Test-based equivalent modeling method for electric element comprising converter

The invention discloses a test-based equivalent modeling method for an electric element comprising a converter. The method comprises steps as follows: an index system for measuring fault response of a controlled variable is established in the electric element comprising the converter, and the fault response of the controlled variable is described by an index; test data are obtained through a fault test, a relation between the index and residual voltage at an outlet of the electric element is fitted according to the test data, and then a relation between the fault response of the controlled variable and the residual voltage is obtained; a relation between output of the electric element and the residual voltage is obtained according to a physical relation between the controlled variable and the output of the electric element, and accordingly, a simplified model equivalent to a detailed model in the aspect of external characteristics is obtained. The method is applicable to electromagnetic transient simulation analysis on an electric system comprising a large-scale converter.