Journal of Electrical Engineering and Technology

The Korean Institute of Electrical Engineers (대한전기학회)
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AC and DC Microgrids: A Review on Protection Issues and Approaches

  • Mirsaeidi, Sohrab (Department of Electrical Engineering, Tsinghua University) ;
  • Dong, Xinzhou (Department of Electrical Engineering, Tsinghua University) ;
  • Shi, Shenxing (Department of Electrical Engineering, Tsinghua University) ;
  • Wang, Bin (Department of Electrical Engineering, Tsinghua University)
  • Received : 2017.02.15
  • Accepted : 2017.05.24
  • Published : 2017.11.01
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Abstract

Microgrid is a convenient, reliable, and eco-friendly approach for the integration of Distributed Generation (DG) sources into the utility power systems. To date, AC microgrids have been the most common architecture, but DC microgrids are gaining an increasing interest owing to the provision of numerous benefits in comparison with AC ones. These benefits encompass higher reliability, power quality and transmission capacity, non-complex control as well as direct connection to some DG sources, loads and Energy Storage Systems (ESSs). In this paper, main challenges and available approaches for the protection of AC and DC microgrids are discussed. After description, analysis and classification of the existing schemes, some research directions including coordination between AC and DC protective devices as well as development of combined control and protection schemes for the realization of future hybrid AC/DC microgrids are pointed out.

Keywords

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