Experimental Tests Results of Damping Control with Over Voltage Resistor for Regenerative Brake Control of Railway Vehicle

Higher DC-link voltage of the regenerating train under the light-load regenerative brake control increases the regenerative brake power. However, if the regenerating load suddenly changes, the filter capacitor (FC) voltage of the traction inverter rises due to the delay of the motor current control, and the overvoltage protection may be activated. In this paper, damping control method to reduce the peak of FC voltage using the over voltage resistor (OVRe) is examined by experimental test in Odakyu Tama Line. Then, the peak of FC voltage is decreased when the dumping control with OVRe is working.