Abstract: As the interface between distributed generation systems and the utility grid, the fault ride-through capability of grid-connected inverters directly affects system stability during grid disturbances. To achieve rapid reactive power support and stable operation under voltage sag and swell conditions, a fault ride-through control strategy based on the Current-Mode Pulse Train (CMPT) is proposed. Based on the mathematical model of a three-phase inverter, the reference duty cycle is derived and decomposed into current and voltage components. A voltage fault detection algorithm is developed to monitor the amplitude of the point of common coupling (PCC) voltage in real time, enabling smooth transitions among normal operation, low-voltage ride-through (LVRT), and high-voltage ride-through (HVRT) modes. Complex power calculation modules are not required, and thus the control structure is simplified and the implementation is facilitated. To verify the proposed control principle, the feasibility of the power control method, and the effectiveness under various operating conditions, a three-phase grid-connected inverter simulation platform is established in PLECS. Simulation results show that the proposed method effectively achieves the control objectives of active and reactive currents during fault conditions.