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Utilization of Energy Storage System based on the Assessment of Area of Severity in Islanded Microgrid

  • Lee, Kyebyung (School of Electrical Engineering, Korea University) ;
  • Yoon, Minhan (Dept. of Electrical Engineering, Tongmyong University) ;
  • Park, Chang-Hyun (Dept. of Electrical Engineering, Pukyong National University) ;
  • Jang, Gilsoo (School of Electrical Engineering, Korea University)
  • Received : 2016.07.09
  • Accepted : 2016.12.25
  • Published : 2017.03.01

Abstract

This paper proposes a method to utilize an energy storage system (ESS) based on the assessment of an area of severity (AOS) to voltage sag. The AOS is defined as a set of the fault positions that can cause voltage sags at many buses simultaneously. The assessment of AOS helps to determine an optimal location of ESS installation to minimize the expected sag frequency (ESF) at concerned buses. The ESS has the ability not only to play traditionally known roles but also to mitigate voltage sag impact on renewable energy sources (RES) in the islanded microgrid. Accordingly, using the proposed method the ESS has additional features to prevent the operation failure of RESs and improve the stability of the microgrid. In order to verify the presented method, a case study was conducted on the sample microgrid system that is modified from an IEEE 57-bus system.

Keywords

Voltage sag;Stochastic assessment;Area of severity (AOS);Microgrid;energy storage system (ESS)

Acknowledgement

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

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