1. Integration of the German Offshore Wind Power Potential into the Electricity Supply System B. Lange, Ü. Cali, R. Jursa, F. Schlögl, M. Wolff, K. Rohrig

2. OWEMES 2006 - 2 Introduction Online Monitoring and Wind Power Forecasting Future challenges Wind Farm Cluster Control Conclusion Overview

3. OWEMES 2006 - 3 Wind Energy in Germany (12/05) Onshore: 18300 MW 17400 WEA Offshore: 0 50 % of installed capacity in Europe and 30 % world wide Introduction

4. OWEMES 2006 - 4 Typical load profile in Germany 1.-7. May yesterday: conventional generation = load Introduction

5. OWEMES 2006 - 5 Load profile & wind generation today today: conventional generation = load – wind generation Introduction

6. OWEMES 2006 - 6 Online Monitoring and Wind Power Forecasting Representative wind farms (sub-stations) E.ON: 59 sites 1912 MW VE-T:17 sites 499 MW RWE:16 sites 446 MW Online calculation of wind generation Numerical weather prediction (DWD) Short- and medium-term forecast with help of artificial neural networks Wind Power Management System WPMS

7. OWEMES 2006 - 7 Wind Power Management System (WPMS) In operation at: E.ON Netz, Vattenfall Europe Transmission, RWE Transportnetz Strom, Currently implemented at: EnBW Transportnetze Basis for horizontal exchange of wind power (EEG §14) Online monitoring and Wind Power Forecasting

8. OWEMES 2006 - 8 I/Ro 1/2002

9. OWEMES 2006 - 9 Online Monitoring and Wind Power Forecasting Development of forecasting error of the WPMS for one TSO Introduction of operational forecasting decreased the need for balancing power Improvement in forecasting similar to capacity increase

10. OWEMES 2006 - 10 Further growth & planned / approved offshore projects Future Challenges Planned offshore wind farms (2020): North Sea (AWZ)18.600 MW Baltic Sea (AWZ) 1.700 MW

11. OWEMES 2006 - 11 Load profile & wind generation 2015 tomorrow: konv. generation = load – wind generation = 0 !! Future Challenges

12. OWEMES 2006 - 12 Future Challenges Requires innovative management strategies for wind turbines, wind farms and wind farm clusters Key issues for future grid integration in Germany Ÿbalancing Ÿtransport and congestion management Ÿgrid management Ÿgrid security Ÿfrequency control

13. OWEMES 2006 - 13 Wind Farm Cluster Control Aggregation of on- and offshore wind farms allows innovative control strategies Enables TSOs to control a large number of turbines Allows control of wind farms with different capabilities

14. OWEMES 2006 - 14 Wind Farm Cluster Control

15. OWEMES 2006 - 15 Wind Farm Cluster Control

16. OWEMES 2006 - 16 Wind Farm Cluster Control Innovative grid management strategies limitation of power output reactive power supply and voltage control provision of balancing power generation according to schedule limitation of power output gradients

17. OWEMES 2006 - 17 Index Wind Farm Cluster Control Limitation of power output gradients

18. OWEMES 2006 - 18 Reserve power supply (500 MW) Wind Farm Cluster Control

19. OWEMES 2006 - 19 Guaranteed power supply Wind Farm Cluster Control guaranteed power supply

20. OWEMES 2006 - 20 Conclusion Today the main task for wind power integration is power balancing Solution: ŸOnline monitoring and exchange ŸWind power forecasting Higher penetration leads to new challanges ŸTransport ŸGrid management and security Wind power needs capabilities similar to conventional power plants => Wind Farm Cluster Control