Transformer tap setting observability in state estimation

被引：31

作者：

Korres, GN ^{[1
]}

Katsikas, PJ ^{[1
]}

Contaxis, GC ^{[1
]}

机构：

[1] Natl Tech Univ Athens, Sch Elect & Comp Engn, GR-15773 Athens, Greece

来源：

IEEE TRANSACTIONS ON POWER SYSTEMS | 2004年 / 19卷 / 02期

关键词：

phase-shift transformer; tap setting estimation; tap setting observability; voltage transformer;

D O I：

10.1109/TPWRS.2003.821629

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In conventional state estimation, transformer tap settings are treated as fixed network parameters. This may reduce the accuracy of state estimation algorithm, when a tap measurement is in error or an unmeasured tap is unknown, This paper presents a numerical observability analysis algorithm for a state estimation model which treats transformer tap settings as state variables and provides for turns ratio and phase-shift angle measurements. The proposed model is transformed to a conventional node frame of reference, by introducing one fictitious bus and one fictitious branch for each transformer with tap estimation enabled. For an unobservable system, observable islands are determined and additional measurements are directly provided for placement. Test results are presented.

引用

页码：699 / 706

页数：8

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