Terminal sliding mode control with sensor reduction of a permanent magnet synchronous generator supplying a pumping system with battery storage

Abstract

This work is concerned with the study and development of a terminal sliding mode control process that employs an estimator of the wind speed and the mechanical rotation speed of the permanent magnet synchronous generator (PMSG). This results in a reduction in the overall cost of the wind power system, which comprises a PMSG, a Pulse Width Modulation (PWM) rectifier, a battery, a DC–DC converter, a PWM inverter and a centrifugal pump driven by an asynchronous squirrel-cage machine. The wind power system is validated in the MATLAB Simulink numerical simulation environment. Subsequently, the results obtained are compared with those of a conventional sliding-mode control (with a tachometric sensor and an anemometric sensor) in order to ascertain the efficacy of the proposed control method in terms of trajectory tracking, energy consumption and the reliability of the proposed estimation algorithm. The simulation results demonstrate that the proposed approach is both robust and reliable. However, it should be noted that the settling time of the estimated quantities is greater than that of the same quantities when measured with the compared approach (conventional sliding mode control).