Real-time implementation of SPV system with DSTATCOM capabilities in three-phase four-wire distribution system

Abstract

This study deals with a real-time implementation of solar photovoltaic (SPV) grid integrated system possessing distributed static compensator (DSTATCOM) capabilities with three-phase four-wire voltage source converter (VSC) topology using least mean eighth control algorithm. The proposed system has an SPV array, a VSC, three single-phase non-linear loads connected to the grid and a ripple filter. The SPV and VSC together behave as a DSTATCOM and additionally supplies SPV power to the grid. The DSTATCOM reduces the total harmonic distortion of the grid currents, maintains the voltage of point of common coupling and improves the power factor. The maximum extraction of incident solar power on SPV array is achieved through an incremental conductance maximum power point tracking technique. The behaviour of the system is studied by developing a prototype with an SPV array simulator.