Design and simulation of four-leg based three-phase four-wire shunt active power filter

This paper emphasis on design parameter and performance analysis of Four-Leg based Three-Phase Four-Wire Shunt Active Power Filter (4L3P4W SAPF). The 3P4W electrical distribution system have been widely used to deliver power to single-phase and/or three-phase loads. They cause harmonics, reactive power burden, unbalanced currents and excessive neutral current. This problems reduce power quality, system efficiency and increase losses in system. To mitigate this issues four-wire shunt active power filter is used in 3P4W system. In this paper 4L based 3P4W Shunt Active Power Filter, based on Instantaneous Reactive Power Theory (p-q Theory) and Synchronous Reference Frame Theory (SRF Theory) is simulated. All simulation done in PSIM Version 9.0 software.