基于二倍频转矩脉动的异步电机定子匝间短路故障预测方法
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摘要
为了能够在故障早期有效地检测异步电机定子绕组匝间短路故障,首先建立了异步电机在定子匝间短路状态下的动态数学模型,运用坐标变换和空间矢量变换的思想对异步电机动态模型进行分析与仿真,提出了一种新的基于计算转矩二倍频脉动的匝间短路检测方法。通过搭建异步电机定子绕组匝间短路的数学模型并对其进行仿真,对匝间短路引发电路计算转矩的变化进行研究,验证了所提出方法的可行性。在此基础之上,提出以计算转矩的二倍频分量为故障特征量对异步电机定子绕组匝间短路故障进行诊断,并分析了该方法的鲁棒性和准确性,从而形成了新的异步电机定子绕组匝间短路故障诊断方法,为电机故障预测提供了新的研究思路。
To effectively detect the stator winding inter-turn short-circuit fault of an asynchronous motor at an early stage, a dynamic mathematical model for an asynchronous motor under stator winding inter-turn short-circuit fault is established in this paper at first. Next, this model is calculated and analyzed using the theories of reference frame transformation and space-vector transformation, and a novel inter-turn short-circuit detection method is put forward based on the calculation of torque double-frequency ripple. Through the construction of the mathematic model of the fault motor and the simulations thereafter, the changes in torque caused by inter-turn short-circuit fault are studied, which verifies the feasibility of the proposed method. On this basis, it is proposed that the stator winding inter-turn short-circuit fault of the asynchronous motor can be diagnosed with the double-frequency component of the calculated torque as fault characteristics. In addition, the robustness and accuracy of the proposed method are analyzed. In this way, a novel diagnosis method for stator winding inter-turn short-circuit fault of the asynchronous motor is formed, which can provide a new research idea for motor fault prediction.
To effectively detect the stator winding inter-turn short-circuit fault of an asynchronous motor at an early stage, a dynamic mathematical model for an asynchronous motor under stator winding inter-turn short-circuit fault is established in this paper at first. Next, this model is calculated and analyzed using the theories of reference frame transformation and space-vector transformation, and a novel inter-turn short-circuit detection method is put forward based on the calculation of torque double-frequency ripple. Through the construction of the mathematic model of the fault motor and the simulations thereafter, the changes in torque caused by inter-turn short-circuit fault are studied, which verifies the feasibility of the proposed method. On this basis, it is proposed that the stator winding inter-turn short-circuit fault of the asynchronous motor can be diagnosed with the double-frequency component of the calculated torque as fault characteristics. In addition, the robustness and accuracy of the proposed method are analyzed. In this way, a novel diagnosis method for stator winding inter-turn short-circuit fault of the asynchronous motor is formed, which can provide a new research idea for motor fault prediction.
引文
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[12]Nandi S.A detailed model of induction machines with saturation extendable for fault analysis[J].IEEE Transaction on Industry Applications,2004,40(5):1302-1309.
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[14]李俊卿,王志兴,王悦川.双馈异步电机定子匝间短路的建模与故障诊断[J].电机与控制应用,2015,42(12):64-69.Li Junqing,Wang Zhixing,Wang Yuechuan.Model and diagnosis of stator inter-turn short-circuit fault in DFIG[J].Electric Machines&Control Application,2015,42(12):64-69(in Chinese).
[15]张永昌,张虎,李正熙.异步电机无速度传感器高性能控制技术[M].北京:机械工业出版社,2015.
[16]李钟慎.基于MATLAB设计巴特沃斯低通滤波器[J].信息技术,2003,27(3):49-50,52.Li Zhongshen.The design of butterworth lowpass filter based on MATLAB[J].Information Tecnology,2003,27(3):49-50,52(in Chinese).
[2]Ilamparithi T,Nandi S.Comparison of results for eccentric cage induction motor using finite element method and modified winding function approach[C].2010 Joint International Conference on Power Electronics,Drives and Energy Systems(PEDES)&2010 Power India.New Delhi,India,2011:1-7.
[3]鲍晓华,程志桓,王汉丰,等.基于改进绕组函数法的感应电机偏心电感参数的计算[J].电工技术学报,2016,31(6):13-20.Bao Xiaohua,Cheng Zhihuan,Wang Hanfeng,et al.Inductance calculation of eccentric induction motor based on modified winding function approach[J].Transactions of China Electrotechnical Society,2016,31(6):13-20(in Chinese)
[4]Cruz S M A,Cardoso A J M.Diagnosis of stator inter-turn short circuits in DTC induction motor drives[J].IEEE Transactions on Industry Applications,2004,40(5):1349-1360.
[5]Wu Qing,Nandi S.Fast single-turn sensitive stator interturn fault detection of induction machines based on positive and negative sequence third harmonic components of line currents[J].IEEE Transaction on Industry Applications,2010,46(3):974-983.
[6]孙梦云.基于场路耦合时步有限元法的感应电机瞬态分析[D].宜昌:三峡大学,2013.Sun Mengyun.A dissertation submitted in partial fulfillment of the requirements for the degree of master of science in engineering[D].Yichang:China Three Gorges University,2013(in Chinese).
[7]王加军,樊露丹,张晓蕾,等.基于Ansoft的电动机故障特征分析[J].电气应用,2015,35(2):45-50.Wang Jiajun,Fan Ludan,Zhang Xiaolei,et al.Analysis of motor fault features based on Ansoft[J].Electrotechnical Application,2015,35(2):45-50(in Chinese).
[8]刘卉圻.异步电机定子绕组匝间短路故障建模与检测方法研究[D].成都:西南交通大学,2014.Liu Huiqi.Modeling and detecting methods research of stator winding turn faults in induction machines[D].Chengdu:Southwest Jiaotong University,2014(in Chinese).
[9]赵勇,王路路,赵祎涵,等.双馈风力发电机定子绕组匝间短路故障特征提取[J].热力发电,2016,45(8):63-67.Zhao Yong,Wang Lulu,Zhao Yihan,et al.Feature extraction of stator winding inter-turn short circuit fault in doubly-fed induction generator[J].Thermal Power Generation,2016,45(8):63-67(in Chinese).
[10]Tallam R M,Habetler T G,Harley R G.Stator winding turn-fault detection for closed-loop induction motor drives[J].IEEE Transaction on Industry Applications,2003,39(3):720-724.
[11]Sang B L,Tallam R M,Habetler T G.A robust,on-line turn-fault detection technique for induction machines based on monitoring the sequence component impedance matrix[J].IEEE Transactions on Power Electronics,2003,18(3):865-872.
[12]Nandi S.A detailed model of induction machines with saturation extendable for fault analysis[J].IEEE Transaction on Industry Applications,2004,40(5):1302-1309.
[13]Tallam R M,Habetler T G,Harley R G.Transient model for induction machines with stator winding turn faults[J].IEEE Transaction on Industry Applications,2002,38(3):632-637.
[14]李俊卿,王志兴,王悦川.双馈异步电机定子匝间短路的建模与故障诊断[J].电机与控制应用,2015,42(12):64-69.Li Junqing,Wang Zhixing,Wang Yuechuan.Model and diagnosis of stator inter-turn short-circuit fault in DFIG[J].Electric Machines&Control Application,2015,42(12):64-69(in Chinese).
[15]张永昌,张虎,李正熙.异步电机无速度传感器高性能控制技术[M].北京:机械工业出版社,2015.
[16]李钟慎.基于MATLAB设计巴特沃斯低通滤波器[J].信息技术,2003,27(3):49-50,52.Li Zhongshen.The design of butterworth lowpass filter based on MATLAB[J].Information Tecnology,2003,27(3):49-50,52(in Chinese).