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Statistics and distribution characteristics analysis of time interval of blackout in Chinese power grid

To study the complex dynamic characteristics of blackouts in Chinese power grid, the distribution characteristics of time intervals of blackouts in Chinese power grid are researched. Firstly, the time intervals of blackouts in Chinese power grid from 1981–2014 are analyzed by statistical analysis and normality test. It is proved that the time intervals of blackouts in Chinese power grid approximately satisfies the power-law distribution. Secondly, utilizing the V/S method, the correlation of time intervals of blackouts in Chinese power grid is researched. It is proved that the time intervals of blackouts in Chinese power grid have the strong positive correlation and self-similarity on long time scale. Finally, the significance of distribution characteristics of time intervals of blackouts in Chinese power grid is given.