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

The Korean Institute of Power Electronics (전력전자학회)
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A Seamless Control Method for Supercapacitor to Compensate Pulsed Load in DC Microgrid

직류 마이크로그리드에서 펄스형 부하 보상용 슈퍼커패시터 무순단 제어법

  • Received : 2017.10.24
  • Accepted : 2018.06.01
  • Published : 2018.08.20
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Abstract

This paper proposes a new control method for the supercapacitor (SC) to compensate the pulsed load and to enhance the power quality of the DC microgrid. By coordinating the operating frequency, the SC is controlled to handle the surge current, while the low-frequency current component is dealt with by the remaining sources in the system. The operation mode of the SC unit is automatically changed based on the state of charge and DC bus voltage level. Meanwhile, the mismatch in the power demand is covered by the SC unit by regulating the DC bus voltage level. The effectiveness of the proposed method is verified experimentally by the prototype with two distributed generators and one SC unit.

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References

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