In order to make the transformer protection outdoor installation

an implementation scheme of distributed transformer protection is proposed. Distributed sub protection machines

which transfer data between each other through the high-availability seamless redundancy(HSR)bidirectional ring network

are installed for each switch of transformer. The high-voltage side sub machine integrates the main and backup protection function. After an analysis of the overall scheme

focus is on the key technologies of the ring network communication and sampling synchronization. Theoretical analysis and experimental data show that

compared with the existing centralized transformer protection device

the distributed transformer protection has definite advantages in terms of reliability and rapidity.