1 Department of Wind Energy, Technical University of Denmark2 Wind Energy Systems, Department of Wind Energy, Technical University of Denmark3 Norwegian University of Science and Technology
The earlier developed control method using a piecewise linear droop curve, with different droop values for the different segments, has now been optimised for dynamic performance. Non-linearities at the junctions of two linear droop sections have been adressed. Also non-linearity of power based DC voltage control has been adressed. Dynamic instability due to high control gains has been treated and a new improved control structure has been proposed. The concepts have been validated with RMS simulation with the DIgSILENT PowerFactory software on the CIGRE B4 DC grid test system.
HVDC; Power Converter; Active Power Control; Droop Control; Meshed DC Grid
Main Research Area:
10th International Conference on AC and DC Power Transmission, 2012