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Message Subject SOLAR WATCH * Huge X8.2 Flare Sept. 10, 2017! (Updated Daily)
Poster Handle Hugh M Eye
Post Content
A question for Hugh-with regards to a carrington event ,would the electric grid have to be energized in order for the energy from a carrington event to have an effect? My thinking is that of a car battery energizing a system which would be a complete circut and if you disrupt the circut by removing one battery cable then would the system still feel the effects of the energy from a carrington like event ? Thank you and if anyone else has an opinion please feel free to say something
 Quoting: Anonymous Coward 31268734

i read that many of the telegraphers shut down and disconnected from the transmission lines. this did not stop the wires and poles from burning.

take a coil from a motor and remove the + side from a source.
will it still pick up electrons from a strong electric field?

i think the issue here is the ground level currents.
 Quoting: psyoptics


Thanks, Psyoptics, you're correct about the ground currents. There have been plans proposed (by the Nat'l Science Foundation I believe) for Ground Induced Currents (GICs) mitigation, but I'm certain that they were never funded or implemented. A big concern is nuclear generating plants which can't be shut down quickly. Geomagnetic substorms are unpredictable and GICs can spike wildly without warning.

Some interesting rainy-day reading if you have the time are these two PDFs on the potential effects of Geomagnetic Storms. The first a paper on SOLAR STORM THREAT ANALYSIS and covers a wide-ranging field of topics in very accessible language:
[link to www.breadandbutterscience.com]

The second focuses exclusively on the power grid question and was prepared for the Oak Ridge National Laboratory:
[link to www.fas.org]

Here's a sample from the first paper-


GICs can cause transformers to be driven into half-cycle saturation where the core of the transformer is magnetically saturate on alternate half-cycles. Only a few amperes are needed to disrupt transformer operations. A GIC level induced voltage of 1 to 2 volts per kilometer and 5 amperes in the neutral of the high-voltage windings is sufficient to drive grounded wye-connected distribution transformers into saturation in a second or less. During geomagnetic storms, GIC currents as high as 184 amps have been measured in the United States in the neutral leg of transformers. The largest GIC measured thus far was 270 amperes during a geomagnetic storm in Southern Sweden on April 6, 2000.

If transformer half-cycle saturation is allowed to continue, stray flux can enter the transformer structural tank members and current windings. Localized hot spots can develop quickly inside the transformers tank as temperatures rise hundreds of degrees within a few minutes. Temperature spikes as high as 750° F have been measured. As transformers switches 60 times per second between being saturated and unsaturated, the normal hum of a transformer becomes a raucous, cracking whine. Regions of opposed magnetism as big as a fist in the core steel plates crash about and vibrate the 100-ton transformers which are nearly the size of a small house. This punishment can go on for hours for the duration of the geomagnetic storm.
 
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