A cross correlation control approach for multifunctional SPV system

This work presents a two stage grid connected three-phase, four-wire (3P4W) SPV system using cross correlation control algorithm. This system not only feeds the power to the grid but it also helps in power factor correction and harmonics elimination. The proposed system includes the SPV string, a DC-DC boost converter, a voltage source converter (VSC), ripple filter and linear/nonlinear loads. For extracting maximum power from the PV string, a perturb and observe based MPPT algorithm is utilized. The fourth leg of the VSC is utilized for mitigation of neutral current at PCC in a 3P4W distribution network. A prototype of proposed system is realized in the laboratory and proposed control algorithm is experimentally verified on this developed system.