Aiming at the problems of speed

reliability

operation and maintenance in the actual application of line protection in the conventional and intelligent substation

the system architecture and technical scheme of outdoor installation line protection based on vertical integration and outdoor installation are proposed. The functions of single-bay merging unit

relay protection

intelligent terminal are vertically integrated to reduce installation amounts and varieties

simplify configuration

reduce signal transmission

and shorten the protection action time. Furthermore

this vertically integrated device is applied to provide data acquisition and control execution support to substation-area protection

security and stability device and other substation-area installations. In addition

the key techniques of outdoor installation line protection

such as synchronous sampling between substations

power-on remote control and synchronous voltage input

are researched and analyzed. The vital performances are tested and compared. Finally

the scheme is verified to be feasible and advanced through experimental results. This work is supported by State Grid Corporation of China.