Shunt Active Power Filter for Harmonic Reduction in Microgrid Exploiting Distinctive Compensation Theory: A Technical and Eminence Review

Right now, the significance of power generation employing renewable energy source rapidly increases. Identically the concept of Distributed Generation (DG) accompanying a microgrid penetrates in the conventional energy scenario. Power Quality(PQ) is one of the considerable disputes when DGs are interfaced with grid through power electronics converter. In addition the usage of non-linear loads drives the researchers to consider PQ as severely. The current harmonics procreated from the non-linear load is recognized as the setback in PQ issues. As a consequence it is foremost to cut down the percentage of Total harmonic Distortion(THD). Shunt Active Power Filter(SHAPF) is weighed as effectual in balancing the harmonic current procreated by the non-linear load. Different type of techniques are employed for momentary current harmonics compensation in APF like (i)time domain approach(instantaneous p-q theory, Synchronous d-q Reference Frame approach(SRF)) (ii)Frequency domain approach (Fast Fourier Technique(FFT), Artificial Neural Network(ANN)) or by employing appropriate analog/digital electronic filters distinguishing subsequent harmonic component. Out of this, Time-domain analysis applying P-Q theory has evolved as a new manner to analyze because of its simplicity and fast and instantaneous speed response to develop the control algorithm for the SAPF. That's why, a thorough literature study on time domain analysis has been underlined.