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Energies 2018, 11(2), 408; https://doi.org/10.3390/en11020408

A Mixed WLS Power System State Estimation Method Integrating a Wide-Area Measurement System and SCADA Technology

Department of Electrical Engineering, Fuzhou University, Fuzhou 350116, China
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Received: 27 December 2017 / Revised: 28 January 2018 / Accepted: 30 January 2018 / Published: 9 February 2018
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

To address the issue that the phasor measurement units (PMUs) of wide area measurement system (WAMS) are not sufficient for static state estimation in most existing power systems, this paper proposes a mixed power system weighted least squares (WLS) state estimation method integrating a wide-area measurement system and supervisory control and data acquisition (SCADA) technology. The hybrid calculation model is established by incorporating phasor measurements (including the node voltage phasors and branch current phasors) and the results of the traditional state estimator in a post-processing estimator. The performance assessment is discussed through setting up mathematical models of the distribution network. Based on PMU placement optimization and bias analysis, the effectiveness of the proposed method was proved to be accurate and reliable by simulations of different cases. Furthermore, emulating calculation shows this method greatly improves the accuracy and stability of the state estimation solution, compared with the traditional WLS state estimation. View Full-Text
Keywords: power system; state estimation; wide-area measurement system; weighted least squares; mixed algorithm power system; state estimation; wide-area measurement system; weighted least squares; mixed algorithm
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Jin, T.; Shen, X. A Mixed WLS Power System State Estimation Method Integrating a Wide-Area Measurement System and SCADA Technology. Energies 2018, 11, 408.

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