Open AccessOptimal coordination of overcurrent relays in distribution systems with distributed generators based on differential evolution algorithm
Author(s) -
Yang Hui,
Wen Fushuan,
Ledwich Gerard
Publication year - 2013
Publication title -
international transactions on electrical energy systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 42
ISSN - 2050-7038
DOI - 10.1002/etep.635
Subject(s) - overcurrent , computer science , differential (mechanical device) , distributed generation , algorithm , control theory (sociology) , current (fluid) , engineering , electrical engineering , renewable energy , artificial intelligence , aerospace engineering , control (management)
SUMMARY 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 feasibility and efficiency of the developed method. Copyright © 2011 John Wiley & Sons, Ltd.