The Effect of Fault States of the Twelve-pulse Rectifier During the Recuperation
Abstract
The paper deals with analysis of states from theviewpoint of the rectifier DC side . In the case of diode
breakdown the interphase short-circuit occurs and the
transformer is disconnected from the primary side by a
high-speed switch. After disconnecting the DC current of a
recuperative traction vehicle influences the circuit. The
fault states of the twelve-pulse rectifier in a substation of 3
kV DC traction system used at railways in the Czech
Republic are analyzed. The situation at the rectifier diode
breakdown and at the same time recuperative vehicles in
power supply section is examined. The vehicle with
recuperation can increase strain of elements in power
supply system under certain conditions during fault states of
the rectifier. The simulation computer model was created
for analysis of current waveforms in trolley line at this
situation. All simulations were created by the program
PSpice. The main goal is to analyze the endanger of power
supply system elements and to present the recommendation
for increasing the reliability of this mentioned power supply
system.
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