To reveal the internal dynamics mechanism of blackouts in Chinese power grid from the macro and global perspective

the correlation of blackouts in Chinese power grid is analyzed. Firstly

based on the relative value and the R/S method

the power loss correlation of blackouts in Chinese power grid from 1981 to 2014 is researched. It is proved that the power losses of blackouts in Chinese power grid have the strong long-range correlation

to determine the direction of correlation

and to effectively measure the degree of correlation according to the Hurst exponent. Secondly

over time

the change of the power loss correlation of blackouts in Chinese power grid is analyzed. It is revealed that the positive correlation is becoming stronger while the degree of correlation is becoming higher than the power losses of blackouts in Chinese power grid. Finally

on the macro level

the trend of the absolute value continues to be increase and relative value continues to be decrease for the power losses of large blackouts in Chinese power grid in the next few years can be predicted.