An HVDC line parameters estimation method without optimization

•A new HVDC line parameters estimation method without optimization algorithm.•Estimation method resulting from the line frequency response analysis.•Simple algorithm real time implementable.•Resulting model of the HVDC line which retains a physical meaning.

This paper proposes a method to estimate HVDC line parameters. After a reminder on the transfer functions that characterize the dynamic behavior of a DC line, link between these transfer functions resonance frequencies and the line parameters is established. This link is then used to estimate the line parameters, the resonance frequencies being determined using the power spectral density of voltage signals at the input and output of the line. A numerical example highlights the efficiency of the proposed method which is finally reduced to a very simple algorithm. This algorithm does not involve optimization, thereby reducing the calculation time and the resources required for its implementation. This new estimation method can be used for fault detection and location.