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884 / 2022-06-30 23:18:43
Effect of Crystal Morphology on Breakdown Properties of XLPE at Mesoscale
Crystal Morphology,Breakdown Properties,XLPE,Mesoscale
7. High Voltage Cable Insulation
终稿
You Wu / Tianjin University
Boxue Du / Tianjin University
Zhonglei Li / Tianjin University
Yuming Dong / Tianjin University
Heyu Wang / Tianjin University
As a polymer material with a semi-crystalline structure, the macroscopic insulation breakdown properties of cross-linked polyethylene (XLPE) insulation materials under the action of electric fields are closely related to their crystal morphology at the mesoscopic scale. In order to study the effect of crystallization morphology of XLPE material on AC breakdown strength and analyze its mechanism of action, four different ways were used in this paper to control the cooling rate of the material during the crystallization process, and XLPE materials with different crystallization morphologies were prepared and obtained. The crystal morphology of the material was also characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD), and its insulation properties were tested using a broadband dielectric spectrometer, DC conductivity, and AC breakdown platform. The experimental results show that the reduction of the cooling rate can prolong the crystallization time and effectively refine the crystal morphology inside the material, making the size of the spherical crystal larger and the crystallinity higher. The higher cooling rate leads to a lower dielectric constant and higher conductivity of the XLPE material, which also causes a decrease in the AC breakdown field strength of the material at different temperatures.

 
重要日期

  • 会议日期

    09月25日

    2022

    至

    09月29日

    2022

  • 08月15日 2022

    提前注册日期

  • 09月10日 2022

    报告提交截止日期

  • 11月10日 2022

    注册截止日期

  • 11月30日 2022

    初稿截稿日期

  • 11月30日 2022

    终稿截稿日期

主办单位
IEEE DEIS
承办单位
Chongqing University
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