An Alternative Simulation Technique for Fault Location Studies Based On Travelling Waves

Hashim Hizam,

Dept of Electrical & Electronics Engineering

Faculty of Engineering, Universiti Putra Malaysia,

43400 UPM, Serdang, Selangor, Malaysia

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Peter A. Crossley

Queen's University Belfast , University Road, Belfast, BT7 1NN,     Northern Ireland, UK

and Phillip F. Gale

Hathaway Corporation, Brewery Road, Hoddesdon, Hertfordshire, EN11 8HF, UK

Manuscript received November 26, 2004

Revised December 24, 2004

 

 


ABSTRACT

Any transient disturbance such as switching operations and faults will result in the high frequency current and voltage signals to propagate between the point of disturbance, the line terminals and other impedance discontinuities. These various reflections and refractions of signals generated are normally described using the Bewley lattice diagram. However, this diagram can be very difficult to follow in certain cases. PSCAD/EMTDC and ATP/EMTP are commonly used as simulation tools for transient studies. These programs can model power system networks and produce very realistic waveforms but users may have difficulty in identifying various pulses or signals in the waveforms.

This paper investigates another technique called “Time Trees” which is used to provide visual description of how various waves are generated in a network. The results show that the “Time Trees” technique is relatively accurate and has the potential for use in the fault location studies based on the high frequency signals.

 

 

Keywords: Fault location, travelling waves, transient.

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