Toward User-Centered Bounded State Estimation in Power Grids: Theory and Method

Despite the popularity of the Weighted Least Squares (WLS) method, this brief shows that the traditional WLS method may not meet some desired requirements of operators/users. To this end, this brief presents a user-centered bounded (UCB) state estimation (SE) model. A theoretical foundation is provi...

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Bibliographic Details
Published inIEEE transactions on circuits and systems. II, Express briefs Vol. 71; no. 6; pp. 3211 - 3215
Main Authors Tian, Wei, Chiang, Hsiao-Dong, Liang, Dong
Format Journal Article
LanguageEnglish
Published New York IEEE 01.06.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Current measurement
Manifolds
measurement residuals
Measurement uncertainty
Numerical methods
Phasor measurement units
Power measurement
State estimation
User requirements
user-centered bounded state estimation
Weight measurement
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Summary:Despite the popularity of the Weighted Least Squares (WLS) method, this brief shows that the traditional WLS method may not meet some desired requirements of operators/users. To this end, this brief presents a user-centered bounded (UCB) state estimation (SE) model. A theoretical foundation is provided for the proposed UCB SE model/formulation. A necessary and sufficient condition is derived for the existence of a SE solution to the UCB SE problem. Furthermore, a theory-based numerical method is developed to solve the UCB SE problem. Numerical evaluations are conducted on the state estimation of the IEEE 9-bus system and the IEEE 118-bus system under various conditions to highlight some distinguished features of the proposed UCB SE formulation and the theory-based numerical method.
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2024.3353790