Maximum Efficiency Operation of a Single Stage Inverter Fed Induction Motor PV Water Pumping System

A. Raju, S. R. Kanik, Rohini Jyoti
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引用次数: 32

Abstract

Photovoltaic (PV) water pumping systems have been increasingly popular in remote areas where grid is not accessible or is too costly to install. These systems are mostly used for agriculture and household purposes. Generally, such systems use permanent magnet dc motors because of their simple circuit configuration and control strategy. However these systems require frequent maintenance. On the other hand, the conventional PV water pumping systems driven by ac motors employ a dc-dc converter followed by an inverter. The conventional systems use more number of power semiconductor switches (increases the system cost) and suffer from reduced overall efficiency as two power converters are connected in series. In this paper, a PV water pumping system using a single stage inverter fed induction motor driving a centrifugal pump is considered. The inverter simultaneously performs two functions, viz., (i) converts dc power into ac power and (ii) forces the induction motor to operate at maximum efficiency. The system considered has a simple control strategy and the viability of the control strategy is demonstrated through steady state and dynamic simulation results.
单级变频感应电机光伏水泵系统的最大效率运行
光伏(PV)抽水系统在偏远地区越来越受欢迎,这些地区无法接入电网或安装成本过高。这些系统主要用于农业和家庭用途。一般来说,这种系统使用永磁直流电动机,因为其简单的电路结构和控制策略。然而,这些系统需要经常维护。另一方面,传统的由交流电机驱动的光伏水泵系统采用直流-直流变换器,然后是逆变器。传统的系统使用更多的功率半导体开关(增加了系统成本),并且由于两个功率转换器串联连接而降低了整体效率。本文研究了一种单级变频感应电机驱动离心泵的光伏水泵系统。逆变器同时执行两个功能,即(i)将直流电源转换为交流电源,(ii)迫使感应电机以最高效率运行。所考虑的系统具有简单的控制策略,并通过稳态和动态仿真结果验证了控制策略的可行性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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