Optimal energy control of induction motor standalone photovoltaic-battery pumping system

Abstract

This paper focuses on a robust backstepping control of induction motor vector. The motor is coupled to a centrifugal pump as mechanical load, fed by a standalone photovoltaic generator, equipped by the lead acid battery storage system. Throughout this attempt, two main objectives have been achieved; firstly, assuring the continuity of electrical energy production. Secondly, operating the photovoltaic panels at maximum power point. The surplus power is stored in the battery bank in the goal to be exploited later, whenever, the solar power is insufficient. For a maximum exploitation photovoltaic power, a variable step-size of Perturb and Observe maximum power point tracking has been adopted. The proposed power management system aims to meet the required power, under variable weather conditions. The performance of the developed system has been analyzed through simulation by Matlab/Simulink and SimPowerSystems Blockset. The results obtained through the used approach averred a good improvement.