Adaptive control and correction method for electronic transformer in digital substation

The invention discloses an adaptive control and correction method for an electronic transformer in a digital substation. The adaptive control and correction method comprises an MMC basic control strategy, a voltage compensation control strategy and an electronic transformer data correction method. The MMC basic control comprises MCC voltage outer loop control and MCC current inner loop control. According to the PET adaptive control strategy provided by the invention, voltage/current double-loop control is adopted, an outer voltage loop can improve the waveform of the output voltage and improve the output precision, a PR controller is adopted as a controller, and compared with a PI controller, the structure of a control loop of the PR controller is simpler, and the calculated amount of the system is reduced; a current inner loop adopts a P controller, so that the system obtains better dynamic response performance, and a low-frequency control method is added, so that the device normally operates under the low-f