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首页> 外文学位 >Comparing Point of Use Power Quality to System Level Power Quality in a Shipboard MVDC Distribution System.
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Comparing Point of Use Power Quality to System Level Power Quality in a Shipboard MVDC Distribution System.

机译：在船用MVDC配电系统中将使用点电能质量与系统级电能质量进行比较。

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摘要

The US Navy has specified stringent component based performance criteria for interconnecting electrical system devices into a shipboard distribution system. The performance criteria include power quality and harmonic content at the generation, distribution and load. The distribution system is designed to provide a high level of power quality. At the same time, the end-use loads, especially critical loads, are designed assuming a low level of power quality in the supply system. This study explores the idea of looking at the shipboard power distribution as a system, rather than a collection of individually specified components. This paper reviews the MVDC distribution network as a system, and presents the trade-offs between point of use power quality enhancement filtering, and maintaining a high system-wide level power quality.;The test bench developed for this study is designed in such a way as to allow comparisons to be made between different converter types at the generation, and at the loads. To improve power quality, different topologies of filters are reviewed to determine their effectiveness in improving the power quality both at the generation and load. By reviewing the effect the converter technology and filtering has on the power transmission, system level topology combinations can be determined which provide the best power quality at the loads.;The converter technology types are a driving factor in the results of this study. Disruptions to the normal system operating conditions, such as faults, are applied in the simulation to determine the effect the events have on the converter controls ability to restore the system to a stable operating point. Evaluation of the resulting power at the loads for detrimental effects after the disruptive event is studied to provide more insight on system level topology combinations which improve the power quality at the loads.;Results of the study show that load or generation device placement on the MVDC distribution bus will have an effect on the power quality of neighboring loads, indicating that AC harmonic distortion is transferred through the MVDC bus. The effect of converter PWM frequency on power quality is also studied. Results show that for higher PWM converter frequencies, the percent total harmonic distortion for voltage and current does not necessarily improve. A parallel resonance condition develops on the load bus which increases the percent total harmonic distortion at certain converter PWM frequencies.;Weighing the effects of all the combinations and disruptive events studied, load configurations which provided some amount of AC neutral point grounding, whether through a passive filter or wye-ground transformer on average performed better than configurations which did not.
机译：美国海军已经指定了严格的基于组件的性能标准，用于将电气系统设备互连到舰载配电系统中。性能标准包括发电，配电和负载时的电能质量和谐波含量。配电系统旨在提供高水平的电能质量。同时，假定供电系统中的电能质量水平较低，设计最终用途负载，尤其是关键负载。这项研究探索了将舰载功率分配视为一个系统而不是单个指定组件的集合的想法。本文将MVDC配电网络作为一个系统进行了回顾，并提出了使用点电能质量增强过滤与维持高系统级电能质量之间的折衷方案。以便在发电和负载时在不同转换器类型之间进行比较。为了提高电源质量，对滤波器的不同拓扑进行了审查，以确定它们在改善发电和负载时的电源质量方面的有效性。通过回顾转换器技术和滤波对功率传输的影响，可以确定系统级拓扑组合，从而在负载下提供最佳的电能质量。转换器技术类型是本研究结果的驱动因素。在仿真中应用对正常系统运行状况（例如故障）的破坏来确定事件对转换器控制系统恢复到稳定运行点的能力的影响。研究了在破坏事件后评估负载产生的功率对有害影响的方法，以提供对改善负载功率质量的系统级拓扑组合的更深入了解;研究结果表明，负载或发电设备在MVDC上的放置配电母线将影响相邻负载的电能质量，表明交流谐波失真是通过MVDC母线传递的。还研究了转换器PWM频率对电能质量的影响。结果表明，对于较高的PWM转换器频率，电压和电流的总谐波失真百分比不一定会提高。负载总线上出现并联谐振条件，这会增加某些转换器PWM频率下总谐波失真的百分比。权衡研究的所有组合和破坏性事件的影响，负载配置是否提供了一定量的AC中性点接地，平均而言，无源滤波器或星形接地变压器的性能要好于无源滤波器或星形接地变压器。

著录项

  • 作者

    Stubban, John P.;

  • 作者单位

    University of Idaho.;

  • 授予单位 University of Idaho.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2012
  • 页码 160 p.
  • 总页数 160
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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