Direct-current voltage transformer step response parameter segmented extraction method and related equipment

The embodiment of the invention discloses a step response parameter segmented extraction method for a direct-current voltage transformer and related equipment, and the method comprises the steps: obtaining a step waveform applied to the direct-current voltage transformer, and extracting a step voltage signal of the step waveform; decomposing the step voltage signal based on a preset decomposition model to obtain a high-frequency component signal and a residual component; detecting the signal variation amplitude of the high-frequency component signal to obtain a time sequence abrupt change point of the step voltage signal; selecting a data time window for calculating a step steady-state value based on the time sequence abrupt change point; and calculating performance parameters of the DC voltage transformer according to the data time window. The step waveform applied to the direct-current voltage transformer is used for calculating the performance parameters of the direct-current voltage transformer, and the p