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New Insights Into Lightning Return-Stroke Models With Specified Longitudinal Current Distribution
- Source :
- IEEE Transactions on Electromagnetic Compatibility. 51:471-478
- Publication Year :
- 2009
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2009.
-
Abstract
- We show that any lightning return-stroke model with specified longitudinal current distribution can be expressed, using the appropriate continuity equation, in terms of two current components, propagation current and corona current. For lumped-current-source (LCS)-type (transmission-line-type) models, the actual corona current is unipolar and directed radially out of the channel core, while for distributed-current-source (DCS)-type (traveling-current-source-type) models, it is also unipolar but directed into the channel core. The conversion between LCS and DCS return-stroke models alters the actual corona current (if any) of the model. A new formulation for LCS lightning return-stroke models is proposed using corona current and propagation current concepts. This formulation expresses the longitudinal current at height z' as the channel-base current minus the overall longitudinal current change from ground surface to z'. Dynamics of lightning-channel corona sheath surrounding the thin channel core are examined based on LCS and DCS models.
- Subjects :
- Engineering
business.industry
Propagation delay
Mechanics
Current source
Condensed Matter Physics
Lightning
Atomic and Molecular Physics, and Optics
Corona (optical phenomenon)
Continuity equation
Power electronics
Electronic engineering
Electrical and Electronic Engineering
Current (fluid)
business
Communication channel
Subjects
Details
- ISSN :
- 00189375
- Volume :
- 51
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Electromagnetic Compatibility
- Accession number :
- edsair.doi...........24171728aa346c9b5741ea74e646ce7e
- Full Text :
- https://doi.org/10.1109/temc.2009.2017200