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reduce harmonics


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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,

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