FLOW - System stability impacts: Grid code compliance for HVDC connected offshore wind power plants


Project Description

The development of Far and Large Offshore Wind (FLOW) power generation in the North Sea has been significantly accelerated in the last years. The large distance from shore in combination with the need for large transmission capacity has raised the interest for the voltage source converter high voltage direct current technology (VSC-HVDC). Transmission system operators in order to ensure high degree of the power system security of supply, impose strict grid connection requirements to offshore wind power plants and their HVDC transmission. Based on these boundary conditions, the overall research objectives that have been assessed in the context of this thesis include the following. Assessment of the state of the art coordinated fault-ride through strategies for offshore wind power plants with VSC-HVDC transmission. Analysis of unbalanced grid faults for wind power plants with VSC-HVDC transmission. Investigation of the effect of negative sequence current control for onshore and offshore AC faults. Analysis of the effect of typical grid codes on the power system voltage and rotor angle stability. The developed methodologies, models and control schemes proposed within the context of this thesis could facilitate the analysis and stable operation of transmission systems with VSC-HVDC connected offshore wind power plants.

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Contact: M. (Mario) Ndreko
Ph.D. Thesis: Offshore wind power plants with VSC-HVDC transmission


Project Team:

M. Ndreko

Dr.ir. Mario Ndreko received the M.Sc. degree in electrical power systems from the National Technical University of Athens, Athens, Greece, in 2009 and the M.Sc. degree in sustainable energy technology from the Delft University of Technology, Delft, the Netherlands, in 2012. He received his Ph.D. degree on the grid integration of remote and large offshore wind power plants at the Intelligent Electrical Power Grids Group at the Delft University of Technology. Since 2010, he has been a Chartered Engineer and member of the Greek Technical Chamber. His research interests include power system control and stability with large-scale offshore wind generation and HVDC transmission.

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