Performance Analysis of Induction Motor based PV Feed Water Pumping System with Small Signal Analysis

Abstract

Photovoltaic (PV) powered water pumping systems utilizing induction motors are becoming increasingly popular in different regions. The lack of storage devices in the system enhances its cost-efficiency. Efficient energy management is crucial for maintaining power balance within the system, and this can be achieved through the implementation of an effective control technique. A small signal analysis is performed to optimize the parameters of the controllers used in order to analyze the system. The dynamic behavior of the PV-based water pumping system, which is powered by an induction motor and regulated by a vector controller, is analyzed by converting its non-linear model into a linear model. The paper discusses the design of parameters for two PI controllers utilized to regulate the PV terminal voltage and motor speed, based on the transfer function derived from the linear model. The study also showcases the small signal function’s reaction through MATLAB, with adjustments made to the reference dc-link voltage. Additionally, a comprehensive stepby-step mathematical analysis is included to enhance the overall understanding and analysis of the system.