DocumentCode :
1490533
Title :
A New Technique to Detect Faults in De-Energized Distribution Feeders—Part I: Scheme and Asymmetrical Fault Detection
Author :
Long, Xun ; Xu, Wilsun ; Li, Yun Wei
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Alberta, Edmonton, AB, Canada
Volume :
26
Issue :
3
fYear :
2011
fDate :
7/1/2011 12:00:00 AM
Firstpage :
1893
Lastpage :
1901
Abstract :
Re-energizing an overhead distribution feeder safely is a major consideration for a utility´s safe work practice. One way to improve the safety is to determine whether the feeder still experiences short circuits before it is energized. In this paper, a novel fault detection technique is proposed to detect if a de-energized distribution system still experiences short-circuit faults. The proposed method involves injecting a thyristor-generated-controllable signal into the de-energized feeder. The feeder voltage and current responses are analyzed to determine if a fault still exists. A thyristor gating control strategy and fault detection algorithm are also developed in this paper to detect all possible types of faults that can occur in a system. The effectiveness of the proposed method has been verified through theoretical analysis, computer simulations, and lab tests.
Keywords :
electrical safety; fault location; power distribution control; power distribution faults; power distribution lines; power overhead lines; short-circuit currents; thyristor applications; asymmetrical fault detection; deenergized distribution feeder; feeder current response; feeder voltage response; overhead distribution feeder safe reenergisation; short-circuit fault; thyristor gating control strategy; thyristor generated controllable signal; Circuit faults; Current measurement; Fault detection; Impedance; Phase transformers; Thyristors; Voltage measurement; De-energized distribution line; fault classification; fault detection; power electronics; safe recloser;
fLanguage :
English
Journal_Title :
Power Delivery, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8977
Type :
jour
DOI :
10.1109/TPWRD.2011.2118237
Filename :
5744143
Link To Document :
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