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BL
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| Record Number
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862030
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| Main Entry
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Vahidi, Behrooz
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| Title & Author
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Quality confirmation tests for power transformer insulation systems /\ Behrooz Vahidi, Ashkan Teymouri.
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| Publication Statement
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Cham, Switzerland :: Springer,, [2019]
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| Page. NO
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1 online resource
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| ISBN
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3030196925
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: 3030196933
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: 3030196941
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: 303019695X
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: 9783030196929
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: 9783030196936
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: 9783030196943
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: 9783030196950
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9783030196929
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| Bibliographies/Indexes
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Includes bibliographical references and index.
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| Contents
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Intro; Preface; Contents; 1 Unused Mineral Insulating Oil; 1.1 Introduction; 1.2 Mineral Oil; 1.3 Classification of Mineral Oil Based on Application; 1.3.1 Transformers Oil; 1.3.2 Switchgear Oil in Low Temperatures; 1.4 Additives; 1.5 Special Cases; 1.6 Analysis of Potentially Corrosive Sulphur; 1.7 Oil Contamination; References; 2 In-Service Mineral Insulating Oil; 2.1 Introduction; 2.2 Oil Monitoring and Purification; 2.3 Oil Ageing and Degradation; 2.4 Oil Tests; 2.4.1 Color and Appearance; 2.4.2 Breakdown Voltage; 2.4.3 Water Content; 2.4.4 Water in the Insulation System; 2.4.5 Acidity
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2.4.6 Dielectric Dissipation Factor (DDF) and Resistivity2.4.7 Additives and Oxidation Stability; 2.4.8 Sludge and Sediment; 2.4.9 Interfacial Tension; 2.4.10 Particle Content; 2.4.11 FlashPoint; 2.4.12 Compatibility of Insulating Oil; 2.4.13 Pour Point; 2.4.14 Density; 2.4.15 Viscosity; 2.4.16 PCB; 2.4.17 Corrosive Sulphur; 2.4.18 Dibenzyl Disulphides (DBDS); 2.4.19 Passivators; 2.5 In-Service Oil Monitoring; 2.5.1 Uninhibited Oil Monitoring; 2.5.2 Inhibited Oil Monitoring; 2.6 Time Schedule of Sampling and Testing In-Service Oil; 2.7 Available On-Site Tests
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2.8 Classification of Operating Oil2.9 Corrective Actions; 2.10 Purification; 2.10.1 Physical Purification; 2.10.2 Chemical Purification (Refinement); 2.11 Replacing Oil in Electrical Equipment; 2.12 Adding Passivators; 2.13 Determining Water Concentration in the Oil; References; 3 Chemical Indicators; 3.1 Introduction; 3.2 Insulation Paper Life Determination; 3.3 Cellulose; 3.4 Cellulose Molecular Structure; 3.5 Cellulosic Insulation; 3.6 Degree of Polymerization; 3.7 Oil Impregnated Insulation Paper; 3.8 Ageing of Oil Impregnated Insulation Paper; 3.9 Ageing Mechanism; 3.9.1 Pyrolysis
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3.23 MethanolReferences; 4 Dissolved Gas Analysis (DGA); 4.1 Introduction; 4.2 Total Flammable Dissolved Gas in the Transformer; 4.3 Allowable Concentration of Gases in a Transformer; 4.4 Gas Ratio Methods; 4.4.1 Dürrenberg Method; 4.4.2 Rogers Ratio; 4.4.3 IEC Ratio Method; 4.5 Duval Triangle Method; 4.6 Detection of Partial Discharge Using DGA; 4.7 Impact of DGA Accuracy on Fault Detection; References; 5 Other Tests; 5.1 Introduction; 5.2 Partial Discharge (PD); 5.2.1 Corona Discharge; 5.2.2 Surface Discharge; 5.2.3 Discharge in Composite Insulation Materials
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3.9.2 Hydrolysis3.9.3 Oxidation; 3.10 Influence from Acids; 3.11 Ageing of Oil; 3.12 Oil Oxidation; 3.13 Degradation Products in Oil Impregnated Insulation Systems; 3.14 Degradation Products from Cellulosic Insulation; 3.14.1 Water; 3.14.2 Acids; 3.14.3 Furans; 3.14.4 Carbon Oxides; 3.14.5 Hydrocarbons; 3.15 Degradation Products of Oil; 3.15.1 Acids; 3.15.2 Sludge; 3.16 Chemical Indicators; 3.17 Furan Compounds; 3.17.1 Furans Origin; 3.18 The Relationship Between DP and Furans; 3.19 Stability; 3.20 Furans Disadvantages; 3.21 CO2 and CO; 3.22 The Combination of CO2/CO Ratio and 2-Furfural
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| Abstract
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This book focuses on oil-paper insulation included in power transformers, especially for EHV and UHV transformers. The importance on insulation ever increased due to a growing voltage rating of transformers. Within the last decades, although research on the transformer insulation and diagnosis methods has advanced a lot, the insulation of HV transformers remained more or less unchanged. The book is divided into five chapters; the first and second chapters explain the basics of oil insulation, while the third chapter focuses on paper insulation. The final two chapters deal with the methods and outcome of testing both techniques. The primary target audience for this book is graduate students and power system engineers.
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| Subject
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Electric insulators and insulation-- Oils.
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Electric insulators and insulation.
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Electric transformers.
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Electric insulators and insulation-- Oils.
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Electric insulators and insulation.
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Electric transformers.
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| Subject
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TECHNOLOGY ENGINEERING-- Mechanical.
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| Dewey Classification
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621.31937
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| LC Classification
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TK3421
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| Added Entry
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Teymouri, Ashkan
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