An analytic approach for optimal coordination of overcurrent relays

This study presents a new analytic approach to optimal coordination of directional overcurrent relays. This approach is based on the selection of optimum pickup current and time dial setting, in order to obtain minimum operating time for the relays, while satisfying various coordination and boundary...

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Bibliographic Details
Published in:IET generation, transmission & distribution Vol. 7; no. 7; pp. 674 - 680
Main Authors: Mahari, Arash, Seyedi, Heresh
Format: Journal Article
Language:English
Published: Stevenage The Institution of Engineering and Technology 01.07.2013
Institution of Engineering and Technology
The Institution of Engineering & Technology
Subjects:
analytic approach
Applied sciences
Boundaries
boundary constraints
Connection and protection apparatus
Dials
directional overcurrent relay optimal coordination
Electrical engineering. Electrical power engineering
Evolutionary
evolutionary approaches
evolutionary computation
Exact sciences and technology
iterative methods
iterative numerical algorithm
Mathematical analysis
Mathematical models
numerical algorithm
Numerical analysis
Optimization
optimum pickup current selection
Overcurrent
overcurrent protection
overcurrent relay protection
relay protection
time dial setting selection
iterative numerical algorithm
iterative methods
evolutionary approaches
optimum pickup current selection
numerical algorithm
directional overcurrent relay optimal coordination
analytic approach
evolutionary computation
overcurrent relay protection
time dial setting selection
relay protection
overcurrent protection
boundary constraints
Operating time
Minimum time
Relay
Evolutionary computation
Analytical method
Iterative method
Global optimum
Numerical method
Overcurrent
Comparative study
Numerical algorithm
ISSN:1751-8687, 1751-8695
Online Access:Get full text
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Description
Summary:This study presents a new analytic approach to optimal coordination of directional overcurrent relays. This approach is based on the selection of optimum pickup current and time dial setting, in order to obtain minimum operating time for the relays, while satisfying various coordination and boundary constraints. Based on the new optimal relay setting procedure, an iterative numerical solution is proposed. The proposed numerical algorithm converges to the global optimum values, which are independent of initial values and the order of relay setting. The proposed method is applied to three different test systems. The new method is compared with some previously proposed analytic and evolutionary approaches. The results demonstrate the advantages of the proposed method over the previous works.
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ISSN:1751-8687
1751-8695
DOI:10.1049/iet-gtd.2012.0721