Wavelet-based Analysis of Impulse Grounding Resistance-Experimental Study of the "A"-type Grounding System

This article presents the results of experimental investigation concerned with the "A"-type grounding system's impulse characteristics, which are utilized for grounding of high-voltage transmission line towers. The investigation results point to the presence of high-frequency componen...

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Bibliographic Details
Published in:Electric power components and systems 2015-11, Vol.43 (19), p.2189-2195
Main Authors: Veledar, Meludin, Avdakovic, Samir, Bajramovic, Zijad, Savic, Milan, Stankovic, Koviljka, Carsimamovic, Adnan
Format: Article
Language:English
Subjects:
Circuits
coordination of insulation in power system
Discrete Wavelet Transform
Electric currents
Electric potential
Electrical grounding
Electricity distribution
electromagnetic compatibility
electromagnetic transients
Frequencies
Generators
high-voltage engineering
high-voltage equipment
Impulses
insulation techniques
Joining
measurement uncertainty
power system analysis
power system dynamics and stability
testing methods
Towers
Voltage
Wavelet transforms
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Summary:This article presents the results of experimental investigation concerned with the "A"-type grounding system's impulse characteristics, which are utilized for grounding of high-voltage transmission line towers. The investigation results point to the presence of high-frequency components in voltage and current signals that are not caused by tower footing response to the impulse current. Additionally, both surge generator coupling and measuring circuit remain their main source. High-frequency components of signals are extracted from voltage and current signals by means of the discrete wavelet transform. In addition to being external influence results, the extracted components have very low energy content as well as short duration. The discrete wavelet transform analysis application has validated the existence of external influences.
ISSN:1532-5008
1532-5016
DOI:10.1080/15325008.2015.1077358