The rapid development of electric buses has brought a surge in the number of bus hubs and their charging and discharging capacities.Therefore,the location and construction scale of bus hubs will greatly affect the ope...The rapid development of electric buses has brought a surge in the number of bus hubs and their charging and discharging capacities.Therefore,the location and construction scale of bus hubs will greatly affect the operation costs and benefits of an urban distribution network in the future.Through the scientific and reasonable planning of public transport hubs on the premise of meeting the needs of basic public transport services,it can reduce the negative impact of electric bus charging loads upon the power grids.Furthermore,it can use its flexible operation characteristics to provide flexible support for the distribution network.In this paper,taking the impact of public transport hub on the reliability of distribution network as the starting point,a three-level programming optimization model based on the value and economy of distribution network load loss is proposed.Through the upper model,several planning schemes can be generated,which provides boundary conditions for the expansion of middle-level optimization.The normal operation dispatching scheme of public transport hub obtained from the middle-level optimization results provides boundary conditions for the development of lower level optimization.Through the lower level optimization,the expected load loss of the whole distribution system including bus hub under the planning scheme given by the upper level can be obtained.The effectiveness of the model is verified by an IEEE-33 bus example.展开更多
To increase the passenger transferring efficiency, the bus coordination holding control for transit hubs, which is as an important dynamic dispatching method for improving the service level of transit hubs, was studie...To increase the passenger transferring efficiency, the bus coordination holding control for transit hubs, which is as an important dynamic dispatching method for improving the service level of transit hubs, was studied in the framework of bus coordination dispatching mode. Firstly, the bus coordination holding control flow was studied based on Advanced Public Transportation Systems (APTS) environment. Then a control model was presented to optimize the bus vehicle holding time, and a genetic algorithm was designed as the solving method. In the end, an example was given to illustrate the effectiveness of the control strategy and the algorithm.展开更多
对公交枢纽(public transport hub, PTH)进行最优并网规划是提升城市客运服务效率及配电网运行效率的重要途径。为此,在深入分析智能公交枢纽与配电网交互机理的基础上,分别考虑正常和故障情况下PTH需求响应对系统的影响,提出了一种面...对公交枢纽(public transport hub, PTH)进行最优并网规划是提升城市客运服务效率及配电网运行效率的重要途径。为此,在深入分析智能公交枢纽与配电网交互机理的基础上,分别考虑正常和故障情况下PTH需求响应对系统的影响,提出了一种面向促进配网可靠性和经济性提升的PTH三层规划优化模型。该模型上层以配网投资运行总成本最小为目标,优化PTH布设位置以及电动公交/充电桩布置数量。中层在满足公交服务需求的前提下以正常运行PTH从配网购电最小为目标,优化发车间隔和公交车充电计划。下层以配网故障情况下系统停电损失最小为目标,优化故障时发车间隔、负荷削减量以及电动公交的发车状态和充放电功率。设计多层求解算法实现上述模型的高效求解。最后,基于IEEE33节点系统的仿真结果验证了所提规划方法能够充分挖掘PTH资源的灵活性潜力,兼顾配网运行经济性和可靠性。展开更多
作为城市交通基础设施的重要组成部分,公交枢纽(public transport hub,PTH)是城市能源和交通系统的耦合汇聚节点。如何实现PTH和城市配电系统的有机协调发展,在满足公交服务需求的前提下,尽可能地降低电动公交负荷并网的负面影响,并利...作为城市交通基础设施的重要组成部分,公交枢纽(public transport hub,PTH)是城市能源和交通系统的耦合汇聚节点。如何实现PTH和城市配电系统的有机协调发展,在满足公交服务需求的前提下,尽可能地降低电动公交负荷并网的负面影响,并利用其运行灵活性促进电力系统提质增效,已成为未来城市规划的重要课题。为此,该文在深入分析PTH与配电网交互机理的基础上,分别考虑正常和故障情况下PTH参与电网侧需求响应的贡献,提出一种面向PTH灵活性赋能的高可靠性城市配电网多层协同规划方法。模型以系统投资运维总成本最小化为目标,综合考虑电力-交通系统运行和供电可靠性/公交服务质量等多域约束,通过对PTH选址定容、配电线路/变压器扩容以及正常/故障多模场景下系统运营策略进行协同优化,以实现PTH灵活性资源的高效利用和配电系统的可靠经济运行。根据模型中多元场景密切耦合的特点,提出多层Benders分解方法将其等效转化为上层(投资主问题)、中层(正常运行子问题)、下层(故障运行子问题)的三层迭代模型,实现精确高效求解。最后,以修改的IEEE-33节点配电网和北京四惠公交枢纽的实际数据为例,验证了所提模型和方法的有效性。展开更多
文摘The rapid development of electric buses has brought a surge in the number of bus hubs and their charging and discharging capacities.Therefore,the location and construction scale of bus hubs will greatly affect the operation costs and benefits of an urban distribution network in the future.Through the scientific and reasonable planning of public transport hubs on the premise of meeting the needs of basic public transport services,it can reduce the negative impact of electric bus charging loads upon the power grids.Furthermore,it can use its flexible operation characteristics to provide flexible support for the distribution network.In this paper,taking the impact of public transport hub on the reliability of distribution network as the starting point,a three-level programming optimization model based on the value and economy of distribution network load loss is proposed.Through the upper model,several planning schemes can be generated,which provides boundary conditions for the expansion of middle-level optimization.The normal operation dispatching scheme of public transport hub obtained from the middle-level optimization results provides boundary conditions for the development of lower level optimization.Through the lower level optimization,the expected load loss of the whole distribution system including bus hub under the planning scheme given by the upper level can be obtained.The effectiveness of the model is verified by an IEEE-33 bus example.
基金Sponsored by the National Natural Science Foundation of China (Grant No. 70601022)the National Basic Research Program of China (Grant No.2006CB705505)
文摘To increase the passenger transferring efficiency, the bus coordination holding control for transit hubs, which is as an important dynamic dispatching method for improving the service level of transit hubs, was studied in the framework of bus coordination dispatching mode. Firstly, the bus coordination holding control flow was studied based on Advanced Public Transportation Systems (APTS) environment. Then a control model was presented to optimize the bus vehicle holding time, and a genetic algorithm was designed as the solving method. In the end, an example was given to illustrate the effectiveness of the control strategy and the algorithm.
文摘对公交枢纽(public transport hub, PTH)进行最优并网规划是提升城市客运服务效率及配电网运行效率的重要途径。为此,在深入分析智能公交枢纽与配电网交互机理的基础上,分别考虑正常和故障情况下PTH需求响应对系统的影响,提出了一种面向促进配网可靠性和经济性提升的PTH三层规划优化模型。该模型上层以配网投资运行总成本最小为目标,优化PTH布设位置以及电动公交/充电桩布置数量。中层在满足公交服务需求的前提下以正常运行PTH从配网购电最小为目标,优化发车间隔和公交车充电计划。下层以配网故障情况下系统停电损失最小为目标,优化故障时发车间隔、负荷削减量以及电动公交的发车状态和充放电功率。设计多层求解算法实现上述模型的高效求解。最后,基于IEEE33节点系统的仿真结果验证了所提规划方法能够充分挖掘PTH资源的灵活性潜力,兼顾配网运行经济性和可靠性。
文摘作为城市交通基础设施的重要组成部分,公交枢纽(public transport hub,PTH)是城市能源和交通系统的耦合汇聚节点。如何实现PTH和城市配电系统的有机协调发展,在满足公交服务需求的前提下,尽可能地降低电动公交负荷并网的负面影响,并利用其运行灵活性促进电力系统提质增效,已成为未来城市规划的重要课题。为此,该文在深入分析PTH与配电网交互机理的基础上,分别考虑正常和故障情况下PTH参与电网侧需求响应的贡献,提出一种面向PTH灵活性赋能的高可靠性城市配电网多层协同规划方法。模型以系统投资运维总成本最小化为目标,综合考虑电力-交通系统运行和供电可靠性/公交服务质量等多域约束,通过对PTH选址定容、配电线路/变压器扩容以及正常/故障多模场景下系统运营策略进行协同优化,以实现PTH灵活性资源的高效利用和配电系统的可靠经济运行。根据模型中多元场景密切耦合的特点,提出多层Benders分解方法将其等效转化为上层(投资主问题)、中层(正常运行子问题)、下层(故障运行子问题)的三层迭代模型,实现精确高效求解。最后,以修改的IEEE-33节点配电网和北京四惠公交枢纽的实际数据为例,验证了所提模型和方法的有效性。
