Precise fault location algorithm for double-circuit transmission lines using unsynchronised measurements from two anti-parallel ends

A new fault location algorithm for double-circuit transmission lines with availability of complete measurements from two anti-parallel end of the line is presented. Sequence voltage and current phasors from these ends are taken as inputs and no synchronisation between them is needed. Using the pre-f...

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Bibliographic Details
Published inIET generation, transmission & distribution Vol. 4; no. 7; pp. 824 - 835
Main Authors KORRES, G. N, APOSTOLOPOULOS, C. A
Format Journal Article
LanguageEnglish
Published Stevenage Institution of Engineering and Technology 01.07.2010
The Institution of Engineering & Technology
Subjects
Algorithms
Applied sciences
Electric potential
Electrical engineering. Electrical power engineering
Exact sciences and technology
Fault location
Faults
Geological faults
Matlab
Testing. Reliability. Quality control
Transmission lines
Voltage
Performance evaluation
Mutual coupling
Coupler
Double circuit line
EMTP
Shunt
MATLAB software
Phasor
Iterative method
Boundary condition
Synchronization
Algorithm
Angular measurement
Defect localization
Capacitance
System simulation
Effectiveness factor
Distributed parameter system
Electric fault
Defect detection
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Summary:A new fault location algorithm for double-circuit transmission lines with availability of complete measurements from two anti-parallel end of the line is presented. Sequence voltage and current phasors from these ends are taken as inputs and no synchronisation between them is needed. Using the pre-fault data, the synchronisation angles between measurements at the reference and the anti-parallel ends are obtained. Using the fault data, the faulted circuit is determined and the sequence voltages and currents at the fault point are calculated as a function of the fault distance. Finally, using the fault boundary conditions that exist for a given fault type, the fault location is derived and solved by an iterative method. Mutual coupling between circuits, source impedances and fault resistance do not influence the locating accuracy of the algorithm. The simulation results using ATP-EMTP and MATLAB demonstrate the effectiveness and accuracy of the proposed algorithm.
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ISSN:1751-8687
1751-8695
DOI:10.1049/iet-gtd.2009.0533