Abstract: The torsional vibration will cause early failure of drive train components, which is very detrimental to the reliability and availability of wind energy conversion systems (WECS). The impacts of drive train physical parameters on broadband forced torsional vibration are analyzed based on the closed loop transfer function. It shows that a larger moment of inertia of the wind turbine or a smaller moment of inertia of the generator helps to reduce torsional vibration; and particularly, if and only if the moment of inertia of the generator is zero, torsional vibration is the lowest. Focusing on the drive train, the generator torque is divided into the electrical damping component and the electrical inertia component. The compatibility of the two on the suppression of torsional vibration is analyzed, and the combined virtual configuration strategy of electrical inertia and electrical damping is proposed. The correctness of the theoretical analysis and the validity of the control strategy is verified in the hardware-in-loop simulation based on GH Bladed. The results show that the proposed control can significantly reduce the torsional vibration and fatigue damage caused by continuous wind speed disturbance, and can slightly improve the power production.