Research on Prediction of Inlet Valve Water Temperature in Flexible DC Valve Cooling System Based on VMD-DF

To achieve intelligent prediction of the inlet water temperature of the flexible DC converter valve cooling system, a prediction model combining VMD and DF algorithm is proposed. Firstly, the inlet water temperature signal is collected and processed. Then, it is decomposed by VMD to obtain multiple modal components and residual signals. Secondly, the improved DF algorithm is used to predict the decomposed subsignals and residual signals. Finally, all the prediction results are superimposed and reconstructed. The experimental results show that the proposed method has significantly reduced prediction error and is superior to the current mainstream models.