It is becoming a new trend for relay protection equipment of the 750kV substation to be installed in the switch yard.However,the disperse arrangement of the secondary equipment in the HV distribution equipment area will cause electromagnetic interference.This essay studies the features of the transient interference source in the distribution equipment area,the coupling mechanism of the electromagnetic interference and the anti-interference function of the secondary equipment.%针对750kV变电站继电保护设备直接安装在开关场地中,使二次设备分散布置在高压配电装置区受到电磁干扰的问题,研究配电装置区内瞬态干扰源的特性,电磁干扰的耦合机理,二次设备的抗干扰性能。
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