A new digital double integral sliding mode maximum power point tracker for photovoltaic power generation application

This paper proposed a new digital double integral sliding mode controller based MPPT (DDISMC-MPPT) for tracking the maximum power point (MPP) of a photovoltaic (PV) panel. In this DDISMC-MPPT, a new double integral sliding surface has been chosen to enhance it operating with fixed switching frequency. The DDISMC-MPPT controller is designed considering the reaching and stability conditions. It is found that the proposed controller inherent robustness and is stable. Comparing with two available DDISMC-MPPTs such as Tan´s [6] and Jiao´s [7] DDISMCs, this proposed DDISMC-MPPT performs better MPP tracking with less chattering. It is also confirmed that the settling time and chattering yielded in the proposed controller are less compared to that of Tan´s and Jiao´s DDISMC-MPPTs.