在线防冰过程中电气化铁路接触网的温度场

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. 

Temperature Field of Catenary for Electrified Railway during Online Anti-icing

Accidents of icing on catenary have great impacts on normal operation of electrical railway. In order to guarantee traction power supply, an online anti-icing technology for catenary was proposed based on the static var generator (SVG). Heat balance equations for catenary were built, and solved results were compared with test results and data provided by the TB/T 2809-2005 to prove the correctness of the technology. The temperature fields of catenary during running of the online anti-icing system were calculated, and the factors influencing temperature distribution, such as train velocity and load current, were analyzed. The analyzed result shows that when ambient temperature is -4 ℃ and target temperature is 2 ℃, maximum temperature difference of droppers and clamps will reach to 5.3 ℃, so droppers and clamps may be weakest.