Abstract: To solve the problems of long bus voltage recovery time and large voltage fluctuation in the traditional voltage and power double closed loop control when the mutational load is applied to the rectifier system of dual three-phase permanent magnet generator, a fast voltage regulation control method of dual three-phase permanent magnet generator with direct power calculation is proposed. Firstly, on the voltage outer loop, the method of direct power calculation is used to obtain the fast adjustment component of the system inner loop power reference value to improve the dynamic performance of the bus voltage. Secondly, due to the control error caused by the system loss, the capacitor power compensation is used to obtain the error compensation component of the power reference value to improve the control accuracy of the bus voltage. Finally, the feasibility and effectiveness of the control strategy proposed are proved by software simulation and experiment. Compared with the traditional control method, the proposed method has stronger anti-load disturbance ability and faster dynamic response, which is helpful to realize the high performance control of the DC bus voltage of the dual three-phase permanent magnet generator system.