Identification of Harmonic Current Contributions of Iron and Steel Plants Based on Time-Synchronized Field Measurements - Part II: Inside Plants

Date

2013-10-11

Author

Unsar, O.
Salor, O.
ÇADIRCI, IŞIK
Ermiş, Muammer

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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 parameters also integrated into the model. This extended method, which can also be used for harmonic contribution assessments, requires sample-by-sample, time-synchronized harmonic current measure-ments inside the plants and at the point of common coupling (PCC). It eliminates the need for harmonic voltage measurements at the expense of the need for inside-plant measurements. It has been verified both by computer simulations and by application on field data. The results have shown that the proposed method is a successful tool to determine the magnitude of harmonic currents which are sunk by the harmonic filters of I&S Plants connected to the PCC, especially when measured harmonic currents of I&S Plants exceed the actual contributions.

Subject Keywords

Electric Power Quality, Harmonic Filters, Harmonic Current Contribution, Point Of Common Coupling

URI

https://hdl.handle.net/11511/55624

Conference Name

Annual Meeting of the IEEE-Industry-Applications-Society

Collections

Graduate School of Natural and Applied Sciences, Conference / Seminar

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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 I: At PCC Unsar, Ozgur; Salor, Ozgul; ÇADIRCI, IŞIK; Ermiş, Muammer (2014-11-01) 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 nonlinear 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 contrib...
Identification of Harmonic Current Contributions of Iron and Steel Plants Based on Time-Synchronized Field Measurements-Part II: Inside Plants Unsar, Ozgur; Salor, Ozgul; ÇADIRCI, IŞIK; Ermiş, Muammer (2014-11-01) 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 absorbed by the shunt harmonic filters of the iron and steel (I&S) plants from the rest of the system. The nonlinear 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 parame...
Determination of Harmonic Current Contributions of Plants Supplied from PCC Based on State Estimation Sezgin, Erhart; Göl, Murat; Salor, Ozgul (2015-05-19) 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 No...
Determination of harmonic current contributions based on robust state estimation Sezgin, Erhan; Göl, Murat; Salor, Ozgul (2018-01-01) 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...

Citation Formats

O. Unsar, O. Salor, I. ÇADIRCI, and M. Ermiş, “Identification of Harmonic Current Contributions of Iron and Steel Plants Based on Time-Synchronized Field Measurements - Part II: Inside Plants,” presented at the Annual Meeting of the IEEE-Industry-Applications-Society, Lake Buena Vista, FL, 2013, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55624.