Load transfer capabilities of GIS disconnectors for DC grids

The paper focuses on the role of disconnectors for load transfer duties in the operation of MTDC meshed grids. As there are no topology existing today and no standard, some switching duties are presented for which disconnectors could act instead of using circuit breaker. Based on an empirical model relying on tests performed in air, severity of the different switching duties are presented and first conclusions are proposed.

Keywords: DC Grids; Switching; Disconnector; Bus transfer; Load transfer