1. Transmission Planning Code
Transmission Workstream
6th March 2008

2. Introduction
National Grid Gas (NGG) has a new licence obligation to introduce a Transmission Planning Code by 1 October 2008 that will
“cover all material technical aspects relating to the planning and development of the pipe-line system…which may have a material impact upon persons connected to or using (or intending to connect or to use) the pipe-line system”
Aim is to improve transparency of NTS planning process
NGG will publish open letter on 7 March 2008 inviting views on the scope of Transmission Planning Code document

3. Transmission Planning Code – 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
How supply and demand patterns will develop over time
How the system will be operated under different supply and demand scenarios

4. Transmission Planning Code – Governance
Transmission Planning Code must be in force by 1 October 2008 after consultation with interested parties and approval by the Authority
NGG must comply with and maintain the code
Review and consultation process undertaken by NGG at least every 2 years
Modifications must be approved by the Authority

5. Timeline (2008) March April May June July Aug Sept Oct Nov...
Implementation
Development
7 March
Open letter inviting views on scope by 21 March 2008
April/May Industry discussions on draft document
June/July Formal consultation (28 days)
Aug/Sept
Authority considers consultation report
1 October 2008
target date for implementation

6. Draft Scope Legislative guidance documents
e.g. IGE recommended practice documents
Planning legislation and consents process
e.g. Implications for investment lead times
National Grid policies relevant to planning and development of NTS
e.g. assessment of new loads, design of NTS pipelines and installations
Network Analysis techniques
e.g. considerations for investment planning, how physical capability is determined
Supply and Demand Outlook
e.g. how TBE forecasts are used in investment planning

7. Next Steps
NGG publish open letter 7 March 2008 inviting views on draft scope
Responses requested by 21 March 2008
NGG to develop draft Transmission Planning Code document for discussion
Consideration given to licence requirements and industry views on scope
Industry workshops to discuss draft document during April and May – suggested dates are:
3 April 2008 and 1 May 2008 (after Transmission Workstream)
Further workshops June and July to support consultation if required