The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Reduction of the Unbalanced Three Phase Input Current by Variable Notch Filter in Active AC Electronic Load

가변 노치필터에 의한 능동형 AC 전자부하의 3상 전류 불평형 저감

  • Kim, Do-Yun (School of Information and Communication Engineering, Sungkyunkwan University) ;
  • Lee, Jung-Hyo (School of Information and Communication Engineering, Sungkyunkwan University) ;
  • Lee, Yong-Seok (School of Information and Communication Engineering, Sungkyunkwan University) ;
  • Jung, Doo-Yong (School of Information and Communication Engineering, Sungkyunkwan University) ;
  • Jung, Yong-Chae (Dept of Electronic Engineering, Namseoul University) ;
  • Won, Chung-Yuen (School of Information and Communication Engineering, Sungkyunkwan University)
  • Received : 2011.10.06
  • Accepted : 2011.11.02
  • Published : 2012.04.20
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Abstract

In this paper, the test bed using three-phase PWM converter connected with single phase inverter in series is set up to configure an active AC electric load. Since the two topologies, three-phase PWM converter and single-phase inverter, can be operated bidirectionally, the system not only re-generates surplus power to grid but also prevents power dissipation. However, the construction of system has a drawback. That is, ripple components two times of inverter operation frequency occur at DC-Link due to cascade connection, it can be cause of three phase unbalance Since the operational characteristic of the active AC electric load, the power frequency entered into the electric load can be varied, and the ripple of DC-Link is changed as well. In this paper, the three-phase PWM converter using a variable notch filter is proposed, and the reduction of three-phase current unbalance is presented. the validity of the proposed PWM converter using a variable notch filter is verified by the simulation and experimental results.

Keywords

References

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