THDv, THDi and PF at the generator terminals of an AC/DC-AC converter. Why is it necessary to correct these parameters at the generator terminals when these parameters are already corrected at the load side?
For example:
AC/AC Dc-Link (12-pulse diode rectifier and 12-pulse controlled IGBT Inverter)
Generator terminals: THDv: 13%, THDi: 20% and PF: 0.50
Load side: THDv: 2%, THDi: 4% and PF: 0.99
It is corrected so that the generator side or the source side of PPC will be seeing a linear load. If the PCC side correction is neglected then the other loads connected to the PCC will experience disturbances due to the non linear load. A 12 pulse diode bridge rectifier will act a harmonic voltage source injecting harmonics in the grid.
I suggest you this study.
I hope that it would be helpful for you.
Look, if the THv , THi and Power Factor are highlight (they are bad) with converter will be worse because such introduce distortions. Not thus with the Power Factor that depend of the load.
For proper operation of the supply side, and to avoid affecting other consumers we should guarantee minimum ac harmonics in the supply side. Also, we should correct the power factor to avoid excessive reactive current component.
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