排灌机械工程学报
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排灌机械工程学报  2016, Vol. 34 Issue (1): 38-44    DOI: 10.3969/j.issn.1674-8530.15.0012
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内反馈电动机运用于泵站的节能效益分析
徐瑛瑛, 莫岳平, 吴松, 吴磊, 张贇媛
扬州大学水利与能源动力工程学院, 江苏 扬州 225127
Analysis of energy conservation of internal feedback motor in pumping stations
XU Yingying, MO Yueping, WU Song, WU Lei, ZHANG Yunyuan
School of Hydraulic, Energy and Power Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
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摘要 设计了一套内反馈电动机控制系统,根据整流逆变原理及其公式推导结果,设计了该系统的斩波器,用于内反馈电动机调速.将三相交流电压方程进行派克变换后转化为两相旋转坐标系下的电压方程,并结合前馈解耦控制策略得到三相电压型逆变器在dq坐标下的电压控制指令,设定q轴电流(无功电流)的给定值为0,即可实现该控制系统的单位功率因数控制.SVPWM控制器采样控制电压,并根据定子侧电压、电流信号的相位和大小产生驱动信号,控制逆变器的6个IGBT的开通和关断,将回馈的能量输送到定子附加绕组上,实现能量的二次利用.利用MATLAB对该控制系统进行仿真试验,仿真结果表明:随着斩波器占空比的逐步减小,电动机的速度也在不断减小,电动机有功功率不断减少,而无功功率始终为0,说明电动机在平滑调速的同时能保持较高的功率因数.以江苏省某泵站为例,采用内反馈电动机作为泵站的主电动机后,该泵站一年节约了电费41.31万元,计算结果表明该泵站获得了很高的经济效益.
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徐瑛瑛
莫岳平
吴松
吴磊
张贇媛
关键词内反馈电动机   单位功率因数   仿真   经济效益   泵站     
Abstract: For internal feedback motors, a control system is designed, in which a chopper circuit is developed for speed regulation based on the rectifier-inverter principle and corresponding formulas. The voltage control instructions in dq rotating reference frame are generated by changing the voltage in 3-phase static reference into 2-phase rotating reference with PARK transformation combined with the forward feedback decoupling control strategy. A unity power factor operation can be achieved by setting the current of the q axis(reactive current)to be 0. The SVPWM controller generates a driving signal according to the phase and amplitude of voltage and current stator as well as sampling control voltage. By controlling the IGBT on or off, the excess energy is delivered to the stator. The control system is simulated in MATLAB and the results show that with the decrease of duty ratio, the speed and active power reduce, and the reactive power remains zero, suggesting the internal feedback motor is subject to a higher power factor during speed regulating. Finally, the electric bill of a pumping station in Jiangsu Province is calculated when the internal feedback motors are used to drive the pumps for a year. It is shown that a ¥413 100 budget can be saved after the motors are used, causing significant economic benefits.
Key wordsinternal feedback motor   unity power factor   simulation   economic benefits   pumping station   
收稿日期: 2015-01-14;
基金资助:国家自然科学基金资助项目(51405428)
通讯作者: 莫岳平(1962—),男,江苏武进人,教授,博士(通信作者,moyp@sina.com),主要从事电动机及其控制研究.   
作者简介: 徐瑛瑛(1989—),女,江苏南通人,硕士研究生(xuyingying2015@126.com),主要从事新型特种电机、电器及其控制研究.
引用本文:   
徐瑛瑛,莫岳平,吴松等. 内反馈电动机运用于泵站的节能效益分析[J]. 排灌机械工程学报, 2016, 34(1): 38-44.
XU Ying-Ying,MO Yue-Ping,WU Song et al. Analysis of energy conservation of internal feedback motor in pumping stations[J]. Journal of Drainage and Irrigation Machinery Engin, 2016, 34(1): 38-44.
 
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