n view of the operating characteristics of PET when the AC grid voltage sags, this paper proposes a LVRT strategy for bidirectional PET. During the voltage drop, the injected reactive power is automatically adjusted according to the positive sequence voltage drop to assist the grid voltage recovery. According to the active power of PET before the voltage sag, the level and direction of the active power are maintained as far as possible without exceeding the current limit to reduce the disturbance to the AC/DC grids. In the case of asymmetric voltage drop, the negative sequence current suppression is regarded as the supplementary method to ensure the symmetry of the injected grid current. Finally, the effectiveness of the proposed LVRT strategy is verified by the case study.