Nonlinear integral sliding mode control design of photovoltaic pumping system: Real time implementation

- Modeling and control of a nonlinear pumping system.
- High performance system with good tracking errors and chattering reduction.
- Robust control against parameters variations.
- Implementation of real time system with DSP dSpace DS1104 controlled board.

The aim of this paper is to provide high performance control of pumping system. The proposed method is designed by an indirect field oriented control based on Sliding Mode (SM) technique. The first contribution of this work is to design modified switching surfaces which presented by adding an integral action to the considered controlled variables. Then, in order to prevent the chattering phenomenon, modified nonlinear component is developed. The SM concept and a Lyapunov function are combined to compute the Sliding Mode Control (SMC) gains. Besides, the motor performance is validated by numeric simulations and real time implementation using a dSpace system with DS1104 controller board. Also, to show the effectiveness of the proposed approach, the obtained results are compared with other techniques such as conventional PI, Proportional Sliding Mode (PSM) and backstepping controls.