By Topic

Comparative analysis on current percentage differential protections using a novel reliability evaluation criterion

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Xiangning Lin ; Dept. of Electr. Eng., Huazhong Univ. of Sci. & Technol., Wuhan, China ; Qing Tian ; Zhao, M.

A novel reliability evaluation criterion, designated as consistent security, is proposed in this paper to compare the comprehensive performance between the current differential protections in various bias current designs. It is initially based on the investigations of the comparative analysis between the complex percentage differential criterion, which is a kind of compensated bias current design, and normal percentage differential criterion. A variety of fault scenarios is included in these comparisons (e.g., current-transformer (CT) saturation induced by a severe external fault resulting in false differential current, various internal fault scenarios leading to possible ratio, and phase differences of outgoing current to the incoming current). Based on investigations on the CT saturation due to external faults, a novel baseline, "consistent security", is thus put forward to evaluate the comprehensive performances of the differential protections implemented with different bias current designs. On the basis of consistent security, it can be proved that the complex differential criterion is better than normal differential criterion in most operation conditions.

Published in:

Power Delivery, IEEE Transactions on  (Volume:21 ,  Issue: 1 )