tfrsolar
Member
- Location
- Ithaca, NY
I'm designing a system for a pumping station. There will be 3 x 7.5 HP pumps driven from variable frequency drives (VFDs). The customer would like to install a PV system to offset electricity use. The motor power will be a very large proportion of the total load on the main service with very low additional linear loads (just a few lights, etc.). The VFDs are a large rectifier load, and I read that VFDs in a scenario like this can create significant harmonics on the line side even though they will be equipped with DC line reactors. I'm concerned that the extra harmonic distortion will cause the grid-tied inverter to drop off line due to poor power quality when the pump motors run. Does anyone have any experience along these lines? Is this a realistic concern?
Thanks,
Tom
Thanks,
Tom