城市轨道交通低碳节能技术下牵引供电系统仿真分析

Simulation Analysis of Traction Power Supply System under Urban Rail Transit Low-carbon Energy-saving Technologies

目的:针对目前多项低碳节能技术同时应用到一条城市轨道交通(以下简称“城轨”)线路上的节能效果尚缺乏评估,无法为最优节能方案的制定与决策提供支撑,因此需要通过多种低碳节能技术下牵引供电系统的仿真分析研究其节能效果。方法:介绍了城轨牵引能耗的构成。从供电设备、牵引电机类型、列车质量及行车组织等多个角度出发,介绍了双向变流技术、永磁同步牵引传动技术、列车轻量化及列车驾驶策略与运行图优化等4种低碳节能技术的原理及特点。搭建了城市轨道交通牵引供电系统仿真平台。以国内某地铁线路为研究背景,对牵引供电系统进行仿真建模,分析了多种低碳节能技术单独应用与综合应用的节能效果。结果及结论:永磁同步牵引电机效率更高,其消耗电能不仅低于异步牵引电机,且其再生能量也高于异步牵引电机;整流装置采用双向变流器的条件下,牵引网损耗减小了7.88 kWh,节能率达16.00%;列车采用铝合金车体后,相同行驶条件下消耗的电能较优化前减少了39.70 kWh,节能率为2.75%;列车运行图优化后,列车消耗电能比优化前减少了48.56 kWh,节能率为3.37%;多种低碳节能技术综合应用的条件下可将牵引供电系统节能率提升至15.79%,节能效果明显。

Objective:In the context of multiple low-carbon energy-saving technologies being simultaneously applied to an URT(urban rail transit)line without yet an evaluation on their energy-saving effects,and the inability to provide support for optimal energy-saving scheme formulation and decision-making,it is aimed to analyze the energy-saving effects of traction power supply systems under various low-carbon energy-saving technologies through simulation analysis.Method:The composition of URT traction energy consumption is introduced.From the perspectives of power supply equipment,traction motor types,train mass,and operational organization,the principles and features of four low-carbon and energy-saving technologies are discussed:bidirectional converter technology,permanent magnet synchronous traction drive technology,train lightweighting,train driving strategy and timetable optimization.An URT traction power supply system simulation platform is constructed.Using a metro line in China as the research background,the traction power supply system is simulated and modeled to analyze the energy-saving effects of the single application or combined application of the multiple mentioned technologies.Result and Conclusion:Permanent magnet synchronous traction motors exhibit higher efficiency and consume less energy compared to asynchronous traction motors,and their regenerative energy is higher.Under the condition of employing bidirectional converters for rectification,traction network loss decreases by 7.88 kWh,achieving a 16.00%energy-saving rate.After adopting aluminum alloy train body,the energy consumption decreases by 39.70 kWh under similar driving conditions compared to pre-optimization,with a 2.75%energy-saving rate.With the train timetable optimization,the energy consumption reduces by 48.56 kWh compared to pre-optimization,achieving a 3.37%energy-saving rate.Under the combined application of multiple low-carbon energy-saving technologies,the energy-saving rate of the traction power supply system can be increased to 15.79%,demonstrating a significant energy-saving effect.