A circuit representing method for state estimation errors in distribution networks

被引：0
作者：
Chen, Xiaoshuang [1 ]
Lin, Jin [1 ]
Song, Yonghua [1 ]
机构：
[1] State Key Lab of Control and Simulation of Power Systems and Generation Equipment, Department of Electrical Engineering, Tsinghua University, Haidian District, Beijing
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2014年 / 34卷 / 28期
基金：
中国国家自然科学基金;
关键词：
Circuit representing; Distribution network; Measurement accuracy; Source intensity; State estimation;
D O I：
10.13334/j.0258-8013.pcsee.2014.28.011
中图分类号：
学科分类号：
摘要：
Measurements in distribution networks are usually not sufficient and sometimes even inaccurate, which severely influence the accuracy of state estimation. Therefore, it is critically important for power system planners and operators to evaluate how accuracies of real-time and pseudo measurements affect on state estimation errors of distribution networks. The existing methods, which usually calculate inverse matrix of information matrix, do not have a clear physical meaning, and they are difficult to analyze the role of each measurement. This paper proposed a circuit representing method for state estimation errors in distribution networks. The method used an admittance circuit to represent effects of measurement accuracies on state estimation errors, and evaluated effects of different types of measurements according to the defined indexes of source intensity and relational intensity. Both theoretical analysis and case study results verify the effectiveness of the method on calculating state estimation errors in distribution networks and evaluating measurement influences, so as to provide guidance for the operation and planning of distribution networks. ©2014 Chinese Society for Electrical Engineering
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页码：4839 / 4846
页数：7
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