supply Point
GT system
Registration – a Shipper registers the iGTS Supply Point and is therefore
registered to the corresponding CSEP Supply Point
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iGTS Supply Point
(MPRN 7412345678) nominated as
Product 2
iGT system
CSEP, against which is recorded the
CSEP Supply Point and CSEP Supply
Meter Point. These correspond to the
IGTS Supply Point and IGTS Supply
Meter Point
GT system
Shipper makes gas nominations daily to this point (here CSEP Supply Point) for the Independent Gas Transporter
System Supply Point e.g. MPRN 7412345678, for GT charges
Energy is allocated to this point (here CSEP Supply Point) for the Independent Gas Transporter
System Supply Point e.g. MPRN 7412345678, for GT charges
Energy is reconciled to this point (here – CSEP Supply Point) for the Independent Gas Transporter
System Supply Point e.g. MPRN 7412345678, for GT charges
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iGT Agency Services overview
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Scope of iGT Agency Services
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Xoserve, as the iGT Transporter Agency, will provide services on behalf of
iGTs, these include:
CSEP record creation
MPRN record creation
Supply Point Register maintenance
Change of Shipper/Supplier processing
Read submission
Annual Quantity review
Query services
•
Shippers will have a single interface for services regardless of GT type.
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Xoserve will not be providing iGT transportation invoicing on behalf of iGTs
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UK Link Programme
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The UK Link Programme in Xoserve set up to deliver the changes as part of the
replacement of UK Link
As part of the programme of work we are identifying:
• Transitional requirement’s - where a technical solution is needed to meet pre
1st October obligations
• Cut Over issues – one off activities to move from legacy systems/processes
to UK Link
• Data Requirements
For iGT Supply Points this includes a data preparation database to ensure iGT
data is compatible with the UK Link system
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iGT Single Service Provision
Data Preparation Overview
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Background
• UNC Modification 0467 raised to obligate the provision of iGT
CSEP and Supply Meter Point data to Xoserve
• Required to enable the implementation of UNC Mod 0440 and
iGT UNC Mod 039 (Single Service Provision)
• Supporting Non-Code User Pays Service established to
recover costs (UP Change 007)
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Purpose of Data Preparation
• Supports the implementation of iGT Agency Services through:
– Capturing of the required data for all unmetered CSEPs and
associated Supply Meter Points (SMP) from all iGTs
– Mapping of MPRN to CSEP to iGT Licence Holder to iGT
organisation
– Validate, cleanse and update CSEP and SMP data
– Identify any CSEP discrepancies with CSEP system
– Provide portfolio reports to iGTs, GTs and Shippers
– Prepare data ready for migration into the new UK Link
System
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Key Data Interactions
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Industry Reporting
• Portfolio reports will be issued to relevant iGTs, GTs and
Shippers for verification
• Data quality reports will be issued to the iGTs
• Any resulting updates that are required to either the CSEP or
Supply Meter Point data will be submitted to Xoserve via the
relevant iGT
• A final portfolio report will be issued to confirm the definitive
CSEP and Supply Meter Point data set just prior to migration
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Transition and cutover matters
Larger Supply Point (LMN) reconciliation
Change of Supplier events
Supply Point Register updates
iGT UNC modifciations
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Reconciliation
Modification 432 creates arrangements for individual meter point reconciliation for all
supply points. With the implementation of iGT Agency Services modification 432 will
apply to all iGTS supply points at the CSEP.
For an iGTS supply point, the first reading submitted by a shipper after 1st October
2015 will create a reconciliation back to the previous read i.e. before 1st October 2015
For smaller supply points, this reconciliation will be split into 2 periods, with only the
period after 1st October 2015 generating a charge.
Read 1
1st October 2015
Rec period (not billed)
Read 2
Rec period (billed)
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CSEPs Large Supply Point Reconciliation
Pre Cut Over - CSEPs Data Base
Meter Reading
10th June 15
Loaded into SAP
1st Oct 2015
Post Cut Over - SAP
1st August
2015
Meter Reading
Nov 15
Exceptions will be made
for Shipper Transfers
and meter exchange
Individual MPRN Reconciliation using
meter read consumption between June
15 to November 15
LMN reconciliation up
to 10th June 15
LMN LSP Meter readings will not be used between
1st August 2015 – 30th September 2015 in LMN rec
or loaded to UK Link
= Rec Period
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CSEPs Large Supply Point Reconciliation
For Larger Supply Points (LSP) there is a transition matter to consider.
LSPs are already subject to individual meter point reconciliation at Logical Meter
Number (LMN) level on existing CSEPs off-line systems.
The first read post 1st October 2015 will create a reconciliation back to the read
loaded to UK Link system (from the data preparation database)
To ensure there is sufficient time to process reconciliations on the CSEPs off-line
system before it is decommissioned, the off-line system will be “closed” early.
We would expect that all reads processed prior to 1st August 2015 would generate an
LMN Reconciliation pre 1st October 2015
Only LSP reconciliations required as a result of a shipper transfer or meter exchange
will be processed.
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CSEPs Large Supply Point Reconciliation
• LMN Reconciliation will not be processed for reads post 1st August 2015
• LMN reconciliation periods will be up to the last reading provided to the
data preparation database (the one to be loaded to UK Link) i.e. the read
pre 1st august 2015
• The last reading provided to the data preparation database i.e. the read pre
1st August 2015 will be the opening reading in UK Link for the next
reconciliation period i.e. the next read after 1st October 2015
• Read history will be loaded in UK Link to allow AQ process to commence
on reads post 1st October 2015
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In-flight Change of Shipper events
• There will be change of Shipper events in progress at Cutover.
• The Shipper will have instigated the process using iGT
processes and file flows
• The incumbent Shipper will have received some information
regarding the event
• The end point of the event occurs after 1st October
• What needs to be achieved is clear, the optimum solution has
not yet been developed
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In-flight supply point register updates that
pre-date 1st October 2015
• iGT Supply Point Register updates e.g. meter reading, meter
asset updates etc,
– Events e.g. meter reading and meter asset, will be occurring on
30th September
– Consideration is being given to the iGT supply point registers
which may have to close their final position on [27th] September to
allow updates to be processed, passed to Xoserve, applied to the
data preparation database to enable the final shipper portfolio to
be issued to Shippers and for the data to be migrated to UK Link.
• Any supply point register updates will need to be submitted by
the Shipper post go-live and will be effective on the system for
the correct date. Due to timing some meter reads may reject.
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Supply Point migration
UNC modification 432 Project Nexus – Gas Demand Estimation, Allocation,
Settlement and Reconciliation reform, creates 4 classes of supply points:
Class 1 - Daily Metered (Transporter provided read service):
• supply points with an AQ in excess of 58,600,000
• supply points connected to the NTS
• DNi supply points (note minimum AQ for DNi eligibility is 5,860,000)
• Mod 458 (still subject to approval), Seasonal Large Supply Points.
Class 2 - Non Time Critical Daily Metered (Shipper provided read service)
supply points with an AQ up to 58,599,999
Class 3 - Batched Daily Reading, (a months reads provided in one file to allow
reconciliation by daily readings) supply points with an AQ up to 58,599,999
Class 4 - Periodic Readings, supply points with an AQ up to 58,599,999
For iGT supply points, those supply points meeting the Class 1 criteria
will migrate as Class 1, all other supply points will be migrated as
Class 4.*
* Current DMV sites and their migration class is under review
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iGT UNC modification for service consistency
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Changes to the GT UNC need to be reflected in the iGT UNC to ensure
service consistency and correct arrangements to the CSEP
Example modifications include:
– 410A Responsibility for gas off-taken at Unregistered Sites following New
Network Connections
– 424 Re-establishment of Supply Meter Points – prospective measures to
address shipperless sites
– 425 Re-establishment of Supply Meter Points – Shipperless sites
– 429 Customer Settlement Error Claims Process (and 474S)
– 431 Shipper/Transporter - Meter Point Portfolio Reconciliation
– 463S Recognition of the ‘2nd January’ Scottish Bank Holiday as a
Business Day for Supply Point related transactions
– General data permission release modification