Disturbance attenuation of DC voltage droop control structures in a multi-terminal HVDC grid
Document typeConference report
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Rights accessRestricted access - publisher's policy
DC voltage droop control is seen as the preferred control structure for primary voltage control of future multi-terminal 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.
CitationThams, F., Eduardo Prieto-Araujo, Chatzivasileiadis, S., Eriksson, R., Gomis-Bellmunt, O. Disturbance attenuation of DC voltage droop control structures in a multi-terminal HVDC grid. A: IEEE PES PowerTech Conference. "2017 IEEE Manchester PowerTech: Manchester, UK: June 18-22". Institute of Electrical and Electronics Engineers (IEEE), 2017, p. 7981116 (1)-7981116 (6).