- Volume 6 Issue 3
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Hydrodynamic Modeling for Discharge Analysis in a Dielectric Medium with the Finite Element Method under Lightning Impulse
- Lee, Ho-Young (School of Electrical Engineering and Computer Science, Kyungpook National University) ;
- Lee, Se-Hee (School of Electrical Engineering and Computer Science, Kyungpook National University)
- Received : 2010.08.24
- Accepted : 2010.12.08
- Published : 2011.05.02
The response of lightning impulse voltage was explored in dielectric liquids employing hydrodynamic modeling with three charge carriers using the finite element method. To understand the physical behavior of discharge phenomena in dielectric liquids, the response of step voltage has been extensively studied recently using numerical techniques. That of lightning impulse voltage, however, has rarely been investigated in technical literature. Therefore, in this paper, we tested impulse response with a tip-sphere electrode which is explained in IEC standard #60897 in detail. Electric field-dependent molecular ionization is a common term for the breakdown process, so two ionization factors were tested and compared for selecting a suitable coefficient with the lightning impulse voltage. To stabilize our numerical setup, the artificial diffusion technique was adopted, and finer mesh segmentation was generated along with the axial axis. We found that the velocity from the numerical result agrees with that from the experimental result on lightning impulse breakdown testing in the literature.
- F. M. O’Sullivan, “A Model for the Initiation and Propagation of Electrical Streamers in Transformer Oil and Transformer Oil Based Nanofluids” Ph.D. dissertation, Massachusetts Institute of Technology, Cambridge, MA, USA, 2007.
- F. O'Sullivan, J. G. Hwang, M. Zahn, O. Hjortstam, L. Pettersson, R. Liu and P Biller, "A Model for the Initiation and Propagation of Positive Streamers in Transformer Oil," in IEEE International Symposium on Electrical Insulation ISEI08, Vancouver, BC, Canada, June 2008.
- Markus Zahn, “Solid, Liquid, and Gaseous Electrical Insulation,” Encyclopedia of Applied Physics, VCH Publishers, American Institute of Physics, Vol. 18, pp. 431-466, 1997.
- V. Segal et. al., “AC(60Hz) and Impulse Breakdown Strength of a Colloidal Fluid Based on Transformer Oil and Magnetite Nanoparticles,” IEEE Int. Symp. On Elec. Insul., Arlington, Virginia, USA, June 7-10, 1998.
- G. Massala, O. Lesaint, “Positive Streamer Propagation in Large Oil Gaps: Electrical Properties of Streamers,” IEEE Trans. Diel. Elec. Insul., Vol. 5, No. 3, June 1998.
- A. Beroual, M. Zahn, et al., “Propagation and Structure of Streamers in Liquid Dielectrics,” IEEE Electr. Insul. Magn., Vol. 14, No. 2, March/April 1998.
- O. Lesaint and T. V. Top, “Streamer Initiation in Mineral Oil: Electrode Surface Effect under Impulse Voltage,” IEEE Trans. Diel. Elec. Insul., Vol. 9, No. 1, February 2002.
- J. H. Choi, B. H. Lee, “Electrical Properties Associated with Discharge Developments in Water Subjected to Impulse Voltages,” Journal of Electrical Engineering & Technolgy, Vol. 5, No. 1, pp. 156-162, 2010. https://doi.org/10.5370/JEET.2010.5.1.156
- B. H. Lee, D. S. Kim, J. H. Choi, “Underwater Discharge Phenomena in Inhomogeneous Electric Fields Caused by Impulse Voltages,” Journal of Electrical Engineering & Technolgy, Vol. 5, No. 2, pp. 329-336, 2010. https://doi.org/10.5370/JEET.2010.5.2.329
- IEC Standard # 60897, Methods for the Determination of the Lightning Impulse Breakdown Voltage of Insulating Liquids, 1987.
- J. C. Heinrich, P. S. Huyakorn, and O. C. Zienkiewicz, “An ‘upwind’ finite element scheme for twodimensional convective transport equation,” International Journal for Numerical Methods in Engineering, Vol. 11, pp. 131-143, 1977. https://doi.org/10.1002/nme.1620110113
- Numerical and Experimental Validation of Discharge Current With Generalized Energy Method and Integral Ohm's Law in Transformer Oil vol.50, pp.2, 2014, https://doi.org/10.1109/TMAG.2013.2279181
- Electrohydrodynamic Analysis of Dielectric Guide Flow Due to Surface Charge Density Effects in Breakdown Region vol.10, pp.2, 2015, https://doi.org/10.5370/JEET.2015.10.2.647
- Fully Coupled Finite Element Analysis for Cooling Effects of Dielectric Liquid Due to Ionic Dissociation Stressed by Electric Field vol.49, pp.5, 2013, https://doi.org/10.1109/TMAG.2013.2246551