Online monitoring system and method for oil-immersed current transformer

The invention belongs to the field of power transmission line monitoring, and particularly relates to an on-line monitoring system and method for an oil-immersed current transformer, and the monitoring method specifically employs a sensor system of the oil-immersed current transformer, and measures the temperature, pressure and height parameters of oil in the oil-immersed current transformer through a sensor. The parameters are transmitted to the fusion system; secondly, a fusion system is designed to carry out fusion analysis on data measured by the sensor; and thirdly, comparing a numerical value output by the fusion system with a set value so as to judge whether the operation state of the oil-immersed current transformer is abnormal or not, and outputting the abnormal operation state through a wireless transmission device. According to the technical scheme, real-time monitoring, real-time fault early warning and fault processing of the oil-immersed current transformer can be achieved, the operation stabili