A Study on Parallel Operation of PWM Converter for Auxiliary bloc High Speed Train

고속전철 보조전원장치용 PWM 컨버터의 병렬운전에 관한 연구

In auxiliary block of high speed train power factor correction and harmonics reduction is very important issue for efficient energy transport. The GTO-equipped PWM converter is used for traction untill resently. But the rising power capability of IGBTs resently allows to build IGBT-equipped PWM converter with a considerably increased switching frequency. This paper presents switching pattern, control method, operation mode and tuned filter to reduce dc link voltage ripple for paralleled converter.