Geoff Murphy 25 th October 2012 Dynamic Thermal Rating Project

Tier 1 Low Carbon Network Fund Project £450k Project Duration: July 2010 – July 2013 Partners: Dynamic Thermal Rating Project Scope Release Network Capacity for 132kV Wind Generation Provide Control Room with Complete Visibility Gain Business Confidence to Offer ANM Solution

30% increase in the capacity of new and existing overhead lines Low cost per additional MW of capacity Potential to facilitate faster network connections Could reduce the visual impact of new lines Will require additional resource and financial commitments over their lifespan to maintain DTR Schemes perceived to add risk to network security Will require changes to connection offers and the acceptance of generators DTR Benefit: DTR vs. Business as Usual Connection

Operational scheme based on SPENs IET Innovation Award winning project Utilises weather stations and a geographic model of the network to interpolate the weather conditions and ratings at any span DTR calculated validated against conductor temperature measurements Original Trial Results: 30% sustainable uplift upon existing seasonal ratings Strong correlation with wind farm output 20% additional energy yield for wind farms controlled to DTR DTR Approach: Thermal State Estimation with Integrated Sensors

10km coverage of Weather Stations Weather Station Measurements: – Ambient Temperature – Solar Radiation – Wind Speed – Wind Direction x8 Conductor Temperature / Current Sensors Fibre / radio / GPRS communication channels Stand alone SCADA Client DTR Approach: Thermal State Estimation with Integrated Sensors

DTR Approach: SCADA Based Model and Algorithm

DTR Results: DTR vs. Static Ratings in September

DTR Results: Limiting Spans Connahs Quay – St Asaph

SUMMER RATING 30% UPLIFT DTR Results: DTR Correlation with Local Wind Farm Output Probability of Uplift

Remaining Weather Station Installation RTU Firmware Refinement Conductor Temperature / Current Sensor Installation LCNF Tier 1 Active Network Management trial Business Engagement – Trial and Refinement of graceful degradation scheme – Analysis of DTR performance Policy Refinement to accept DTR Integration into PSMC SCADA System DTR Progress: Next Steps

DTR Project Key Innovation 1.Central SCADA platform – common to most UK DNOs 2.Repeatable methodology 3.Balance of distributed / centralised intelligence 4.Development of DTR Manual 5.Graceful degradation Internal: Project Steering Group Innovation Day Briefings Team Briefings External: SPEN Innovation Website IET Smart Grids, London, June 2011 CIRED Paper and Conference, Frankfurt, June 2011 LCNF Conference, Newcastle, July 2011 IEEE Paper and Conference, Manchester, December 2011 GE User Forum, Kirkintilloch, September 2012 Ordnance Survey Seminar, October 2012 In the pipeline... IET Manchester, 2013 CIRED 2013