摘要
为了解决低温环境下城市轨道交通运营时段频繁出现接触网覆冰的问题,总结分析了传统热力融冰方法难以进行在线融冰的原因,提出了一种以上下行接触网作为融冰电流回路的接触网在线融冰方法;结合在线融冰运行特点,设计了融冰功率单元的结构拓扑及控制策略,基于电网络模型定量分析了在线融冰方法对牵引供电系统的影响,建立了包含融冰功率单元的牵引供电系统精确动态仿真模型对在线融冰效果进行验证。结果表明:注入融冰电流后,接触网电流有效值显著提高,能够达到预期的融冰效果;最恶劣覆冰环境下2500 A融冰电流对列车造成的最大电压偏移量仅在100 V以下,在线融冰过程不影响列车及牵引所的正常工作,具有良好的工程应用前景。
In order to solve the problem of catenary icing which frequently occurs during the operation of urban rail transit in low temperature environment,the reasons why the traditional thermal ice melting method is difficult to operate online were summarized and analyzed.An online ice melting method in which the up and down catenary was adopted as ice melting current path was proposed.Considering the operation characteristics of online ice melting method,the structure topology and control strategy of ice melting power unit were designed.Based on the electric network model,the influence of online ice melting method on traction power supply system was quantitatively analyzed.The accurate dynamic simulation model of traction power supply system including ice melting power unit was established,and the online ice melting effect was verified.The results show that the RMS of catenary current is significantly improved after the injection of ice melting current,and the expected ice melting effect can be achieved.The maximum voltage offset caused by 2500 A ice melting current to the train in the worst icing environment is only below 100 V,and the online ice melting process does not affect the normal operation of the train and traction station,which has a good engineering application prospect.
作者
王运达
张钢
邱瑞昌
刘志刚
徐起阳
WANG Yunda;ZHANG Gang;QIU Ruichang;LIU Zhigang;XU Qiyang(School of Electrical Engineering,Beijing Jiaotong University,Beijing 100044,China;Rail Transit Electrical Engineering Technology Research Center,Beijing 100044,China;Hohhot Urban Rail Transit Construction Management Co.,Ltd.,Hohhot 010010,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2022年第5期1970-1978,共9页
High Voltage Engineering
基金
中央高校基本科研业务费专项基金(2018JBZ004)。
关键词
接触网
城市轨道交通
热力融冰
在线融冰
融冰功率单元
电网络模型
catenary
urban rail transit
thermal ice melting
online ice melting
ice melting power unit
electric network model
