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

OWEMES Introduction Online Monitoring and Wind Power Forecasting Future challenges Wind Farm Cluster Control Conclusion Overview

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

OWEMES Typical load profile in Germany May yesterday: conventional generation = load Introduction

OWEMES Load profile & wind generation today today: conventional generation = load – wind generation Introduction

OWEMES 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

OWEMES 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

OWEMES I/Ro 1/2002

OWEMES 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

OWEMES Further growth & planned / approved offshore projects Future Challenges Planned offshore wind farms (2020): North Sea (AWZ) MW Baltic Sea (AWZ) MW

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

OWEMES 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

OWEMES 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

OWEMES Wind Farm Cluster Control

OWEMES Wind Farm Cluster Control

OWEMES 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

OWEMES Index Wind Farm Cluster Control Limitation of power output gradients

OWEMES Reserve power supply (500 MW) Wind Farm Cluster Control

OWEMES Guaranteed power supply Wind Farm Cluster Control guaranteed power supply

OWEMES 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