A Study on Regenerative Breaking Energy on Electric Multiple Unit Train

초록

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