Operational control of wind farm clusters for transmission system operators

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Operational control of wind farm clusters for
transmission system operators

• K. Rohrig, B. Lange, M. Wolff, R. Mackensen
• D. Braams
• B. Valov, S. Heier
• L. Hofmann, M. Rosin
• C. Scholz, A. Könnemann
• K. Biermann

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Overview

• Challenges for the Integration of Wind Power
• Wind Farm Cluster Concept
• Wind Farm Cluster Management System
• Field Test
• Summary
• Outlook

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Challenges for the Integration of Wind Power
The German Wind Power Plant 21,400 MW 18,900
WT as of 09/2007
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Challenges for the Integration of Wind Power

• Too much power generation in one region at low
  load hours
• Congestion management needed

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Challenges for the Integration of Wind Power
Load profile wind generation 2015
Tomorrow konv. generation load wind
generation 0

• No conventional generation is running
• gt Grid management (frequency, voltage control,
  ...) needed

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Challenges for the Integration of Wind Power

• Solutions
• Power output forecasting
• Generation control for high penetration of wind
  power
• Extension of capabilities to provide ancillary
  services
• New tools for the integration
• in the electricity supply system
• are needed
• Power output forecasting
• Generation control

Source PE Netz
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Wind Farm Cluster Concept

• Aim of wind power generation control
• Make wind power controllable
• Allow wind power to take part in grid management
• Focus on transmission grid
• Control strategies
• Congestion Management
• Reduction of gradients
• Supply of reactive power
• Voltage control
• Supply of balancing power
• Scheduling of wind power feed-in

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Wind Farm Cluster Concept
Cluster all wind farms connected to a
transmission grid node
Forecast and Measurement
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Wind Farm Cluster Concept
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Wind Farm Cluster Concept
TSO Cluster Wind farm Turbine

• Hierarchical control system
• Control of clusters according to the requirements
  of the TSO
• Wind Farm Cluster Management System (WCMS)

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Wind Farm Cluster Management System
Active Power Limitation
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Wind Farm Cluster Management System
Supply of balancing power by means of short term
prediction and tolerance band
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Wind Farm Cluster Management System
Supply of balancing power by means of short term
prediction and tolerance band
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Wind Farm Cluster Management System
Supply of balancing power by means of short term
prediction and tolerance band
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Wind Farm Cluster Management System
Weather forecast
Wind Farm Cluster Management
Forecast
WCM
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Field Test
Substation Wechold
Wind Farm Mainsche/Pennigsehl33 WT / 60,4 MW
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Field Test
Cluster available power
Cluster actual power
Cluster control setting
Substation Wechold
Penningsehl available power
Penningsehl actual power
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Summary

• Integration of large amounts of wind power make
  new tools for grid operation necessary
• For integration of wind power, the Wind Farm
  Cluster Management System (WCMS) has been
  developed at ISET
• Cluster all wind farms connected to one
  transmission grid node
• Provides forecast and allows control for each
  grid node
• Gives the TSO an extended control of the Wind
  Power Plant
• Its capabilities are currently demonstrated in a
  field test in Germany

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Outlook WCMS demonstration at alpha ventus

• alpha ventus
• Operated by E.ON, EWE, Vattenfall Europe
• Erection 2008 and 2009
• RAVE Research at alpha ventus
• Research funding by BMU of about 50 Mio.
• Research coordination by ISET
• Demonstration of WCMS planned

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Outlook WCMS in Spain and Portugal

• European research project Wind on the Grid
• WCMS demonstration in Spain and Portugal
• Additional hierachy level Wind farm operator
• New control strategy Voltage control

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Outlook Combination of different renewable
energies
Renewable Virtual Power Plant 100 Supply by
Wind, PV, Biogas and Pump Storage Model 1/10000
of German load
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Thank you for your attention !
Institut für Solare Energieversorgungstechnik e.V.
Systems Technology for the Use of Renewable
Energies and Efficient Energy Conversion

• Research partly funded by

www.iset.uni-kassel.de www.rave-offshore.de www.ko
mbikraftwerk.de