General > General Technical Chat
Does the electrical grid acompany network lines?
tom66:
What makes you think power companies modulate power lines at all with high speed data? There are some installations in the UK that used to put high frequency carriers on mains electricity feeds to switch over timeswitched meters, and street lights, but most of those installs have gone away because besides very low data rate stuff it isn't practical (it's essentially just 'turn on now' and 'turn off now'). Nowadays RF stuff is used, like smart meters or LoRaWAN. Powerline ethernet kit might go from one house to another if they are on the same phase, but it won't make it up the street, because the attenuation of the cable is too great at high frequencies, and there's too much interference to reliably send data.
Ian.M:
https://www.ecmag.com/magazine/articles/article-detail/systems-fiber-optics-energy
G7PSK:
There has been some concern over Chinese built solar farms giving the Chinese access to the control network of the UK grid. How much of a concern this should be I have no idea.
I do know that the 49.9 M watt solar farm just up the road has its own HV switch gear at a sub station a couple of miles from the solar farm, the HV switch gear operated by the solar far in order to connect with the grid as and when the sun shines, no idea if that could be used for sabotage say by switching in at night and shorting out the local grid or something like that, seems unlikely to me but when the solar farm was built the planning application was put in by a UK firm which granted me permission to photographically document the build but just before the build started the UK firm sold off the whole thing to a Chinese company that rescinded the permission. They then imported labour from China (one of the planning requirements was as much local labour as possible) and when I took photos from outside the site they got very angry and shouted at me in Chinese.
DimitriP:
--- Quote ---when the solar farm was built the planning application was put in by a UK firm which granted me permission to photographically document the build but just before the build started the UK firm sold off the whole thing to a Chinese company that rescinded the permission. They then imported labour from China (one of the planning requirements was as much local labour as possible) and when I took photos from outside the site they got very angry and shouted at me in Chinese.
--- End quote ---
Fascinating! I wonder if that ever made it to the pages of the Register. Guardian
G7PSK:
--- Quote from: DimitriP on April 19, 2024, 05:13:12 pm ---
--- Quote ---when the solar farm was built the planning application was put in by a UK firm which granted me permission to photographically document the build but just before the build started the UK firm sold off the whole thing to a Chinese company that rescinded the permission. They then imported labour from China (one of the planning requirements was as much local labour as possible) and when I took photos from outside the site they got very angry and shouted at me in Chinese.
--- End quote ---
Fascinating! I wonder if that ever made it to the pages of the Register. Guardian
--- End quote ---
Not that I know of, in any case the Chinese are heroes to the likes of the Guardian and can do no wrong.
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