Impacts of geomagnetic storms on EHV and UHV power grids

AbstractWe need a typical method of directly measuring geomagnetically induced current (GIC) to compare data for estimating a potential risk of power grids caused by GIC. Here, we overview GIC measurement systems that have appeared in published papers, note necessary requirements, report on our equipment, and show several examples of our measurements in substations around Tokyo, Japan. Although they are located at middle latitudes, GICs associated with various geomagnetic disturbances are observed, such as storm sudden commencements (SSCs) or sudden impulses (SIs) caused by interplanetary shocks, geomagnetic storms including a storm caused by abrupt southward turning of strong interplanetary magnetic field (IMF) associated with a magnetic cloud, bay disturbances caused by high-latitude aurora activities, and geomagnetic variation caused by a solar flare called the solar flare effect (SFE). All these results suggest that GIC at middle latitudes is sensitive to the magnetospheric current (the magnetopause current, the ring current, and the field-aligned current) and also the ionospheric current.

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A technique for calculating the currents induced by geomagnetic storms on large high voltage power grids

2012 IEEE International Symposium on Electromagnetic Compatibility ◽

10.1109/isemc.2012.6351828 ◽

2012 ◽

Cited By ~ 6

Author(s):

J. L. Gilbert ◽

W. A. Radasky ◽

E. B. Savage

Keyword(s):

High Voltage ◽

Geomagnetic Storms ◽

Power Grids

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From solar eruption to transformer saturation: the space weather chain

Proceedings of the International Astronomical Union ◽

10.1017/s1743921313011733 ◽

2013 ◽

Vol 8 (S300) ◽

pp. 500-501

Author(s):

Larisa Trichtchenko

Keyword(s):

Space Weather ◽

Geomagnetic Field ◽

Geomagnetic Storms ◽

Interplanetary Medium ◽

Practical Importance ◽

Power Grids ◽

Geomagnetically Induced Currents ◽

Large Space ◽

Weather Events ◽

Induced Currents

AbstractCoronal mass ejections (CME) and associated interplanetary-propagated solar wind disturbances are the established causes of the geomagnetic storms which, in turn, create the most hazardous impacts on power grids. These impacts are due to the large geomagnetically induced currents (GIC) associated with variations of geomagnetic field during storms, which, flowing through the transformer windings, cause extra magnetisation. That can lead to transformer saturation and, in extreme cases, can result in power blackouts. Thus, it is of practical importance to study the solar causes of the large space weather events. This paper presents the example of the space weather chain for the event of 5-6 November 2001 and a table providing complete overview of the largest solar events during solar cycle 23 with their subsequent effects on interplanetary medium and on the ground. This compact overview can be used as guidance for investigations of the solar causes and their predictions, which has a practical importance in everyday life.

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Geomagnetic storms and their impacts on Ethiopian power grid

Advances in Astronomy and Space Physics ◽

10.17721/2227-1481.10.55-64 ◽

2020 ◽

Vol 10 (2) ◽

pp. 55-64

Author(s):

Gebregiorgis Abraha ◽

Tesfay Yemane ◽

Tsegaye Kassa

Keyword(s):

Magnetic Field ◽

Solar Wind ◽

Geomagnetic Storm ◽

Geomagnetic Storms ◽

Solar Wind Speed ◽

Recovery Period ◽

Power Grids ◽

Storm Events ◽

Earth Magnetic Field ◽

Speed Solar Wind

In present work we analysed eight geomagnetic storm events in 2015/2016 and studied the possible influence of these events on Ethiopian power grids. The results showed that the majority of the forced power outages occurred in the period of the main phase of events and the recovery period of the geomagnetic storms. The geomagnetic storms are characterised by different indices and parameters such as the disturbance storm time (Dst) values, coronal mass ejection (CME) speed, solar wind speed (V sw) and interplanetary magnetic field (IMF-Bz) on the selected dates. In most cases the observed geomagnetic storms were produced by the CME-driven storms as they show a storm sudden commencement (SSCs) before the main storms, and also have the short recovery periods. The sudden jumps of the solar wind velocities and IMF-Bz are also consistent with occurrence of the CMEs. Moreover, this effect can be traced in changes of Earth magnetic field during geomagnetic storm and quiet days. The observed CME-driven storms can produce highly variable magnetic fields on the transformers and provide forced outages, however the studied outages have not been recognised as those one driven by a geomagnetic storm.

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Utilizing magnetotelluric and differential magnetometer measurements for the validation of geomagnetically induced current models in a complex power network

10.5194/egusphere-egu2020-8374 ◽

2020 ◽

Author(s):

Juliane Huebert ◽

Ciaran D. Beggan ◽

Gemma S. Richardson ◽

Alan W.P. Thomson

Keyword(s):

Electric Fields ◽

Geomagnetic Storms ◽

Thin Sheet ◽

Computational Cost ◽

Cost Effective ◽

Power Grids ◽

Impedance Tensor ◽

Geomagnetically Induced Currents ◽

Differential Magnetometer ◽

The Uk

<p>Space weather as a geohazard to modern technological infrastructure has come to the forefront of electromagnetic research in the past years. Geomagnetically induced currents (GICs) are generated by the rapidly changing magnetic fields during geomagnetic storms and sub-storms and the resulting induced electric fields into the ground. GICs can pose great risk to e.g. transformers in HV power grids and their monitoring and modelling is an ongoing effort in many higher and mid-latitude countries. Modelling of GICs in HV power grids requires knowledge about the magnetic field variations, the induced electric field via a conductivity model or through the magnetotelluric (MT) impedance tensor, and a detailed representation of the grid topology.</p><p>In the UK we have traditionally used a thin-sheet model for the calculation of electric fields during storm times due to very limited availability of MT data, but also as a fast and computational cost-effective approach. Using the Differential Magnetometer Method (DMM) in several locations of the grid has enabled us to indirectly measure GICs and validate them against the model. Here we present a case study from a location in Scotland, where we incorporate the different approaches and data sets that combine to a comprehensive analysis of GICs in this subset of the UK power grid.</p>

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The Development of Models for Assessment of the Geomagnetically Induced Currents Impact on Electric Power Grids during Geomagnetic Storms

Advances in Electrical and Computer Engineering ◽

10.4316/aece.2015.01007 ◽

2015 ◽

Vol 15 (1) ◽

pp. 49-54 ◽

Cited By ~ 4

Author(s):

V. V. VAKHNINA ◽

A. A. KUVSHINOV ◽

V. A. SHAPOVALOV ◽

A. N. CHERNENKO ◽

D. A. KRETOV

Keyword(s):

Electric Power ◽

Geomagnetic Storms ◽

Power Grids ◽

Geomagnetically Induced Currents ◽

Induced Currents ◽

Electric Power Grids

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Geomagnetic storms shape airglow

Nature India ◽

10.1038/nindia.2014.34 ◽

2014 ◽

Keyword(s):

Geomagnetic Storms

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Legal Providing of Application of Energy Effective Lightning Technology and Intellectual Networks in the Conditions of Digital Economy

Light & Engineering ◽

10.33383/2018-089 ◽

2019 ◽

pp. 123-128 ◽

Cited By ~ 1

Author(s):

Maksim V. Demchenko ◽

Rostislav O. Ruchkin ◽

Eugenia P. Simaeva

Keyword(s):

Public Relations ◽

New Technologies ◽

Electric Power Industry ◽

Legal Regulation ◽

Power Grids ◽

Smart Power ◽

Smart Power Grids ◽

Russian Economy ◽

Intellectual Networks ◽

Efficient Power

The article substantiates the expediency of improving the legal support for the introduction and use of energy-efficient lighting equipment, as well as smart networks (Smart Grid), taking into account the ongoing digitalization of the Russian economy and electric power industry. The goal of scientific research is formulated, which is to develop practical recommendations on optimization of the public relations legal regulation in the digital power engineering sector. The research methodology is represented by the interaction of the legal and sociological aspects of the scientific methods system. The current regulatory and legal basis for the transformation of digital electricity relations has been determined. The need to modernize the system of the new technologies introduction legal regulation for generation, storage, transmission of energy, intelligent networks, including a riskbased management model, is established. A set of standardsetting measures was proposed to transform the legal regulation of public relations in the field of energyefficient lighting equipment with the aim of creating and effectively operating a single digital environment, both at the Federal and regional levels. A priority is set for the development of “smart” power grids and highly efficient power equipment in the constituent entities of the Russian Federation through a set of legal, economic (financial), edu cational measures.

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