城市轨道交通再生制动能量利用研究

Research of regenerative braking energy utilization in urban rail transit

为利用地铁列车产生的再生制动能量,降低直流牵引网电压以保证电网稳定,在原有电阻耗能型装置的基础上增加逆变回馈功能,设计了一种逆变-电阻混合型回馈装置。主要阐述该装置的设计方法、硬件组成及控制方法,通过对直流牵引网列车制动工况模拟仿真,并将仿真结果与纯电阻耗能仿真对比分析。证实该混合装置可在列车制动时快速降低并稳定牵引网电压,较大程度地改善了隧道内的电阻发热问题,同时将直流牵引网能量逆变为三相交流电后并网,提高了再生制动能量利用率。证实该系统设计可实现再生制动能量的高效吸收及列车安全稳定的运行。

In order to utilize the regenerative braking energy generated by subway trains and reduce the voltage of DC traction network to ensure the stability of the power grid,an inverter⁃resistor hybrid feedback device is designed on the basis of adding the inverter feedback function to the original resistance energy dissipation device.The design method,hardware composition and control method are mainly expounded.The simulation of the braking condition of the DC traction network train is implemented,and the simulation results are compared with the simulation of pure resistance energy dissipation.It is proved that the hybrid device can quickly lower and stabilize the traction network voltage during train braking,which relieves the resistance heating in the tunnel.Meanwhile,the DC traction network energy is inverted into three⁃phase AC and connected to the grid,which improves the regenerative braking energy utilization rate.It is verified that the system design can realize efficient absorption of regenerative braking energy and safe and stable operation of the train.