Three-phase state estimation of a distribution network based on multi-branch current mixing measurement

被引：0
|
作者：
Ge W. [1 ]
Cai Y. [2 ]
Li J. [2 ]
Cao C. [3 ]
机构：
[1] State Grid Liaoning Electric Power Co., Ltd., Shenyang
[2] School of Electrical Engineering, Northeast Electric Power University, Jilin
[3] State Grid Inner Mongolia Eastern Power Co., Ltd. Hulunbeier Power Supply Company, Hulunbuir
来源：
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | 2020年 / 48卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Branch current; Distribution network; Hybrid measurements; Micro-synchronous phasor measurement unit (μPMU); Three-phase state estimation;
D O I：
10.19783/j.cnki.pspc.190707
中图分类号：
学科分类号：
摘要：
Synchronous phasor measurement is a research hot-spot in advanced application to a distribution network. Examining hybrid measurement of a synchronous phasor and smart meter in a distribution network, this paper proposes a state estimation method for the distribution network with branch current as the state variable. In a distribution network with distributed photovoltaic access, the method transforms the μPMU and the smart meter measurement data, and realizes the minimum measurement error of the heterogeneous data branch current amplitude. First, based on the hybrid measurement system, the three-phase measurement equation model is derived. Then, the state estimation of the three-phase branch current is realized by weighted least squares method. The proposed method is applicable to the distribution network of three-phase unbalanced and multi-branch current measurement. Finally, the effectiveness of the method is verified by simulating the IEEE 37-node system with distributed photovoltaics. © 2020, Power System Protection and Control Press. All right reserved.
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页码：1 / 10
页数：9
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