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A Novel Protection Scheme against Fault Resistance for AC Microgrid

Author

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  • Xinrui Liu
  • Zhiyuan Xie
  • Qiuye Sun
  • Zhiliang Wang

Abstract

The faults characteristics of the lines in AC microgrid are weakened due to the fault resistance, which may refuse protection action. To solve the problems caused by different types of the faults through fault resistance (FTFR, the faults where the fault point resistance is greater than zero) in AC microgrid, a novel FTFR protection scheme based on the active power of 0-frame component or -frame component consumed by fault resistance is proposed in this paper as the backup protection of FTFR. This proposed protection scheme utilizes the active power of 0-frame component or -frame component consumed by fault resistance to identify internal FTFR and external faults. It performs well in grid-connected mode and islanded mode by adopting self-adaptive threshold and is not affected by the factors such as the fault position and the fault resistance value. The theoretical analysis and various simulations show that this protection scheme can identify and isolate different types of internal FTFR in AC microgrid with high reliability and high sensitivity.

Suggested Citation

  • Xinrui Liu & Zhiyuan Xie & Qiuye Sun & Zhiliang Wang, 2017. "A Novel Protection Scheme against Fault Resistance for AC Microgrid," Mathematical Problems in Engineering, Hindawi, vol. 2017, pages 1-11, February.
    • Handle: RePEc:hin:jnlmpe:8419257
    DOI: 10.1155/2017/8419257
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