1. Electricity Generation, Distribution and Supply in Ireland Bob Hanna SEI 24 September 2003

2. Electricity Generation, Distribution and Supply in Ireland How much electricity is generated? Fuel mix for generation Structure of the electricity supply system Generating Stations Efficiency Suppliers Emissions

3. How Much Electricity is Generated? Installed Capacity is about 4,700 MW Peak Demand over 4,000 MW Instantaneous Power varies between 1,200 MW and 4,000 MW Electricity Generated per annum c. 22 TWh (22,000 GWh)

4. Generation Fuel Mix

6. ESB Power Stations - Thermal

7. ESB Power Stations - Hydro

8. Independent Power Producers Edenderry Power120 MWPeat Synergen400 MWGas Huntstown 343 MWGas

9. Generation Market Shares 2005 60% 18% 22%

10. Forecast All-Ireland Generation 2005

11. The ESB system comprises a 400/220/110kV network with generation distributed around the country but with a significant proportion concentrated in the Dublin area.

12. ESB Network Issues Planning Difficulties for O/H LInes Significant Low Voltage + Congestion Problems Capex Constraints (~ €0.5 Billion) “Shallow” Connection Policy Delayed Access for New Entrants Inadequate Generation Margins

14. Efficiency Considerations Conventional Thermal Power Plant:30 – 36% Large Open Cycle GT Plant:36% Large CCGT Plant:55% Medium Scale CHP Plant:80% (inc. heat)

15. Efficiency of Total Electricity System

16. Electricity Suppliers The market is 40% open (threshold is 1 GWh per annum) Approximately 40 licensed suppliers! 4 main competitors to ESB Supply: Energia ESB Independent Energy BGE Airtricity

17. CO 2 Emissions per kWh of Electricity Generated

18. Energy Related CO 2 Emissions by Mode of Energy Application

19. Relative Cost of CO 2 Reduction Measures Service Strength of Demand Growth CO 2 Intensity Relative Cost of Reduction* Electricity+++++1 Heat+++10 Transport+++ 5 * Climate Change Strategy

20. Summary of Key Parameters Diversified fuel mix (but increasingly less so) Almost totally isolated system (but increasingly less so) Long overhead lines at low TX or DX voltages Transmission constraints Generation shortage Price! Choice of Suppliers Electricity focus for Emissions Reductions