Future Energy Scenarios 2015 Operability John West Electricity Policy and Performance Manager, Network Strategy

What’s happening to operability?

Impact of changes on operability System Inertia (MWs) Falling system inertia is driving changes Reducing inertia March April May June

Impact of changes on operability Managing higher voltages is driving up costs

Impact of changes on operability Distributed generation makes demand and generation more volatile Photovoltaic generation profileChanging demand profile Distributed and micro generation Transmission demand Time Saturday 6 th June 2015Saturday 13 th June % 75% 50% 25% % of rated output

Changing generation mix Non-synchronous generation Synchronous generation Distributed and micro generation Transmission demand Consumer Power 100% 75% 50% 25% 0% 100% 75% 50% 25% 0%

High solar impacts system operability Consumer Power Transmission demand (GW) Time Summer minimum demand

System operability framework development

How does SOF work?  System Inertia  Short Circuit Level  Conventional Generation Closure  Distributed Generation  Heating & Transportation  New Nuclear Plant  Reduced Controllability  Reliance on External Networks  More HVDC Links TopicsTimelineSolutionsTimelineSolutions

How does SOF work? TopicsTimelineSolutionsTopicsSolutions

How does SOF work?  Solutions achieved through engagement  New Frequency Services  New Voltage Services  Demand Side Response  Innovation Opportunities  Synchronous compensation  Distribution System Operator  Technical Code Changes TopicsTimelineSolutionsTopicsTimeline

SOF development timeline

SOF Summary There are significant challenges for whole system operation Major changes are occurring in the GB energy landscape There is an opportunity for market and technical solutions, get involved by contacting us at:

Future Energy Scenarios 2015 Summary Roisin Quinn Head, Energy Strategy and Policy