With the development of the power grid in recent years, a lot of advanced technology and equipment have been applied in the power system, which greatly improves the automation level of the power system. However, such electric and electrical equipment units, relay protection devices, control devices and communication technology are affected by electromagnetic interference in running when applied in the power system, thus affecting the stability of the power system. To solve this problem, the electromagnetic compatibility (EMC) technology has been gradually developed. This paper mainly analyzes the electromagnetic interference sources of the electric power system automation equipment as well as EMC design of shielding technology, grounding technology and filter technology and the specific application of EMC and its technology in the electric power system automation equipment.
