A New Droop Coefficient Design Method for Accurate Power-Sharing in VSC-MTDC Systems

Publication Type:
Journal Article
Citation:
IEEE Access, 2019, 7 pp. 47605 - 47614
Issue Date:
2019-01-01
Full metadata record
© 2013 IEEE. This paper proposes a new droop coefficient design method with the aim of improving the power-sharing accuracy among the converters in a multi-terminal dc (MTDC) system. The proposed droop coefficient design method works by adjusting the droop coefficient and can realize an arbitrary power-sharing ratio among all the converters in an MTDC system. This method does not rely on a communication network and therefore has the potential for higher reliability than the alternative methods. Mitigating the impact of the variation of dc line resistances on the power-sharing is discussed. Simulation of a four-terminal MTDC system is carried out by using PSCAD/EMTDC. The experimental results under a scaled-down four-terminal dc grid platform demonstrate the effectiveness of the proposed method.
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