Identifying internal faults of transformers through the similarity degree between voltage and current

A new principle of transformer differential protection is presented in this paper. By comparing the voltage on the source side and the differential current in a specific time interval. An internal fault in a transformer can be discriminated. The differential protection scheme based on the new princi...

Full description

Saved in:
Bibliographic Details
Main Authors: Shang Guocai, Yu Dachuan
Format: Conference Proceeding
Language:English
Subjects:
Circuit faults
Current measurement
Fault currents
Fault diagnosis
Power engineering and energy
Saturation magnetization
Senior members
Shape measurement
Surge protection
Transformers
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A new principle of transformer differential protection is presented in this paper. By comparing the voltage on the source side and the differential current in a specific time interval. An internal fault in a transformer can be discriminated. The differential protection scheme based on the new principle is able to clear the internal fault very quickly (within about 20 ms) and be affected by CT saturation.
DOI:10.1109/PESW.2000.847637