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目前国内轨道交通系统大都采用电阻耗能型、逆变回馈型等方式对列车制动能量加以消耗或利用,但电阻耗能型造成了能量的浪费;逆变回馈型能量必须实时回馈电网,时间和功率的不固定性在电网负荷不大时对电网稳定性将产生一定的影响。文章通过对城轨牵引供电系统的研究、分析,提出一种超级电容储能系统结构,建立了超级电容储能装置的数学模型和计算条件,形成了相对完善的多重化控制技术。该电容型再生能量吸收利用方案已成功应用于广州地铁现场,它不仅能够将再生制动产生的能量存储起来,也可将制动能量回馈至直流牵引网,实现再生制动能量的充分利用。
At present, most of the domestic rail transit systems consume energy or utilize braking energy of the train, such as resistive energy consumption and inverter feedback type. However, the energy consumption of the resistance causes waste of energy. The energy of the inverter feedback type must be fed back to the power grid in real time. And the power of the uncertainty in the grid load is not large on the grid stability will have a certain impact. By studying and analyzing the urban rail traction power supply system, this paper presents a supercapacitor energy storage system structure, establishes the mathematical model and calculation conditions of the supercapacitor energy storage device, and forms a relatively perfect multi-control technology. The capacitive regenerative energy absorption and utilization scheme has been successfully applied to the Guangzhou Metro site. It not only stores the energy generated by regenerative braking, but also feeds back the braking energy to the DC traction network to fully utilize the regenerative braking energy.