Study on the laying of protection and control equipments in the 500 kV substation

A scheme for the laying of protection and control equipments in the 500 kV substation is presented, with technical and economical comparison,through three different schemes (laying in small special rooms in the electric field,laying in panels in the electric field and laying in panels in the control building).The measures to decrease electromagnetic interference after those protection and control equipments were locally mounted are put forward.