电气化铁路“源–网–车–储”一体化供电技术

“Source-network-train-storage” Integrated Power Supply System for Electric Railways

随着电气化铁路的高密度与高速度发展,为支撑“碳中和”愿景实现,亟需进行其用能结构的绿色化、高效能与高弹性变革。为此,立足于电气化铁路的特性与需求,构筑电气化铁路“源–网–车–储”一体化供电系统。首先,探讨“源–网–车–储”系统架构与多环节协同运行机制;其次,提出协同运行控制策略,通过“源–网–车–储”多环节联合调控,实现新能源发电与再生制动能量的高效利用,系统电能质量、稳定性与应急供电能力提升,列车柔性不断电过分相与接触网直流融冰;然后,基于牵引变电所实测负荷数据搭建仿真模型,验证了所提方案的有效性。最后,展望了发展“源–网–车–储”一体化供电系统还需突破的系列关键技术。

With the high-density and high-power development of electric railways(ERs),for achieving the vision of carbon neutrality,it is urgent to evolve the energy structure of ERs toward more low carbon,efficient,and resilient.Therefore,this paper proposed a “source-networkload-storage” integrated power supply system according to the characteristics of ERs.Firstly,the “source-networktrain-storage” system architecture and the multi-link coordination mechanism were investigated.Then,a coordinated operation control strategy was proposed to manage the “source-network-train-storage” jointly.In this way,the operational objectives,including efficient utilization of renewable energy and regenerative braking energy,improvement of the power quality,stability,and emergency power supply,were achieved.Moreover,the uninterruptible phase-separation passing of trains and the catenary DC ice melting were achieved.Based on the field load demand data of a traction substation,a simulation was built to verify the proposed strategies.Finally,a series of key technologies beneficial to the development of “source-network-trainstorage” integrated power supply system were discussed.