Spatial-Temporal Characteristics of 500 kV Transmission Line Fault

doi:10.3969/j.issn.1000-7229.2015.06.008

Abstract

Abstract:

With the development of power system communication automation, various kinds of information collection systems have been widely used, which is beneficial to analyze the spatial-temporal characteristics of power grid faults. Taking 500 kV transmission network in H province as example, this paper researched the long-time behavior characteristics of 500 kV transmission line faults in recent 5 years. Firstly, on the time series level of transmission line fault, statistical analysis was carried out on the interrelation between fault timing (unit: day) and fault cumulative frequency and probability under same time point. Kolmogorov-Smirnov (K-S) method was adopted to testify the normality of the distribution, and Hurst exponent based on time series of 500 kV transmission network in H province during 5 years was calculated according to R/S time series analysis. Thereby the long-term correlation under time series was estimated. Then, on the level of space, statistical analysis was carried out on the interrelation between fault times of each 500 kV transmission line in H province during 5 years and its fault cumulative frequency and probability, and it was proved that transmission line faults coincided with power-law distribution characteristic. The research on the spatial-temporal distribution characteristics can provide the basis of assistant decision for the risk management and prediction of power system.

Key words: transmission line fault, spatial-temporal distribution, power-law distribution, Hurst exponent, R/S analysis method

CLC Number:

TM 711

LUO Jie，JIANG Tiezheng，LIANG Yongchao，MA Rui. Spatial-Temporal Characteristics of 500 kV Transmission Line Fault[J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(6): 46-52.

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