Electromagnetic voltage transformer neutral point inrush current suppression method

The invention discloses a neutral point inrush current suppression method for an electromagnetic voltage transformer, and belongs to the technical field of excitation inrush current limiting methods. The method comprises the following steps: S1, dividing an electromagnetic voltage transformer based on a YNy0 connection method into a neutral point ungrounded system and a neutral point grounded system; s2, aiming at a neutral point ungrounded system, analyzing a three-phase simultaneous closing strategy and a voltage transformer neutral point excitation surge current condition under a strategy of closing two phases first and then closing a third phase; s3, aiming at the neutral point grounding system, analyzing the excitation surge current condition of the neutral point of the voltage transformer under the sequential closing strategy; s4, summarizing and concluding the change rule of the closing magnetic flux by combining the analysis results in S2 and S3; s5, based on the rule obtained in the S4, establishing