Abstract: With the improvement of power quality requirements, the construction of large numbers of intelligent substations and the continuous improvement of the integrated function of regulation and control, telecontrol communication plays an important role in power system, which is the basis for ensuring the safe and stable operation of power system, the Monitoring, analysis, judgment and decision-making of four-remote information are carried out by the Control Center through the power dispatching automation system, and the accuracy and reliability of the telecontrol communication quality, it plays an important role in the safe and stable operation of power system.