基于能量守恒的弓网电弧建模研究

Principle of Energy Conservation Based Study on Arc Modeling of Pantograph-Catenary

按照弓网电弧能量守恒微分方程,建立简单有效的弓网电弧确定性模型。在对牵引供电系统各组成部分进行参数计算的基础上,建立了牵引供电简化电路模型。将提出的弓网电弧模型以电流控制电压源形式直接接入牵引供电测试系统,对弓网电弧引起的电压波动问题进行仿真分析。仿真结果与实际系统动态特性完全相符,从而验证了模型的正确性。该仿真模型的建立,为理解弓网电弧非线性时变特性,研究弓网电弧导致的电力机车受流质量问题,进行谐波治理与弓网电弧抑制研究提供了研究基础。

An accurate deterministic model of pantograph-catenary arc is established through the differential equation based on the principle of energy conservation.Through the parameters calculation of the main parts of the traction power supply system,the simplified circuit model of the traction power supply system.Then acting as a variable voltage source controlled by arc current,the pantograph-catenary arc model is connected to the traction power supply test system.And the voltage fluctuation of the load caused by pantograph-catenary arc is simulated and analyzed.The proposed model demonstrates the dynamic characteristics of the actual pantograph-catenary arc,the model is proved to be correct.The research basis is supplied to understand the nonlinear time varying characteristics of the pantograph-catenary arc,to study the current receiving quality of electric train,to decrease the influences of harmonics and arc by the pantograph-catenary arc simulated model.