1. 12 November 2009 energynetworks.org 1 PRESENTED BY SIMON BROOKE, ON BEHALF OF WSA Presentation from Workstream A looking at the Network Modelling aspects of the EDCM Common Methodology Group Work

2. 12 November 2009 Agenda Background Workstream A Terms of Reference Progress to date Next Steps energynetworks.org 2

3. 12 November 2009 Background Collective Licence Modification (CLM) on Common EHV Distribution Charging Methodology (EDCM) and Decision document on EHV charging and governance arrangements published on 31 July 2009 CLM allows for DNOs to choose: Long run incremental cost methodology; or Forward cost pricing methodology Workstream A formed to draft methodology statements and implementation notes for Power Flow Analysis for both EHV charging methodology and where possible ensuring commonality energynetworks.org 3

4. 12 November 2009 Workstream A Terms of Reference Membership All DNOs represented by Distribution Engineers Meeting Frequency Weekly meetings either face-to-face or via teleconference Scope To develop network modelling specifications for both EHV charging methodologies based on Ofgem decision document Deliverables For each EHV charging methodology: 1.Methodology Statement 2.Implementation report/guidance notes For each DNOs: 1.Compliance Register Plus a Commonality Report Timetable Plan to deliver above documentation by 31 December 2009 ToR available on ENA website at: http://2009.energynetworks.org/edcm/http://2009.energynetworks.org/edcm/ energynetworks.org 4

5. 12 November 2009 Progress to Date Workstream A has met seven times Developed Project Plan and meeting schedule Developed working drafts of all deliverables Issued Invitation to Tender for Technical support to assist with document delivery energynetworks.org 5

6. 12 November 2009 Next steps Appoint Technical Support for WSA Agree boundary with WSB Create and finalise WSA documentation before Christmas A PRESENTATION BY THE REGULATION GROUP OF THE ENERGY NETWORK ASSOCIATION energynetworks.org 6