Adaptive Transformer Inrush Current Identification Principle Based on Second Harmonic

DOI

10.2991/eame-17.2017.28How to use a DOI?

Keywords

magnetizing inrush; transformer protection; second harmonic; differential protection

Abstract

In order to prevent the maloperation of the transformer differential protection device affected by transformer magnetizing inrush current and internal short circuit fault current, the device should be able to identify the internal fault current and inrush current. Accordingly, this paper is aimed at adaptive transformer inrush current identification based on the second harmonic. The main idea is to introduce the floating threshold value on the basis of the traditional second harmonic brake and to track the change characteristics of the content of second harmonic and fundamental wave in real time. This method not only inherits the advantage of the original second harmonic braking method, but also helps to identify the internal fault and inrush current quickly, and improve the sensitivity of the magnetizing inrush current.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xinyu Wang
AU  - Bin Tian
AU  - Liqun Wu
AU  - Ling Wang
AU  - Hong Tan
PY  - 2017/04
DA  - 2017/04
TI  - Adaptive Transformer Inrush Current Identification Principle Based on Second Harmonic
BT  - Proceedings of the 2017 2nd International Conference on Electrical, Automation and Mechanical Engineering (EAME 2017)
PB  - Atlantis Press
SP  - 117
EP  - 119
SN  - 2352-5401
UR  - https://doi.org/10.2991/eame-17.2017.28
DO  - 10.2991/eame-17.2017.28
ID  - Wang2017/04
ER  -