MODELLING AND SIMULATION OF ENERGY-EFFICIENT CONTROLLERS FOR PUMPS WITHIN PROCESS INDUSTRY

V. Vivek, R.P. Kumudini Devi, and C. Chellamuthu

Keywords

Induction Motor, submersible pump, neural network, saturation

Abstract

The submersible pump is one of the major energy-consuming devices on the utility side. This work considers the modelling, simulation, and control of induction motor-driven submersible pump. A nonlinear fifth-order model for the motor and a second order for the submersible pump have been used to include nonlinearities such as saturation of magnetic core and efficiency of the pump when powered by sinusoidal and VSI-fed voltage source. The discharge of the submersible pump is very difficult to monitor under closedloop conditions. Hence a discharge estimator is developed based on motor input voltage, line current, and frequency to predict the quantum of water flow under realistic conditions. A closed-loop discharge controller is designed to control discharge without actually monitoring it. A considerable energy savings is obtained in the closed-loop operation.

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