PI CONTROLLER BASED SHUNT ACTIVE POWER FILTER FOR HARMONIC REDUCTION

P. Rathika, M Jebastin

Abstract


The active power filter is an advanced power electronic device, which can be used for compensating harmonics and improving power quality. The different types of active power filter are shunt active power, series active power, hybrid active power filter. Among the three types, The shunt active power filter injects a suitable compensating current at point of common coupling so that the harmonics present in the line are cancelled out and the sinusoidal nature of voltage and current waveforms are restored. A PI controller based control algoritham is developed to control the three phase shunt active power filter to compensate harmonics produced by the nonliner load to improve power quality. The instaneous p-q theory is used for extracting the harmonic current. Also a PI controller is developed to maintain a constant DC voltage across the capacitor of DC bus side of the inverter. The three phase shunt active power is developed by using MATLAB/SIMULINK. The proposed shunt active power can supress harmonics generated by the non liner load and it can maintain the THD value within the standard limit.

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References


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DOI: https://doi.org/10.37628/ijepst.v1i1.24

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