Feasibility Study of a Superconducting Power Filter for HVDC grids

A new application of high temperature superconducting technology for HVDC grids is introduced. The device referred to as “superconducting power filter” (ScPF) aims at increasing the stability of HVDC grids by adding a current-dependent resistance to the grid. In comparison with other stabilization techniques, a ScPF achieves a fully passive stabilization with virtually no losses in nominal operation. To clarify its feasibility for HVDC grids, the CIGRE B4 DSC1 benchmark is considered. Using an electrical-thermal model of the device, the stability of the DC grid is numerically assessed. The first steps towards an experimental proof of concept are presented.