Monitoring system of power transformer

The utility model discloses monitoring system of a power transformer, which comprises a power transformer, an operational parameter monitoring unit, a high-voltage signal acquisition unit, a medium-voltage signal acquisition unit and a data storage and display unit, wherein the operational parameter monitoring unit is used for adjusting working signal of the power transformer and figuring out effective information data; the high-voltage signal acquisition unit and the medium-voltage signal acquisition unit are used for acquiring high-voltage working signals and medium-voltage working signals of the power transformer through various sensors and providing valid field operation signals of the power transformer for the operational parameter monitoring unit; and the data storage and display unit is used for storing calculated and processed valid data of various working signals of the power transformer by the operational parameter monitoring unit and performing real-time display. The monitoring system has abundant