Due to the increasing amount of active grid components (e.g. inverters and HVDC systems) power system dynamics are changing. For some scenarios, this might lead to diminished stability reserves which could result in critical system states with respect to overall system stability and therefore requires detailed analyses of different stability aspects.
The research team System Stability develops models and methods in order to identify and assess critical states and fault scenarios within the transmission grid. Original simulation tools are developed (e.g. MatPAT for time domain simulation) in addition to the use of commercial tools. The optimisation of established methods and models enables the analysis and evaluation of harmonic, transient, frequency and voltage stability in extensive transmission systems.
Key research topics
- Dimensioning of reactive power reserves, placement and operation of compensation devices and parametrisation of local controllers for voltage stability enhancement
- Comprehensive dimensioning of HVDC systems and development of control strategies to provide ancillary services in AC-grids supporting frequency stability
- Modelling and simulation of active distribution grids with high shares of renewable energy sources for stability studies of transmission grids
- Development of simulation and analysis tools for system splits in transmission grids and investigation of frequency stability considering frequency-voltage-interdependencies
- Investigation of the impact of active grid components on harmonic stability