In the conventional voltage stability control scheme of the dual three-phase permanent magnet synchronous generator, load changes cause large voltage changes, which is not acceptable. There are two existing methods (load current feedforward and capacitor energy PI control) to improve the dynamic response of the control system. However, Load current feedforward method produces large overshoots when the load is reduced, and the improvement effect of the capacitor energy storage PI control is relatively small. This paper first compares the performances of the existing methods and then proposes a capacitor current compensation method which is effective and easy to implement. The novel method calculates capacitor current by DC bus voltage, and compensates to q-axis current command. The proposed method is effective in reducing voltage variations and improving the system’s immunity to disturbances without overshooting. Simulations validate the effectiveness of the proposed schemes in this paper.