DC voltage droop control is seen as the preferred control structure for primary voltage control of future multiterminal HVDC systems. Different droop control structures have been proposed in literature which can be classified in eight categories. This paper contributes to an analysis of the disturbance rejection of these droop control structures. The approach is based on multi-variable frequency response analysis where both ac and dc grid dynamics are incorporated. In particular, the amplification of dc voltage oscillations due to wind power variations is analyzed using singular value analysis. Further, the impact of dc cable modeling on the results is discussed. In addition, it is shown that the maximum singular value limits, frequently used in literature for MIMO-analysis, are not sufficient to prove that the impact of certain disturbances on analyzed outputs is within a certain boundary. It is necessary to verify the results by a multiple input single output analysis of the transfer functions connecting the inputs with the highest amplified output.
|Title of host publication||Proceedings of 12th IEEE Power and Energy Society PowerTech Conference|
|Number of pages||6|
|Publication status||Published - 2017|
|Event||12th IEEE Power and Energy Society PowerTech Conference: Towards and Beyond Sustainable Energy Systems - University Place, University of Manchester., Manchester, United Kingdom|
Duration: 18 Jun 2017 → 22 Jun 2017
|Conference||12th IEEE Power and Energy Society PowerTech Conference|
|Location||University Place, University of Manchester.|
|Period||18/06/2017 → 22/06/2017|
- HVDC transmission
- Wind energy integration
- Control system analysis
- State-space methods
Thams, F., Chatzivasileiadis, S., Prieto-Araujo, E., & Eriksson, R. (2017). Disturbance Attenuation of DC Voltage Droop Control Structures in a Multi-Terminal HVDC Grid. In Proceedings of 12th IEEE Power and Energy Society PowerTech Conference IEEE.