Research and Analysis of Transient Process of Locomotive Passing Neutral Section Based on Habedank Arc Model

Over-voltages frequently happen when locomotive passes the neutral section via articulated phase insulator, which is aggravated by arcing phenomenon. In this paper, Habedank arc model built in MATLAB/SIMULINK is introduced into the process of locomotive passing the neutral section. The electrical transient process is analyzed in different conditions considering and not considering the arc model and compared to the statistical results of over-voltage tests. The simulation results show that generation of over-voltages is related to the phase angle of A-phase contact line, the voltage phase angle difference between contact lines of A- and B-phases and the time of locomotive getting into and out of the neutral section, a certain rule is presented. The arc model built in this paper can describe the arcing phenomenon well when locomotive passing the neutral section, and the simulation results of over-voltage are consistent with the theoretical analysis.