Electricity Grid Services and District Heating

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Electricity Grid Services and District Heating

• by Jens Guttorm

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Energi Fyn

• Energi Fyn is a consumer-owned electricity
  distribution company
• supplying approximately 85,000 grid customers in
  Funen with
• electricity.
• Turnover, approximate DKK 0.5 bn
• Employees, approximate 120
• Most important business areas
• Electricity distribution
• Electricity trading
• Fibre-optic networking
• Contractor tasks
• Power balancing

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Power Balancing a Method for Managing the
Electricity Grid

• When does the electricity grid need help?
• When yesterdays forecast for power consumption
  and production fails.

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Power-Balancing Need in Jutland and Funen
1 July 2005 31 July 2006
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Bound Production and Consumption,Two Days in
January 2003
Need for upward regulation
Probable need for for downward regulation
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Forecast Accuracy Theoretical PC Western Denmark
If installed capacity 2,374 MW then /- 1 m/s
gt /- 320 MW
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A Day in April - 1
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Wind Power Carpet in West Denmark
High concentration

• By 1 March 2004
• 4,175 wind turbines 2,374 MW
• Average size of wind turbines approx. 570 kW
• Average rotor diameter approx. 40 metres
• Average hub height approx. 40.5 metres
• 75 per cent of the installed wind capacity in
• Denmark.

Horns Reef offshore wind farm
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Renewable Energy Amplifies the Inability to
Store Capacity

• Possibilities
• allow centralised to run at partial capacity
• manage the grid via local embedded CHPs, or
• enhance the capacity of power-balancing stations
  with speedier response times

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Denmarks Electricity Grid

• The electricity grid in Denmark is well-developed
  but not
• dimensioned for moving large volumes of locally
  produced
• electricity.
• As a result, local power balancing facilities are
  an alternative to
• enlarging the overall electricity grid.
• Connections to foreign countries
• Our point of departure is a balanced system and
  to achieve this requires power balancing.
  Otherwise, the connections must be much stronger
  if the system is to be used for balancing power.
• If problems arise with wind-power production in
  West Denmark, the same will usually occur in
  Northern Germany.

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What is a power balancing facility?

• Upward regulationg typically involves a power
  station equipped with diesel-powered generator
  systems

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What is a power balancing facility?

• Downward regulation usually involves an
  electrical boiler

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Utilising Surplus Electricity for Heat Production

• Electricity is easy to convert into (storable)
  hot water
• The system must be connected to a
  district-heating grid with accumulation
  potential
• Electric boilers are relatively easy to install
• Alternative to downward regulation
• Stop wind turbines
• Does this make sense?
• Not if the energy can be used for generating
  heat.
• Electricity taxes can be an obstacle to the
  financial viability,
• however.

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Financial Aspects of Power Balancing

• Budgeted income base
• Availability payments, upward regulation 35
• Availability payments, downward regulation 15
• Carbon quotas 35
• Electricity production 5
• Heat production 5
• Investment approx. DKK 45 mill. EUR 6 mill.

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Establishing Kratholm
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Electricity Grid Services and District Heating

• Thanks for listening!