DMCA
An Elegant Solution Using Hybrid Power Filter to Improve the Line Current Spectrum of Multiphase PWM Locomotive Rectifiers with Load Unbalance
BibTeX
@MISC{Wolfs_anelegant,
author = {Peter Wolfs},
title = {An Elegant Solution Using Hybrid Power Filter to Improve the Line Current Spectrum of Multiphase PWM Locomotive Rectifiers with Load Unbalance},
year = {}
}
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Abstract
Locomotive PWM Rectifiers employed in A.C traction systems represent several megawatts of electrical load. Typically they use multiple rectifiers/converters in parallel in order to secure high power ratings and high frequency operation. The rectifiers are supplied from a single-phase A.C. traction transformer with multiple secondaries of high leakage inductance. The switching instants of the PWM rectifiers are phase shifted and interlaced in order to achieve high ripple current cancellation, assuming that the converter loads are balanced. This would ensure the rectifiers to provide better harmonic performance and also redundancy of operation with multiple units in operation. However, in practice, rectifiers may be closely coupled to a traction
Keyphrases
load unbalance multiphase pwm locomotive rectifier line current spectrum multiple secondary high frequency operation high power rating electrical load high ripple current cancellation high leakage inductance pwm rectifier locomotive pwm rectifier multiple unit converter load single-phase a.c. traction transformer harmonic performance multiple rectifier converter
