Revisions on alpha plane for enhanced sensitivity of line differential protection

Monir Hossain; Ittiphong Leevongwat; Parviz Rastgoufard

doi:10.1109/TPWRD.2018.2840964

Revisions on alpha plane for enhanced sensitivity of line differential protection

Monir Hossain
, Ittiphong Leevongwat
, Parviz Rastgoufard

University of New Orleans Dr. Robert A. Savoie College of Engineering

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

Line current differential protection based on the traditional alpha plane may block internal faults with outfeed when providing higher security for external faults under current transformer (CT) saturation. This letter proves analytically that the external faults under CT saturation plot away from the negative real-axis of the complex plane and accordingly proposes revisions of the alpha plane characteristics. The modified alpha plane enhances the sensitivity of line current differential protection by unblocking more space along the negative real-axis where internal faults with outfeed are plotted.

Original language	English
Article number	8365757
Pages (from-to)	3260-3262
Number of pages	3
Journal	IEEE Transactions on Power Delivery
Volume	33
Issue number	6
DOIs	https://doi.org/10.1109/TPWRD.2018.2840964
Publication status	Published - Dec 2018
Externally published	Yes

Keywords

Alpha plane
CT saturation
differential protection
transmission line

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10.1109/TPWRD.2018.2840964

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title = "Revisions on alpha plane for enhanced sensitivity of line differential protection",

abstract = "Line current differential protection based on the traditional alpha plane may block internal faults with outfeed when providing higher security for external faults under current transformer (CT) saturation. This letter proves analytically that the external faults under CT saturation plot away from the negative real-axis of the complex plane and accordingly proposes revisions of the alpha plane characteristics. The modified alpha plane enhances the sensitivity of line current differential protection by unblocking more space along the negative real-axis where internal faults with outfeed are plotted.",

keywords = "Alpha plane, CT saturation, differential protection, transmission line",

author = "Monir Hossain and Ittiphong Leevongwat and Parviz Rastgoufard",

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N2 - Line current differential protection based on the traditional alpha plane may block internal faults with outfeed when providing higher security for external faults under current transformer (CT) saturation. This letter proves analytically that the external faults under CT saturation plot away from the negative real-axis of the complex plane and accordingly proposes revisions of the alpha plane characteristics. The modified alpha plane enhances the sensitivity of line current differential protection by unblocking more space along the negative real-axis where internal faults with outfeed are plotted.

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KW - Alpha plane

KW - CT saturation

KW - differential protection

KW - transmission line

UR - https://www.scopus.com/pages/publications/85047635521

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Revisions on alpha plane for enhanced sensitivity of line differential protection

Abstract

Keywords

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