Bracing for the geomagnetic storms

Kappernman, J.G.; Albertson, V. D.

doi:10.1109/6.48847

Cited by 198 publications

(87 citation statements)

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“…An example of a major disruption on high technology operations by magnetic variations of a large extent occurred in March 1989, when an intense geomagnetic storm upset communication systems, orbiting satellites, and electric power systems around the world. Several large power transformers also failed in Canada and the United States, and there were hundred disoperation of relays and protective systems (Kappenman and Albertson, 1990;Hruska and Shea, 1993). Some evidence has been also reported on the association between geomagnetic disturbances and increases in work and traffic accidents (Ptitsyna et al, 1998 and references therein).…”

Section: On the Influence Of Geomagnetic Storms Accompanied By Cosmicmentioning

confidence: 98%

Space weather and dangerous phenomena on the Earth: principles of great geomagnetic storms forcasting by online cosmic ray data

Дорман

2005

Ann. Geophys.

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Abstract. According to NOAA space weather scales, geomagnetic storms of scales G5 (3-h index of geomagnetic activity K p =9), G4 (K p =8) and G3 (K p =7) are dangerous for satellites, aircrafts, and even for technology on the ground (influence on power systems, on spacecraft operations, on HF radio-communications and others). We show on the basis of statistical data, that these geomagnetic storms, mostly accompanied by cosmic ray (CR) Forbush-decreases, are also dangerous for people's health on spacecraft and on the ground (increasing the rate of myocardial infarctions, brain strokes and car accident road traumas). To prevent these serious damages it is very important to forecast dangerous geomagnetic storms. Here we consider the principles of using CR measurements for this aim: to forecast at least 10-15 h before the sudden commencement of great geomagnetic storms accompanied by Forbush-decreases, by using neutron monitor muon telescope worldwide network online hourly data. We show that for this forecast one may use the following features of CR intensity variations connected with geomagnetic storms accompanied by Forbush-decreases: 1) CR pre-increase, 2) CR pre-decrease, 3) CR fluctuations, 4) change in the 3-D CR anisotropy.

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Section: On the Influence Of Geomagnetic Storms Accompanied By Cosmicmentioning

confidence: 98%

Space weather and dangerous phenomena on the Earth: principles of great geomagnetic storms forcasting by online cosmic ray data

Дорман

2005

Ann. Geophys.

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“…This is mainly due to geomagnetic storms, more intense geomagnetic field changes, along with changes in GIC's also more severe; and the HVDC transmission power changes over a period of time remains the same, so monopole operation is generated in the transformer neutral point during this period of little change in the DC current. In addition there are the following differences between them [12]:…”

Section: Analysis For Under Characteristics Of DC Bias Due To Differementioning

confidence: 99%

The Applicability of Governance Method for DC Bias Due to Different Causes

Wu¹,

Guo²,

Liu³

2016

dtetr

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Abstract. DC-bias is one of the important problems in the process of the modern power system development, Which would cause the damage to electrical equipment and even lead to the power system disastrous accidents. DC bias is mainly caused by the solar storm or the DC power transmission system. Firstly, on the basis of analysis of the typical DC bias historical events, the characteristics of DC-bias due to the two causes is researched. Then, the DC bias control method is summarized and classified, and the DC bias governance principles applicability recommendation are proposed. Finally, using the GIC Benchmark model, we calculate the DC current in the neutral point of the substation, and analyze the features govern laws aim at the both causes. At the end of this paper, the unresolved issues and possible research directions is proposed.

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“…The complex interactions between these ionized particles and the geomagnetic field produce auroral currents, or electrojets which flow horizontally in the ionosphere [2]- [4]. It is possible for these fluctuating currents to reach a magnitude of 1 million amperes or more [4], [6], and thus cause strong disturbances to the geomagnetic field. The intensity of solar activities is correlated with the sunspot cycle, which has a period of about 11 years.…”

Section: Introductionmentioning

confidence: 99%

“…During solar flares, coronal mass ejections and other solar events, huge amounts of radiation, charged particles and plasma are ejected by the Sun [1]- [3]. This intense outflow of electromagnetic fields and plasma is defined as the solar wind [1], [4] and usually takes 28 to 100 hours to travel to Earth if it blows in Earth's direction. Extreme solar storms can take less, such as the 2003 "Halloween storm" which took only 19 hours [5].…”

Section: Introductionmentioning

confidence: 99%

Making VSC-HVDC control robust to geomagnetically induced current

Gao

Barnes

2016

2016 IEEE Power and Energy Society General Meeting (PESGM)

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Abstract-Solar storms can affect the terrestrial power grid by inducing potential differences between points on the earth. These can couple into the power system through earthed structures such as transformer earths, which in turn can result in transformer saturation through geomagnetically induced current (GIC). For systems such as voltage-source converter (VSC) HVDC, this causes a variety of problems. This paper discusses the phenomenon, system modelling to assess the resulting problems and presents a compensate strategy to ameliorate GIC effects for VSC-HVDC.

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Bracing for the geomagnetic storms

Cited by 198 publications

References 0 publications

Space weather and dangerous phenomena on the Earth: principles of great geomagnetic storms forcasting by online cosmic ray data

Space weather and dangerous phenomena on the Earth: principles of great geomagnetic storms forcasting by online cosmic ray data

The Applicability of Governance Method for DC Bias Due to Different Causes

Making VSC-HVDC control robust to geomagnetically induced current

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