Impact of Distributed Generation on Transient-Based Fault Location Techniques in Distribution Networks

Feizifar B., Usta Ö., HAGHIFAM M. R.

IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING, vol.10, no.3, pp.242-248, 2015 (SCI-Expanded) identifier identifier


This paper demonstrates the effect of conventional distributed generation (DG) on fault location techniques based on transient signal analysis. DG penetration in distribution networks deviates the route-specific frequencies generated by fault traveling waves propagating along the feeders and laterals. The amount of these deviations is proportional to the rated power of a certain DG unit. A validated fault location procedure is used to clarify this effect. Fault-generated voltage transient signals are analyzed using continuous wavelet transform (CWT). These signals are captured by a recording device generally placed at the main feeder supplying the distribution systems. The route-specific frequencies are acquired by the wavelet amplitude spectrum of transient signals. Using this technique, the relevance between the CWT-recognized specific frequencies and those attained by mathematical definition determines the fault position. A six-bus radial test distribution feeder is simulated within the EMTP-RV program, and analysis of relevant transient signals is carried out using MATLAB programming language. (c) 2015 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.