Abstract: Cascaded operation of voltage-controlled voltage-source converters (VVSCs) and current-controlled voltage-source converters are widely used in off-grid microgrids. Aiming at the maximum limit of the active current of the VVSC and the current-controlled converter, it has been proved that when the output current of the cascaded system reaches the maximum limit, the system will lose stability restricting the output power of the cascaded system. The theoretical value of the current limit is difficult to be derived from the impedance stability criterion due to the high-order characteristics of the system. Therefore, the consistency between the impedance stability criterion and the complex torque coefficient method has been analyzed and verified in this paper. Based on the complex torque coefficient analysis method, this paper derived the theoretical value of the maximum limit of the active current transmission which includes the current limits of the cascaded VVSC and current-controlled inverter and the cascaded VVSC and current-controlled rectifier. The impacts of controller parameters on the current limits have been analyzed, and it has been proved that adjusting the controller parameters cannot effectively force the output current of the cascaded system to break through the maximum limit. Therefore, considering the overload-current-limiting of the VVSC, an improved voltage control method is proposed, which can significantly improve the active current transmission. Finally, simulation and experimental results verify the correctness of the research results and the effectiveness of the proposed voltage control method.