Pantograph arc location estimation using resonant frequencies in DC railway power systems

Fan, Fulin and Wank, Andreas and Seferi, Yljon and Stewart, Brian G. (2021) Pantograph arc location estimation using resonant frequencies in DC railway power systems. IEEE Transactions on Transportation Electrification. ISSN 2332-7782

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    Abstract

    Pantograph arcing in electrified railway systems not only reduces the power collection quality of a locomotive but can also damage pantograph strips and overhead lines (OHLs). Most research detects pantograph-to-OHL arcs based on on-board voltage/current measurements, pantograph cameras, etc. The use of on-board voltage/current data, though being cost-effective, rarely reflects arc locations along OHLs. This paper develops an arc positioning method which matches the position-dependent resonant frequency (RF) of an OHL with the RF extracted from voltage measurements in a pantograph arc event. A particular 20 km DC railway line supplied by two substations is first modelled in Matlab/Simulink, with the model effectiveness being assessed based on voltage measurements in an arc event. Then the OHL-related RFs estimated by the model are validated by Tableau formula, and discussed alongside impacts on RFs based on line models, locomotive locations and line lengths. These evaluations permit the generation of an RF curve that links OHL-related RFs with arc locations. The arc positioning method is tested based on the pantograph arc events presumed at various positions along the 20 km line, showing errors within 0.2 km at certain locations. The ability to determine arc locations will permit periodic inspections to be performed on determined line sections.

    ORCID iDs

    Fan, Fulin ORCID logoORCID: https://orcid.org/0000-0003-2450-6877, Wank, Andreas, Seferi, Yljon ORCID logoORCID: https://orcid.org/0000-0003-4082-1949 and Stewart, Brian G.;