Method for calculating short-circuit current of doubly-fed wind power plant based on simplified equivalent model

The invention discloses a method for calculating short-circuit current of a doubly-fed wind power plant based on a simplified equivalent model. The method comprises the following steps: acquiring parameter data of the doubly-fed wind power plant and a power system; calculating an initial equivalent model parameter and an equivalent model voltage segment value according to the obtained parameter data; calculating the voltage of each node of the system by using initial equivalent model parameters; correcting the initial equivalent model by utilizing voltage calculation results of all nodes of the system; calculating a short-circuit current according to the corrected equivalent model; according to the output characteristics of different reactive power distribution modes during low voltage ride through, the doubly-fed wind power plant is equivalent to combinations of different constant current sources and impedances, so that the problems of low calculation efficiency of a controlled current source model and inacc