Alternative Liquid Dielectrics for High Voltage Transformer Insulation Systems Performance Analysis and Applications 1st Edition by U Mohan Rao, I Fofana, R Sarathi ISBN 9781119800163 1119800161

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ISBN 10: 1119800161
ISBN 13: 9781119800163
Author: U Mohan Rao, I Fofana, R Sarathi

Alternative Liquid Dielectrics for High Voltage Transformer Insulation Systems Performance Analysis and Applications 1st Edition Table of contents:

1 Liquid Insulation for Power Transformers

1.1 Background of Liquid‐Filled Transformers

1.2 Insulation System in Liquid‐Filled Transformers

1.3 Insulation Aging Phenomena in Transformers

1.4 Transformer Insulating Liquids

References

2 Processing and Evaluation of Natural Esters

2.1 Introduction

2.2 Significant Natural Ester Liquids

2.3 Processing and Pretreatment

2.4 Properties and Evaluation of Natural Esters

2.5 Degradation of Different Vegetable Oils

2.6 Dissolved Gas Analysis in Natural Esters

2.7 Challenges in Using Natural Esters as Insulating Liquid

2.8 Conclusions and Future Scope

References

3 Compatibility of Esters with Cellulosic Insulation Materials

3.1 Introduction

3.2 Procedure of Accelerated Thermal Aging

3.3 Assessment of Liquid Degradation

3.4 Assessment of Paper Degradation

3.5 Remaining Life of Transformer Insulation

3.6 Conclusions

References

4 Degradation Assessment of Ester Liquids

4.1 Introduction

4.2 Procedure of Accelerated Thermal Aging

4.3 Assessment of Liquid Degradation

4.4 Assessment of Paper Degradation

4.5 Conclusions and Future Scope

References

5 End Life Behavior of Ester Liquids in High‐Voltage Transformers

5.1 Introduction

5.2 Evolution of Colloidal and Soluble Decay Particles

5.3 Colloidal Particles – Centrifugal Treatment (ASTM D1698)

5.4 Soluble Particles – Fuller’s Earth Filtration (ASTM D7150)

5.5 Feasibility of Fuller’s Earth Filtration for Ester Liquids

5.6 Conclusions and Future Scope

References

6 Prebreakdown and Breakdown Phenomena in Ester Dielectric Liquids

6.1 Introduction

6.2 Research Methods in Assessment of Prebreakdown Phenomena in Ester Liquids

6.3 Initiation of Streamers in Dielectric Liquids

6.4 Streamer Propagation

6.5 Influence of Temperature on Prebreakdown Phenomena in Natural Ester Liquids

6.6 Influence of Thermal Aging on Prebreakdown Phenomena in Synthetic Ester Liquids

6.7 Conclusions and Future Scope

References

7 Miscibility and Engineering Application of a Novel Mixed Fluid

7.1 Introduction

7.2 Need and Research Progress of Mixed Insulating Liquids

7.3 Preparation Method for the New Mixed Insulating Oil

7.4 Thermal Aging Characteristics of the New Mixed Insulation Oil–Paper Insulation and Its Delaying Thermal Aging Mechanism

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

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

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

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

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

Index

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Tags: U Mohan Rao, I Fofana, R Sarathi, Alternative Liquid Dielectrics, High Voltage, Performance