Volume 21, Issue 2 (JIAEEE Vol.21 No.2 2024)
Journal of Iranian Association of Electrical and Electronics Engineers 2024, 21(2): 147-154 |
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Abdollahzadeh H, Matinafshar H R. Formulation of Fault-Branch Currents During Cross-Country Faults on Asymmetrical Double-Circuit Transmission Lines Considering Status of Line-Ground Faults’ locations. Journal of Iranian Association of Electrical and Electronics Engineers 2024; 21 (2) :147-154
URL: http://jiaeee.com/article-1-1556-en.html
URL: http://jiaeee.com/article-1-1556-en.html
Department of Electrical Engineering, East-Tehran Branch, Islamic Azad University
Abstract: (1018 Views)
Cross-Country faults are atypical faults occurring on double-circuit transmission lines, which include two line-ground faults on two out of six phases of the line at different locations. As for these types of faults, having access to analytic equations characterizing the fault-branch currents is regarded as a functional tool for dealing with critical issues such as fault analysis, protection/relaying, and fault location/classification. This matter has not been dealt with in the previous research in the literature yet. From analyzing the circuit model of asymmetrical double-circuit lines on a time domain basis, this paper develops a formulation of the instantaneous fault-branch currents during CCFs, considering status of L-G faults’ locations. As a result, clear-cut formulas governing the instantaneous currents flowing from the faulty phases into the fault branches during CCFs are obtained. They are acquired regarding the line one-end circuits’ phase currents and the fault locations measured from the same end. The proposed formulas would facilitate dealing with applications mentioned above, particularly those developed in time domain. The formulas are validated via the simulation studies in PSCAD/EMTDC with an accurate time-domain model of the asymmetrical lines.
Keywords: Cross-Country faults, Fault-branch currents, Asymmetrical double-circuit transmission lines, Statues of L-G faults’ locations.
Type of Article: Research |
Subject:
Power
Received: 2023/01/10 | Accepted: 2023/10/7 | Published: 2024/06/24
Received: 2023/01/10 | Accepted: 2023/10/7 | Published: 2024/06/24
Extended Abstract [PDF 226 KB] (11 Download)
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