地铁列车再生制动能量吸收装置应用分析

Application and Analysis of Regenerative Braking Energy Absorption Unit for Subway Trains

地铁列车再生制动能量传统处理方法是通过车载电阻吸收并以发热形式消耗散发到空气中,这种方式存在较多弊端,如列车增重、隧道温升等。较为新型的方法是在牵引供电系统的直流母线上设置能量吸收装置,将吸收的能量供给其他负荷使用。详细介绍电阻型和逆变回馈型2种再生制动能量吸收装置的工作原理和优缺点。以北京地铁10号线西钓鱼台站、首经贸站为例,对回馈至中压10 kV网络和低压400 V网络这2种逆变回馈型能量吸收装置的回馈电量比率和节能效果进行统计分析,结果表明回馈型能量吸收装置产生的经济效益可观。最后给出选型建议。

The traditional way to dispose regenerative braking energy of subway trains is to absorb via on-board resistors and then dissipate it into air by means of heating.Such a method has many disadvantages,for example:weight increase of trains,temperature rise in tunnels,etc.A relatively new method is to provide an energy absorption unit on the DC bus of the traction power supply system,which can supply the absorbed energy to other loads.The article specifies the operating principles,advantages and disadvantages of two regenerative braking energy absorption units,namely,a resistor type and an Inversion feedback type.Taking the West Diaoyutai Station and the Shoujingmao Station of Beijing Subway Line 10 for example,the article makes a statistical analysis of feedback power ratio and energy conservation effect of two inversion feedback type energy absorption units feedbacking to a network with a medium voltage of 10 kV and a network with a low voltage of 400 V.The result shows that the inversion feedback type energy absorption unit has considerable economic benefits.The article finally gives some suggestions for equipment selection.