Data fusion method of WAMS/SCADA hybrid measurements in power system state estimation

被引：0
作者：
Li, Congshan [1 ]
Liu, Tianqi [1 ]
Li, Xingyuan [1 ]
Wu, Xing [1 ]
机构：
[1] School of Electrical Engineering and Information, Sichuan University
来源：
Gaodianya Jishu/High Voltage Engineering | 2013年 / 39卷 / 11期
关键词：
Curve fitting; GPS time tick; Multiple time scale; PMU; SCADA; State estimation; Time compensation; WAMS;
D O I：
10.3969/j.issn.1003-6520.2013.11.016
中图分类号：
学科分类号：
摘要：
In order to make full use of phasor measurement units (PMU), and to combine the units with supervisory control and data acquisition (SCADA) measurements for improving the precision of state estimations, we analyzed four major differences (i.e. in data components, transmission delay, refresh rate, precision of data) between wide area measurement systems (WAMS) and SCADA. Then we presented a method of data component processing in three kinds of estimation model including linear, nonlinear and mixed nonlinear, as well as a combined method of global positioning system (GPS) synchronization and delay correction for improving the consistency of data section. The subsection curve fitting method was used to fill the vacancy of SCADA data when PMU are uploading, and a multiple-time-scale data set was established for state estimations in multiple time scales. Based on simulations of a four-node test system with random errors considered, we obtained measurement data for further tests, and adopted a weighted least-squares estimation algorithm to verify the proposed methods.
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收藏
页码：2686 / 2691
页数：5
相关论文
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