1. Delivering for 2020 TSO Facilitation of Renewables Studies EirGrid Customer Conference Jonathan O’Sullivan October 2009

2. Policy Targets and Outcomes EU Renewable Directive – 2009/28/EC –Exploiting Renewable energy Resources (Wind in Ireland) Regulation No 714/2009 Access to Network for Cross-border Exchanges in Electricity –Interconnection Directive 2009/72/EC Concerning Common Rules for Internal Electricity Market –Smart Metering – 80% by 2020 if beneficial Electric Vehicles -10% (National decision goes towards meeting boarder EU targets) –Announced November 2008 –Memorandum of Understanding between the Government, ESB and Renault- Nissan

3. The Power System: A complex control process

4. The Power System: Policy-led changes

5. Policy Impacts on Power System by 2020 Inputs Control Capability Control Strategies ? ?? ??

6. Ireland Renewable Policy Target Based on analysis of historical Capacity Factors and projected load growth

7. European Synchronous Power System Total Generation Capacities UCTE 600,000MW Nordel 92,000MW England Wales Scotland 76,000MW Ireland Northern Ireland 8,500MW

8. Impacts of increased wind penetration InputsControl CapabilityControl Strategies Plant Portfolio - Increased variation in generator output Generators – reduced percentage of conventional plant on the system Forecasting – improve to best possible Characteristics – increased use of asynchronous generation (Wind) Generators – possess excellent performance capability below full output Schedule and Dispatch – new tools and policies Network – difficulties in the short run, increased capability in the long run Protection – Fault levels may alter and need to adjust

9. Conventional Generation

10. Doubly Fed Induction Generator (DFIG)

11. Full Converter Windfarm

12. Generator Characteristic Comparison CharacteristicsSynchronousDFIGFull Convertor Reactive Control Largest range and control Good range and control Fault Ride ThroughExcellentGood Fault LevelBestMedium Least Contribution RampingGoodExcellent ReserveExcellentGood InertiaExcellentPoor

13. TSO Renewable Facilitation Studies Objectives: Increase our understanding of the behaviour of the power system with large amounts of renewable generation Identify any potential technical issues Develop mitigation measures Wrap it all up in a comprehensive strategy for the operation of the power system with large amounts of renewables Outcome will inform: Future operational policies Grid code and standards Discussions on remuneration regimes for all generation

14. TSO Facilitation of Renewables areas of Study Transient, Dynamic and Small Scale Stability Frequency Response of the system Fault Levels Reactive Power and Voltage Control Flexibility needs of the system

15. Frequency Response of System with Wind Plot of loss of 400 MW unit in a 2020 power system

16. Flexibility Requirements

18. TSO Facilitation of Renewables Studies Interim Result Presentation EirGrid Offices 160 Shelbourne Road 9 th November 2009 10:30am

19. Technology Breakdown of Installed Wind Classification TSODSO Capacity MWNo. TurbinesCapacity MWNo. Turbines DFIG325201321258 Full Converter42218350 Fixed Speed8725122148 Total 454247526456