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

The Korean Institute of Power Electronics (전력전자학회)
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Design of DC Battery Size & Controller for Household Single-Phase ESS-PCS Considering Voltage Drop and DC Link Voltage Ripple

주택용 단상 ESS-PCS의 전압손실과 직류링크 맥동을 고려한 직류측 배터리 사이즈 및 제어기 설계

  • Kim, Yong-Jung (Dept. of Electrical, Electronic and Control Eng., Kongju National University) ;
  • Lee, Jinsung (Dept. of Electrical, Electronic and Control Eng., Intech-FA) ;
  • Kim, Hyosung (Div. of Electrical, Electronic and Control Eng., Kongju National University)
  • Received : 2018.01.04
  • Accepted : 2018.02.20
  • Published : 2018.04.20
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Abstract

Generally, in a single-phase energy storage system (ESS) for households, AC ripple component with twice the fundamental frequency exists inevitably in the DC link voltage of single-phase PCS. In the grid-connected mode of a single-phase inverter, the AC ripple component in the DC link voltage causes low-order harmonics on grid-side current that deteriorates power quality on an AC grid. In this work, a control system adopting a feedforward controller is established to eliminate the AC ripple interference on the DC link side. Optimal battery nominal voltage design method is also proposed by considering the voltage loss and AC ripple voltage on DC link side in a single-phase ESS. Finally, the control system and battery nominal voltage design method are verified through simulations and experiments.

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References

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