470 / 2022-03-15 23:46:46
Effect of temperature on partial discharge characteristics of XLPE cable at power frequency
pattial discharge;high temperature;electrical trees
终稿
Xiaoting Su / State Grid Xi'an Electric Power Supply Company
Jiankang Zheng / State Grid Xi'an Electric Power Supply Company
Mingyang Xu / Xi'an Jiaotong University;School of electrical engineering
Liang Lv / State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University
Zhihui Lin / State Key Laboratory of Electrical Insulation and Power Equipment;Xi‘an Jiaotong University
Purpose/Aim

In the process of cable manufacturing, transportation, laying and operation, it is inevitable to cause some  defects in the insulation layer. In case of line failure or emergency power supply, the temporary overload operation of the cable leads to short-term temperature rise. High temperature is easy to cause partial discharge of potential defects of XLPE cable, which leads to insulation deterioration and endangers the safe operation of the cable.

Experimental/Modeling methods

In this paper, a temperature-controlled AC branch-partial discharge test system was built. The pin-plate electrode was used to simulate the field intensity concentration area in cable insulation, and the images and partial discharge signals during the growth of electrical branches were collected to compare the partial discharge characteristics of XLPE at different temperatures.  

Results/discussion

With the increase of temperature, PDIV gradually decreased and the partial discharge time was significantly shortened. At 1.2 and 1.5 times of PDIV, the PD amplitude of the discharge dense region in the prpd spectrum increases with the increase of temperature, and the electrical tree presents different forms.

Conclusions

The high temperature intensifies the deterioration of XLPE cable defects,which seriously threatens the safety and reliability of AC XLPE cable.

 
重要日期
  • 会议日期

    09月25日

    2022

    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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