> A millisecond latency will cause a significant out of phase shift to the AC signal too.
Ooh, good point. But then, we have I think micro- or even nano-second clock sync over public internet now. Or use (reliable) GPS timestamps codified in the sync signal.
> The AC data you want is already codified in the power signal
You're right, but:
> there needs to be more communication across the grid than just responding to the locally observed frequency
Maybe large stations need a grid-wide sync signal that is independent of load, but small (e.g. domestic, community) suppliers just latch on the observed AC (which is easy for an inverter).
Ooh, good point. But then, we have I think micro- or even nano-second clock sync over public internet now. Or use (reliable) GPS timestamps codified in the sync signal.
> The AC data you want is already codified in the power signal
You're right, but:
> there needs to be more communication across the grid than just responding to the locally observed frequency
Maybe large stations need a grid-wide sync signal that is independent of load, but small (e.g. domestic, community) suppliers just latch on the observed AC (which is easy for an inverter).