Design development and implementation of certain control technique to a shunt active filter for line harmonic elimination

Abstract

The use of power electronic circuits in a wide range of applications newlinefor energy efficient operation and for better control of the process has resulted newlinein distorted current waveforms in a power system This results in nonsinusoidal newlinevoltage drops across the transformers and transmission line newlineimpedances resulting in a nonsinusoidal voltage supply at the Point of newlineCommon Coupling PCC Asymmetrical distribution of large loads further newlinecomplicates the issue by causing imbalance in line currents of the three phase newlinesystem Various harmonic mitigation techniques have been proposed to newlinereduce the effect of harmonics including transformer connections passive newlinefilters Active Power Filters APFs and hybrid filters etc newlineOne of the most popular APFs is the Shunt Active Power Filter newlineSAPF This type of filter attempts to restore the sinusoidal characteristics of newlinethe line current by injecting the opposite harmonics demanded by the load newline newline