Abstract As an electric multiple units (EMU) train closes its main circuit breaker, an overvoltage may occur in the traction windings and the magnetizing inrush current may emerge in the primary winding of the traction transformer. This electromagnetic transients can disturb the electric equipment onboard, as well as emit high-frequency electromagnetic interference, which can hazard the normal operation of EMU. Taking the CRH2 EMU as an example, the mechanism of electromagnetic transients when closing the main circuit breaker is investigated theoretically based on the simple equivalent circuit. Then, using EMTDC/PSCAD, a simulation model of the high-voltage electrical system is established. The simulated results, which analyze factors that influence the overvoltage in traction windings and the magnetizing inrush current in primary winding, are given. To validate the simulation model, the simulated results are compared with the measured data. In the end, a solution is put forward to improve CRH2 transient performance.
Simulation Analysis on the Electromagnetic Transients of Closing Circuit Breaker for an Electric Multiple Units Train
1st ed. 2016
2016-01-01
9 pages
Article/Chapter (Book)
Electronic Resource
English
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