Accurate Fault Location for Untransposed/Transposed Transmission Lines Using Sparse Wide-Area Measurements

Xiangqing Jiao, Yuan Liao

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


This paper presents a new approach for locating short-circuit faults on untransposed transmission lines. Various fault-location algorithms have been proposed previously for transposed lines, which may not always be the case in practice. Existing methods usually require measurements recorded from one or two terminals of the faulted line, which may not be always available. To complement existing methods, this paper proposes a novel, general fault-location method for untransposed lines using sparse wide-area measurements, which is also applicable to transposed lines. Phasor measurement units are utilized to obtain the sparse wide-area synchronized measurements, which may be captured from buses far away from the faulted line. This method fully considers inherent unbalances of untransposed lines, and fully models shunt capacitances of lines based on a distributed parameter line model. Optimal estimation theory is exploited to make the most of available measurements for enhanced estimation. The method is able to locate faults on single-circuit and double-circuit line configurations, and is immune to fault resistances. Another feature of this method is that it does not require the fault type to be known. Extensive simulation studies using the Electromagnetic Transients Program have been performed, and quite accurate results have been achieved.

Original languageEnglish
Article number7247736
Pages (from-to)1797-1805
Number of pages9
JournalIEEE Transactions on Power Delivery
Issue number4
StatePublished - Aug 2016

Bibliographical note

Publisher Copyright:
© 2016 IEEE.


  • Fault location
  • optimal estimation
  • untransposed transmission lines
  • wide-area measurements

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


Dive into the research topics of 'Accurate Fault Location for Untransposed/Transposed Transmission Lines Using Sparse Wide-Area Measurements'. Together they form a unique fingerprint.

Cite this