1. Transmission Planning Code Review
Transmission Workgroup 3rd May 2012

2. Background
National Grid Gas (NGG) has a licence obligation under Licence Special Condition C11 to review and consult on the Transmission Planning Code (TPC)
Developed to improve transparency of NTS planning process
Description of the main technical factors that affect the planning and development of the NTS and includes a methodology to determine the physical capability of the NTS
NGG must comply with and maintain the TPC, reviewing it at least every two years
Review cycle will include consultation with interested parties
NGG will produce a report and submit it to GEMA (“Authority”)
Modifications to this code must be approved by the Authority before they are implemented from 1st October 2012

3. TPC – What is it?
Framework document relating to the planning and development of the NTS
Methodology to determine the physical capability of NTS considering:
Entry and Exit Capacity release obligations
How much capacity can be transferred / traded between entry points
How incremental flows at entry and exit affect system capability
Statutory network security obligations
Detailed assumptions on:
Likely developments in the patterns of gas supply and demand
How the system will be operated under different supply and demand scenarios
Main technical factors that affect the planning and development of the NTS
Link to website :

4. History 2008 2010 Mar Apr May Jun Jul Aug Sep Oct
Open letter inviting views on scope
Industry discussions on draft document
Formal consultation, then report within 28 days
Authority considers consultation report (28 days)
Implement from 1st Oct 2008
2010
Aug
Sep
Oct
Nov
Issue Consultation
Submit Report
Approved by Authority
Only change - Design Margins

5. Chapter Summary Chapters 2 & 3:
Legislative framework, policies and guidelines which have a direct bearing on the planning of the NTS and lead times for investment
Chapter 4:
Overview of the Planning Cycle
Chapters 5 & 6:
Supply and Demand assumptions used for planning
Chapters 7 & 8:
Commercial Entry and Exit Capacity release processes and their effect on investment planning decisions
Chapter 9:
Assumptions used for planning analysis

6. TPC timeline 2012 REVIEW CONSULT FINAL PROPOSALS OFGEM DECISION May
Submit Report to Ofgem
Implement TPC from 1st October 2012
REVIEW
CONSULT
FINAL PROPOSALS
OFGEM DECISION
May
Jun
Jul
Aug
Oct
28 days
28 days
28 days
Ask for issues at Tx Work Group (1st Thursday in May)
Covering Letter via JO
Capture issues
Write Report
Identify NG marked changes
Publish non confidential responses on NG website
Ask to receive issues by 3rd Friday
Include any supplementary questions
Publish material on TPC section on NG website ahead of consultation

7. Summary Notice of TPC review and formal consultation
National Grid request that any issues with areas of the TPC which may require review to be notified via by Friday 18th May 2012
Issues to be sent via to
Next steps for consultation covering letter to be published via Joint Office in June to formally open consultation