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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
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
how much electricity is generated
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)
independent power producers
Independent Power Producers

Edenderry Power 120 MW Peat

Synergen 400 MW Gas

Huntstown 343 MW Gas

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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.

esb network issues
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
efficiency considerations
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)
electricity suppliers
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
summary of key parameters
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