Large-scale PV generation connected to the interconnection area by a Voltage Source Converter Based High Voltage Direct Current (VSC-HVDC) leads to an insufficient frequency regulation capability of the system. To tackle this, a virtual inertia control strategy of PV generation, one which adopts artificial coupling receiving end power network frequency, is put forward. This can accomplish the participation of PV generation in the frequency regulation of the receiving end power network actively. Then a frequency response model of the power system, including PV generation and VSC-HVDC, is established. This paper analyzes the influence of different control parameters on the dynamic frequency characteristics of the receiving end power network and its variation rule. The small signal stability of the system with different control parameters is also analyzed. A simulation model is established in EMTDC/PSCAD to verify the feasibility of the control strategy and that there is improvement of frequency dynamic characteristics. This work is supported by the National Natural Science Foundation of China (No. 51307059).