A new approach was presented in the present paper concerning how to connect to the computer network the existing multiple independent microcomputer line protection experiment platform based on Visual Basic with the help of certain software and hardware design.In the pre-set monitoring software environment

by making full use of computer data processing and data storage capacity

a network of relay rooms was established

four remote functions realized

and a bridge built between the power system and the experimental devices.It was realized through such a method the simulation of a real-time control of substation automation system in the laboratory.