Open AccessA new approach to thyristor-based converter commutation configuration for AC-wire DC-motor electric locomotive traction and energy regeneration modes
Author(s) -
S. V. Vlasyevskiy,
О. А. Малышева,
Oleg Melnichenko,
Igor A. Barinov,
S. A. Boginskiy
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1614/1/012102
Subject(s) - thyristor , regenerative brake , traction power network , converters , commutation , traction motor , electrical engineering , power factor , engineering , automotive engineering , thyristor drive , single phase electric power , traction (geology) , traction substation , integrated gate commutated thyristor , electric vehicle , voltage , power (physics) , mechanical engineering , physics , brake , quantum mechanics , transformer
The widespread use of power converters in modern electric locomotives provides multiple opportunities for railway electric transport, one of them being smooth supply voltage regulation. For electric locomotives with smooth voltage regulation the overall efficiency of energy consumption is dependent on power factor of its power converters, both in traction and regenerative braking modes. Power factor of thyristor-based converters universally used on Russian railways remains to be relatively low. The paper presents a technical proposal to modernize the type AC-wire DC-motor electric locomotive power circuit by introducing a semiconducting discharge shunt in parallel with the subcircuit of rectified current, which allows for a revision of the traditional control algorithm of the converter’s thyristor arms. Mathematical modelling of the proposed circuit suggests a 4.6 % increase in converter power factor in traction mode and an 18.5 % increase in regenerative braking mode under nominal load conditions.