Based on low-voltage warning method set threshold value

The present invention relates to a low-voltage warning Based on the set threshold, and the determination of the urgency and the low voltage model index as the important research, analysis of the actual data distribution by a low voltage, their model setting urgency indicator, to staff provide a reference grid, improve the work efficiency of the grid. Further, also we studied the fluctuation, the voltage fluctuation of voltage of the design calculation, and as a parameter calculating index urgent, urgent practical effect so as to enhance the index. Empirical results show that the model determines the effective design of the present invention, high precision, can be widely used.