To achieve dynamic voltage restorer (DVR) compensation for amplitude and phase of the sag voltage,reduced energy loss and extend compensation time to minimize the impact of sag voltage on the load. In this paper, a comprehensive energy optimal compensation strategy is proposed. Firstly, the process of integrated energy optimal compensation is analyzed. The compensation phasor diagram and analytical formula are obtained, and the compensation limit problem of the strategy is discussed. Secondly, the mathematical relationship and correlation curve between the compensation voltage, the output active power and the relevant physical quantities are analyzed to obtain the optimal compensation conditions. Finally, Matlab/Simulink simulation experiments is performed to analyze the compensation effect of different voltage sags. The simulation results verify the effectiveness of the compensation strategy.