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Modeling and control of a high-speed solid-rotor synchronous reluctance flywheel motor/generator.

机译：高速实心转子同步磁阻飞轮电动机/发电机的建模和控制。

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摘要

This thesis presents a control system for a high-speed solid-rotor synchronous reluctance flywheel motor/generator. The objective of this research is to derive a model for a solid-rotor synchronous reluctance machine and provide a control scheme based on the model which has stable performance at high speed. The control system should be robust with respect to parameter deviation caused by phenomena such as nonlinear magnetics, rotor temperature variation, and inaccurate measurement. This project also includes the development of an LC filter design to improve the thermal performance of the system.;A dynamic model for a synchronous reluctance machine with a conducting rotor has been developed and an open-loop current regulator for high-speed operation has been designed based upon this model. The machine dynamic model is similar to an induction machine model, yet includes a magnetic saliency of the rotor. The model is then used to calculate command voltages for a desired current in an open-loop current regulator. Techniques for parameter extraction and discrete-time models for digital implementation are presented. Experimental results consisting of a 120kW discharge of a flywheel energy storage system validates the performance of the controller.;The feedforward controller includes machine parameters, and the performance inherently relies on the correctness of these values. However, inductance and resistance parameters will vary due to flux saturation and temperature, respectively. Although a feedforward control scheme is simple, fast and effective, a direct influence which deteriorates control performance can be seen on the controller's output if the parameters are varied. Hence, a feedback compensation method has been investigated to handle the possible deviation of the parameters, and to improve the feedforward controller's robustness. A systematic approach to designing a feedback compensator for the feedforward controller is presented. Also, a stability analysis for the feedback-compensated system has been performed. Improved current tracking performance can be seen in the experimental results.;The flux-linkage/current relationships of the machine are one of the major nonlinearities to be handled in a machine controller. A more precise modeling of nonlinear magnetics becomes essential for control purposes and for understanding the limitations imposed by them. The feedforward controller can handle more diverse operating conditions by incorporating a better model of the machine dynamics. Therefore, a more accurate model to represent the nonlinear magnetics for the feedforward controller has been developed. The performance improvement by the modified model has been shown through the experimental results.;Although synchronous reluctance machines with solid rotor construction have advantages in certain high-speed applications such as flywheel energy storage systems, the solid rotor allows the flow of eddy currents, which results in heat generation. A three-phase LC filter can reduce rotor losses due to the switching harmonics. The design and control of a high-speed synchronous reluctance drive with a three-phase LC filter has been investigated. A two-phase dynamic model of the drive which incorporates the LC filter dynamics is presented. The model is used to predict rotor losses due to switching harmonics generated by the three-phase inverter using phasor analysis. A feedforward current regulator is utilized, which is modified to include the effects of the LC filter. Experimental results validate the proposed approach.
机译：本文提出了一种用于高速实心转子同步磁阻飞轮电动机/发电机的控制系统。本研究的目的是推导一种用于实转子同步磁阻电机的模型，并基于该模型提供一种在高速下具有稳定性能的控制方案。控制系统对于由非线性磁现象，转子温度变化和测量不准确等现象引起的参数偏差应具有鲁棒性。该项目还包括开发LC滤波器设计，以改善系统的热性能。;已开发了具有导电转子的同步磁阻电机的动态模型，并已开发了用于高速运行的开环电流调节器基于此模型进行设计机器动力学模型类似于感应机器模型，但包括转子的磁凸度。然后，该模型用于计算开环电流调节器中所需电流的指令电压。提出了用于数字实现的参数提取技术和离散时间模型。由飞轮储能系统的120kW放电组成的实验结果验证了该控制器的性能。前馈控制器包括机器参数，而性能本质上取决于这些值的正确性。但是，电感和电阻参数将分别由于磁通饱和度和温度而变化。尽管前馈控制方案简单，快速且有效，但是如果更改参数，则会在控制器的输出上看到直接影响控制性能的影响。因此，已经研究了一种反馈补偿方法来处理可能的参数偏差，并提高前馈控制器的鲁棒性。提出了一种为前馈控制器设计反馈补偿器的系统方法。另外，已经执行了针对反馈补偿系统的稳定性分析。在实验结果中可以看到改善的电流跟踪性能。机器的磁链/电流关系是机器控制器要处理的主要非线性之一。非线性磁学的更精确建模对于控制目的和理解其施加的限制至关重要。前馈控制器可以通过合并更好的机器动力学模型来处理更多种不同的操作条件。因此，已经开发出一种更精确的模型来表示前馈控制器的非线性磁性。实验结果表明了改进模型的性能改进。尽管具有实心转子结构的同步磁阻电机在某些高速应用（例如飞轮储能系统）中具有优势，但实心转子允许涡流流动，从而导致发热。三相LC滤波器可以减少由于开关谐波引起的转子损耗。研究了带有三相LC滤波器的高速同步磁阻驱动器的设计和控制。提出了具有LC滤波器动态特性的驱动器两阶段动态模型。该模型用于通过相量分析预测由三相逆变器产生的开关谐波引起的转子损耗。利用前馈电流调节器，将其修改为包括LC滤波器的影响。实验结果验证了该方法的有效性。

著录项

  • 作者

    Park, Jae-Do.;

  • 作者单位

    The Pennsylvania State University.;

  • 授予单位 The Pennsylvania State University.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2007
  • 页码 175 p.
  • 总页数 175
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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