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一种矿用变频器异步电动机参数离线辨识方法
A parameter offline identification method of asynchronous motor of mine inverter
【索引】蒋德智,荣相,陈雯雅,等.一种矿用变频器异步电动机参数离线辨识方法[J].工矿自动化,2021,47(8):96-101.
【Reference】JIANG Dezhi,RONG Xiang,CHEN Wenya,et al.A parameter offline identification method of asynchronous motor of mine inverter[J].Industry and Mine Automation,2021,47(8):96-101.
【DOI】10.13272/j.issn.1671-251x.17815
【作者】蒋德智1,2,荣相1,2,陈雯雅1,2,王越1,2,连超1,2
【Author】JIANG Dezhi1,2,RONG Xiang1,2,CHEN Wenya1,2,WANG Yue1,2,LIAN Chao1,2
【作者机构】1.中煤科工集团常州研究院有限公司, 江苏 常州213015;2.天地(常州)自动化股份有限公司, 江苏 常州213015
【Unit】1.CCTEG Changzhou Research Institute, Changzhou 213015, China;2.Tiandi(Changzhou) Automation Co., Ltd., Changzhou 213015, China
【摘要】在无速度传感器条件下,变频器调速性能与异步电动机参数密切相关,现有异步电动机参数离线辨识方法大多采用快速傅里叶变换等计算电流幅值和相位,存在频谱泄漏和栅栏效应,易导致测量误差。针对该问题,提出了一种将异步电动机等效电路作为负载的矿用变频器异步电动机参数离线辨识方法。采用稳态响应法辨识定子电阻,采用瞬态响应法辨识转子电阻和漏感;在此基础上,建立同步旋转坐标系下的电动机模型,在恒压频比空载运行状态下,对电流瞬时值进行旋转坐标变换,计算电流幅值和相位,进而辨识定转子互感和空载励磁电流,避免了频谱泄漏和栅栏效应。Matlab/Simulink仿真结果表明,转子电阻和漏感参数辨识结果与给定的电动机模型参数相符,验证了参数辨识方法的准确性。380 V/22 kW电动机参数辨识实验结果表明,变频器施加给电动机的电压信号得到了正确的电流响应,与仿真结果一致,且电动机参数辨识过程可重复性较好,辨识精度较高。搭建660 V/90 kW矿用变频器机芯,将辨识出的电动机参数用于矿用变频器矢量控制系统,实测结果表明,变频器能够在额定转矩下带载启动并持续稳定运行,电动机参数辨识结果可满足矿用变频器矢量控制要求。
【Abstract】Under the condition of no speed sensor, the speed regulation performance of inverter is closely related to the parameters of asynchronous motor. Most of the existing offline identification methods of asynchronous motor parameters use fast Fourier transform to calculate the current amplitude and phase. There are spectrum leakage and fence effect and it is likely to cause measurement errors. In order to solve the above problems, a parameter offline identification method of asynchronous motor of mine inverter with the asynchronous motor equivalent circuit as the load is proposed. The steady-state response method is used to identify the stator resistance, and the transient response method is used to identify the rotor resistance and leakage inductance. On the basis of this method, the motor model in synchronous rotating coordinate system is established. The current instantaneous values are transformed in rotating coordinate to calculate the current amplitude and phase under the no-load operation condition of constant voltage frequency ratio. Then, the stator-rotor mutual inductance and no-load excitation current are identified, avoiding the spectrum leakage and fence effect. Matlab/Simulink simulation results show that the rotor resistance and leakage inductance parameter identification results are consistent with the given motor model parameters, which verifies the accuracy of the parameter identification method. 380 V/2.2 kW motor parameter identification experimental results show that the voltage signal applied to the motor by the inverter gets the correct current response, which is consistent with the simulation results. Moreover, and the motor parameter identification process has good repeatability and high identification accuracy. The 660 V/90 kW mine inverter core is built, and the identified motor parameters are used in the mine inverter vector control system. The actual test results show that the inverter can start with load and continue to run stably under rated torque. The motor parameter identification results can meet the vector control requirements of the mine inverter.
【关键词】 矿用变频器; 异步电动机; 电动机参数辨识; 离线辨识; 旋转坐标变换; 矢量控制
【Keywords】mine inverter; asynchronous motor; motor parameter identification; offline identification; rotating coordinate transformation; vector control
【文献出处】工矿自动化,2021年8期
【基金】天地科技股份有限公司科技创新创业资金专项资助项目(2020-2-TD-CXY003);天地(常州)自动化股份有限公司研发项目(2019GY102)
【分类号】TD614
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