Open AccessTrack circuits adjusting calculation method under current influence traction interference and electromagnetic compatibility
Author(s) -
S. Razghonov,
В. Д. Кузнецов,
Olha Zvonarova,
Danylo Chernikov
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/985/1/012017
Subject(s) - electromagnetic compatibility , electronic circuit , track circuit , traction (geology) , electromagnetic interference , electrical engineering , harmonic , electronic engineering , interference (communication) , engineering , control theory (sociology) , computer science , acoustics , physics , mechanical engineering , channel (broadcasting) , control (management) , artificial intelligence
The problem of railway transport electromagnetic compatibility automation systems in recent years has been aggravated by the use of power frequency converters in electric transport drives, which significantly increase the efficiency of traction characteristics of 3-phase electric engine. However, estimate relevant harmonic levels in the frequency range used in track circuits of railway automation and telemechanic systems. The paper provides theoretical justification for practical measurements of interference. It is shown, that the interference coefficients monotonically increase in the following cases: 1) increase in the value of the harmonic frequency; 2) increase in the propagation constant, taking into account the supports resistance of the contact network; 3) increase in the circuits track length. Operating frequencies of tonal track circuits up to 800 Hz, the interference increase rate in given length of the rail circuit slows down. The increase in interference coefficients depending on the mentioned factors is explained by the fact that with current part growth of the harmonic flows from the traction substation through the earth increases and thereby creates currents asymmetry of the track circuits.