在利比亞,聚合物的產(chǎn)量較高,尤其是在電器方面的應用比較廣泛。在架空輸電線路和配電線路中大量使用了聚合物絕緣子。環(huán)境或自然因素導致其機械性能的下降,使這些聚合物絕緣材料在使用過程中產(chǎn)生了很多問題。本文的研究是為了確定利比亞不同電力公司使用的非陶瓷絕緣材料的使用條件。通過實驗研究了這些聚合物絕緣材料的適宜性和可降解性,評估在利比亞南部地區(qū)干旱的沙漠氣候中用于高壓傳輸和配線的聚合物絕緣材料的性能。在利比亞,撒哈拉沙漠夏季的環(huán)境溫度白天在50-56℃,夜間氣溫下降到30-40攝氏度,同樣在冬季白天氣溫在35-30℃,夜間氣溫在5-20 ℃。本文根據(jù)IEC標準1109建立了聚合物絕緣子綜合評價體系,考慮太陽輻射從1到4mW/m2,研究了受熱和紫外線對這些聚合物絕緣子的影響。通過專門設計的加速老化試驗箱,對老化的絕緣體的強度（承受能力）與新的聚合物絕緣材料相比較。電性能測試表明熱塑性彈性體（TPE）絕緣材料的性能高于硅橡膠（SiR）絕緣體,并對其進行了沖擊試驗測試。正負極中光強度波形采用1.2/50μs,根據(jù)掃描電鏡顯示,熱塑性彈性體優(yōu)于硅橡膠,因為硅橡膠衰老程度更高而且表面凹凸不平,而硅橡膠擊穿... 

【文章頁數(shù)】：96 頁

【學位級別】：博士

【文章目錄】：
Abstract
摘要
List of Abbreviations
Chapter 1 Introduction
    1.1 Introduction
    1.2 Applications of polymeric insulators
    1.3 Classification of insulators
        1.3.1 Glass vs polymer insulators for outdoors
        1.3.2 Porcelain Insulators
        1.3.3 Polymeric insulators
            1.3.3.1 Advantages of polymeric insulators
            1.3.3.2 Disadvantages of polymeric insulators
        1.3.4 Comparison of ceramic and non-ceramic insulators
    1.4 Basic parts of polymeric insulator
    1.5 Types of Polymeric insulators
        1.5.1 Silicone rubber polymeric insulators (SiR)
        1.5.2 Thermoplastic elastomers polymeric insulators (TPE)
    1.6 Effect on performance of polymeric insulators
        1.6.1 Voltage polarity effect on performance of polymeric insulators
        1.6.2 Environmental effect on performance of polymeric insulators
        1.6.3 Aging of polymeric insulators
            1.6.3.1 Degradation anatomy of a polymer insulator
            1.6.3.2 Aging by exposure to ultraviolet radiations
        1.6.4 Loss of hydrophobicity
            1.6.4.1 Stresses due to high voltage environments
            1.6.4.2 Environmental ageing factors
            1.6.4.3 Accelerated multi stress aging of TPE insulators in different environments
            1.6.4.4 Polymers and fillers used in high voltage applications
            1.6.4.5 Corona discharge
    1.7 Laboratory accelerated ageing techniques
    1.8 Background of the study
        1.8.1 Introduction
        1.8.2 Study area
            1.8.2.1 Geographical location of study area
            1.8.2.2 Effect of climate on the performance of polymeric insulators
            1.8.2.3 Rain effect on distribution of electric field
            1.8.2.4 Fluid diffusion to the SIR surface and hydrophobic properties
    1.9 Nature of problem
    1.10 Problem statement
    1.11 Key Issue
    1.12 Innovations
    1.13 Objectives of the study
Chapter 2 High voltage polymeric insulators performance under simulated environmentalconditions in desert areas of Southern Libya
    2.1 Introduction
    2.2 Materials and Methods
        2.2.1 Acceleration of aging cycle
        2.2.2 Accelerated aging test chamber design
        2.2.3 Ultraviolet Radiation or UVA Lamps
        2.2.4 Details of Polymeric Insulators
        2.2.5 Power Supply
        2.2.6 Arrangement of Heating:
        2.2.7 Timers
        2.2.8 Experimental aging testing conditions
    2.3. Results
        2.3.1 Impulse Test
        2.3.2 Power-Frequency Test
        2.3.3 Scanning Electron Microscopy (SEM)
        2.3.4 X-RAY Photoelectron Spectroscopic (XPS)
    2.4 Discussion
    2.5 Conclusions
Chapter 3 Barrier, Mechanical, Morphological and Thermal Properties of CompatibilizedHigh Density Polyethylene and Polyamide 6 Blends
    3.0 Introduction
    3.1 Materials
    3.2 Blends preparation
    3.3 Characterization of blends
    3.4 Results and discussion
    3.5 Conclusions
Chapter 4 Conclusions and future works recommendations
    4.1 Conclusion
    4.2 Future works recommendations
References
Acknowledgements
Author Publications
Author and Supervisor information
    Author profile
    Tutor profile
附件


【參考文獻】：
期刊論文
[1]IN SITU COMPATIBILIZATION OF LDPE/NYLON-6 BLEND USING LOW MOLECULAR WEIGHT INTERFACIAL AGENT AS A CHEMICAL COMPATIBILIZER[J]. 李蓓,張瑞豐,蔡忠龍.  Chinese Journal of Polymer Science. 1997(03)



本文編號：3671479