Fault location for transmission lines with voltage and current measurements at one bus

Wanjing Xiu, Yuan Liao

Research output: Contribution to journalArticlepeer-review


This paper presents a novel fault location method for transmission lines. The proposed method extends an existing method to locate faults by employing voltage and current measurements at one bus, which can be the bus of the faulted line or be far away from the faulted line. The method is applicable if a loop exists that encloses the faulted line, and the bus, of which the voltage is used, and the branch, of which the current is used. The during-fault positive-sequence bus impedance matrix is derived. Then superimposed voltages and currents due to the fault are expressed as a function of fault location and related transfer and driving point impedances. Consequently, the fault location can be evaluated using the obtained measurements. The distributed parameter line model is adopted to consider the shunt capacitances of the line. The proposed method is independent of fault resistance and fault type. Simulation studies have been carried out based on a 27-bus power system, and promising results have been achieved.

Original languageEnglish
Pages (from-to)449-456
Number of pages8
JournalInternational Journal of Emerging Electric Power Systems
Issue number5
StatePublished - Oct 1 2014

Bibliographical note

Publisher Copyright:
© 2014 by De Gruyter 2014.


  • bus impedance matrix
  • distributed parameter line model
  • fault location

ASJC Scopus subject areas

  • Energy Engineering and Power Technology


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