A study on the DC Capacitor Voltage control of 5 Level Inverter for Static Var Compensator

자려식 SVC용 5레벨 인버터의 직류측 콘덴서 전압제어에 관한 연구

  • 김종윤 (한국해양대학교 대학원) ;
  • 오진석 (한국해양대학교 운항시스템공학부) ;
  • 공관식 (부산·울산 중소기업청 조선기자재 센터장)
  • Published : 1999.03.01


A five-level VSI(Voltage Source Inverter) is introduced as a SVC(Static Vu Compensator) like a large scale power source. The problems in using SVC are that the power device can easily be destroyed by voltage unbalance and accurate reactive power control is difficult because of voltage variation. A asymmetrical PAM(Pulse Amplitude Modulation) switching pattern is proposed to solve this problem and analyze both fundamental component and harmonic current in the system. Through experimental results of 3.5 kVA experimental test system, It is confirmed that DC capacitor voltage can be controlled by asymmetrical PAM switching pattern control.