borisxyz
Newbie level 1
Hello,
I have a question about LCL filter typically used with active front end (active rectifier). The filter is inserted between three phase power supply and the active front end to minimize PWM harmonics and meet THD/TDD requirements.
I am trying to understand what is the advantage in connecting capacitors in such a filter in Y configuration instead of having them connected in delta?. I believe delta is better as it will reduce current though the caps. Also, delta will reduce needed capacitance for the same cutoff frequency by a factor of three (compared to Y configuration). Inspite of all that, some major manufacturers prefer to use Y connection. Can some one explain?
I have a question about LCL filter typically used with active front end (active rectifier). The filter is inserted between three phase power supply and the active front end to minimize PWM harmonics and meet THD/TDD requirements.
I am trying to understand what is the advantage in connecting capacitors in such a filter in Y configuration instead of having them connected in delta?. I believe delta is better as it will reduce current though the caps. Also, delta will reduce needed capacitance for the same cutoff frequency by a factor of three (compared to Y configuration). Inspite of all that, some major manufacturers prefer to use Y connection. Can some one explain?
