• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.20 no.8
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• pp.88-95
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• 2006

This paper proposes an analog type Active Power Filter that adapts to the frequency change of a distributed power supply system. The proposed system removes the harmonic currents in the source power by injecting a compensation current that has the same frequency, 180 degree out of phase with the harmonic currents generated by the load. The detection of the harmonics in the source power for creating the compensating current is realized by a PLL(Phase Lock Loop) and a VCGIC(Voltage Controlled Generalized Impedance Converter). The operation of the proposed system is verified by simulation and experiment.