The virtual synchronous control strategy for the doubly-fed induction generator(DFIG)is a promising control technique to provide inertial frequency and voltage support when DFIG is integrated to the power grid. However

the existing virtual synchronous control strategy for DFIG mainly focuses on mimicking the electromechanical dynamic behavior of the synchronous generator

while neglecting the electromagnetic transient responses of DFIG. Firstly

the electromagnetic transient characteristics of virtual synchronous control-based DFIG during symmetrical grid faults are analyzed. Two severe flaws of existing virtual synchronous control strategy are revealed

that is

the incapability of fully imitating the transient characteristics of synchronous generators

or limiting the overcurrent in DFIG rotor. Then

a transient voltage compensation virtual synchronous control strategy for DFIG is proposed. The main principle is compensating for the transient component of the control voltage of rotor side converter to weaken the influence of transient electromotive force in rotor windings to suppress the overcurrent in DFIG rotor. Finally

a simulation analysis is made to compare the performances of existing and proposed virtual synchronous control strategies to show that the proposed virtual synchronous control strategy can not only enhance the advantage of providing inertial support

but also effectively limit the overcurrent in DFIG rotor and the oscillations of electromagnetic torque

with the capability to offer reactive power support to power grid. All of these improve the possibility for DFIG to implement fault ride through and the ability of power system to recover from grid faults.