Rail transit train converter heat dissipation state monitoring method and system

The invention discloses a rail transit train converter heat dissipation state monitoring method and system, and the method comprises the steps: taking the traction power and environment temperature of a train under a plurality of operation conditions as sample data, inputting the sample data into a neural network model for network training, and obtaining a trained network model; inputting the traction power of the train under the normal working condition and the environment temperature into the trained network model, and outputting a dynamic temperature curve lh of the converter under the normal heat dissipation state; measuring a dynamic temperature curve l of the converter in an actual heat dissipation state; calculating a difference D1 between the dynamic temperature curve lh and the dynamic temperature curve l, and calculating a difference D2 between the dynamic temperature curve lh and the dynamic temperature curve lf; and comparing the difference D1 with the difference D2 to obtain a comparison result,