Supplementary Impedance-Based Fault-Location Algorithm for Series-Compensated Lines

This paper presents a new impedance-based supplementary fault-location algorithm for series capacitor-compensated transmission lines (SCCTLs), which improves the accuracy of the existing fault-location algorithms. The proposed algorithm utilizes the fact that the metal-oxide varistor (MOV) may becom...

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Bibliographic Details
Published in:IEEE transactions on power delivery 2016-02, Vol.31 (1), p.334-342
Main Authors: Bains, Tirath Pal S., Dadash Zadeh, Mohammad R.
Format: Article
Language:English
Subjects:
Algorithms
Bypass gap
Bypasses
Capacitors
Circuit faults
Computer simulation
Electric power lines
Fault currents
Fault location
Faults
Impedance
Metal oxides
metal-oxide varistor (MOV)
Nonlinearity
Phases
phasor estimation
Power transmission lines
series capacitor protection unit (SCPU)
series compensation
Transmission lines
Voltage measurement
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Summary:This paper presents a new impedance-based supplementary fault-location algorithm for series capacitor-compensated transmission lines (SCCTLs), which improves the accuracy of the existing fault-location algorithms. The proposed algorithm utilizes the fact that the metal-oxide varistor (MOV) may become bypassed in faulted or all phases before the interruption of fault for certain fault scenarios. The removal of the nonlinear element, that is, MOV from the fault loop enables the proposed algorithm to provide more accurate fault-location results compared to the most advanced impedance-based technique. Another major advantage of the proposed algorithm is that the dedicated subroutines are not required for the location of a fault in a particular section of the transmission line. The proposed fault-location algorithm is rigorously tested for various fault scenarios in the 500-kV SCCTL simulated in PSCAD. The performance of the proposed algorithm is compared to a well-known existing impedance-based fault-location algorithm for SCCTLs to illustrate higher accuracy and improved sensitivity of the proposed technique.
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2015.2476341