reduce harmonics |
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reduce harmonics |
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 Oct 4 2002, 01:12 PM
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#1
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Intermediate Member  Group: Members Posts: 16 Joined: 27-September 02 Member No.: 109  |
HI
If I switch a capacitor bank to correct the power factor, there will be a inrush current in the system. How to solve it? Besides, how to reduce the harmonics at the same time? Thank you.;d; |
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Oct 4 2002, 09:11 PM
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#2
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Posting Freak Group: Moderator Posts: 2,054 Joined: 24-April 02 From: Christchurch, New Zealand Member No.: 1 |
Hello Lewis
Yes, when you switch in the capacitors, there is a high inrush current. The magnitude can be reduced by the addition of inductance in series, or using solid state switches to switch at the zero crossings. Harmnic currents flowing in the capacitors cxan be reduced by the addition of detunig inductors in series with the capacitors. Typically, the inductors are selected to provide a tuned circuit with the capacitors at about 189 Hz. To the fifth harmonic and higher, the circuit will look inductive and so the harmonic currents will reduce. Best regards, -------------------- Mark Empson administrator
Skype Contact = markempson | phone +64 274 363 067 LMPForum | LMP Tech Warehouse | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | LMP Software | Mark Empson Website |
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