With the penetration level of large-scale grid-connected wind farms increasing year by year，low voltage ride through（LVRT）capability is required by many countries for power quality and fail-safe operation of grid faults.A new dynamic strategy using dynamic voltage restorer（DVR）is proposed to improve LVRT capability of wind turbine generators（WTGs）.During the voltage dip，DVR will be connected in series between grid and the generator by opening the static switch cabinet.And the power balance between grid and generator is achieved by using the dynamic braking resistor of DVR.In order to increase the response speed of DVR，anti-voltage technology is used to make the thyristor control rectifier in static switch cabinet shutting off immediately.PSCAD/EMTDC simulations and experiments are carried out to prove the effectiveness of the proposed technique.