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Compensation strategies for shunt active-filter control

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2 Author(s)
Cavallini, A. ; Istituto di Elettrotecnica Ind., Bologna Univ., Italy ; Montanari, G.C.

Compensation strategies for control of shunt active filters are compared in the paper. It is shown that the strategy based on unity-power factor control is appropriate when the supply voltage waveform of the plant where the active filter is connected shows significant distortion. As voltage distortion increases, this strategy provides compensated line current having lower harmonic distortion and RMS value with respect to the strategy generally used. This contributes to diminish the current and voltage distortion in networks. The unity-power factor compensation strategy conditions the current flowing in the plant where compensation is realized to fit the voltage waveform, thus reaching a unity power factor. Hence, the line current RMS value is minimum. The comparison of the strategies is performed by both Monte Carlo and ATP simulation

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Power Electronics, IEEE Transactions on  (Volume:9 ,  Issue: 6 )