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Electricity Generation, Distribution and Supply in Ireland

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

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Electricity Generation, Distribution and Supply in Ireland

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  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

  5. Generation Fuel Mix

  6. ESB Power Stations - Thermal

  7. ESB Power Stations - Hydro

  8. Independent Power Producers Edenderry Power 120 MW Peat Synergen 400 MW Gas Huntstown 343 MW Gas

  9. Generation Market Shares 2005 18% 60% 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

  13. 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)

  14. Efficiency of Total Electricity System

  15. 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

  16. CO2 Emissions per kWh of Electricity Generated

  17. Energy Related CO2 Emissions by Mode of Energy Application

  18. Relative Cost of CO2 Reduction Measures * Climate Change Strategy

  19. 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

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