NDLI: Optimal Protection Coordination for Meshed Distribution Systems With DG Using Dual Setting Directional Over-Current Relays

Content Provider	IEEE Xplore Digital Library
Author	Zeineldin, H.H. Sharaf, H.M. Ibrahim, D.K. Abou El-Zahab, E.E.-D.
Copyright Year	2010
Abstract	In the presence of distributed generation (DG), it is important to assure a fast and reliable protection system for the distribution network to avoid unintentional DG disconnection during fault conditions. In this paper, dual setting directional over-current relays are proposed for protecting meshed distribution systems with DG. Dual setting relays are equipped with two inverse time-current characteristics whose settings will depend on the fault direction. The protection coordination problem for the dual setting directional relay is formulated as a nonlinear programming problem where the objective is to minimize the overall time of operation of relays during primary and backup operation. The proposed protection coordination scheme using dual setting relays is compared against the conventional approach, which relies on the conventional one setting directional relay. The proposed scheme is applied to the power distribution network of the IEEE 30-bus system equipped with synchronous and inverter-based DG. The results show that the proposed protection coordination scheme with dual setting relay can significantly reduce the overall relay operating time, making it an attractive option for distribution systems with DG.
Starting Page	115
Ending Page	123
Page Count	9
File Size	1318187
File Format	PDF
ISSN	19493053
Volume Number	6
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relays Fault currents Circuit faults Fault location Fuses Power systems Optimization tripping characteristics Directional overcurrent relays distributed generation (DG) optimization protection coordination
Content Type	Text
Resource Type	Article
Subject	Computer Science

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