Extra Large Scale Virtual Power Plants New Concepts to Integrate German Wind Potential into Electric

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Extra Large Scale Virtual Power Plants New
Concepts to Integrate German Wind Potential into
Electrical Energy Supply
EWEC 2006, Athens Business, Science Technology
Introduction Wind power integration in
Germany Wind Farm Cluster Management XLS Virtual
Power Plants

Dr.-Ing. Kurt Rohrig
Institut für Solare Energieversorgungstechnik
Verein an der Universität Kassel e.
V. www.iset.uni-kassel.de




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Introduction
Wind Energy in Germany 18300 MW 17400 WT as of
12/2005 wind generation 25,9 TWh in 2004 26,3
TWh in 2005
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Introduction
yesterday konv. generation load
Typical load profile in Germany 1.-7. May
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Introduction
today konv. generation load wind generation
Load profile wind generation today
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Wind Power Integration in Germany
Forecast for the current wind power feed-in
Step 1 Online model calculates from few
measured windfarms the current power for all
plants Step 2 Prediction model calculates on
the basis of the current power of all plants and
the weather forecast the future wind power
feed-in Accuracy in the statistical averageover
95 for the D1 forecastover 96 for the 4
hours forecast Applications E.ON-Netz
Vattenfall Europe Transmission RWE
Transportnetz Strom EnBW Transportnetze
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Wind Power Integration in Germany
Wind Power Measurement Network Measurements at
representative wind farms (substations) E.ON
69 sites 2356 MW (33,2 ) VE-T 17 sites
725 MW (11,4 ) RWE 16 sites 461 MW
(15,2 ) EnBW 7 sites 108 MW (41,3
) Total 111 sites 3650 MW (21,8 )
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Wind Power Integration in Germany
Wind generation online, day-ahead forecast
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Wind Power Integration in Germany
Wind generation online, 4 hour forecast
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Wind Power Integration in Germany
Horizontal exchange of wind power generation
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Wind Power Integration in Germany
I/Ro 1/2002
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Wind Power Integration in Germany
today konv. generation load wind generation
Load profile wind generation today
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Wind Power Integration in Germany
Considering planned installations
offshore further growth up to 40 GW is expected
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Wind Power Integration in Germany
EC- Targets 2010 - generation
40
Pump storage generation
P,
100
75
Average renewable CHP generation
Pump load
50
25
Traditional generation
6 12 18
24
-25
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Wind Power Integration in Germany
tomorrow konv. generation load wind
generation 0 !!
Load profile wind generation 2015
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Wind Farm Cluster Management
The intermittent generation in range of several
(tenth) GW has increasing influence on two
important areas of TSOs tasks
grid management frequency control
and requires new concepts and strategies for
management and control of WTs, wind farms and
wind farm clusters
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Wind Farm Cluster Management

• Cluster Management
• Aggregation of large on- and offshore wind farms
  allows innovative control strategies
• Functions
• Consideration of data from online acquisition and
  prediction
• Aggregation and distribution of predicted power
  generation to different clusters (scheduling)
• Consideration of network restrictions arising
  from network topology
• Consideration of restrictions arising from power
  plant scheduling and electricity trading
• Scaling of threshold values
• Allocation of target values to different clusters

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Wind Farm Cluster Management
equivalent circuit diagram
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Wind Farm Cluster Management

• reactive power provision
• default maximum active power feed
• schedule setting
• voltage control on high/extra-high voltage level
• control power provision
• ability for primary control

Wind farm control with 11 Enercon E 66
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Wind Farm Cluster Management
Reserve power supply (500 MW)
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Wind Farm Cluster Management
Index
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Wind Farm Cluster Management
Cluster-Management
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XLS Virtual Power Plants

• Future Scenarios
• wind power generation in 10th GW range effects
  prediction errors in GW range
• large wind power fluctuations cannot be
  compensated only by control power
• interventions (control strategies) of WTs are
  limited
• Extra Large Scale Virtual Power Plants
• pooling of wind, CHP, storage devices and
  special conventional power plants
• to generation clusters
• fast and precise adjustment with modern ICT and
  innovative generation
• management
• continental energy exchange with consideration
  of RE generation of
• all partners
• Control Centre 2010
• active integration of generation pools into
  grid management
• active contribution of next generation WTs to
  system reliability

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XLS Virtual Power Plants
Make intermittend wind power generation compilant
to electrical supply system
and minimize the need of reserve and control power
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XLS Virtual Power Plants
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XLS Virtual Power Plants
Generation-Pooling by extra large virtual power
Plants with consideration of grid security and
supply reliability
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XLS Virtual Power Plants
Control Centre 2010
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Contact k.rohrig_at_iset.uni-kassel.de