Power transmission circuit current state on-line monitoring system and method

The invention discloses a power transmission circuit current state on-line monitoring system and a method. The power transmission circuit current state on-line monitoring system comprises a control center, a data transmission terminal and a monitoring terminal; the data transmission terminal is in wireless communication with the control center and the monitoring terminal; the monitoring terminal successively comprises a current data collection unit, a full wave precision rectification unit, two-order low pass filtering unit, a sampling maintaining unit, a difference amplification detection unit, an MCU processing unit and a wireless radiation communication unit. The power transmission circuit current state on-line monitoring system can directly monitor the operation state of the lead and can improve the accuracy and instantaneity.