A New Digital Double Integral Sliding Mode Maximum Power Point Tracker for Photovoltaic Power Generation Application

Abstract

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 and with PWM mechanism its operation is enhanced 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.