Substation relay protection virtual terminal configuration-free method and relay protection device

The invention discloses a transformer substation relay protection virtual terminal configuration-free method and a relay protection device, and belongs to the technical field of intelligent transformer substation relay protection virtual terminals. An existing intelligent substation project relay protection virtual terminal depends on a system configuration file to carry out association configuration, which causes the problem that the intelligent substation relay protection operation and maintenance condition experience is poor. According to the configuration-free method for the relay protection virtual terminals of the intelligent substation, by splitting and standardizing the output message content of the relay protection device, the intelligent terminal, the merging unit and other devices, communication link parameter setting of the devices is increased, and virtual terminal association between relay protection devices is automatically achieved; the problem that relay protection debugging operation and mai