Grid integration and EMT analysis

The “Grid Integration and EMT Analysis” group investigates the grid integration of power electronic systems and the stability of converter-dominated grids based on EMT modeling and simulation. The focus is on large-scale grid studies, resonance and interaction analyses, as well as real-time validation for grid control and grid protection. We support grid operators and industry with models, tools, and studies for grid planning, operation, and restoration.

The group develops and validates EMT and frequency-dependent models (aggregated/detailed) for grids and installations, implements RMS/EMT and multi-rate co-simulations, as well as standardized model interfaces and impedance/resonance assessment methods. Python, MATLAB/Simulink, PowerFactory, PSCAD, and real-time environments (OPAL-RT) are used.

Collaboration with the Fraunhofer IEE “Grid Integration and EMT Analysis” group promotes the transfer from basic to applied research and forms the basis for joint research projects, workshops, and the supervision of research projects, master’s theses, and doctoral studies.

Topics:

• EMT modeling and co-simulation for grid integration (grid- and plant-specific models, aggregated EMT models, RMS/EMT and multi-rate co-simulation, tool interfaces)
• EMT grid studies in interconnected power systems (resonance stability and damping, interactions between grid-forming and grid-following converters, ancillary services including inertia/fast frequency reserve)
• Islanded grids and grid restoration (islanded grid control, re-synchronization, process simulation)
• Resonance stability and impedance analysis (active/passive approaches, simulation- and measurement-based methods, control HIL)
• Real-time validation for grid control and grid protection (RMS/EMT in OPAL-RT, EnWG §14a controllers, protection HIL, hybrid systems)