双馈电机无速度传感器控制转速辨识方法研究

发布时间：2018-01-28 01:12

本文关键词： 双馈电机定子磁链定向矢量控制 MRAS 高频注入　出处：《中国矿业大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着交流传动技术的不断发展,双馈电机无速度传感器调速系统在一些高电压、大功率应用场合优势明显,具有快速动态响应、低谐波污染、高效能等特点,并且装置简单、可靠性好、变频器功率较小,对其进行详细研究具有重要的理论价值及实际指导意义。本文在查阅了大量文献书籍的基础上,将双馈电机控制系统发展现状以及无速度传感器控制现状进行了详细阐述,得到无速度传感器的优势:引入无速度传感器控制提高了双馈电机控制系统可靠性及环境适应性,扩大了双馈电机调速系统应用范围。在研究双馈电机无速度传感器控制系统之前,首先对电机数学模型进行了详细的阐述,给出双馈电机在三相静止坐标系和两相同步旋转坐标系下的数学模型,详述了双馈电机的调速原理及各种运行状况,为后文的深入研究打下基础。在双馈电机数学模型基础上,对各种定向矢量做了对比,选取了相对较优的定子磁链定向方案,并通过理论分析,得到一个可以消除积分漂移的磁链观测器模型。然后推导了基于定子磁链定向的双馈电机矢量控制方程,并进行了仿真实验验证,证明了所提出的控制策略的有效性。最后,针对无速度传感器控制中电机转速观测,采用了基于定子磁链定向的模型参考自适应(MRAS)方法和基于转子高频信号注入的无速度传感器控制方法。前者基于电机的数学模型构建了电压参考模型和电流可变模型,基于Popov超稳定理论推导设计自适应律,并进行了仿真实验验证,在电机中、高速运行时具有很好的转速观测效果,取得了较好的动、静态性能。后者针对双馈电机在低速运行时转速观测而提出的,在转子侧注入高频信号,然后从定子侧提取包含转速信息的高频信号,经过解调后得到电机转速,并通过仿真实验验证了该方法的有效性。
[Abstract]:With the development of AC transmission technology, the speed sensorless speed regulating system of doubly-fed machine has obvious advantages in some high voltage and high power applications. It has the characteristics of fast dynamic response, low harmonic pollution, high efficiency and so on. And the device is simple, the reliability is good, the frequency converter power is small, it has the important theory value and the practical guiding significance to carry on the detailed research to it. The development status of doubly-fed motor control system and the current situation of sensorless speed control are described in detail. The advantages of speed sensorless control are obtained: speed sensorless control is introduced to improve the reliability and environmental adaptability of doubly-fed motor control system. Before studying the speed sensorless control system of doubly-fed motor, the mathematical model of the motor is described in detail. The mathematical models of double-fed machine in three-phase stationary coordinate system and two-phase synchronous rotating coordinate system are given. The principle of speed regulation and various operating conditions of double-fed machine are described in detail. On the basis of mathematical model of doubly-fed machine, various orientation vectors are compared, and a relatively optimal stator flux orientation scheme is selected, and theoretical analysis is carried out. A flux observer model which can eliminate the integral drift is obtained. Then the vector control equation based on stator flux orientation is derived and verified by simulation experiments. The effectiveness of the proposed control strategy is proved. Finally, the speed observation of the motor in sensorless control is discussed. A model reference adaptive control system based on stator flux orientation is proposed. Methods the voltage reference model and the current variable model are constructed based on the mathematical model of the motor and the speed sensorless control method based on the high frequency signal injection of the rotor. The adaptive law is deduced and designed based on the Popov superstability theory, and the simulation results show that in the motor, the speed observation effect is very good when running at high speed, and good motion is achieved. Static performance. The latter is proposed to measure the speed of the double-fed machine at low speed. High frequency signals are injected into the rotor side, and then the high frequency signals containing the speed information are extracted from the stator side. The motor speed is obtained by demodulation, and the effectiveness of the method is verified by simulation experiments.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM301.2

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