为降低城轨牵引供电系统中的能源消耗，对多种新型城轨供电系统的节能策略开展研究。首先，基于传 统潮流计算求解方法，建立城市轨道交通牵引供电系统的等效电路模型，并考虑城轨车辆牵引能量的非线性特性 及多车模型中的等效电路变化。然后，利用等效电路模型以及各节点电压，设计系统的潮流解析方法。最后，结 合合肥市轨道交通1 号线相关数据，利用多列车运行仿真模拟结果，分析现有牵引供电系统与逆变回馈、储能、 光伏3 种新型牵引供电系统的牵引变电站功率、电压、能耗等指标。研究结果表明：相比于现有牵引供电系 统，具有逆变回馈的牵引供电系统可以显著减小牵引变电所能耗，具有储能系统的牵引供电系统能够有效降低牵 引变电所峰值功率，具有光伏系统的牵引供电系统可减小24.89%的牵引变电站能耗。研究结果以期为提高城市轨 道交通的节能减排效率提供参考。

To enhance the energy efficiency of urban rail traction power-supply systems, this study investigated various strategies aimed at reducing energy consumption. An equivalent circuit model of an urban rail transit traction power supply system was initially developed based on traditional power flow calculation methods. This model considered the nonlinear characteristics of traction energy for urban rail vehicles and variations in the equivalent circuit within a multivehicle context. Subsequently, a power flow analysis method was devised utilizing the established equivalent circuit model and node voltages. Finally, using data from Hefei rail transit line 1 and results from multitrain operation simulations, the study analyzed power, voltage, and energy consumption across different traction power-supply configurations: existing systems and three new systems integrating inverter feedback, energy storage, and photovoltaic technologies. The findings indicate significant advantages for the new systems: the system with inverter feedback notably reduces traction substation energy consumption, while the energy storage system effectively reduces peak power demands. Additionally, the system incorporating photovoltaic technology achieves a substantial 24.89% reduction in traction substation energy consumption compared to the existing setup. These results serve as a valuable reference for optimizing energy efficiency and emissions reduction efforts in urban rail transit systems, offering insights into practical strategies for enhancing operational sustainability.

U231

广东省自然科学基金(2023A1515012949)