考虑谐波的异步电机在线能效计量检测理论与方法研究

项目名称： 考虑谐波的异步电机在线能效计量检测理论与方法研究

项目编号： No.51507122

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 电工技术

项目作者： 李建贵

作者单位： 武汉理工大学

项目金额： 22万元

中文摘要： 考虑谐波的异步电机能效高精度检测方法和基于模型的能效计量方法的研究是提高我国电机能效水平的关键问题之一。本项目针对目前变频器驱动的异步电机能效计量检测方法的不足，考虑谐波进行理论研究，并从考虑滤波器的不确定度等级评定及改进检测方法的新角度研究高效电机能效计量检测方法。首先，考虑谐波建立高精度理论模型，定量研究谐波对电机能效的影响。利用电气系统电参量可叠加谐波、基波负序分量特点，提出一种定量检测谐波对损耗和能效影响的试验方法。其次，针对电机在线能效检测具有较大不确定性的特点，研究异步电机能效检测的不确定度评估。再次，针对测量不确定度低的问题提出一种新的基于被测电机电压-电流差值的能效计量检测方法。最后，结合运行试验和虚拟样机仿真研究，改进和优化提出的模型和计量检测方法。该项目的研究将为电机能效评估提供科学方法和技术基础，对推动我国高效电机开发推广、促进电机产业升级有重要意义。

中文关键词： 异步电机；能效计量检测；谐波；变频器驱动；不确定度

英文摘要： Efficiency determination methods of induction motor based on high-precision model and efficiency measurement methods with high accuracy are key issues to upgrade motor efficiency level in our country. To overcome the shortcomings in existing converter-fed induction motor efficiency measuring and testing methods, this project is devoted to improve the measuring and determining precision from three new perspectives, namely, establishing high-precision induction motor model considering harmonics, tracing experimental uncertainties, researching new detecting methods. Firstly, a high-precision theoretical model will be established, and the quantitative studies of the impacts of harmonics and negative sequence components on motor efficiency will be obtained and verified by simulation. Using the characteristic that harmonic(s) and negative sequence component(s) can be superimposed upon an electrical parameter, a new testing method for measuring the quantitative impacts of the harmonics on losses and efficiency are proposed. Secondly, for the in-service motor efficiency test featuring with great uncertainty, the grading of uncertainty assessment will studied. Thirdly, for the measurement with low uncertainty grading, a new measuring method based the voltage-current difference, which brings about a small scale, is proposed to increase the measuring precision. Finally, the proposed model and methods are improved and optimized through experiments and simulation. In a conclusion, this research project can provide scientific methods and techniques support for efficiency evaluation of induction motor, therefore it is very meaningful for promoting exploitation and popularization of high efficient motors and speeding up the upgrading process.

英文关键词： Induction motor;Efficiency determination and measurement;Harmonics;Converter-fed;Uncertainty