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Evaluation Algorithms for Multiple Function of Dispersed Electrical Energy Storage Systems

  • Son, Joon-ho (ESS Sales/Engineering Team, LG Electronics) ;
  • Choi, Sung-Sik (Dept. of Electrical Engineering, Korea University of Technology and Education) ;
  • Rho, Dae-Seok (Dept. of Electrical Engineering, Korea University of Technology and Education)
  • Received : 2018.07.06
  • Accepted : 2018.09.12
  • Published : 2018.11.01

Abstract

With the increase of electrical consumption and the unbalance of power demand and supply, power reserve rate is getting smaller and also the reliability of the power supply is getting deteriorated. Under this circumstance, the electrical energy storage (EES) System is considered as one of essential countermeasure for demand side management. This paper proposes efficient evaluation algorithms of multiple functions for EES systems, especially the secondary battery energy storage systems, in the case where they are interconnected with the power distribution systems. It is important to perform the economic evaluation for the new energy storage systems in a quantitative manner, because they are very costly right now. In this paper, the multiple functions of EES systems such as load levelling, effective utilization of power distribution systems and uninterruptible power supply are classified, and then the quantitative evaluation methods for their functions are proposed. From the case studies, it is verified that EES systems installed at distribution systems in a dispersed manner have multiple functions involved with direct and indirect benefits and also they can be expected to introduce to distribution systems with respects to economical point of view.

Acknowledgement

Supported by : Korea Institute of Energy Technology Evaluation and Planning (KETEP)

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