PFC-Calculations
PFC-Formulas
|
Real energy [kW] |
 |
| Reactive energy [kvar] |  |
| Apparent energy [kVA] |  |
| Power factor |  |
| Required kvar-power [kvar] |  |
Detuned power factor correction
| Calculation of the capacitor nominal voltage (minimum voltage withstand capability) - Uc |  |
Un = Grid voltage P = Detuning ratio |
| Calculation of the capacitor nominal power - Qc |  |
Nc = Filter-nominal power Un = Grid voltage Ucn = selected capacitor nominal voltage (Ucn > Uc) P = Detuning ratio |
| Filter frequency - fres |  |
f = Grid frequency P = Detuning ratio |
| Filter star capacitance - Cy |  |
Nc = Filter-nominal power Un = Grid voltage P = Detuning ratio f = Grid frequency |
| Filter inductance – L |  |
P = Detuning ratio f = Grid frequency Cy = Star capacitance |
| Calculation of resonance points - fr |  |
ST =Transformator-nominal power [kVA] Qc = Nominal power of the capacitor bank [kVAr] uk = Transformator impedancy [%] |
| Resonance frequency - fres |  |
