Investigation of The DGs Effect on The Coordination Between Protective Elements  in Distribution Network

abdallah Reda; M. Farahat; Amal F. Abdelgawad; A.T.M  Taha

doi:10.31686/ijier.vol7.iss4.1402

Authors

abdallah Reda Zagazig University, Egypt https://orcid.org/0000-0002-2623-2171
M. Farahat Zagazig University, Egypt
Amal F. Abdelgawad Zagazig University, Egypt
A.T.M Taha Ain Shams University, Egypt

DOI:

https://doi.org/10.31686/ijier.vol7.iss4.1402

Keywords:

Coordination, Distributed Generators (DG), Relays, ETAP

Abstract

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.

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Author Biographies

abdallah Reda, Zagazig University, Egypt

Electrical power and machines engineering
M. Farahat, Zagazig University, Egypt

Department of Electrical Power & Machines Engineering, Faculty of Engineering
Amal F. Abdelgawad , Zagazig University, Egypt

Department of Electrical Power & Machines Engineering, Faculty of Engineering
A.T.M Taha, Ain Shams University, Egypt

Department of Electrical Power & Machines Engineering, Faculty of Engineering

References

[1] Barker, P. P. and R. W. De Mello, “Determining the impact of distributed generation
on power systems”, Radial distribution systems, Power Engineering Society Summer
Meeting, 2000, IEEE.
[2] 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.
[3] 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.
p.623–8.
[4] Boutsika TN, Papathanassiou SA,“Short-circuit calculations in networks with distributed
generation”, Electric Power Syst Res 2008; 78(7):1181–91.
[5] Conti S. “Analysis of distribution network protection issues in presence of dispersed
generation”, Electric Power Syst Res 2009; 79 (1):49–56.
[6] 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.
[7] 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.
[8] 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.