Main Article Content
Addition of Distributed Generators (DGs) to the electric network have more advantages to the network. It improves the voltage profile and the power flow in the network. In the last decade, DGs is used in power system, especially the distribution system. Coordination study for protective devices must be performed on the distribution network with DGs to reach selectivity with minimum clearance time of fault. Due to DG insertion to the electric system, the short circuit level is changed and coordination between protective elements should be done. This paper presents a technique to avoid the miscoordination problem between protective devices due to the impact of DG units insertion without any additional costs. The proposed technique depend on activating and updating the setting of network relays to achieve correct coordination. Also, it doesn't need any additional costs or any additional equipement to be installed in the electric network. This paper make studies on a real radial system of power transformer with its feeders of a 66kV utility substation before and after adding DGs. ETAP software is used to simulate the network under study.
This work is licensed under a Creative Commons Attribution 4.0 International License.
Submission of an article implies that the work described has not been published previously (except in the form of an abstract or as part of a published lecture or academic thesis), that it is not under consideration for publication elsewhere, that its publication is approved by all authors and tacitly or explicitly by the responsible authorities where the work was carried out, and that, if accepted, will not be published elsewhere in the same form, in English or in any other language, without the written consent of the Publisher. The Editors reserve the right to edit or otherwise alter all contributions, but authors will receive proofs for approval before publication.
Copyrights for articles published in IJIER journals are retained by the authors, with first publication rights granted to the journal. The journal/publisher is not responsible for subsequent uses of the work. It is the author's responsibility to bring an infringement action if so desired by the author.
on power systems”, Radial distribution systems, Power Engineering Society Summer
Meeting, 2000, IEEE.
 Kauhaniemi K, Kumpulainen L, “Impact of distributed generation on the protection of
distribution networks”, Eighth IEE international conference on developments in power
system protection, vol. 1. 2004. pp. 315–8.
 de Britto TM, Morais DR, Marin MA, Rolim JG, Zurn HH, Buendgens RF. “Distributed
generation impacts on the coordination of protection systems in distribution networks”,
IEEE/PES transmission and distribution conference and exposition: Latin America; 2004.
 Boutsika TN, Papathanassiou SA,“Short-circuit calculations in networks with distributed
generation”, Electric Power Syst Res 2008; 78(7):1181–91.
 Conti S. “Analysis of distribution network protection issues in presence of dispersed
generation”, Electric Power Syst Res 2009; 79 (1):49–56.
 Ghosh S, Ghoshal SP, Ghosh S. “Optimal sizing and placement of distributed generation
in a network system”, Int J Electric Power Energy Syst 2010; 32(8):849–56.
 A. Y. Abdelaziz, H. E. A. Talaat, A. I. Nosseir, and A. A. Hajjar, “An adaptive protection
scheme for optimal coordination of overcurrent relays”, Electric Power Systems
Research,vol. 61, pp. 1-9, 2002.
 T. Tran-Quoc, C. Andrieu, and N. Hadjsaid, “Technical impacts of small distributed
generation units on LV networks”, in Power Engineering Society General Meeting, 2003,
IEEE, 2003, p. 2464 Vol. 4.