- Merkebu Zenebe Degefa
- WP2 Lead
- SINTEF Energi AS
Impact of Virtual Oscillator Control on the instantaneous properties of VSC output voltage in distorted island grids
Challenge and objective
- Synchronization in island electrical grids dominated by power electronics is challenged by the absence of a grid reference to follow, lack of inertial sources and the usual lack of communication among the units.
- This paper investigates the instantaneous properties of voltage and frequency of Voltage Source Converters (VSCs) when they are controlled by Virtual Oscillator Controllers (VOC) in a distorted island grid.
- The results provide convincing evidence for the adoption of a more complex controller as the VOC in island grids that will naturally be more vulnerable to voltage distortions.
- The results encourage further explorations into other potential benefits of VOC in island grids
- The new approach to synchronize in cases where the classical droop control fails
Impact for distribution system innovation
- Topologies currently challenging seem to be possible to solve with the new technique.
Reference in CINELDI
- M. Melby, M. Molinas, O.B. Fosso: "Impact of Virtual Oscillator Control on the instantaneous properties of VSC output voltage in distorted island grids", IEEE 45th Annual Conference of the IEEE Industrial Electronics Society, 2019.