基于改进Mayr模型的弓网离线电弧仿真分析

弓网离线电弧对受电弓滑板和接触网导线具有烧饬作用,严重危害列车的运行安全。首先介绍Mayr电弧模型,并基于能量平衡理论和横向吹弧理论,对弓网离线电弧弧柱的能量过程进行数学分析,研究高速气流对电弧耗散功率的影响。确立电弧耗散功率Ploss和车速v、电流I和离线间距l之间的函数关系,对Mayr电弧模型进行改进。然后运用Simulink仿真软件,搭建改进的Mayr电弧模型。最后对比分析弓网离线电弧仿真波形和实验波形,验证搭建的弓网离线电弧模型的合理性。结论如下:随着列车运行速度提高和离线间距的增大,气流对电弧的吹弧作用更加显著,电弧耗散功率增加,燃弧尖峰电压和熄弧尖峰电压增大。

Simulation Analysis of Pantograph-Catenary Arc Based on Improved Mayr Model

Pantograph-catenary arc is likely to burn pantograph strip and contact wire, which seriously endangers the safe operation of the train.This paper introduces the Mayr arc model and analyzes the energy process of the pantograph-catenary arc column based on the theory of energy balance and the theory of transverse blowing arc,and the effect of the high speed airflow on the arc dissipation power is studied. The relationship between the arc dissipation power Ploss,the train speed v,the current I and the off-line spacing l is defined and Mayr arc model is improved. Then,the improved Mayr arc model is built with Simulink simulation software. Finally,the simulation waveforms and experimental waveforms are compared and analyzed,and the rationality of the arc model is verified. The results show that with the increase of the train speed the effect of the airflow on the arc is getting more significant; the power consumption of the arc,the peak arcing voltage and the peak arc extinction voltage increase.