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

The Korean Institute of Power Electronics (전력전자학회)
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Effective Voltage Quality Control under Nonlinear Loads in Islanded Microgrid

독립형 마이크로그리드에서 비선형 부하에 대한 고품질 전압제어

  • Dam, Hung D. (School of Electrical Eng., University of Ulsan) ;
  • Lee, Hong-Hee (School of Electrical Eng., University of Ulsan)
  • Received : 2016.05.24
  • Accepted : 2016.09.01
  • Published : 2016.12.20
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Abstract

A nonlinear load causes harmonic distortion and hampers the performance of other loads or distributed generation (DG) sources connected to the point of common coupling (PCC). This study proposes a new control strategy to reduce harmonic components, such as fifth and seventh harmonics, at the PCC under nonlinear loads in islanded microgrids, which comprise more than two DG sources. The proposed control scheme enables the DG source to share the power commanded by the control center as well as to compensate for the voltage harmonics at the PCC. The reference current is estimated from the voltage harmonics and injecting power; thus, the control scheme is implemented without any additional hardware devices. The simulation and experimental results are presented to verify the effectiveness of the proposed control method.

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References

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