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Evaluation of breakdown characteristics of N2 gas for non-standard lightning impulse waveforms - method for converting non-standard lightning impulse waveforms into standard lightning impulse waveforms -.
- Source :
- IEEE Transactions on Dielectrics & Electrical Insulation; Apr2013, Vol. 20 Issue 2, p505-514, 10p
- Publication Year :
- 2013
-
Abstract
- SF<SUB>6</SUB> gas, an insulation medium used for gas insulated switchgear (GIS), is known for its high global warming potential, hence the search for an effective alternative from an environmental perspective. As a potential alternative, the authors are focusing on N<SUB>2</SUB> gas. To use this N<SUB>2</SUB> gas for actual GIS, the insulation characteristics for actual overvoltage waveforms generated in the field (non-standard lightning impulse waveforms) must be obtained. For this purpose, the preceding study experimentally obtained and evaluated the insulation characteristics for various non-standard lightning impulse waveforms covering the surge waveforms generated in the actual field. In the present paper, the experimental results accumulated to date were comprehensively handled to conduct a study on the evaluation method of the insulation characteristics of the N<SUB>2</SUB> gas for nonstandard lightning impulse waveforms. Consequently, similarly to the previous study using SF<SUB>6</SUB> gas, the insulation characteristics could be expressed by one characteristic line using the duration as a parameter. In addition, based on the characteristic line, a method of evaluating insulation specifications for generated waveforms was established and applied as an example to actual surge waveforms in a substation. Furthermore, it emerged that the insulation specifications could potentially be reduced by about 10% for actual surge waveforms used in the present study. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 10709878
- Volume :
- 20
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Dielectrics & Electrical Insulation
- Publication Type :
- Academic Journal
- Accession number :
- 87462652
- Full Text :
- https://doi.org/10.1109/TDEI.2013.6508753