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SVPWM을 이용한 직류전력 회생시스템의 역률개선에 관한 연구
고영민(Young-Min Ko),채수용(Soo-Yong Chae),서영민(Young-Min Seo),정대택(Dae-Taek Jeong),배영욱(Young-Wook Bae),홍순찬(Soon-Chan Hong) 전력전자학회 2007 전력전자학술대회 논문집 Vol.- No.-
In the substations for traction systems and the large-scale discharging system of secondary batteries, the voltage of DC bus line goes up by the regenerated energy and the energy is usually wasted in resistor for system stability. This paper proposes the DC power regenerating system using a three phase PWM inverter. The proposed system can regenerate the excessive DC power from DC bus line to AC supply and control the power factor of AC supply to unity. To implement unity power factor, the magnitude of the inverter output voltage should be higher than that of AC supply and therefore SVPWM technique is adopted. Computer simulations are carried out to verify the validity of the proposed system.