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Need Guidance in designing of LC Low Pass Filter for 10KW transformer based Power Supply

Need Guidance in designing of LC Low Pass Filter for 10KW transformer based Power Supply

Need Guidance in designing of LC Low Pass Filter for 10KW transformer based Power Supply

I am designing High voltage power supply for our service center, for inverter testing...
Power supply requirements are max 700V DC output at 16.5A current.
Auto Transformer voltage Taping points are ( 220,270,320,370,420,470,520,570,620,670, & 720 volts) and current rating is 16.5A at 50Hz, followed by 1*1 isolation transformer.
I have used 2nd order choke input LC LPF with L1=300mH, C1=220uF.
Can someone help me out with how L & C values are calculated for this case and what is the normal cut off frequency value for AC to DC filter...?
Also max 300mH inductor within our required rating is unavailable in market, max available value is 60mH and same is the case for ceramics capacitor. What should/could I do in this case....???

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