Abstract: In order to solve the problems of mechanical, inefficiency, and short transmission distance of the traditional fire protection of the data center in the multi-station integrated substation, a data center intelligent fire protection linkage system based on LoRa wireless transmission is designed. The system uses sensors to detect smoke, temperature, and voltage to achieve a multi-parameter detection system. It uses LoRa long-distance wireless transmission to transmit the processing data of multiple detection terminal nodes to the fire monitoring terminal, and judges the real-time status of the data center through the threshold comparison method to link the fire protection of each area to complete the coordinated fire extinguishing. The experimental results show that the detection terminal responds in 5 s to information and the fire extinguishing relay responds in 0.5 s, which is of big improvement as the traditional water mist system's response time is less than 60 s. The system can accurately display the location of the fire on the monitoring screen, and the fire extinguishing effect is good without re-ignition.

Key words: multi-station integration, data center, LoRa wireless communication, fire protection linkage