PV based Shunt Active Harmonic Filter for Power Quality improvement

This paper investigates the performance of two-stage solar photovoltaic (PV) systems equipped with a Shunt Active Harmonic Filter (SAHF). During the most recent industrial revolution, Current harmonics have an impact on the distributed power system. Because of the widespread use of nonlinear loads, there is a problem. 

The SAHF is used to provide Harmonic mitigation, power factor correction, and other services are provided by the system as well as load compensation .The SAHF system is built with a three-leg Voltage Source Converter and DC power from the PV module.

 The first stage of this two-stage system is a DC-DC step up converter that uses the maximum power point tracking (MPPT) algorithm. The P&O algorithm is used to extract the most power. The PI controller is used to extract the reference current, and the Hysteresis Current controller is used to drive the PWM -VSI. To reduce harmonics and reactive power, the proposed PV-based SAHF is implemented with a diode rectifier load.

Keywords: Shunt Active Harmonic Filter (SAHF); P&O algorithm based MPPT; hysteresis controller; instantaneous real power theory; PV system grid integration; power quality.