A kind of improved compensation strategy for network side voltage drop of industrial distribution network system is studied with purpose of improving the voltage quality of sensitive load side. On the basis of analyzing traditional advanced predicting compensation strategy. The voltage amplitude and phase after the drop are predicted and stored by way of injecting one high active power by DVR at initial moment

then are operated at minimum active power mode by way of a transient optimization search process

thus broadening the maximum compensation time. The maximum compensation time

compared to the advanced predicted compensation method and at the condition of 50% drop depth can improve above2 times. The feasibility and effectiveness of the proposed method is verified by the experimental result.The dynamic restoration of DC voltage can be achieved with the drop depth no more than its maximum limit and therefore its ability to resist the secondary fault shock of the system is enhanced.