TITLE:
Analysis on the Effect of the Nonlinear Resistance on the Locomotive Operating Overvoltages
AUTHORS:
Zhengqing Han, Donglin Zhang, Yuning Wu, Shibin Gao
KEYWORDS:
Articulated Phase Insulator; Switching Overvoltage; Nonlinear Resistance; SIMULINK
JOURNAL NAME:
Energy and Power Engineering,
Vol.5 No.4B,
November
18,
2013
ABSTRACT: With the application of the articulated phase insulator,
and the speed of electric locomotive rising, it is inevitable for the electric
locomotive to adopt the technology automatic passing through the electric phase
separation. However, when the locomotive passes the electric phase separation,
a variety of overvoltages will be generated, such as the cut-off overvoltage
and the closing overvoltage. In this paper, the causes of the two overvoltages
above are analyzed theoretically and simulated in Simulink. Then this paper
discusses the suppression effects on the cut-off overvoltage and the closing
overvoltage by paralleling the nonlinear resistance and the main breaker, or
parallelling the nonlinear resistance and the locomotive transformer. The
simulation results show that parallelling the nonlinear resistance and the
locomotive transformer has suppressive effects on the two overvoltages
mentioned above.