The invention relates to an arc net off-line
electric arc mathematical model for calculating the
train speed. According to the site operation measured data that a high speed railway arc net off-line
electric arc changes along with the
train speed and the maximum off-line distance, and in accordance with the Habedank
electric arc model, the
voltage gradient constant and the wasted power constant of the electric
arc model are revised, the electric arc dynamic
mathematical model which is simple, effective and applicable to an arc net
system is established, and the influence of different
model parameter values on the dynamic property of the arc net electric
arc model is analyzed in details. The proposed arc net electric
arc model is introduced into an off-line process, and when the arc net is subjected to middle off-line, the off-line
overvoltage of the arc net at different
train speeds is simulated and analyzed; in addition, when the arc net is subjected to small off-line, the
simulation result and the measured result of an arc net electric arc testing
system are compared so as to verify the
correctness of the established arc net electric arc
mathematical model. The invention provides an effective tool for
simulation study of the electrified railway arc net off-line electric arc and the transient process of the electrified railway arc net off-line electric arc and the transient process.