Statistical Analysis of Geomagnetically Induced Currents in UHV Power Grids Under Multiple Geomagnetic Storms

被引：0
|
作者：
Liu C. [1 ]
Wang H. [1 ]
Wang X. [1 ]
机构：
[1] School of Electrical & Electronic Engineering, North China Electric Power University, Changping District, Beijing
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2019年 / 39卷 / 15期
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
100-year value; Geomagnetically induced currents (GIC); Probability distribution; Spatial distribution; Ultra-high-voltage power grid;
D O I：
10.13334/j.0258-8013.pcsee.181558
中图分类号：
学科分类号：
摘要：
Ascertaining the distribution characteristics of disastrous geomagnetically induced currents (GIC) in a power grid is important to accurately evaluate the effects of extreme space weather on power grids. This paper presented the induced geoelectric fields in northern, center and eastern areas of China (Sanhua) and GIC at each substation in the ultra-high-voltage power grid during strong geomagnetic storms selected by the Dst index. The GIC contribution rate P for each substation, the regression coefficient G, and the parameter a of probability distribution were calculated to describe the spatial distribution of GIC in the power grid on the basis of sample data. The probability distribution model of geoelectric fields and GIC in the power grid were determined with reference to the R-squared value (R), and the 100-year GIC values of three-phases in each node were predicted accordingly. The results show that the logarithmic normal distribution and Weibull distribution are suitable probability distribution models for geoelectric field and GIC in the power grid respectively. The results reflect the severity of the damage of power grids by geomagnetic storms which can also provide the basis for controlling and evaluating the effects of GIC on a power grid. © 2019 Chin. Soc. for Elec. Eng.
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收藏
页码：4606 / 4614
页数：8
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