[kimpeek]

> Direct Current (DC) electric power is an emerging disruptive technological area that has the potential to stimulate economic growth, inspire innovation, increase research and development opportunities, create jobs, and simultaneously advance environmental sustainability.

Was this published in the early 1900s? There is no date and DC is definitely not emerging nor disruptive.

DC won't replace AC for those who rely on remote power production.

[bsder]

This is, in fact, precisely backward.

DC is great for transmitting power. You crank the voltage, use all of the copper wire (no pesky skin effect), and sync to the grid at the DC-AC conversion point.

The limiting factor to DC was conversion losses. The Pacific DC Intertie needed to use gigantic, toxic mercury vapor tube diodes for the conversion for a very long time.

Now that we use high voltage semiconductors, that's no longer a problem. We easily convert between DC voltages as well as AC with quite remarkable efficiency.

[jacquesm]

At your typical power distribution frequencies (50 Hz, 60 Hz) the skin effect is negligible.

[jacquesm]

For grid transmission over longer hauls it will definitely be the standard, for shorter runs and local distribution we will likely be using AC for a long time to come, possibly forever.

[orf]

Why won’t it replace it, out of interest?

[wbsss4412]

Same reason why it didn’t win out 100 years ago. It isn’t as efficient.