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MODELING AND FAULT DETECTION IN ELECTROMAGNETIC DEVICES--APPLICATIONS TO SYNCHRONOUS MACHINES AND SIGNAL CONDITIONING SYSTEMS.

机译：电磁设备中的建模和故障检测-在同步电机和信号调理系统中的应用。

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摘要

With power systems complexity and size increasing, with recent trends toward operating the power systems near their capacities, and with power generating plants getting farther from demand sites because of geographical conditions and power demand distributions, it has become imperative that the behavior of power system components can be accurately predicted under different operating conditions. In particular, it is necessary to investigate power system stability in planning and operation of the systems. Techniques for development of time-domain models which would closely mimic the behavior of the power system generators and transformers in the presence of magnetic saturation and harmonics are presented.;Due to growing demand and power companies' desire to keep the cost of electricity down, trends are toward operating power systems near their capacities. This degrades reliability and, in the face of a critical component malfunction, can prove to be very costly and undesirable. When an induction motor which is driving a critical pump or fan fails, the shutdown of a main turbine-generator unit is forced. Such a forced outage is very costly due to the higher cost of replacement fuel burned at a smaller plant which, in addition, is less efficient. In this dissertation, the problem of incipient fault detection is formulated for electric motor/centrifugal pump/pipe systems and synchronous machines. For synchronous generators, algorithm for the combined estimation of physical parameters and unmeasurable damper currents, needed for development of state of the art fault detection and diagnosis procedures, has been developed.;A signal conditioning system is a device used to improve the quality of power in order to reduce equipment malfunctions. The only design of a three-phase power conditioning system which has become operational utilizes ferroresonant circuits to synthesize a set of balanced output voltages which remain constant over a wide range of input voltage fluctuations. In this dissertation, the only existing model accurately representing this system is developed. Also, a solution to the ferroresonant jump problem associated with the operation of signal conditioning systems is found and successfully tested in the laboratory.
机译：随着电力系统的复杂性和规模的增加，近来趋于使电力系统在其容量附近运行的趋势，以及由于地理条件和电力需求的分布，发电厂距离需求点越来越远，迫切需要电力系统组件的行为可以在不同的操作条件下准确预测。特别地，有必要在系统的计划和运行中研究电力系统的稳定性。提出了开发时域模型的技术，该技术可以在存在磁饱和和谐波的情况下紧密模拟电力系统发电机和变压器的行为。由于需求的增长以及电力公司希望降低电力成本，趋势是朝着电力系统接近其容量的方向发展。这降低了可靠性，并且面对关键的组件故障，可能被证明是非常昂贵和不期望的。当驱动关键泵或风扇的感应电动机发生故障时，将强制关闭主涡轮发电机单元。由于在较小的工厂中燃烧的替代燃料的成本较高，而且效率较低，因此这种强制中断的成本非常高。本文提出了电动机/离心泵/管道系统和同步电机的早期故障检测问题。对于同步发电机，已经开发了用于开发最新的故障检测和诊断程序所需的，用于物理参数和不可测量的阻尼器电流的组合估计的算法。信号调节系统是一种用于提高电源质量的设备为了减少设备故障。现已投入运行的三相功率调节系统的唯一设计是利用铁磁谐振电路来合成一组平衡的输出电压，该输出电压在很大的输入电压波动范围内保持恒定。本文开发了唯一能准确表示该系统的模型。此外，找到了解决与信号调理系统操作相关的铁弹跳问题的解决方案，并在实验室中成功进行了测试。

著录项

  • 作者

    MIRI, SEYED-MEHDI.;

  • 作者单位

    The Ohio State University.;

  • 授予单位 The Ohio State University.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 1987
  • 页码 229 p.
  • 总页数 229
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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