Share This Article:

Comparative Study on Substation Shielding Due to Direct Lightning Strokes

Abstract Full-Text HTML Download Download as PDF (Size:306KB) PP. 600-611
DOI: 10.4236/jpee.2014.24081    4,729 Downloads   5,616 Views   Citations

ABSTRACT

Malaysia is one of the many countries that experience high lightning related activities. In fact, according to Malaysian Meteorological Department the Ground Flash Density (GFD) in Malaysia, it is rated at the fifth place in the ten most lightning cities of the world, with a high keraunic level, which is 240 thunderstorm days per year, and in other words, a Ground Flash Density (GFD) of 48.3 flashes per square kilometer per year. In the power systems, high keraunic level would contribute to high possibility of power interruptions such as disruption, degradation, damage and downtime. These outages would ultimately lead to revenue losses and reduction of network reliability. These lightning related interruptions may be in terms of direct lightning strikes to the lines or to the equipments in the substation. By the use of Mat Lab GUI (Graphic Users Interface), this study presents a simple computer program which uses the electro-geometric model (EGM) for the designing of substation shielding systems. The EGM uses the concept where the protection zone of a lightning system lies within the radius where the upward channel initiates and propagates through the air terminal to meet the downward leader. This interception point is called “the point of discrimination” and is where the downward leader decides its final jump. The distance at which the last jump occurs is known as the striking distance. With the use of the striking distance and the mathematical equations developed by Young, Brown-Whitehead, IEEE-1992 (IEEE T&D Committee Equations) and IEEE-1995 (IEEE Substations Committee Equations). This project aimed to investigate, understand and analyse the substation protection by means of masts and shield wires. The analysis is extended to account for lightning protection provided by single mast to two masts as well as from single shield wire to double shielding wires. The outcomes of these four equations will be compared.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Bakar, A. , Tan, C. , Abidin, A. , Khai, P. , Mokhlis, H. and Illias, H. (2014) Comparative Study on Substation Shielding Due to Direct Lightning Strokes. Journal of Power and Energy Engineering, 2, 600-611. doi: 10.4236/jpee.2014.24081.

References

[1] Eriksson, A.J. (1987) An Improved Electrogeometric Model for Transmission Line Shielding Analysis. IEEE Transactions on Power Delivery, 2, 871-886. http://dx.doi.org/10.1109/TPWRD.1987.4308192
[2] Mousa, A.M. and Srivastava, K.D. (1989) The Implications of the Electrogeometric Model Regarding Effect of Height of Structure on the Median Amplitude of Collected Lightning Strokes. IEEE Transactions on Power Delivery, 4, 1450-1460.
[3] Hileman, A.R. (1999) Insulation Coordination for Power Systems. CRC Press, Taylor & Francis Group.
[4] Chowdhuri, P. and Kotapalli A.K. (1989) Significant Parameters in Estimating the Striking Distance of Lightning Strokes to Overhead Lines. IEEE Transactions on Power Delivery, 4, 1970-1981. http://dx.doi.org/10.1109/61.32697
[5] Cooray, V., Rakov, V. and Theethayi, N. (2007) The Lightning Striking Distance—Revisited. Journal of Electrostatics, 65, 296-306. http://dx.doi.org/10.1016/j.elstat.2006.09.008

  
comments powered by Disqus

Copyright © 2018 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.