timm33333
Electrical
- Apr 14, 2012
- 198
I have a question about power factor and resonance. When all motors are without VFD’s (variable frequency drives) then the power factor is lagging, and we use capacitors to improve power factor. When some motors are without VFD’s and some motors are with VFD’s, the VFD’s would improve some power factor but it would not be enough if the requirement of utility is that the power factor has to be close to 100%.
Also when VFD’s are present, there would be harmonics, and so filters should be used (instead of capacitors) for power factor correction. Because if we use capacitors, then there might be the problem of resonance because the capacitance of the copastors might resonate with the inductance of the source.
My question is that if we have a system which has some motors without VFD’s and some motors with VFD’s, then can we still use capacitors (instead of filters) to correct the power factor? Thanks.
Also when VFD’s are present, there would be harmonics, and so filters should be used (instead of capacitors) for power factor correction. Because if we use capacitors, then there might be the problem of resonance because the capacitance of the copastors might resonate with the inductance of the source.
My question is that if we have a system which has some motors without VFD’s and some motors with VFD’s, then can we still use capacitors (instead of filters) to correct the power factor? Thanks.