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Determination of Harmonic Current Contributions of Plants Supplied from PCC Based on State Estimation
Date
2015-05-19
Author
Sezgin, Erhart
Göl, Murat
Salor, Ozgul
Metadata
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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In this paper, a state estimation based method is proposed to determine harmonic current contributions of plants supplied from a Point of Common Coupling (PCC). By using Weighted Least Squares (WLS) state estimation, it is aimed to improve harmonic voltage measurements acquired from conventional voltage transformers, which are employed commonly in the power systems. Using measured harmonic currents and estimated harmonic voltages, harmonic contributions of all plants have been determined by employing the Norton equivalent circuits of the plants and the superposition theorem. Absence of reliable harmonic voltage measurements necessitates employing harmonic filter current measured from at least one of the plants. Using the new measurement set built after the estimation process, a model to determine the harmonic current contribution of plants supplied from a PCC has been developed.
Subject Keywords
Harmonic current contribution
,
Power quality
,
State estimation weighted least squares estimation
URI
https://hdl.handle.net/11511/35431
DOI
https://doi.org/10.1109/siu.2015.7130274
Collections
Department of Electrical and Electronics Engineering, Conference / Seminar
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In this paper, a state estimation based method is proposed to determine harmonic current contributions of plants supplied from a point of common coupling (PCC). This work mainly aims to reduce gross error of capacitive voltage transformer (CVT) measurements at harmonic frequencies using robust weighted least absolute value (WLAV) state estimation method, which provides the optimum state estimates for harmonic voltages in the presence of a redundant enough measurement set. Estimated harmonic voltages are the...
State estimation based determination of harmonic current contributions of iron and steel plants supplied from PCC
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In this paper, a state estimation based method is proposed to determine harmonic current contributions of iron and steel (I&S) plants supplied from a Point of Common Coupling (PCC). Due to highly nonlinear nature of the iron and steel plant operation, accurate estimation of the harmonic contributions of the individual plants is essential. In the proposed method, the nonlinear characteristics of the plants and the utility are modeled as harmonic current sources and the harmonic current contributions of loads...
Identification of Harmonic Current Contributions of Iron and Steel Plants Based on Time-Synchronized Field Measurements-Part I: At PCC
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Identification of Harmonic Current Contributions of Iron and Steel Plants Based on Time-Synchronized Field Measurements - Part I: at PCC
Unsar, O.; Salor, O.; ÇADIRCI, IŞIK; Ermiş, Muammer (2013-10-11)
This is the first of a two-paper series, in which a field-data-based analytical method is proposed to determine the harmonic current contributions of each Iron and Steel (I&S) Plant supplied from the Point of Common Coupling (PCC) and the upstream loads at the utility side. The non-linear characteristics of the plants and the utility are modeled as harmonic current sources, whereas the linear parts of the proposed model consist of passive circuit elements. In the proposed method, the harmonic current contri...
Identification of Harmonic Current Contributions of Iron and Steel Plants Based on Time-Synchronized Field Measurements - Part II: Inside Plants
Unsar, O.; Salor, O.; ÇADIRCI, IŞIK; Ermiş, Muammer (2013-10-11)
This is the second of a two-paper series, in which the field-data-based analytical method proposed in Part-I has been extended to determine the amount of harmonic currents sunk by the shunt harmonic filters of the Iron and Steel (I&S) Plants from the rest of the system. The non-linear characteristics of the plants and the utility are modeled as harmonic current sources, whereas the linear parts of the proposed extended model consist of passive circuit elements, with the harmonic filter RLC circuit parameter...
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E. Sezgin, M. Göl, and O. Salor, “Determination of Harmonic Current Contributions of Plants Supplied from PCC Based on State Estimation,” 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35431.
