A Study on Regenerative Breaking Energy on Electric Multiple Unit Train

초록

With regard to the electric power quality in electric railway system, the damage was occurred by various causes including malfunction of the on-board equipment, inductive disturbance of communication cable, power loss by resonance of high harmonics, damage of weak electric equipment, malfunction of protective relay and increased loss by deteriorated power quality and so on. The power quality problems is also attributable to using various types of railroad vehicles from old model motor car using diode rectifier to KTX using semi-bridge rectifier, motorized car using PWM control inverter or VVVF control. Despite of high harmonics with various orders, electric braking using regenerative braking has been adopted, which causes deteriorated electric power quality and the negative effect on high harmonics and voltage fluctuation, leading to increasing malfunction. Thus, the range of higher harmonics and voltage fluctuation are strictly limited by domestic electric facility standard or IEC standard. In addition, the study in an effort to enhance the electric power quality has been underway. The efforts to evaluate the electric