Double Integral Sliding Surface MPP Control for Single Stage Grid Connected Inverte

The intermittent nature of solar irradiation and temperature affects the power generation of photovoltaic (PV) systems. Therefore the extraction of the maximum power from the PV panel under varying irradiance and temperature is the desired requirement of a grid-connected inverter system. This paper proposes a double integral Sliding mode control (DISMC) for a single-stage grid-connected system to extract maximum power from the PV panel. In DISMC, the double integral control tracks the voltage error based on the designed sliding surface to achieve the steady-state reference current. Moreover, DISMC en-sures robust control in terms of system uncertainties considering the irradiation, temperature and environmental factors, and the stable operation region. The efficacy of the proposed method is demonstrated through MATLAB simulation and hardware by conducting experiments on a single-stage grid-connected system for a stable operation region under varying irradiance conditions.