Author(s): J. Allan, J.H. Jin & K. Payne
A research project is being carried out by the University of Birmingham,
sponsored by London Underground Ltd, to research into a new earth fault
detection system on a fourth rail power supply system.
It is proposed that the
fault detection system will make use of the first characteristic harmonic
component of ripple on the output side of the substation rectifiers.
therefore necessary to have knowledge of the variation in the voltage of the first
harmonic component of the ripple with load current on the output side of the
Analytical and simulation studies were carried out, which
revealed that the variation in first characteristic harmonic component of
substation ripple with load current did not appear to match classic theory where
Size: 571 kb
Paper DOI: 10.2495/CR000511
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