Intelligent online monitoring system and method for oil level of oil conservator of transformer body

The invention discloses an intelligent online monitoring system and method for the oil level of an oil conservator of a transformer body. The system comprises a pressure oil level transmitter, a signal isolation device, and a wireless signal receiving and transmitting device. The pressure oil level transmitter is arranged in an oil filling and discharging pipeline connected with an oil oil conservator of the transformer body, is always located in the position of the detected lowest oil level, and is used for detecting the oil quantity of the transformer in the transformer oil conservator, converting an oil level pressure signal into an electric signal and outputting the electric signal to the signal isolation device; the signal isolation device is used for modulating and converting the electric signal input by the pressure oil level transmitter through a semiconductor device, carrying out isolation conversion, then carrying out demodulation conversion, and forwards transmitting an original signal before isola