Solid state switches for applications at medium- and high-voltage-level

In this article applications of solid state switches at medium- and high-voltage-level are presented. The switches have been developed to excite grid connection point with pulsed current signals in order to identify the frequency characteristic of the internal network impedance. Further on these switches can be used as switching nodes to change different grid structures as well as remote controlled load switches within a smart grid. Both switches are designed to control DC voltages. With modification however for example in an anti-serial setup they can also be applied at AC power grids.

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