In order to give full play to the large capacity of SSTS and the rapid response of DVR,a single-phase voltage sag detection method based on single-phase dq transform and morphological filter is presented in this paper.The DVR and the SSTS coordinated control method are combined with the DVR and the SSTS to achieve the coordinated action of the DVR and the SSTS,thus ensuring the continuous high quality power supply of the sensitive load.The simulation model based on Matlab/Simulink verifies the correctness and validity of the proposed control strategy.