变频器谐波对调速水泵机组效率影响试验研究  

Experiment for effect of frequency converter harmonic on speed regulating pump unit efficiency

作　　者：汤玲迪[1] 袁寿其[1] 汤跃[1] 顾哲[1] 王慧[1] 

机构地区：[1]江苏大学国家水泵及系统工程技术研究中心,江苏镇江212013

出　　处：《排灌机械工程学报》2014年第12期1035-1039,共5页Journal of Drainage and Irrigation Machinery Engineering

基　　金："十二五"国家科技支撑计划项目(2011BAF14B02);江苏省农业科技支撑计划项目(BE2012385);江苏高校优势学科建设工程资助项目

摘　　要：为了掌握变频器谐波对变频调速水泵机组效率的影响，在分析变频器谐波产生机理以及谐波对水泵机组影响的基础上，采用带滤波功能的高频电参数测量仪和虚拟仪器等构建了开式试验装置．高频电参数测量仪连接在变频器的输出端，在电动机输出轴与自吸离心泵之间连接有转矩一转速传感器，并以1台典型自吸离心泵机组为对象，通过改变变频器输出频率调节自吸离心泵的转速，分别测量自吸离心泵机组滤波前后的水力性能参数和电参数，计算分析滤波前后自吸离心泵机组的效率．研究结果显示，在20～50Hz范围内，对变频器输出谐波进行抑制可使自吸离心泵机组效率提高1％～3％，电动机的效率提高3％～9％，并且频率越低，电动机和自吸离心泵机组的效率提高越明显．变频器谐波对变频调速水泵机组性能影响的量化研究将有助于调速范围的选择．Frequency control technology is an effective way in energy-saving ior pump untt. In orcter to obtain the effect of frequency converter harmonic on the efficiency of speed regulating pump unit, the experimental setup was designed based on the analysis of harmonic generation mechanism and the influ- ence of harmonic on pump unit. It was an open test apparatus and included a high frequency electrical parameter measuring instrument with filtering function, a virtual instrument, etc. In this test appara- tus, research object was a typical self-sucking centrifugal pump, the high-frequency electrical parame- ter measuring instrument was connected to the output of the inverter, and the torque-speed sensor was connected between the motor output shaft and the self-sucking centrifugal pump. Before and after filte- ring, hydraulic performance parameters and electrical parameters of the self-sucking centrifugal pump unit were collected , the efficiency of the pump unit was calculated and analyzed through changing the output frequency of frequency converter can regulate the self-sucking centrifugal pump rotating speed. The results show that the self-sucking centrifugal pump unit efficiency can be improved by 1% to 3% and the motor efficiency can be increased by 3% to 9% under the condition of suppressing the fre- quency converter output harmonic. Moreover, the lower the frequency is, the more obvious the effi- ciencies of both the motor and the unit are increased in the frequency range of from 20 Hz to 50 Hz. Quantitative research on the effect of frequency converter harmonic on performance of speed regulating pump unit can contribute to the speed range selection.

关 键 词：水泵机组 变频器谐波 恒压 能耗 

分 类 号：S277.9[农业科学—农业水土工程] TH311[农业科学—农业工程]