Method, device and system for monitoring concentration of dissolved gas in transformer oil

The invention provides a method, device and system for monitoring the concentration of dissolved gas in transformer oil, and the method comprises the steps: obtaining initial model parameters of a gas detection model through employing a firefly algorithm, and carrying out the model training of the gas detection model based on the initial model parameters and a sample training set, obtaining the trained gas detection model; acquiring a gas concentration characteristic value of at least one gas of dissolved gases in the transformer oil detected by a gas concentration characteristic value detection system in real time; and performing real-time monitoring on the liquid-phase gas concentration of the dissolved gas in the transformer oil by using a trained gas detection model according to the gas concentration characteristic value. The cross interference of the dissolved gas in the transformer oil can be avoided, and the calculation complexity of the concentration of the dissolved gas in the transformer oil is redu