HVDC Transaction station usually equips higher voltage level of ± 100 Mvar STATCOM for higher reliability. Thus, control system needs a faster response to deal with metallic ground fault and other extreme conditions. This paper involves a method which depends on independent phase control (IPC) of direct current control (DCC) and parameter settings for STATCOM under higher voltage. According to Funing to Guangxi Transaction Station of China Southern Power Grid, the control parameters are calculated. RTDS hardware in the loop test verifies the dynamic response of the control strategy and metallic ground fault through. Experimental results indicate that the proposed phase resonant DC current control strategy to meet the engineering needs of STATCOM ± 100 Mvar level voltage. This work is supported by National High-tech R & D Program of China (863 Program) (No. 2012AA050206) and National Natural Science Foundation of China (No. 51567018).