Monitoring system of power transformer

The invention discloses a monitoring system of a power transformer, comprising the power transformer, an operation parameter monitoring unit, a high-voltage signal acquisition unit, an intermediate-voltage signal acquisition unit and a data storage and display unit, wherein the operation parameter monitoring unit is used for adjusting a work signal of the power transformer and figuring out effective information data; the high-voltage signal acquisition unit and the intermediate-voltage signal acquisition unit are used for acquiring high-voltage and intermediate-voltage work signals of the power transformer by various sensors and providing an effective field operation signal of the power transformer for the operation parameter monitoring unit; and the data storage and display unit is used for storing effective data acquired by calculating and processing the work signals of various power transformers through the operation parameter monitoring unit and displaying the effective data in real time. The invention ha