this post was submitted on 26 Aug 2024
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The grid does not work in 230V.
It works from 10kV up to hundreds of kV. Most of your arguments do not count there.
DC is good inside the house, and maybe to the next house. If I would build a new house today, I would build extra wires everywhere for AC and for DC 24V and 5V.
Are there actually any appliances that take DC over a standard plug? Or would you just put in usb receptacles instead or something?
Good question. I have not decided such things, since I am not actually planning to do it.
I would start some research then about plugs, how others do it.
Regarding appliances, I would also build many things myself, lights etc.
https://www.sparkydirect.com.au/power-points/usb-powerpoints
DC can also be used with superconductors for long-distance energy delivery.
High voltage DC is used for transmission at 10s to 100s of kV already.
Dc transmission lines at 10kv? Dc transmission lines make sense when you need to pass a really long distance or you can only use underground cables because those have a much higher capacitaance, i.e. high reaktive currents.
If you need to supply your rural area or town you will go from some 20kv lines down to lots of 3kv and then 400v lines with multiple transformers everywhere. Dc transmission doesnt make sense here, but supplying a grid from really far away with a single line? Yea.
The fellow who built my house in the early 1990s was thinking ahead. Dual circuits, one for lighting on 24VDC and one for power on 240VAC.
If you're referring to 5VDC circuit for USB devices, you can get GPO plates with USB power sockets: https://www.sparkydirect.com.au/power-points/usb-powerpoints
I wonder what it would be like converting DC to DC at those voltages and power.