With the continuous improvement of the voltage level and transmission capacity in voltage source converter-high voltage DC(VSC-HVDC), the VSC-HVDC transmission technology using voltage source converters has been widely used in China, and its impact on the power grid is further enhanced. Firstly, based on a newly developed VSC-HVDC control system which takes into account fault crossing strategy in the electromechanical transient simulation program PSD-BPA, the differences of disturbance recovery characteristics of weak receiving-end power grid under different HVDC interconnection schemes are compared. On this basis, the influence of VSC-HVDC control mode, transmission power and fault traversal control strategy on dynamic active and reactive power characteristics of converter station is studied. Finally, an optimization scheme is proposed to solve the voltage stability problem of Tibet weak receiving-end power grid. The simulation results show that optimizing the key parameters of VSC-HVDC fault traversal control can improve the recovery performance of weak receiving-end grid after fault.