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A study on applicability of a selective harmonic reduction method for a full operating range of a traction inverter

Szeląg M., Szeląg A.

TTS Technika Transportu Szynowego

2015

R. 22, nr 10

147--153, CD

The article presents the problem of application of a traction inverter control strategy consisting in selective elimination of harmonics (Selective Harmonic Elimination – SHE) for shaping the spectrum of traction current. The objective of this method is to reduce the conducted disturbances generated by a traction vehicle to the level below admissible values. The selection of the order of harmonics being eliminated from a voltage spectrum influences the values of the remaining voltage harmonics, hence the harmonics spectrum of current consumed from a DC network. The presented study aimed at developing the SHE method to the extent enabling its implementation to the real drive system. The article describes the results compared with limits existing in PKP (Polskie Koleje Państwowe – eng. Polish State Railways), however the presented methodology can be successfully employed for any applicable limits in DC electric traction systems.

Statistical analysis of electromagnetic interference between AC traction current and track circuits

Gavrilyuk V., Zavgorodnyj A.

Archives of Transport System Telematics

2010

Vol. 3, iss. 4

14-18

The statistical analysis of traction current harmonics in rail circuits has been provided with the aim to develop statistical evaluation methods of electromagnetic compatibility between the AC traction current and rail circuits.

Automated measurement of rail circuits parameters and harmonics of return tractive current to improve safety of movement

Serdyuk T., Gavrilyuk V.

Archives of Transport System Telematics

2009

Vol. 2, iss. 3

17-21

A method of automated measurement of rail circuits parameters and harmonics of return traction current has been elaborated. The mathematical model of traction network is proposed and allowed us to involve the action of different sources of electromagnetic interference on the operation of rail circuits. The results of modelling allowed establishing that the rail circuits are exposed to a dangerous influence of return traction current near a locomotive and substation.