In order to realize low voltage ride through (LVRT) by controlling the power conversion system (PCS) of the energy storage device in the situation of both the balance and unbalance grid voltage fault, considering the shortage of power conversion system (PCS), and by analyzing the predictive current control principle, this paper derives PCS instantaneous power equation in α-β coordinate system and designs a strategy to realize LVRT fault control. Then it builds a single battery module (84 kW) control system based on the PSCAD to simulate multiple types of grid fault. After the existing control strategy is simulated and verified by the software simulation, the strategy is transplanted to the hardware facilities in the experiment. The results show that this control strategy can effectively achieve the LVRT function in the energy storage system.