[MCN] Climate change is not power grid-friendly

[Lance Olsen]

Sagging lines can drop, touch something, short out and cause power outages, but that’s not all. LO

Why Do Power Lines Sag On Hot Days? | American Transmission Co ... <https://www.atcllc.com/blog/why-do-power-lines-sag-on-hot-days/>
https://www.atcllc.com/blog/why-do-power-lines-sag-on-hot-days/ <https://www.atcllc.com/blog/why-do-power-lines-sag-on-hot-days/> <https://www.google.com/search?q=heat+sag+powerlines&rlz=1C5CHFA_enUS737US737&oq=heat+sag+powerlines&aqs=chrome..69i57.8263j0j7&sourceid=chrome&ie=UTF-8#>
 <https://webcache.googleusercontent.com/search?q=cache:qFK40rHeqI0J:https://www.atcllc.com/blog/why-do-power-lines-sag-on-hot-days/+&cd=10&hl=en&ct=clnk&gl=us>Aug 13, 2015 - The lines are often heavily loaded because of increased power consumption, and the conductors, which are generally made of copper or aluminum, expand when heated. That expansion increases the slack between transmission line structures, causing them to sag.
Watch out for sagging power lines in extreme heat | Great Lakes ... <http://www.greatlakesadvocate.com.au/story/5136750/watch-out-for-sagging-power-lines-in-extreme-heat/>
https://www.greatlakesadvocate.com.au/story/5136750/watch-out-for-sagging-power-lines-in-extreme-heat/ <https://www.greatlakesadvocate.com.au/story/5136750/watch-out-for-sagging-power-lines-in-extreme-heat/>Jan 7, 2018 - Essential Energy warn about sagging power lines in heat. With extreme temperatures on the radar this summer, Essential Energy is reminding the public to stay alert when working near the electricity network as heat can alter the height of overhead power lines.
Extreme heat may cause danger if power lines sag | Coffs Coast ... <https://www.coffscoastadvocate.com.au/news/extreme-heat-may-cause-danger-if-power-lines-sag/3299674/>
https://www.coffscoastadvocate.com.au/news/extreme-heat...power-lines-sag/3299674/ <https://www.coffscoastadvocate.com.au/news/extreme-heat...power-lines-sag/3299674/>Dec 29, 2017 - Extremely hot weather creates hazards for the public if power lines sag and Essential Energy regional manager Brendon Neyland has issued a ...
Sagging lines can cause fires, but the grid is vulnerable to fire from any cause. LO

Oregon wildfire continues to threaten power lines | Electrical ... <http://www.ecmweb.com/power-quality-archive/oregon-wildfire-continues-threaten-power-lines>
https://www.ecmweb.com/power-quality-archive/oregon-wildfire-continues-threaten-power-lines <https://www.ecmweb.com/power-quality-archive/oregon-wildfire-continues-threaten-power-lines>
 <http://webcache.googleusercontent.com/search?q=cache:r04t7a0_7owJ:www.ecmweb.com/power-quality-archive/oregon-wildfire-continues-threaten-power-lines+&cd=1&hl=en&ct=clnk&gl=us>An Oregon wildfire continued to threaten the AC Pacific Intertie, one of the backbones of the Western U.S. power grid, on Thursday, although the transmission …

power line Archives - Wildfire Today <http://wildfiretoday.com/tag/power-line/>
wildfiretoday.com/tag/power-line/ <http://wildfiretoday.com/tag/power-line/> <https://www.google.com/search?rlz=1C5CHFA_enUS737US737&ei=SUJTW4bfCYKkwATZ_K2YBw&q=fire+oregon+powerlines&oq=fire+oregon+powerlines&gs_l=psy-ab.3..33i160k1.12221.17566.0.19085.11.11.0.0.0.0.113.998.7j4.11.0....0...1c.1.64.psy-ab..0.11.996...0j0i131k1j0i22i30k1j0i8i13i30k1j33i21k1.0.lw8MawQ1S_c#>
 <http://webcache.googleusercontent.com/search?q=cache:sEy1ZMbF7XIJ:wildfiretoday.com/tag/power-line/+&cd=5&hl=en&ct=clnk&gl=us>
 <https://www.google.com/search?rlz=1C5CHFA_enUS737US737&q=related:wildfiretoday.com/tag/power-line/+fire+oregon+powerlines&tbo=1&sa=X&ved=2ahUKEwj87Jqhs7DcAhVrFTQIHWCPC-YQHzAEegQIBBAF>File photo of power lines near a wildfire in Portugal, 2012.

Corridors of Risk: Fire highlights the threat to power lines from outside ... <https://rapidcityjournal.com/news/local/corridors-of-risk-fire-highlights-the-threat-to-power-lines/article_ee8caf1b-b7ca-500c-a4f2-2ce1ecc25a9a.html>
https://rapidcityjournal.com/news/local/corridors-of-risk-fire-highlights-the-threat-to-power-lines/article_ee8caf1b-b7ca-500c-a4f2-2ce1ecc25a9a.html <https://rapidcityjournal.com/news/local/corridors-of-risk-fire-highlights-the-threat-to-power-lines/article_ee8caf1b-b7ca-500c-a4f2-2ce1ecc25a9a.html>
 <https://webcache.googleusercontent.com/search?q=cache:YXKRbzaPYl8J:https://rapidcityjournal.com/news/local/corridors-of-risk-fire-highlights-the-threat-to-power-lines/article_ee8caf1b-b7ca-500c-a4f2-2ce1ecc25a9a.html+&cd=4&hl=en&ct=clnk&gl=us>May 13, 2018 - Corridors of Risk: Fire highlights the threat to power lines 



+++++++++++++++++++++++++++++++++++++++++

“Building on Sun et al. (2014), Mueller et al. (2016) systematically examined the  occurrence of record hot summers since 1950 in many land regions. They found that human influence has made record high summer temperature at least 10 times as likely and projected that the historically hottest summers would become the norm for more than half of the world’s population within 20 years.”

Chao Li et al. Recent very hot summers in northern hemispheric land areas measured by wet bulb globe temperature will be the norm within 20 years.  

Earth’s Future, accepted article. Accepted online October 17, 2017.
 
Open access:
http://onlinelibrary.wiley.com/doi/10.1002/2017EF000639/full
============================================

“… the serious meaning in a concept lies in the difference it will make to someone if it is true.”

William James (1842 –1910)
Pragmatism. Meridian Books, 1955

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://bigskynet.org/pipermail/missoula-community-news_bigskynet.org/attachments/20180722/304c8948/attachment.html>