NDLI: Dual-setting characteristic for directional overcurrent relays considering multiple fault locations

Content Provider	IET Digital Library
Author	Saleh, Khaled Ahmed Zeineldin, Hatem Hussein Hinai, Amer Al Sadeghzadeh, Ramazan Ali
Abstract	Optimal relay settings are determined where coordination constraints are modelled considering only either one fault location (near end or midpoint) or two fault locations (near and far end) on a feeder. This study, first, investigates whether considering one or two fault locations is sufficient to guarantee proper coordination for faults at all other locations on a feeder. The results show that violations, in the coordination constraints, can occur at various points along the feeder if the relays are coordinated considering one or two fault locations. In addition, considering multiple fault locations while determining the optimal relay setting can avoid such problem but on the expense of the overall relay tripping time. Thus, a dual-setting characteristic for directional overcurrent relays (DOCRs) is proposed instead of the conventional inverse time-current characteristic. The study is conducted on the power transmission system of IEEE 24-bus and the power distribution system of IEEE 14-bus. The proposed characteristic achieves notable reduction in total DOCRs operating time over the conventional characteristic for both test systems while achieving proper coordination across a broader range of possible fault locations.
Starting Page	1332
Ending Page	1340
Page Count	9
ISSN	17518687
Volume Number	9
e-ISSN	17518695
Issue Number	Issue 12, Sep (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/9/12
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2014.0683
Journal	IET Generation, Transmission & Distribution
Publisher Date	2015-04-09
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Coordination Constraint Directional Overcurrent Relays Distribution Network DOCR Dual-setting Characteristic Fault Location IEEE 14-bus IEEE 24-bus IEEE Standards Inverse Time-current Characteristic Multiple Fault Locations Optimal Relay Settings Overcurrent Protection Power Distribution Protection Power Distribution System Power System Protection Power Transmission Protection Power Transmission System Relay Protection Test System
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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