Voltage-based Current Limitation Strategy to Preserve Grid-forming Properties Under Severe Grid Disturbances
Journal article, 2023
Grid-forming (GFM) converters are a promising solution to enable large scale integration of renewable energy sources into the power system. However, due to the intrinsic voltage-source behaviour of GFM converters, current limitation during large grid disturbances is challenging. This paper presents a novel limitation strategy that preserves the GFM properties of the converter and at the same time effectively limits the converter current to the desired value. Through the limitation of the converter's internal voltage, stable operation even during faults and in case of large frequency disturbances in the grid is achieved. Experimental results show the effectiveness of the proposed current limitation strategy in case of various grid disturbances.
current limitation
Frequency control
Power system stability
Voltage control
transient stability
Impedance
Frequency conversion
grid-connected converter
virtual inertia
Synchronization
Transient analysis
unbalanced faults
Grid-forming converter
Author
Anant Narula
Chalmers, Electrical Engineering, Electric Power Engineering
Paul Imgart
Chalmers, Electrical Engineering, Electric Power Engineering
Massimo Bongiorno
Chalmers, Electrical Engineering, Electric Power Engineering
Mebtu Bihonegn Beza
Chalmers, Electrical Engineering, Electric Power Engineering
Jan Svensson
Hitachi
And Jean Philippe Hasler
Hitachi
IEEE Open Journal of Power Electronics
26441314 (eISSN)
Vol. 4 176-188Subject Categories
Control Engineering
Other Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1109/OJPEL.2023.3246728