BackgroundTo achieve 100% independence from fossil fuel by 2050, the Danish government is planning to introduce a new concept called energy islands, with the goal of connecting power grids of multiple countries and transporting gigawatts of energy from surrounding offshore wind farms to the shores of these countries. The North Sea Energy Island, in particular, has a long-term goal of achieving a 10 GW capacity. The stakes are high, as a failure in its operation could potentially cause a blackout of the entire European electricity system. Therefore, extensive research and development efforts are necessary to ensure the stable and reliable operation of these energy islands
Unlike traditional power systems, the Danish energy islands will be a 100% renewable system powered by offshore wind, which is a power electronic based system with zero inertia. To ensure stable operation of such a system, innovative solutions have to be developed and matured. Therefore, this PhD project aims to address stability issues arising from the lack of inertia and low short-circuit power in 100% converter-based energy islands and provide viable solutions. This issue can be resolved through coordinated control of power electronic converters in energy islands and introduction of new control techniques for each of those converters. The goal is to first perform all studies using PSCAD and MATLAB/Simulink. Then, test the proposed control algorithms and techniques in real-time simulators.
The results of my research will provide a coordinated control system for power electronic converters within energy islands. I will also propose novel control techniques for each of these converters, aiming to resolve stability issues arising from the lack of inertia and low short-circuit power in fully converter-based systems. Furthermore, this research will establish guidelines for developing stability assessment criteria for energy island systems. Ultimately, these endeavors will accelerate the deployment of wind energy and facilitate the transition to a power system based on renewable sources.Principal Supervisor: Mehdi Savaghebi
Co-supervisors: Gen Li and Nicolaos A. Cutululis
Research Group: Electric Energy
Project Period: 2023-2026