Supression of Harmonics Resonance in a Distribution Power System with Resonant Current Control



Harmonic distortion is mainly due to the tuned passive filter and line inductance which produces resonances in the industrial system. To suppress this above problem hybrid active filter is used. The proposed hybrid filter is operated as variable conductance according to the total harmonic distortion in voltage and current. Thus harmonic distortion can be reduced to an acceptable level in the power system. The hybrid active filter is a combination of seventh tuned passive filter and an active filter in series connection so that the VA rating of the active filter and the dc voltage of the active filter are reduced to acceptable levels and in addition to that hybrid active filter is used because of its filtering capability and the cost. A Design consideration is presented and experimental results are provided to validate the effectiveness of the proposed method.

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