System and method for on-line detection and fault location of circulation parameters of power transmission cable

The invention provides a system and method for on-line detection and fault location of circulation parameters of power transmission cable. The system comprises a plurality of parameter online detection devices and a background monitoring unit, each parameter online detection device comprises a parameter acquisition unit, a data processing A/D unit, a central processor, an alarm unit and a GPRS communication unit, the parameter acquisition unit acquires operation parameters of a power transmission cable sheath, the data processing A/D unit converts the operation parameters into digital signals, and when the numerical value of the digital signals exceeds a preset threshold value, the central processor starts the alarm unit to carry out position warning and uploads the digital signals to the background monitoring unit through the GPRS communication unit, and the background monitoring unit locates a fault point according to the uploaded digital signal. The system and the method are high in universality, simple in