摘要
城市轨道交通线路涉及面积广、周边环境复杂,在土壤湿度、运营损耗等因素影响下,走行轨绝缘往往存在不均匀的情况,对系统钢轨电位与杂散电流分布产生明显影响.提出轨道绝缘非均匀情况下回流系统建模方法,利用不同的绝缘非均匀情况对回流系统进行分割,并进行精确等效,参与多区间系统潮流计算,根据切面边界参数,计算该情况下钢轨电位与杂散电流分布.基于某实际线路数据仿真分析了多区间不同绝缘薄弱类型以及动态接地情况下钢轨电位与杂散电流分布规律,并进行现场实测验证.研究结果表明:多区间绝缘非均匀情况对钢轨电位与杂散电流分布影响较大,应在钢轨电位与杂散电流控制中予以重视.
Urban rail transit lines cover a wide area and the surrounding environment is complex. There are many inevitable factors, such as the soil humidity and operating loss, lead to the non-uniform insulation of the running rails. They will have a significant impact on the distribution of rail potential and stray current in DC Traction Power Supply System(TPSS).In this paper, the modeling method of rail potential and stray current under non-uniform insulation of the running rails is proposed. The reflux system is partitioned using different insulation non-uniformity, and is precisely equivalent. The equivalent model participates in the power flow calculation of multiple section in the system. According to the boundary parameters, the distribution of rail potential and stray current can be calculated. Based on the parameters of a real railway line, the distribution of rail potential and stray current under different types of insulation weakness and dynamic grounding in multiple sections are simulated and verified by field tests. Results show that the non-uniformity insulation of multiple sections has a great influence on the rail potential and stray current, and it should be paid more attention on the control of rail potential and stray current.
作者
郑子璇
杜贵府
朱成乾
ZHENG Zixuan;DU Guifu;ZHU Chengqian(School of Rail Transportation,Soochow University,Suzhou Jiangsu 215131,China)
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2020年第3期66-78,共13页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
国家自然科学基金(51607179)。
