Study on sliding-mode based MPPT for PV array and supplying power to AC grid

This paper aims to study the recent work regarding the maximum power point tracker (MPPT) based on a sliding-mode manner for a PV array. Such a MPPT accompanies a perturbation and observation algorithm as well as a boost converter. Moreover, it needs a straight sliding-line and some adjustments on its location until a PV characteristic curve and this sliding line cross each other at the maximum power point (MPP). The switching pattern of the boost converter is influenced by this straight line so that the PV operating point is compelled to move along an instant PV curve and onto the sliding line. Thereby the PV array will generate the maximum power. An easier explanation for convergence towards the sliding line is provided. Through the boost converter and the single-phase inverter, power delivery from a PV array to an AC grid under the above MPPT will be also considered.