Journal of Electrical Engineering and Technology

The Korean Institute of Electrical Engineers (대한전기학회)
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Economic Evaluation of ESS in Urban Railway Substation for Peak Load Shaving Based on Net Present Value

  • Park, Jong-young (Smart Station Research Team, Korea Railroad Research Institute) ;
  • Heo, Jae-Haeng (Power System Research Team, Master's Space Co. Ltd.) ;
  • Shin, Seungkwon (Smart Station Research Team, Korea Railroad Research Institute) ;
  • Kim, Hyungchul (Smart Station Research Team, Korea Railroad Research Institute)
  • Received : 2016.07.18
  • Accepted : 2017.01.11
  • Published : 2017.03.01
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Abstract

In this paper, we estimate the economic benefits of Energy Storage Systems (ESSs) for peak load shaving in an urban railway substation using the annual cost. The annual investment cost of ESSs is estimated using Net Present Value (NPV) and compared with the cost reduction of electricity by the ESS. The optimal capacities of the battery and Power Converting System (PCS) are determined for peak load shaving. The optimal capacity of the ESS and the peak load shaving is determined to maximize the profit by the ESS. The proposed method was applied to real load data in an urban railway substation, and the results show that electric power costs can be reduced. Other aspects of the ESS, such as the lifetime and unit price of the battery, are also investigated economically.

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References

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