A Telegrapher's equations-based implicit finite difference solution for fault location with current transformer saturation

被引:0
|
作者
Dzafic, Izudin [1 ]
Jabr, Rabih A. [2 ]
机构
[1] Univ Sarajevo, Fac Elect Engn, Zmaja Od Bosne Bb, Sarajevo 71000, Bosnia & Herceg
[2] Amer Univ Beirut, Dept Elect & Comp Engn, Beirut 11072020, Lebanon
关键词
Current transformer saturation; Fault location; Numerical simulation; Numerical stability; Partial differential equations; Time-domain analysis; Transmission lines;
D O I
10.1016/j.ijepes.2024.109966
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper introduces a fault location method based on time analysis, utilizing synchronized data collected from both ends of the faulted line. The data is obtained either from Common Format for Transient Data Exchange (COMTRADE) files or Sampled Measured Value (SMV) of the IEC-61850 protocol. The method proposed in this study employs the implicit finite difference solution to the Telegrapher's equations. In certain fault scenarios, such as when one or both transformers experience saturation, a narrow time window of data can be utilized to accurately pinpoint the fault location. The implicit solution method is unconditionally stable and therefore decouples the choice of the line discretization step from the sampling time interval, which is commonly required to maintain numerical stability of the explicit strategies for fault location. Furthermore, the numerical stability of the implicit process allows for devising a systematic search procedure that improves the accuracy of the calculated fault location, regardless of the transmission line length. By conducting numerical comparisons with an explicit time-domain fault locator and recent frequency-domain algorithms, the superiority of the proposed approach becomes evident. The results highlight the significant improvements achieved through the utilization of this method. Specifically, the results demonstrate that Telegrapher's Equations implicit finite difference solution maintains accuracy under current transformer saturation, as it can locate the fault using data from a brief interval where the current transformer is not saturated.
引用
收藏
页数:11
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