Study on the Matching of Solid State Power Controller in Cascade Application

In view of the mismatch of the protection characteristics between the SSPC(solid-state power controller)and the cascade application of the fuse in the process of power distribution and use of the spacecraft, this paper analyzes the working principle and protection characteristics of the solid-state power controller. In this paper, the working principle and protection characteristics of the solid state power controller are studied theoretically. The use principle of the space fuse and the breaking characteristics of the parallel application are analyzed. A new method is presented, which combines the inverse time curve key parameter programming of the solid state power controller with the adjustment of the circuit threshold immediately, to solve the flexible matching problem of the protection characteristics when the fuse is cascaded. Finally, the theoretical calculation basis and the principle of safety and reliability evaluation are given, and the feasibility of this method is further verified by experimental verification. It is of great reference significance for the combination of the space distribution management solid state power controller and the fuse.