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The Korean Institute of Electrical Engineers (대한전기학회)
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Power Allocation Method for Multiple ESS Control Considering SOC Balancing in Microgrids

마이크로그리드에서 SOC균형을 고려한 ESS의 충·방전 전력배분 방법

  • Lee, Sang-Wook (Dept. of Electrical and Computer Engineering, Pusan National University) ;
  • Park, Juneho (Dept. of Electrical and Computer Engineering, Pusan National University)
  • Received : 2017.01.18
  • Accepted : 2017.01.24
  • Published : 2017.02.01
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Abstract

In this paper, multiple ESS(Energy Storage System) control strategy for microgrids is presented. Installation of ESS becomes mandatory when microgrids are used to supply high quality power to the loads. The one of main functions of the ESS is to maintain power balance. However ESS has limitation of its capacity and instantaneous injecting power. Power allocation method based on SOC(State Of Charge) of each ESS is proposed. P-Q control is employed as the basic control strategy for the distributed ESSs. By using the proposed method, the coefficients in the conventional P-Q control method are modified. The ESSs with higher SOC inject more active power, while those with lower SOC inject less, leading to more balanced SOC levels among the ESSs. The proposed method is demonstrated by simulation using PSCAD/EMTDC.

Keywords

References

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