Using hydro power to balance large amounts of offshore wind power

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Using hydro power to balance large amounts of
offshore wind power

• Magnus Korpås, Thomas Trötscher, John Olav Giæver
  Tande
• SINTEF Energy Research
• magnus.korpas_at_sintef.no

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Project Deep sea offshore wind power

• Installation at deep sea far from shore
• Unlimited potential and high energy output
• Minimized negative environmental impact
• Challenges
• Bigger, lightweight and strong wind turbines
  Foundation / floater
• Grid connection (AC, HVDC, multi-terminal)
• Grid connection and power system integration

HYWIND
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Floating offshore wind turbines a sustainable
energy future
25 TWh/y wind generation for supply to oilrigs,
mainland grid and trans-national connections

• Use Norwegian oil and gas industry know-how.
• Large scale commercial use of floating offshore
  wind turbines is viable by year 2020.
• The market is global.
• Hot political subject in Norway.

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Simulation study

• 5 simulation cases describing possible situations
  in 2025
• A 10 TWh load increase (120 TWh today)
• B added 2510 TWh offshoreonshore wind (5.5
  3.1 GW
• C added 20 TWh new hydro (120 TWh today)
• D added new wind in DE and DK (3x today)
• E added 3200 MW new exchange capacity (3 new
  HVDC cables)

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Wind data
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Power market model
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Long-term and seasonal variations in wind and
hydro generation
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Impact of 35 TWh wind on annual generation in
Norway
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Wind impact on hydro reservoir
A 10 TWh load increase
B Added 2510 TWh wind
Median
Median 2005 reference
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Wind impact on prices in Norway
Wind reduces winter price peaks in dry years
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Wind impact on prices in Norway
load increase
add wind in NO
add hydro in NO
add wind in DEDK
3200MW new HVDC
Hours with zero price caused by full hydro
reservoirs and limited export capacity
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Wind impact on net power exchange
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Conclusions

• Deep sea offshore wind power has very high
  potential in Norway
• Unlimited areas
• Very high wind speeds
• Norwegian hydro power is an ideal partner for
  large-scale wind power
• Wind power effectively relieves constrained
  energy situations in winter
• Year-to-year variations in wind generation shows
  very little impact on hydro reservoir utilization
  and prices
• Adding 25 TWh offshore wind, 10 TWh onshore wind
  and 20 TWh hydro is a plausible scenario
• Exchange capacity should be increased to avoid
  hydro spillage

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Further work

• Include year-to-year variations in wind speed
• Increase number of price areas
• Further tuning of water-value calcualtions
• Analysis and optimization of offshore grid layout

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