Volume 42 Issue 6
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MA Chunyan, GONG Ying. Status evaluation of relay protector based on an improved fuzzy-gray method[J]. Journal of Mine Automation, 2016, 42(6): 61-64. DOI: 10.13272/j.issn.1671-251x.2016.06.015
Citation: MA Chunyan, GONG Ying. Status evaluation of relay protector based on an improved fuzzy-gray method[J]. Journal of Mine Automation, 2016, 42(6): 61-64. DOI: 10.13272/j.issn.1671-251x.2016.06.015
shu

Status evaluation of relay protector based on an improved fuzzy-gray method

  • 1.

    College of Electrical and Information Engineering, University of Hubei Automotive Technology, Shiyan 442002, China

  • 2.

    College of Information Science and Engineering, University of Wuhan Science and

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    Abstract
  • For unclear and inaccurate performance of status evaluation of relay protector, an improved fuzzy-gray method was proposed for the status evaluation problem. Firstly, an index system is constructed from aspects of historical conditions, maintenance conditions and monitoring conditions. Gray point is used to describe inaccuracy of evaluation information. Then nonlinear membership functions are constructed to attain membership, so as to get fuzzy-gray matrix. Finally fuzzy-gray status evaluation for relay protector is carried out, and evaluation result is re-optimized by weighted average operator. The example shows that the method can reflect operating condition of relay protector more accurately.
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