第三轨供电方式下提高列车通过无电分区能力的方案

Technical Improvement of Passenger Train Passing through Electricity Free Areain Third Rail Power Supply Mode

从理论及实际运用出发,详细分析了第三轨供电的地铁列车通过无电区时出现欠压、过压、过流、第三轨端部弯头烧损等现象的具体原因,提出了在列车通过无电区时,应以恒定低电压制动模式对辅助系统功率进行精确补偿,从而减小网侧电压与列车中间电压差值的解决方案。最终,通过实测试验验证了地铁列车以恒定低电压制动方式通过无电区的有效性、可行性和经济性。

From the viewpoint of theory and practical application,the major reasons for under voltage,over voltage,over current and burning loss of the third rail bend ends when subway electric passenger train passing through the electricity free areas are analyzed in detail.A solution is proposed that the constant low voltage power braking mode shall be adopted to provide the auxiliary system with precise compensation,in order to reduce the middle voltage difference between the supply network voltage and electric passenger train.In the end,the effectiveness,feasibility and economic efficiency of the electric train with constant and low voltage braking when passing through the electricity free areas are verified by the tested data.