Christophorou Gaseous Dielectrics II

Proceedings of the Second International Symposium on Gaseous Dielectrics, Knoxville, Tennessee, U.S.A., March 9-13, 1980
1. Auflage 2013
ISBN: 978-1-4831-5585-2
Verlag: Elsevier Science & Techn.
Format: PDF
Kopierschutz: 1 - PDF Watermark

E-Book, Englisch, 508 Seiten, Web PDF

Gaseous Dielectrics II focuses on the discussion of the progress and issues related with gaseous dielectrics, their efficient use by the electric power industry, and how they affect the environment. This book features contributors who have pursued extensive research on gaseous dielectrics. The discussion starts with a presentation of the fundamental physics covering the subject. In this regard, numerical analyses are presented to show the nature of gaseous dielectrics. This book then proceeds by presenting the fundamental mechanisms involving corona discharge and breakdown in air as well as discharge processes in SF6. Supporting the discussion are numerical calculations that show how the processes progress. A discussion of 'new gaseous dielectrics is also presented. In this consideration, the breakdown behavior of new gases and gas mixtures as well as their strength are elaborated. This topic is followed by the evaluation of the effect of surface defects on the breakdown of gases and gas mixtures. Another part of the book discusses the effects of conducting particles to gases and gas mixtures in gas-insulated systems. A discussion of the decomposition of gases and gas mixtures is presented, including high-voltage testing of gases and gas mixtures. The bioenvironmental effects of dielectric gases are also discussed. This selection is a valuable source of information for readers who are interested in studying the industrial utilization of gaseous dielectrics.

Autoren/Hrsg.

Christophorou, Loucas G.

Inhaltsverzeichnis

1;Front Cover;1
2;Gaseous Dielectrics II;4
3;Copyright Page;5
4;Table of Contents;8
5;PREFACE;6
6;GASEOUS DIELECTRICS II;12
7;CHAPTER 1. BASIC PHYSICS OF GASEOUS DIELECTRICS;14
7.1;IONIC AND ELECTRONIC PROCESSES IN SULFUR HEXAF LUORIDE;14
7.2;CALCULATION OF ELECTRIC FIELD-INDUCED DETACHMENT RATE OF ELECTRONS FROM MONONEGATIVE IONS; RELEVANCE TO GASEOUS DIELECTRICS;25
7.3;ELECTRON SWARM DATA RELEVANT TO HIGH-VOLTAGE INSULATION;38
7.4;A CRITIQUE OF METHODS FOR CALCULATING THE DIELECTRIC STRENGTH OF GAS MIXTURES AND A PROPOSED TEST FOR .-SYNERGISM;45
8;CHAPTER 2. BASIC MECHANISMS: CORONA AND BREAKDOWN IN AIR;56
8.1;ZONE OF INFLUENCE OF THE STREAMER AT THE CATHODE OF A POSITIVE POINT TO PLANE CORONA DISCHARGE IN AIR;56
8.2;RELATIVE IMPORTANCE OF ACTIVE SYNCHRONOUS COMPONENT IN THE CURRENT OF A CORONA DISCHARGE;67
8.3;POSSIBLE INTERPRETATION OF THE GAS DISCHARGE STRUCTURE IN A ROD/PLANE GAP;78
8.4;BREAKDOWN AND V-I CHARACTERISTICS OF DRY AIR BELOW PASCHEN MINIMUM IN CROSSED ELECTRIC AND MAGNETIC FIELDS;89
9;CHAPTER 3. BASIC MECHANISMS: DISCHARGE PROCESSES IN SF6;96
9.1;IMPULSE BREAKDOWN AND PREBREAKDOWN CORONA PROCESSES IN SF6 AND SF6/N2 MIXTURES;96
9.2;THE RELATION BETWEEN LUMINOUS PHENOMENA AND DISCHARGE MECHANISM IN SF6;105
9.3;ELECTRICAL BREAKDOWN IN COMPRESSED SF6 BETWEEN HIGHLY POLISHED ELECTRODES;113
9.4;EFFECT OF POLARITY ON THE BREAKDOWN VOLTAGE OF GAS GAPS;121
10;CHAPTER 4. NEW GASEOUS DIELECTRICS;128
10.1;NEW UNITARY AND MULTICOMPONENT GASEOUS DIELECTRICS;128
10.2;THE BREAKDOWN BEHAVIOUR OF SOME NEW GASES AND GAS MIXTURES IN UNIFORM AND NONUNIFORM FIELDS;141
10.3;ELECTRIC STRENGTH OF SOME GASES AND GAS MIXTURES;150
10.4;DC BREAKDOWN STRENGTHS OF SOME MULTICOMPONENT GAS MIXTURES IN CONCENTRIC CYLINDER GEOMETRIES;162
10.5;PASCHEN CHARACTERISTICS OF GASES IN A CROSSED MAGNETIC FIELD;173
11;CHAPTER 5. IMPULSE BREAKDOWN;182
11.1;ELECTRICAL BREAKDOWN STUDIES OF SF6/C02/FLUOR0CARBON MIXTURES;182
11.2;IMPULSE BREAKDOWN OF CORRUGATED COAXIAL ELECTRODES IN COMPRESSED SF6;192
11.3;IMPULSE BREAKDOWN OF c-C4F8/SF6 and c-C4F8/SF6/N2;203
12;CHAPTER 6. SURFACE EFFECTS;214
12.1;EVALUATION OF THE EFFECT OF SURFACE DEFECTS ON BREAKDOWN IN STRONGLY ELECTRONEGATIVE GASES OR GAS MIXTURES;214
12.2;INFLUENCE OF COATING POLISHED AND ROUGH ELECTRODES ON THE IMPULSE AND AC BREAKDOWN OF SF6;223
12.3;ELECTRODE-AREA AND SURFACE-ROUGHNESS EFFECTS ON BREAKDOWN OF SF6/N2 MIXTURES;231
12.4;FLASHOVER STUDIES IN SF6-N2 MIXTURES USING DIRECT APPLIED VOLTAGES;240
12.5;THE EFFECT OF SURFACE ROUGHNESS ON THE AC CORONA ONSET VOLTAGE FOR CYLINDRICAL CONDUCTORS IN AIR;250
13;CHAPTER 7. EFFECTS OF PARTICLES;256
13.1;INFLUENCE OF CONDUCTIVE PARTICLES ON THE DC-VOLTAGE STRENGTH OF SPACERS IN COMPRESSED SF6;256
13.2;INFLUENCE OF A CONDUCTING PARTICLE ATTACHED TO AN EPOXY RESIN SPACER ON THE BREAKDOWN VOLTAGE OF COMPRESSED-GAS INSULATION;263
13.3;EFFECTS OF PARTICLE CONTAMINATION IN SF6 CGIT SYSTEMS AND METHODS OF PARTICLE CONTROL AND ELIMINATION;269
13.4;PARTICLE TRAPS IN GAS-INSULATED SYSTEMS;279
13.5;ELECTROSTATICS OF PARTICLE CONTROL IN GAS-INSULATED APPARATUS;288
14;CHAPTER 8. DECOMPOSITION, AGING, AND SIMULATION;296
14.1;THERMAL AGING OF DIELECTRIC GASES;296
14.2;PREDICTION OF ELECTRICAL BREAKDOWN CARBONIZATION OF GASES AND GAS MIXTURES;307
14.3;PARTIAL-DISCHARGE PULSE HEIGHT DISTRIBUTIONS AND FREQUENCIES FOR POSITIVE AND NEGATIVE DC CORONA IN SF6 AND SF6-N2 MIXTURES;316
14.4;THE APPLICATION OF CHARGE SIMULATION METHOD TO THREE DIMENSIONAL ASYMMETRIC FIELD WITH TWO DIELECTRIC MEDIA;325
15;CHAPTER 9. STANDARDS AND TESTING;336
15.1;TEST ELECTRODES FOR MEASURING THE INTRINSIC INSULATING STRENGTH OF GASES;336
15.2;HIGH VOLTAGE TESTING OF METAL-ENCLOSED, GAS-INSULATED SUBSTATIONS ON-SITE WITH OSCILLATING SWITCHING IMPULSE VOLTAGES;345
15.3;IMPLICATIONS IN LONG-TERM FIELD TESTING OF GAS-INSULATED EQUIPMENT;354
15.4;TRANSIENT HIGH VOLTAGES ON THE GROUNDED ENCLOSURES OF GAS-INSULATED TRANSMISSION EQUIPMENT;362
15.5;PARTIAL DISCHARGE LOCATION IN GAS-INSULATED SWITCHGEAR;371
15.6;THE MEASUREMENT OF D C VOLTAGES UP TO 1 MV USING SPHERE-GAPS AND ROD-GAPS;380
15.7;SWITCHING SURGE DISCHARGE CHARACTERISTICS OF LARGE CONDUCTOR - TOWER AIR GAPS;388
15.8;A SOLUTION TO LAPLACE'S EQUATION FOR HYPERBOLOIDAL ELECTRODES WITH APPLICATIONS TO DIELECTRIC TESTING IN NONUNIFORM ELECTRIC FIELDS;396
16;CHAPTER 10. GAS-INSULATED EQUIPMENT;402
16.1;THE FUTURE TESTING NEEDS OF GAS-INSULATED SUBSTATIONS;402
16.2;EXPERIMENTAL STUDY OF THE BREAKDOWN CHARACTERISTICS OF LARGE SCALE GAS-INSULATED SYSTEMS;413
16.3;PARTIAL DISCHARGE INCEPTION AND BREAKDOWN STUDIES ON MODEL SHEET-WOUND, COMPRESSED SF6 GAS-IMPREGNATED POLYMER FILM-INSULATED WINDINGS;422
16.4;DYNAMICS OF POWER ARCS IN CO-AXIAL ELECTRODE GEOMETRY;431
17;CHAPTER 11. BIOENVIRONMENTAL EFFECTS;442
17.1;ASPECTS OF ENVIRONMENTAL EFFECTS OF DIELECTRIC GASES;442
17.2;ASSESSMENT OF POTENTIAL HEALTH EFFECTS OF DIELECTRIC GASES;452
17.3;THE TOXICOLOGY OF CERTAIN GASEOUS FLUOROCARBONS;463
17.4;TESTING AND EVALUATION CF CHEMICAL HAZARDS UNDER THE TOXIC SUBSTANCES CONTROL ACT;473
18;CHAPTER 12. FORUMS;480
18.1;FORUM I: FUTURE RESEARCH DIRECTIONS IN GASEOUS DIELECTRICS;480
18.2;FORUM I I : FUTURE DIRECTIONS IN GAS-INSULATED APPARATUS;488
19;List of Attendees;498
20;AUTHOR INDEX;508