Harmonic Current Compensation and Resonance Damping Using Shunt Active Power Filter With ADALINE Harmonic Extraction Technique

Nonlinear loads in power distribution systems will cause harmonic distortion to the source current waveform. Additionally, shunt capacitors will resonate the amplitude of the distorted source current at the harmonic resonant frequency. As a result, both components will deteriorate the power quality of the source current by distorting its waveform and thus increasing its Total Harmonic Distortion (THD) value. This paper investigates the effect of nonlinear load and shunt capacitor on the source current waveform and studies the extraction algorithms for fundamental harmonic current and resonance current references based on Adaptive Linear Neuron (ADALINE) extraction techniques. Subsequently, a combined control algorithm is developed for a single-phase Shunt Active Power Filter (SAPF) to perform harmonic compensation and resonance damping. From the simulation results, the SAPF compensated both harmonic current and resonance current successfully.