Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)

The Korean Institute of Power Electronics (전력전자학회)
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New Control Scheme for LIDVR Considering Asymmetry Input Voltage Conditions

비대칭 입력 전압 상태를 고려한 LIDVR의 새로운 제어방법

  • Han Chul-Woo (Dept. of Electrical Engineering, Hanyang Univ.) ;
  • Kim Tae-Jin (Dept. of Electrical Engineering, Hanyang Univ.) ;
  • Kang Dae-wook (Dept. of Electrical Engineering, Hanyang Univ.) ;
  • Hyun Dong-Seok (Dept. of Electrical Engineering, Hanyang Univ.)
  • 한철우 (한양대학교 전기공학과) ;
  • 김태진 (한양대학교 전기공학과) ;
  • 강대욱 (한양대학교 전기공학과) ;
  • 현동석 (한양대학교 전기공학과)
  • Published : 2002.07.01
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Abstract

Power Quality and reliability are becoming important issues for critical and sensitive loads. The recent growth in the use of impactive and nonlinear loads has caused many power quality problems such as voltage flicks, harmonics and unbalances, which may cause the modem automatic devices to fail, misoperate, or shut down. This paper deals with 7-Level H-Bridge Line-Interactive Dynamic Voltage Restorer (LIDVR) system. It has the power factor near to unity under normal source voltage, can compensate the harmonic current of the load and instant interruption, and has the fast response. Currently, most of the DVR design studies are based on the assumption of the balanced three-phase system. But, actually line fault occurred $1{\phi}\;{sag}\;or\;2{\phi}$ sag. Hence, proposed new control scheme compensate asymmetry input voltage. Finally, simulation results verify the proposed 7-Level H-Bridge LIDVR system.

Keywords