| Acknowledgements | 第6-7页 |
| Abstract | 第7页 |
| 摘要 | 第8-12页 |
| Chapter 1 Introduction | 第12-16页 |
| 1.1 Introduction | 第12页 |
| 1.2 Review of the Previous Work | 第12-14页 |
| 1.2.1 Influence of temperature on partial discharge of oil paper insulation | 第12-14页 |
| 1.3 Goals and objectives | 第14-15页 |
| 1.3.1 Objectives | 第14页 |
| 1.3.2 Benefits of research | 第14-15页 |
| 1.4 Thesis outlines | 第15-16页 |
| Chapter 2 Physical Parameters That Affect Converter Transformer and Its Insulatio Mostly Use | 第16-29页 |
| 2.1 Mineral oil | 第16页 |
| 2.2 Esters | 第16-17页 |
| 2.3 Comparison between mineral oil and esters | 第17-19页 |
| 2.3.1 Water solubility | 第17页 |
| 2.3.2 Fire resistance | 第17-18页 |
| 2.3.3 Environmental issues | 第18-19页 |
| 2.4 Pressboard (transformer board) | 第19-21页 |
| 2.4.1 Treatment process of press board | 第20-21页 |
| 2.5 Physical parameters affecting PD in converter transformer | 第21-29页 |
| 2.5.1 Temperature | 第21-22页 |
| 2.5.2 Water influence in oil-paper systems (Moisture) | 第22-24页 |
| 2.5.3 Electrodes geometry | 第24页 |
| 2.5.4 Waveform influence on converter transformers insulation | 第24-29页 |
| Chapter 3 Influence of Temperature on Partial Discharge with Cylindrical Model In Oil Paper Insulation | 第29-51页 |
| 3.1 Introduction | 第29页 |
| 3.2 Experimental setups, test procedures and data processing | 第29-33页 |
| 3.2.1 Partial discharge experiment circuit | 第30-31页 |
| 3.2.2 Partial discharge testing cavity | 第31-32页 |
| 3.2.3 Oil processing | 第32页 |
| 3.2.4 Insulation paper processing | 第32页 |
| 3.2.5 Temperature-Control Box (TCB) | 第32-33页 |
| 3.2.6 PD Discharge models | 第33页 |
| 3.3 Influence of temperature on partial discharge of oil paper insulation under cylindrical to plate model | 第33-51页 |
| 3.3.1 Introduction | 第33页 |
| 3.3.2 Detection system | 第33-34页 |
| 3.3.3 Data analysis and results discussions | 第34-45页 |
| 3.3.4 Diagnoses of insulations paper under different temperature | 第45-50页 |
| 3.3.5 Conclusions | 第50-51页 |
| Chapter 4 Influence of Temperature on Partial Discharge With Sphere to Plate Model in Oil Paper Insulation under AC And DC Combined Voltage | 第51-59页 |
| 4.1 Introduction | 第51页 |
| 4.2 Characteristics of PD quantities detected under 16℃, 34℃ 52℃,70℃ and 88℃ | 第51-55页 |
| 4.3 Comparison of results of CIC,UHF and AE under different temperature with same PD model | 第55页 |
| 4.4 Diagnosis of insulations caused by different temperature | 第55-58页 |
| 4.4.1 Paper insulation diagnosis | 第55-56页 |
| 4.4.2 Oil diagnosis under sphere model | 第56-58页 |
| 4.5 Conclusions | 第58-59页 |
| Chapter 5 Influence of Temperature on Partial Discharge with Needle to Plate Model 48 | 第59-67页 |
| 5.1 Introduction | 第59页 |
| 5.2 Sizes and dimensions of needle to plate model | 第59-60页 |
| 5.3 Results discussion for all temperature under needle to plate model | 第60-63页 |
| 5.3.1 Trends line of PD variation according to different temperature at PDIV and PD LAV | 第60-62页 |
| 5.3.2 Comparison of CIC,UHF and AE on the same trend lines | 第62-63页 |
| 5.4 Diagnosis of insulations caused by different temperature | 第63-65页 |
| 5.4.1 Diagnosis of insulation paper under needle to plate model | 第63-64页 |
| 5.4.2 Oil diagnosis under needle to plate model | 第64-65页 |
| 5.5 Conclusions | 第65-67页 |
| Chapter 6 General Conclusion of Three PD Models and Their Temperature Influence | 第67-70页 |
| 6.1 The effects of partial discharge influenced different temperature on the insulation paper | 第67页 |
| 6.2 The effects of partial discharge influenced different temperature on the partial characteristics with trend line of number of pulse and discharge total | 第67-68页 |
| 6.3 The effects of partial discharge influenced different temperature in the oil insulation | 第68-70页 |
| Chapter 7 Future work | 第70-71页 |
| References | 第71-73页 |
