Correlation analysis of results of measurements in AC power supply of DC traction substations for identification of harmonic disturbances

Adam Szeląg, Tadeusz Maciołek, Marek Patoka

Abstract

The conducted study case, which is presented in the paper, created a basis for identification of the causes for occurrence of voltage distortions and development of proposals solution assuring voltage of appropriate quality parameters, which enabled supplying sensitive loads from the same 15 kV grid as traction substations. With regard to noticeable disturbances in a 15 kV network, observed at non-traction loads and devices of a 3 kV DC traction substation (especially smoothing filters and signalling and control traffic equipment), it was required to perform a set of measurements of voltage quality in a PCC both at the level of 15 and 110 kV. The measurements were performed under various operational conditions and schemes of connection of the supplied loads. An analysis of the correlation between specific harmonics, THD coefficients and the current load was undertaken.

Keywords

electric traction, harmonics, measurements, correlation

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IMEKO-TC4-2014-239.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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