Influence of fault impedance on voltage quality in radial distribution systems with distributed synchronous generator: a sensitivity analysis

A. J. T. S. Filho, A. O. Camargo and E. G. Domingues




The power quality delivered to final consumers has deserved special attention on the part of the scientific community due to the increasing deterioration of voltage and current waveforms as a result of use of non-linear loads. Deployment of Distributed Generation Power is expected to have a range of effects (positive or negative) on the distribution grid. This paper presents a sensitivity analysis of voltage quality of a radial distribution system located in Guarulhos, Brazil, in a presence of a distributed synchronous generator in one of its bars. The sensitive analysis is done by varying the resistive fault impedance by considering the occurrence of different types of faults due to atmospheric discharging. The system is modelled and simulated in time domain through ATP software. It was verified that the impacts caused by the symmetrical and asymmetric faults on voltage levels are attenuated as the resistive fault impedance increases.

Published in: Renewable Energy & Power Quality Journal (RE&PQJ, Nº. 16)
Pages: 152-157 Date of Publication: 2018/04/20
ISSN: 2172-038X Date of Current Version:2018/03/23
REF: 246-18 Issue Date: April 2018
DOI:10.24084/repqj16.246 Publisher: EA4EPQ

Authors and affiliations

A. J. T. S. Filho(1), A. O. Camargo(2) and E. G. Domingues(1,2,3)
1. Faculty of Control and Automation Engineering. Federal Institute of Goiás, IFG. Campus Goiânia – Goiás, Brazil
2. Faculty of Electrical Engineering. Federal Institute of Goiás, IFG. Campus Goiânia – Goiás, Brazil
3. Nucleus of Experimental and Technological Studies and Research (NExT). Federal Institute of Goiás, IFG. Campus Goiânia – Goiás, Brazil

Key words

ATP software, fault impedance, sensitivity analysis, voltage quality.


[1] IEEE Std 846 “Recommended for Emergency and Standby Power Systems for Industrial and Commercial Applications”, IEEE Orange Book, 1995.
[2] A.C.L Ramos, A.J Batista, R.C Leborgne, P. Emiliano, “Distributed generation impact on voltage sags” Power Electronics Conference, 2009. COBEP '09. Brazilian, vol., no., pp.446-450, Sept. 27 2009-Oct. 1 2009.
[3] Cunha, L. V., “Performance of transmission lines against atmospheric discharges: influence of the corona effect on the rupture mid-span ", Master's Dissertation, Federal University of Minas Gerais, Belo Horizonte-MG, 2010.
[4] Kim, S. D., Morcos, M. M., Gomez, J. C., “Voltage-Sag Magnitude and Phase Jump due to Short Circuits in Distribution Systems with Variable Fault Resistance”, Electric Power Components and Systems, 33:5, 493-512, Oct 2005.
[5] Oliveira, D. A., “High Impedance Faults: Detection and location of conductor rupture in primary circuit of overhead distribution networks based on voltage unbalance ". Master’s Dissertation. Federal University of Minas Gerais, Belo Horizonte-MG, 2007.
[6] Farade, R., Kotiyal, B., Balsing, A. H., “Three-phase-to-ground fault and its impact on voltage magnitude” International Journal of Innovations in Engineering Research and Technology [IJIERT] (ISSN: 2394-3696), Volume 2, Issue 3, Mar 2015.
[7] Cabral, R. J., “ Numerical Analysis of Short Circuit using Symmetrical Components and Phase Components to Obtain Indices of Voltage Sags” Master’s Dissertation. Federal University of Rio Grande do Sul, Porto Alegre-RS, 2010.
[8] Lora, E. E. S.; Haddad, J., “Distributed Generation Technological, Environmental and Institutional Aspect”, Rio de Janeiro: Interscience, 2006.
[9] Peres, L. M., “Studies of the Dynamic Performance of Synchronous Generators of Independent Producers in Distributed Generation Systems via ATPDraw ", Master's Dissertation - Faculty of Electrical Engineering, Federal University of Uberlândia, Uberlândia-MG, 2013.
[10] NEXANS FICAP (2013). Aluminum. Available at: <> Accessed on: 01/23/2017.