Abstract:

This paper analyzed the resistance characteristics of alternating current sampling circuit of protective control device in intelligent substation and proposed the contact resistance model of alternating current sampling circuit. Firstly, this paper built a simulation model of contact resistance of alternating current sampling circuit using the Matlab Simulink software. Then it analyzed the influence of contact resistance variation on signal transmission and verified it by simulation through adjusting the resistance parameters among terminals. At last, it proposed some reasonable suggestions to preventing the contact defaults of connector.

Key words:

connector, contact resistance, alternating current sampling, protective device, intelligent substation