# Discharge in long air gaps : modelling and applications / A. Beroual and I. Fofana.

Material type: TextSeries: IOP (Series). Release 2. | IOP expanding physicsPublisher: Bristol [England] (Temple Circus, Temple Way, Bristol BS1 6HG, UK) : IOP Publishing, [2016]Description: 1 online resource (various pagings) : illustrations (some color)Content type: text Media type: electronic Carrier type: online resourceISBN: 9780750312363; 9780750312387Subject(s): Lightning -- Computer simulation | Electric discharges -- Computer simulation | Electricity, electromagnetism & magnetism | SCIENCE / Physics / ElectricityAdditional physical formats: Print version:: No titleDDC classification: 551.56/32 LOC classification: QC966 | .B474 2016ebOnline resources: Click here to access online Also available in print.Item type | Current library | Call number | Status | Date due | Barcode |
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Ebooks | Indian Institute of Technology Delhi - Central Library | Available |

"Version: 20160601"--Title page verso.

Includes bibliographical references.

Preface -- 1. Introduction -- 1.1. Research into and interest in the long air gap discharge -- 1.2. Scope and objectives -- 1.3. Intended audience

2. The background of air gap discharge theory -- 2.1. Introduction -- 2.2. Ionization phenomena -- 2.3. Cross section and mean free path--elastic collisions -- 2.4. Mobility, diffusion, and recombination -- 2.5. Discharge in small air gaps : Townsend's discharge theory -- 2.6. Self-sustaining discharge -- 2.7. Limits of Townsend's theory -- 2.8. Streamer-leader theory

3. The positive discharge in long air gaps -- 3.1. Introduction -- 3.2. Air gap breakdown process under an impulse voltage

4. The negative discharge in long air gaps -- 4.1. Introduction -- 4.2. First negative corona and stem -- 4.3. The cathodic stem and upward discharges -- 4.4. The negative leader -- 4.5. The space stem or pilot system -- 4.6. Final jump phase

5. Lightning discharge -- 5.1. Introduction -- 5.2. The global electric circuit -- 5.3. The most common types of lightning discharge -- 5.4. A description of a cloud-ground lightning discharge processes -- 5.5. Lightning electrical parameters -- 5.6. Comparison of laboratory sparks and cloud-ground lightning discharges

6. A review of existing mathematical models developed for long air gap discharges -- 6.1. Introduction -- 6.2. Positive discharge models -- 6.3. Negative discharge models -- 6.4. Fractal models of long discharges

7. Modelling the positive discharge in long air gaps -- 7.1. Introduction -- 7.2. A general description of the dynamic procedure -- 7.3. The applied voltage wave shape -- 7.4. The characterization of the discharge propagation -- 7.5. Distributed-circuit-based modelling -- 7.6. The distributed-circuit elements -- 7.7. General flowchart of the model -- 7.8. Extension to a very long air gap : positive lightning

8. Modelling the negative discharge in long air gaps -- 8.1. Introduction -- 8.2. The development of a negative discharge -- 8.3. Theoretical background -- 8.4. Distributed-circuit-based modelling -- 8.5. General description of computation steps -- 8.6. Extension to a very long air gap : negative lightning

9. Applications of the model developed for positive discharge in long air gaps -- 9.1. Introduction -- 9.2. Prediction of the characteristics of long air gap discharges : simulations of some laboratory experiments -- 9.3. Prediction of the switching impulse withstand voltages of long air gaps -- 9.4. Flashover voltage of long air gaps in the presence of a floating insulating barrier

10. Applications of the model developed for negative discharge in long air gaps -- 10.1. Introduction -- 10.2. Simulation of laboratory experiments -- 10.3. Prediction of the 50% negative breakdown voltage

11. Application of the model to positive lightning discharge -- 11.1. Introduction -- 11.2. Prediction of positive lightning discharge parameters -- 11.3. Influence of soil conductivity and cloud-ground distance on the positive lightning impulse current -- 11.4. Electric field changes of the leader and return stroke -- 11.5. Magnetic field associated with the leader

12. Application of the model to the process of lightning-ground connection and quantification of the striking distance -- 12.1. Introduction -- 12.2. Modelling the lightning connection process to a ground structure -- 12.3. A quantitative study of lightning striking distance factors

13. Application of the model to evaluate the induced effects on overhead lines due to a nearby positive lightning downward leader -- 13.1. Introduction -- 13.2. Induced effects on an overhead line due to nearby positive lightning downward leader

14. Negative lightning model--applications -- 14.1. Introduction -- 14.2. The prediction of negative lightning discharge parameters -- 14.3. Electric and magnetic fields associated with the leader.

Discharge in Long Air Gaps: Modelling and applications presents self-consistent predictive dynamic models of positive and negative discharges in long air gaps. Equivalent models are also derived to predict lightning parameters based on the similarities between long air gap discharges and lightning flashes. Macroscopic air gap discharge parameters are calculated to solve electrical, empirical and physical equations, and comparisons between computed and experimental results for various test configurations are presented and discussed. This book is intended to provide a fresh perspective by contributing an innovative approach to this research domain, and universities with programs in high-voltage engineering will find this volume to be a working example of how to introduce the basics of electric discharge phenomena.

Graduate and post-graduate students, engineers working on power transmission and distribution, engineers working on protection of systems/structures against over-voltages and lightning strikes.

Also available in print.

Mode of access: World Wide Web.

System requirements: Adobe Acrobat Reader.

Abderrahmane Beroual is a distinguished full Professor at University of Lyon in the Ecole Centrale de Lyon, France. His research has made a substantial contribution to long air gaps discharge and lightning, outdoor insulation, modelling of discharges and composite materials, pre-breakdown and breakdown phenomena in dielectric fluids and solid/fluid interfaces. He was elected IEEE fellow in 2011 for his contribution to processes of pre-breakdown and breakdown in dielectric liquids. Issouf Fofana is chair professor at the Université du Québec à Chicoutimi (UQAC) and Director of the Modeling and Diagnostic of Power Network Equipment (MODELE) laboratory. He is actively involved with teaching and research in the area of high-voltage engineering with emphases on the insulation diagnostic/modelling relevant to power equipment.

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