-------- In message <006a1c6a-0b2f-16fd-5fef-64352ff14...@earthlink.net>, jimlux writes: >On 2/9/17 4:03 PM, Poul-Henning Kamp wrote: >> -------- >> In message <63beea7a-f9fc-6e1d-b855-2c7056de3...@earthlink.net>, jimlux >> writes: >> >>> I think also of the issues from distributed generation - consider a >>> rooftop solar installation with 20 or so MicroInverters, all "slaved" to >>> the line. Just from manufacturing variations, I suspect each >>> microinverter is a little bit different than the others. >> >> Surprising there is almost no variation, because it hurts badly on >> both your nameplate efficiency and thermal design. > >I was thinking about phase stability and "matching" to the grid.. each >microinverter (in a short time sense) might have a different phase >relationship (which turns into power factor), essentially introducing >some "noise" into the system.
At least here in Europe, the eletricity grids were very hostile to solar initially and therefore the electrical requirements for approval ended up being very strict, so basically no: Solar inverters had to be model citizens noisewise to get installed. >HV AC lines have exactly the same problem, the switches carry enough >energy that "quenching" the arc is by no means assured through the zero >crossing. It is not by any means *assured*, but at least it is *possible*. Not so with HVDC. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
