PV based Shunt Active Harmonic Filter for Power Quality improvement

This article explores the performance analysis of two stage solar photovoltaic (PV) systems integrated with Shunt Active Harmonic Filter (SAHF). In recent industrial revolution, the distributed power system is affected by current harmonic problem due to wide-spread use of non linear loads. The SAHF system provides harmonic mitigation, power factor correction, and load compensation. The SAHF system is constructed with three-leg Voltage Source Converter and DC power extracted from the PV module. In this double stage system the first stage is a DC-DC step up converter which is implemented with maximum power point tracking (MPPT) algorithm. For extracting the maximum power P&O algorithm is used. The extraction of reference current is derived by PI controller and Hysteresis Current controller is used to drive the PWM -VSI. The projected PV based SAHF is implemented under diode rectifier load to mitigate the harmonics and reactive power.