An online monitoring system of geomagnetically induced current in power grid

Wang Y., Liu C., Liu L., Yan Y.
North China Electric Power University, Beijing 102206, China; Northwest China Grid Company and Limited, Xi'an 710048, China

Abstract: Strong magnetic storms can lead to the geomagnetically induced current (GIC) in power transmission lines with a frequency range from 0.0001 Hz to 0.01 Hz. GIC is characterized by happening at random and usually lasting from several minutes to several hours. Based on an analysis of the characteristics and influence of GIC in China's power grids, the proposal for building a GIC monitoring network system for the power grid is made. The method of extracting the grid GIC signal and the digital signal processing algorithm are given. The monitoring device has been developed. Tests and actual application show that the monitoring device can accurately measure the quasi-direct current and stochastic signal GIC, with few data to process and memory space to save. © 2009 State Grid Electric Power Research Institute Press.
Author Keywords: Design of hardware and software; Geomagnetic storm; Geomagnetically induced current (GIC) monitoring; Hall sensor

Year: 2009
Source title: Dianli Xitong Zidonghua/Automation of Electric Power Systems
Volume: 33
Issue: 15
Page : 112-115
Cited by: 2
Link: Scorpus Link
Document Type: Article
Source: Scopus
Authors with affiliations:

1. Wang, Y., North China Electric Power University, Beijing 102206, China
2. Liu, C., North China Electric Power University, Beijing 102206, China
3. Liu, L., North China Electric Power University, Beijing 102206, China
4. Yan, Y., Northwest China Grid Company and Limited, Xi'an 710048, China

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