Optimal coordination of overcurrent relays in distribution systems with distributed generators based on differential evolution algorithm
Yang, Hui, Wen, Fushuan, & Ledwich, Gerard (2011) Optimal coordination of overcurrent relays in distribution systems with distributed generators based on differential evolution algorithm. European Transactions on Electrical Power.
Distributed generators (DGs) are defined as generators that are connected to a distribution network. The direction of the power flow and short-circuit current in a network could be changed compared with one without DGs. The conventional protective relay scheme does not meet the requirement in this emerging situation. As the number and capacity of DGs in the distribution network increase, the problem of coordinating protective relays becomes more challenging. Given this background, the protective relay coordination problem in distribution systems is investigated, with directional overcurrent relays taken as an example, and formulated as a mixed integer nonlinear programming problem. A mathematical model describing this problem is first developed, and the well-developed differential evolution algorithm is then used to solve it. Finally, a sample system is used to demonstrate the feasiblity and efficiency of the developed method.
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|Item Type:||Journal Article|
|Keywords:||Distributed generation, Distributed system, Coordination of protective relays, Directional relay, Differential evolution algorithm|
|ISSN:||1546-3109 (online) 1430-144X (print)|
|Subjects:||Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600)|
|Divisions:||Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Copyright Owner:||Copyright 2011 John Wiley & Sons Ltd|
|Deposited On:||02 Apr 2012 03:16|
|Last Modified:||02 Apr 2012 03:16|
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