Inverter harmonics
Inverter harmonics
(OP)
Recently we have had some concerns about the cumulative harmonics generated by having several solar inverters on the same distribution circuit. Does anyone know of some references to the expected problems?






RE: Inverter harmonics
The spec (UL 1741) for grid-tie inverters limits the THD to about 5% with specific limits on each harmonic (< 4%). Couple this with the fact that each inverter customer will be behind a transformer which will filter out some of those harmonics and you're not likely to have problems, even with a lot of installations.
RE: Inverter harmonics
RE: Inverter harmonics
The concern came from one of our distribution engineers, as we were discussing a planned 4 to 5 MW solar instalation.
It would be nice to hear about what problems we can face, rather than be cought by suprise.