rel="nofollow" href="#ulink_ffa9f10a-2ae1-5c84-8991-ab6648b9e87c">7.5 Mechanism of Property Enhancement of the New Mixed Insulation Oil on Power Frequency Breakdown of Oil–Paper Insulation
7.6 Enhancing Effect and Mechanism of the New Mixed Insulation Oil on Flashover Voltage of Oil–Paper Insulation
7.7 Application of the New Mixed Insulation Oil: Service Experiences
7.8 Conclusions and Future Scope
References
17 8 Natural Ester Nanosfluids as Alternate Insulating Oils for Transformers 8.1 Introduction 8.2 Preparation of Natural Ester Nanofluids and Stability Analysis 8.3 Properties of Natural Esters and Natural Ester Nanofluids 8.4 Conclusion References
18 9 Dielectric Properties of Silica‐Based Synthetic Ester Nanofluid 9.1 Introduction 9.2 Nanofluid Preparation and Characterization 9.3 Frequency Domain Dielectric Response 9.4 Time Domain Dielectric Response 9.5 Conduction at High Electric Field 9.6 Corona Inception Voltage 9.7 Conclusions and Future Scope References
19 10 Behavior of Ester Liquids Under Various Operating Fault Conditions 10.1 Introduction 10.2 Dissolved Gas Analysis and Transformer Faults 10.3 Simulation of Various Faults in Laboratory Environment 10.4 Influence of Different Faults on the State of Liquid and Gassing Tendency 10.5 Conclusions and Future Scope References
20 11 In‐Service Performance of Natural Esters 11.1 Introduction 11.2 Reasons Why These Utilities Chose a Natural Ester 11.3 Transformers Under Study 11.4 Summary of Research Applied to Manage These Transformers 11.5 Fluid Temperature at Rated Load 11.6 Breakdown Voltage and Water Content 11.7 Investigations into Oxidation and Handling Fluid‐Impregnated Paper 11.8 Study on Installation and Early Operation of a Power Transformer Filled with Natural Ester 11.9 Fleet Measurements 11.10 Summary References
21 Index
22 Books in the IEEE Press Series on Power Engineering
List of Tables
1 Chapter 2Table 2.1 Typical fatty acid composition of some vegetable oils.Table 2.2 Basic properties of NEO [2,6–8, 13, 21, 26].Table 2.3 Composition of Pongamia.Table 2.4 Composition of Jatropha.Table 2.5 IEC gas ratios.Table 2.6 Types of faults.Table 2.7 Doernenburg gas ratio method.Table 2.8 Types of faults by Doernenburg ratio method.Table 2.9 Types of faults by Rogers ratio method.Table 2.10 Types of faults.
2 Chapter 3Table 3.1 Proportions of materials for thermal aging according to IEC 62332‐...Table 3.2 Aging temperatures found in the bibliography.Table 3.3 Initial moisture content of solid insulation.Table 3.4 Material ratio in the aging process.Table 3.5 Constants to determine per unit transformer insulation life.Table 3.6 Loss of life data according to [108] and [113].Table 3.7 Estimated parameters of Eq. (3.24).Table 3.8 Estimated parameters of Eq. (3.25).Table 3.9 Estimated parameters of Eq. (3.30), applying different end‐of‐life...Table 3.10 Correlation of DP and retained tensile strength (%).
3 Chapter 4Table 4.1 Fatty acid composition of vegetable oils.Table 4.2 Breakdown voltage of ester fluids under AC and DC voltages.Table 4.3 Flash point and fire point of ester fluids.Table 4.4 Dynamic viscosity of ester fluids.Table 4.5 Dielectric permittivity and dissipation factor of ester fluids [17...Table 4.6 Recommended aging temperature and duration of insulating fluids.Table 4.7 PDIV of thermally aged ester fluids under AC harmonic frequencies.Table 4.8 PDIV of thermally aged ester fluids under AC harmonic frequencies ...Table 4.9 Evaluation of different methods used for ECT of fluids.Table 4.10 Limits on IFT based on voltage class of transformer.Table 4.11 Composition of thermal aged ester fluid (160 °C) based on GC‐MS d...Table 4.12 Surface discharge inception voltage (SDIV) of thermally aged este...Table
