地铁列车再生制动对牵引网电压影响的研究

Study on impact of metro train regenerative brake on traction network voltage

过去地铁列车制动主要采用车载电阻制动,这种传统的制动方式会造成能量浪费,并且制动时还会产生大量的热,导致隧道内环境温度升高。近几年地铁列车普遍开始采用再生制动,但再生制动产生的电能不能被完全吸收利用时,多余电能会引起直流牵引网电压迅速升高,使得用电不安全。为了使再生制动产生的多余能量能被吸收,并且牵引网电压稳定,引入了逆变回馈系统,通过仿真软件MATLAB/SIMULINK验证当地铁列车再生制动装置投入使用时牵引网电压的变化以及牵引电机运行状态。

In the past, metro trains mainly used onboard resistance braking. This traditional braking mode resulted in energy waste, and a large amount of heat generated during braking, causing tunnel ambient temperature rise. In recent years, metro trains generally use regenerative braking. However, when the regenerative braking power fails to be fully absorbed, excess power causes DC traction network voltage rise rapidly, making the power utilization unsafe. In order to absorb the excess energy generated by regenerative braking and to stabilize the traction network voltage, an inverter feedback system is introduced. The change of the traction network voltage and the motor running status are verified by the simulation software MATLAB/SIMULINK when a metro train regenerative braking is put into operation.