Insulation Characteristics of Oil-impregnated Paper Bushing Under the Combined Electrical-thermal Effect

被引：0
|
作者：
Wang C. [1 ]
Hu W. [2 ]
Luo X. [2 ]
Xie X. [2 ]
Xu Z. [2 ]
Yin P. [2 ]
机构：
[1] State Grid Hubei Electric Power Co., Ltd., Wuhan
[2] State Key Laboratory of Power Grid Environmental Protection, China Electric Power Research Institute, Wuhan
来源：
Gaodianya Jishu/High Voltage Engineering | 2019年 / 45卷 / 08期
关键词：
AC transformer bushing; Different load; Electrical-thermal test; Insulation characteristics; Oil-impregnated paper Insulation;
D O I：
10.13336/j.1003-6520.hve.20190731034
中图分类号：
学科分类号：
摘要：
In order to investigate the insulation characteristics of AC oil-impregnated paper bushing during its operation, a combined electrical-thermal test platform was established to carry out the insulation characteristics tests under different oil temperature conditions and different load conditions. The change law of dielectric loss factor, capacitance, insulation resistance and frequency domain dielectric spectrum for AC oil-impregnated paper bushing under different conditions were investigated, and the mechanism of the change law was analyzed systematically based on the dielectric polarization theory as well. The results show that the change of transformer oil temperature will lead to the regular change of insulation performance of bushing. The influence of different loads on the bushing is mainly concentrated on the thermal effect, and the change of load will be finally reflected by the change of the internal temperature of the bushing. At the same oil temperature, when the bushing which is applied with voltage and current simultaneously is under the different load condition, it has worse insulation performance than the one with single assessment factor. Therefore, it can be more accurate to grasp the insulation characteristics of bushing when tests with a combined electrical-thermal effect are performed, providing a strong support for the evaluation and diagnosis of bushing. © 2019, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
引用
收藏
页码：2629 / 2636
页数：7
相关论文
共 20 条
  • [1] Liu Z., Ultra-high Voltage Grid, (2005)
  • [2] Liu Z., Ultra-high Voltage AC Electrical Equipment, (2008)
  • [3] Xie X., Hu W., Peng Z., Et al., Dielectric loss characteristics of 550 kV resin-impregnated paper oil-SF<sub>6</sub> bushing during thermal-stabilization testing, High Voltage Engineering, 38, 10, pp. 2749-2754, (2012)
  • [4] Yang L., Huang J., Xu Z., Et al., Investigation on thermal aging characteristics and lifetime model of oil-paper insulation for HV AC bushing, Transactions of China Electrotechnical Society, 31, 5, pp. 144-150, (2016)
  • [5] Dai Q., Qi B., Li C., Et al., Influence of moisture ingress on the insulation characteristic in oil-immigrated paper bushings under three test condition, High Voltage Engineering, 44, 2, pp. 554-560, (2018)
  • [6] Yew J.H., Saha T.K., Thomas A.J., Impact of temperature on the frequency domain dielectric spectroscopy of power transformer insulation, IEEE Power Engineering Society General Meeting, (2006)
  • [7] Ekanayake C., Gubanski S.M., Graczkowski A., Et al., Frequency response of oil impregnated pressboard and paper samples for estimating moisture in transformer insulation, IEEE Transactions on Power Delivery, 21, 3, pp. 1309-1317, (2006)
  • [8] Wu G., Xia G., Song Z., Et al., Status assessment of aging condition of transformer oil-paper insulation based on time domain dielectric spectroscopy and wavelet analysis, High Voltage Engineering, 44, 1, pp. 226-233, (2018)
  • [9] Liao R., Yuan Q., Tang C., Et al., Influence of different aging condition on characteristics of frequency domain spectroscopy of oil-paper insulation medium, High Voltage Engineering, 36, 7, pp. 1612-1618, (2010)
  • [10] Du Z., Nie D., Zhang L., Et al., Insulation evaluation of high voltage bushing based on frequency domain spectroscopy analysis, High Voltage Apparatus, 49, 11, pp. 6-11, (2013)
12