Integral SMC Strategy for MPPT of the Solar PV System Under Varying Climatic Conditions

The present work puts forward an integral sliding mode control (ISMC) approach so as to track a maximum power point (MPP) of a solar photovoltaic (PV) system that includes a PV array, a converter, and a resistant charge. The controller role consists of using the photovoltaic generation system to its required maximum power point by adjusting the boost converter duty cycle. Thus, the suggested control approach is modified by the introduction of an integral action in the sliding surface with the purpose of improving the transient response and reducing the steady-state error. The stability of the proposed ISMC is examined by means of the theory of Lyapunov and the control action didn’t present any chattering behavior. Numerical simulations are studied to prove the robustness of the designed concept, using a non-linear model. The results of simulation prove that the proposed controller (ISMC) offers a higher speed response and fewer stable-state error relative to the traditional SMC method.