Unbalanced source identification at the point of evaluation in the distribution power systems
Unbalanced source identification at the point of evaluation in the distribution power systems
复制标题
配电电力系统评估点的不平衡源识别
DOI：
10.1002/etep.2460
复制
发表时间：
2018
影响因子：
2.3
通讯作者：
Li Peixin
中科院分区：
文献类型：
--
作者：
Sun Yuanyuan;Xie Xiangmin;Li Peixin
三相不平衡是电力系统中最重要的电能质量问题之一。当系统在不平衡条件下工作时，会引起更多的损耗和热效应，系统将变得不稳定，这对公用事业和用户都是有害的。对于一个严重失衡的系统，最重要的是找出主要的失衡源，采取适当的措施来缓解问题。提出了一种在配电网评估点（POE）识别主要不平衡源的方法。在假设不平衡源完全来自POE上游网络或下游网络的情况下，分析了两种极端情况。因此，推导出了两个相应的解析公式，揭示了POE电压不平衡因子（VUF）和电流不平衡因子（CUF）之间的关系。然后，提出了一种方法，以确定在上游和下游网络的VUF推导的VUF和实际VUF之间的比较的基础上的不平衡源的贡献。灵敏度分析表明，所提出的方法的鲁棒性。IEEE 13节点和IEEE 37节点系统算例验证了该方法的有效性和正确性。结果表明，该方法的估计误差一般在5%以内。
Three‐phase unbalance is one of the most important power quality problems in the power system. When the system is working under unbalanced conditions, more losses and heating effects will be induced, and the system will become less stable, which is harmful to both utilities and customers. The most important thing for a seriously unbalanced system is to find out the main unbalanced source to take proper measures to mitigate the problem. In this paper, a method is proposed to indentify the main unbalanced source at the point of evaluation (POE) in the distribution power systems. Two extreme cases are analyzed in the paper by assuming that the unbalanced source to be totally from the POE upstream network or downstream network. Therefore, 2 corresponding analytical formulas are derived to reveal the relationship between the POE voltage unbalance factor (VUF) and the current unbalance factor (CUF). A method is then proposed to determine the contribution of the unbalanced source at the upstream and downstream networks based on the comparison between the derived VUFs and the actual VUF. Sensitivity analysis is implemented to show the robustness of the proposed method. The effectiveness and validity of the proposed method is illustrated by the IEEE 13‐bus test system and IEEE 37‐bus test system. It is shown that the estimation error of the proposed method is generally within 5%.
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DOI：
10.1109/powercon.2012.6401337
发表时间：
2012-10
期刊：
2012 IEEE International Conference on Power System Technology (POWERCON)
影响因子：
--
作者：
U. Jayatunga;S. Perera;P. Ciufo
通讯作者：
U. Jayatunga;S. Perera;P. Ciufo
DOI：
10.1109/ichqp.2012.6381224
发表时间：
2012-06
期刊：
2012 IEEE 15th International Conference on Harmonics and Quality of Power
影响因子：
--
作者：
T. Seiphetlho;A. Rens
通讯作者：
T. Seiphetlho;A. Rens
影响因子：
4.4
作者：
Z. Liu;J. Milanović
通讯作者：
Z. Liu;J. Milanović
影响因子：
--
作者：
M. Chindris;A. Cziker;A. Sumper;A. Miron;A. Andreu;R. Robles
通讯作者：
M. Chindris;A. Cziker;A. Sumper;A. Miron;A. Andreu;R. Robles
影响因子：
11
作者：
S. Roostaee;M. Thomas;S. Mehfuz
通讯作者：
S. Roostaee;M. Thomas;S. Mehfuz