1. Chalmers University of Technology, Gothenburg, Sweden
2. Vattenfall Wind Power, Stockholm, Sweden
3. Volvo Car Corporation, Gothenburg, Sweden
4. Fraunhofer Institute for Wind Energy and Energy System Technology (IWES), Bremerhaven, Germany
5. Swerea IVF AB, Gothenburg, Sweden
6. Division of Electric Power Engineering, Department of Energy and Environment, Gothenburg, Sweden