By Topic

Sensitivity Analysis to Operation Margin of Zone 3 Impedance Relays With Bus Power and Shunt Susceptance

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

4 Author(s)
Shenghu Li ; Hiroshima Univ., Hiroshima ; Yorino, N. ; Ming Ding ; Zoka, Y.

Zone 3 impedance relays are sensitive to power-flow distribution due to their overreaching property, and may undesirably operate in stressed system conditions with reactive power shortages or neighboring faults. In this paper, the distance of the apparent impedance to the protection boundary on the R-X plane is defined by the operation margin, which is expressed as the function of bus voltages. The sensitivities of the operation margin to bus voltages, bus powers, and shunt susceptances quantify the influence of various disturbances on the relay performance. The numerical results show: (1) the operation margin is quantified by the sensitivities with satisfying accuracy and less computation effort compared with power-flow schemes; (2) the variation of bus powers and shunt susceptances at different locations may improve or decrease the operation margin; and (3) the variation of active and reactive powers at the same bus may yield opposite effects on the operation margin.

Published in:

Power Delivery, IEEE Transactions on  (Volume:23 ,  Issue: 1 )