Abstract: The penetration of energy storage in distribution networks is increasing, and its switching between charging and discharging modes poses greater challenges for protection. However, there have been few studies on the distribution network protection considering energy storage integration, and on control strategies for energy storage systems after distribution-network faults. Moreover, the existing differential protection is prone to fail when the energy storage system is charged. In view of the above issues, the idea of active injection of current is applied to the protection design, which eliminates the effect of switching the charging and discharging modes of the energy storage system and gives the energy storage distinct and uniform characteristics in case of a fault. A fault-tolerant control strategy for energy storage is proposed. Based on it, a harmonic voltage control link decoupled from its power frequency is added. According to the actively injected high-order harmonic signal, the pilot protection scheme of the distribution network suitable for energy storage access is proposed. Finally, a simulation model is built. The simulation results show that the proposed scheme can operate reliably under different fault conditions and has strong anti-transition resistance ability, can flexibly adapt to the change of distribution network topology and has low communication requirements.