利比亚气候对聚合物高压绝缘体性能影响的风险评估和HDPE/PA6共混工艺研究

发布时间：2022-08-08 12:07

　　在利比亚,聚合物的产量较高,尤其是在电器方面的应用比较广泛。在架空输电线路和配电线路中大量使用了聚合物绝缘子。环境或自然因素导致其机械性能的下降,使这些聚合物绝缘材料在使用过程中产生了很多问题。本文的研究是为了确定利比亚不同电力公司使用的非陶瓷绝缘材料的使用条件。通过实验研究了这些聚合物绝缘材料的适宜性和可降解性,评估在利比亚南部地区干旱的沙漠气候中用于高压传输和配线的聚合物绝缘材料的性能。在利比亚,撒哈拉沙漠夏季的环境温度白天在50-56℃,夜间气温下降到30-40摄氏度,同样在冬季白天气温在35-30℃,夜间气温在5-20 ℃。本文根据IEC标准1109建立了聚合物绝缘子综合评价体系,考虑太阳辐射从1到4mW/m2,研究了受热和紫外线对这些聚合物绝缘子的影响。通过专门设计的加速老化试验箱,对老化的绝缘体的强度（承受能力）与新的聚合物绝缘材料相比较。电性能测试表明热塑性弹性体（TPE）绝缘材料的性能高于硅橡胶（SiR）绝缘体,并对其进行了冲击试验测试。正负极中光强度波形采用1.2/50μs,根据扫描电镜显示,热塑性弹性体优于硅橡胶,因为硅橡胶衰老程度更高而且表面凹凸不平,而硅橡胶击穿... 

【文章页数】：96 页

【学位级别】：博士

【文章目录】：
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


【参考文献】：
期刊论文
[1]IN SITU COMPATIBILIZATION OF LDPE/NYLON-6 BLEND USING LOW MOLECULAR WEIGHT INTERFACIAL AGENT AS A CHEMICAL COMPATIBILIZER[J]. 李蓓,张瑞丰,蔡忠龙.  Chinese Journal of Polymer Science. 1997(03)



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