4 ms·

> Direct Current Inverters can mimic the A/C sine wave, but it's not exactly the same. Some places use batteries to provide frequency stabilization for cheaper

> Direct Current Inverters can mimic the A/C sine wave, but it's not exactly the same. Some places use batteries to provide frequency stabilization for cheaper than the spinning metal they used to use. Odd that you would pick one of the most cost-effective use-cases of utility-sized batteries as an example.

csours 6y ago
I know batteries are for used for quick response grid stabilization, but I've always read that they are worse at maintaining frequency under load. Do you have a source that talks about frequency stabilization in particular?
- greglindahl 6y ago
  The Hornsdale battery in South Australia gets talked about on the news on a regular basis, as in pretty much every frequency stabilization event gets written up with how much better it was than the spinning metal that's also contracted for stabilization in that part of Australia. BTW you might also note that HVDC and DC-to-DC interconnects are becoming popular. If your theory about batteries being bad for frequency stabilization were true, they'd also be big problems.
  - csours 6y ago
    https://en.wikipedia.org/wiki/High-voltage_direct_current https://en.wikipedia.org/wiki/High-voltage_direct_current I'm not an electrical engineer, so all of this has been my lightly informed opinion. I don't have the right words or depth of knowledge to convey my impressions, sorry. I don't know about big problems, but there are certainly complications and concerns when converting DC to AC at grid scale, as you can see in the Disadvantages portion of the wiki. Sorry I don't have a better source. I don't think batteries are "bad" for frequency stabilization, I just don't think they're good at it. With regard to spinning metal, I think you may be referring to flywheel storage? Flywheels do have lower energy density than batteries. I was referring to base load generation by spinning generators.
    - greglindahl 6y ago
      There is no mention of frequency stability in the disadvantages section. Do you have any response to the main point of my comment? I was referring to the same thing you were with "spinning metal". At the top of this thread, you said "great big spinning metal shafts".

csours 6y ago

I know batteries are for used for quick response grid stabilization, but I've always read that they are worse at maintaining frequency under load. Do you have a source that talks about frequency stabilization in particular?

greglindahl 6y ago
The Hornsdale battery in South Australia gets talked about on the news on a regular basis, as in pretty much every frequency stabilization event gets written up with how much better it was than the spinning metal that's also contracted for stabilization in that part of Australia. BTW you might also note that HVDC and DC-to-DC interconnects are becoming popular. If your theory about batteries being bad for frequency stabilization were true, they'd also be big problems.
- csours 6y ago
  https://en.wikipedia.org/wiki/High-voltage_direct_current https://en.wikipedia.org/wiki/High-voltage_direct_current I'm not an electrical engineer, so all of this has been my lightly informed opinion. I don't have the right words or depth of knowledge to convey my impressions, sorry. I don't know about big problems, but there are certainly complications and concerns when converting DC to AC at grid scale, as you can see in the Disadvantages portion of the wiki. Sorry I don't have a better source. I don't think batteries are "bad" for frequency stabilization, I just don't think they're good at it. With regard to spinning metal, I think you may be referring to flywheel storage? Flywheels do have lower energy density than batteries. I was referring to base load generation by spinning generators.
  - greglindahl 6y ago
    There is no mention of frequency stability in the disadvantages section. Do you have any response to the main point of my comment? I was referring to the same thing you were with "spinning metal". At the top of this thread, you said "great big spinning metal shafts".