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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/6970
Title: A new nonlinear directional overcurrent relay coordination technique, and banes and boons of near-end faults based approach
Authors: Birla D.
Maheshwari R.P.
Gupta H.O.
Published in: IEEE Transactions on Power Delivery
Abstract: Considerations of weight factors and far-end faults in the directional overcurrent relay coordination problem formulation do not affect the optimal solution. This paper investigates this viewpoint and verifies that indeed by such an approach the optimality is not lost. But, this study reveals that in doing so, the coordination quality is sacrificed to some extent. It is also observed that if all remaining valid constraints (after relaxing few constraints based on the back-up coordination philosophy and strength of fault level generated) are considered and if the objective function is changed to running sum of all violating constraints, all valid considered constraints are satisfied. This study is done by simultaneously optimizing all settings in nonlinear environment by Sequential Quadratic Programming method using Matlab Toolbox. The results of the analysis on a sample 6-bus and IEEE 30-bus systems are presented in this paper. © 2006 IEEE.
Citation: IEEE Transactions on Power Delivery (2006), 21(3): 1176-1182
URI: https://doi.org/10.1109/TPWRD.2005.861325
http://repository.iitr.ac.in/handle/123456789/6970
Issue Date: 2006
Keywords: Backup/Primary (B/P)
Coordination time interval (CTI)
Directional overcurrent relays (DOCRs)
Objective function
Pick-up current setting (Ip)
Time dial setting (TDS)
ISSN: 8858977
Author Scopus IDs: 14028029600
8941720600
24530497600
Author Affiliations: Birla, D., Department of Electrical Engineering, IIT Roorkee, Roorkee 247667, India
Maheshwari, R.P., Department of Electrical Engineering, IIT Roorkee, Roorkee 247667, India
Gupta, H.O., Department of Electrical Engineering, IIT Roorkee, Roorkee 247667, India
Corresponding Author: Birla, D.; Department of Electrical Engineering, IIT Roorkee, Roorkee 247667, India; email: dbrladee@iitr.ernet.in
Appears in Collections:Journal Publications [EE]

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