Design of an adaptive sliding mode controller for efficiency improvement of the MPPT for PV water pumping

A robust fuzzy logic PI controller for solar system battery charging

“…This system was explored by Yilmaz et al [6], however, using PI controllers are not suitable for this process since the gains are tuned manually or by optimization techniques and fixed, so it is more suitable to develop other techniques where the gains are variable during nonlinear variations. Sliding mode and model predictive controllers are proposed as solution of lacks and drawbacks of PI controllers, but the implementation of these is difficult; since the sliding mode need to define the sliding surface which is a part of the control law [7], [8]. Moreover, the model predictive, require programming of system parameters, which increases the number of sensors used and leads to high implementation costs.…”