公共交通双源无轨电车电源系统承载能力计算方法

An Approach to Calculate the Loading Capacity of the Power Supply System for Dual-source Trolleybuses in Public Transit

面向公共交通双源无轨电车运行规划,针对其电源系统承载能力评估问题,从线网电源与车载储能电源两方面入手,分析影响电源系统供电能力的约束条件.首先,建立典型拓扑下线网电源供电能力计算模型,同时基于数据统计及最小二乘参数辨识方法,确立计及多车行驶工况的双源无轨电车功率需求模型,提出以可行驶车辆数为指标的线网电源系统承载能力计算方法.然后,建立车载储能电源承载能力计算模型,提出以脱线比为核心指标的车载储能电源系统承载能力计算方法.最后,基于北京市双源无轨电车运行数据进行实例分析,计算结果与仿真的对比验证了模型的准确性,计算方法能够为双源无轨电车运行规划提供依据.

To evaluate the loading capacity of the power supply system of dual-source trolleybuses in the planning and operation of public transit system, this paper analyzes the constraints that affect the power capability of the two power supply systems from the two aspects： the catenary power supply and the on-board energy storage power supply. Power capacity calculation models of the power supply system with typical topologies are established. Meanwhile, the power demand model of dual-source trolleybuses considering multi-vehicle driving conditions is established based on the statistic data and least-squares parameter identification. The calculation method of loading capacity for catenary power system which takes the acceptable number of vehicles as an index is proposed. The calculation model for the loading capacity of the on-board energy storage power supply system is established, and its related calculation method with the off-line ratio as the core index is proposed as well. Finally,the case studies are performed based on the operation data of dual-source trolleybuses in Beijing. The comparison between the calculation and the simulation results verifies the accuracy of the model. The calculation method can provide references to the operation and planning of dual-source trolleybuses.