SUPPRESSING OF TRANSIENT ELECTROMAGNETIC INTERRERENCE FOR INTEGRATED EQUIPMENT OF MERGING UNIT AND INTELLIGENT TERMINAL USED IN INTELLIGENT HIGH VOLTAGE ELECTRICAL APPARATUS

IEC61850 standard is the basic communication specification of intelligent high-voltage electrical apparatus, and now, some integrated equipments of merging unit and intelligent terminal have been developed in China. But, there are some problems of transient electromagnetic interference when electromagnetic compatibility tests are carried out to these equipments. Based on these problems, this paper focus on the analysis of the characteristics of electrical fast transient burst (EFT), Surge and electrostatic discharge (ESD), and then, the author gives methods to suppress the transient electromagnetic interference produced by the integrated equipments of merging unit and intelligent terminal. On the one side, suppression of the electronic components, such as using capacitor, magnetic bead,…