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Real-time identification of composite load model using multiple model approach.

机译：使用多模型方法实时识别复合载荷模型。

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摘要

Undoubtedly power system is one of the most complex engineering systems which have been built by human being. Simulation studies of the power system are of great importance since experimental tests in the power systems are very expensive and may interrupt continuous power delivery. Similar to other dynamical systems, a prerequisite step toward conducting valid simulations of the power system is accurate modeling and identification of the system model and parameters. Accurate models for generators and transmission lines are available while load modeling is still a challenge. Its difficulty lies in the aggregation of different loads with different characteristic and stochastic changes. Load modeling of power systems is of great importance in power system simulation for stability analysis, impedance relay setting, and load shedding.;In this thesis, dynamic and static load modeling techniques are reviewed and load modeling importance on static and dynamic voltage stability is demonstrated. Fixed and moving structure multiple model estimation algorithms are reviewed and used to design an online load estimator. Simulation results are provided for a composite load including IEEE type-6 motor to show the effectiveness of the proposed real time estimator. This thesis provide a step in the right direction toward developing accurate real time techniques for stability analysis.;The contributions of this research include a new technique to perform improved real time load parameter estimation. Contrary to existing off line stability techniques, the real time feature allows, for the first time, the performance of online stability analysis. The illustration of real time static stability is provided in this work.
机译：毫无疑问，电力系统是人类建造的最复杂的工程系统之一。电力系统的仿真研究非常重要，因为电力系统中的实验测试非常昂贵，并且可能会中断持续的电力输送。与其他动力系统相似，进行电力系统有效仿真的前提步骤是对系统模型和参数进行精确建模和识别。在负载建模仍然是一个挑战的同时，还可以提供用于发电机和输电线路的准确模型。其困难在于具有不同特征和随机变化的不同载荷的聚集。电力系统的负荷建模在电力系统仿真中对稳定性分析，阻抗继电器设置和减载有重要意义。本文对动，静态负荷建模技术进行了综述，并论证了负荷建模对静态和动态电压稳定性的重要性。 。审查了固定和移动结构的多种模型估计算法，并将其用于设计在线负荷估计器。针对包含IEEE 6型电动机的复合负载提供了仿真结果，以显示所提出的实时估算器的有效性。本文为朝着开发用于稳定分析的精确实时技术迈出了正确的一步。该研究的成果包括一种用于执行改进的实时负荷参数估计的新技术。与现有的离线稳定性技术相反，实时功能首次允许进行在线稳定性分析。这项工作提供了实时静态稳定性的说明。

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  • 作者

    Mahdieh Najafabadi, Amin.;

  • 作者单位

    Tennessee Technological University.;

  • 授予单位 Tennessee Technological University.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 M.S.
  • 年度 2012
  • 页码 157 p.
  • 总页数 157
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地下建筑;
  • 关键词

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