Title :
High frequency thyristored converter for supplying commuter trains
Author :
Chuev, V.I. ; Uan-Zo-Li, A.B. ; Volsky, S.I.
Author_Institution :
Exp. Design Bureau, Russia
Abstract :
Most commuter railways in Russia are supplied by electrical energy of 3000 V DC. Each section of the train uses stabilized power converter for supplying its supplementary needs of voltages of 50 V and 1500 V DC, and total peak power in transient regimes up to 40 kW. This service is provided by electromechanical converters which need to be replaced by semiconductor converters. The difficulties of designing such converters are discussed. After careful consideration, it was decided to choose a resonant parallel inverter with open input and anti-parallel diodes. From the point of impulse power losses, a resonant inverter has softer commutation processes in comparison with other schemes. Open input and anti-parallel diodes makes rigid the output characteristic of the converter and, accordingly, simplify control. The parallel type of the power inverter improves operation under no-load. The power semiconductor device losses are discussed and the mathematical model of the EM processes in the converter is described.
Keywords :
commutation; insulated gate bipolar transistors; invertors; losses; power semiconductor diodes; power supplies to apparatus; railways; resonant power convertors; thyristor convertors; EM processes; Russia; anti-parallel diodes; commuter trains; electromechanical converters; high frequency thyristored converter; impulse power losses; mathematical model; open input diodes; power semiconductor device losses; resonant parallel inverter; softer commutation processes; stabilized power converter; total peak power; transient regimes;
Conference_Titel :
Power Electronics and Variable Speed Drives, 1996. Sixth International Conference on (Conf. Publ. No. 429)
Print_ISBN :
0-85296-665-2
DOI :
10.1049/cp:19960955
