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A probabilistic method for comprehensive voltage sag management in power distribution systems

机译:配电系统中电压暂降综合管理的一种概率方法

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摘要

Voltage sags, their technical and economic impact and the means of their mitigation have become popular topics for discussion, publication and R & D projects within the power engineering society. However, a tool including and combining analysis of all these fields in a simple yet mathematically exact way has not been proposed.This thesis outlines a probabilistic method for comprehensive voltage sag management named Prob-A-Sag. All quantities are processed as probabilistic two-dimensional arrays. Multiplying the arrays cell by cell gives the total annual sag related cost. Further, the optimal type and rating of a mitigation device can be assessed.Remaining voltage and sag duration are the variables considered in the arrays. Array resolution and thus the procedure accuracy are freely selectable. Increasing the number of dimensions allows for additional sag features, e.g. unbalance and phase-angle jump could be included in a future enhancement of the method.A probabilistic approach, one of the key features of the method, is essential when assessing the performance of multiple similar sag sensitive components connected together. It also proved useful in cases where specific device sensitivity tests cannot be carried out but instead, generalised data from previously prepared libraries has to be used to assess the entire process sensitivity.In addition to this method, the thesis provides sag sensitivity test results for contactors, personal computers and gas discharge lamps. Discussion and calculations on the feasibility and network requirements of custom power technology are also included.
机译:电压骤降​​,其技术和经济影响以及缓解方法已成为电力工程学会中讨论,发布和R&D项目的热门话题。然而,还没有提出一种以简单而精确的数学方法对所有这些领域进行分析的工具。本文概述了一种用于综合电压暂降管理的概率方法,称为Prob-A-Sag。所有数量均作为概率二维数组处理。逐个单元地乘以阵列可得出与下垂有关的总年度成本。此外,可以评估缓解设备的最佳类型和额定值。剩余电压和跌落持续时间是阵列中考虑的变量。可以自由选择阵列分辨率和程序精度。尺寸数量的增加允许附加的下垂特征,例如不平衡和相角跳变可能会包含在该方法的未来增强中。概率方法是该方法的关键特征之一,在评估连接在一起的多个类似下垂敏感组件的性能时至关重要。在无法执行特定设备灵敏度测试但必须使用先前准备的库中的通用数据来评估整个过程灵敏度的情况下,它也被证明是有用的。除此方法外,本文还为接触器提供了下垂灵敏度测试结果,个人计算机和气体放电灯。还包括有关定制电源技术的可行性和网络要求的讨论和计算。

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    Pohjanheimo Pasi;

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  • 年度 2003
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  • 原文格式 PDF
  • 正文语种 en
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