1. Fortmann, J.; Engelhardt, S.; Kretschmann, J.; Feltes, C.; Erlich, I.;, (2009) “Validation of an RMS DFIG Simulation Model According to New German Model Validation Standard FGW TR4 at Balanced and Unbalanced Grid Faults”, 8th International Workshop on Large-Scale Integration of Wind Power into Power Systems as well as on Transmission Networks for Offshore Wind Farms, Bremen, Germany
2. Feltes, C.;, (2011) “Advanced Fault Ride-Through Control of DFIG based Wind Turbines including Grid Connection via VSC-HVDC”, Dissertation, University Duisburg-Essen
3. Feltes, C.; Engelhardt, S.; Kretschmann, J.; Fortmann, J.; Erlich, I.;, (2010) “Dynamic Performance Evaluation of DFIG-based Wind Turbines regarding new German Grid Codes Requirements”, IEEE PES General Meeting, Minneapolis, Minnesota, USA
4. Engelhardt, S.; Kretschmann, J.; Fortmann, J.; Shewarega, F.; Feltes, C.; Erlich, I.;, (2011) “Negative Sequence Control of DFG based Wind Turbines”, IEEE PES General Meeting, Detroit, Michigan, USA
5. Inzunza, R.; Sumiya, T.; Fujii, Y.; Ikawa, E.;, (2010) ,Parallel Connection of Grid-Connected LCL Inverters for MW-Scaled Photovoltaic Systems”, International Power Electronics Conference (IPEC)