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接触网覆冰严重影响电气化铁路安全运营,为确保牵引供电的可靠性,提出了一种基于静止无功发生装置的接触网在线防冰方案.针对该方案建立了在线防冰时接触网系统的动态热平衡方程,并通过分别对比铁路运输行业标准TB/T 2809—2005和实验测试数据进行了验证.在此基础上,分析了防冰系统运行后接触网系统的动态温度变化和温度场分布,并探讨了机车速度和负载电流对温度场分布的影响.分析结果表明,环境温度为-4℃,目标温度为2℃时,吊弦及其线夹处温差可达5.3℃,可能成为最薄弱环节.
In order to ensure the reliability of traction power supply, an ice protection scheme of catenary based on static reactive power generation device is put forward.Aiming at this scheme, an online anti-icing catenary system is established Dynamic heat balance equation and verified by the railway industry standard TB / T 2809-2005 respectively and the experimental test data.On the basis of this, the dynamic temperature and temperature distribution of the catenary system after the anti-icing system is analyzed, And the influence of locomotive speed and load current on the temperature distribution is discussed.The results show that the temperature difference is -4 ℃ and the target temperature is 2 ℃, the temperature difference between the string and its clamp can reach 5.3 ℃, which may be the weakest Links.